diff options
author | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2008-11-19 00:10:54 +0000 |
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committer | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2008-11-19 00:10:54 +0000 |
commit | 60744a36aae604ac3c4499ed54f1082ab8f5947d (patch) | |
tree | e31d312659c912cdf29ef7a677406795fe5b3726 /java/sca/modules/extensibility | |
parent | ad1c9458ea08eb593be252b706a88568f17c494c (diff) |
Copying modules from Equinox branch, to start merging the delta changes from 1.x/original trunk
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@718815 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to '')
31 files changed, 2769 insertions, 0 deletions
diff --git a/java/sca/modules/extensibility-equinox/LICENSE b/java/sca/modules/extensibility-equinox/LICENSE new file mode 100644 index 0000000000..6e529a25c4 --- /dev/null +++ b/java/sca/modules/extensibility-equinox/LICENSE @@ -0,0 +1,205 @@ +
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diff --git a/java/sca/modules/extensibility-equinox/META-INF/MANIFEST.MF b/java/sca/modules/extensibility-equinox/META-INF/MANIFEST.MF new file mode 100644 index 0000000000..d054b26acb --- /dev/null +++ b/java/sca/modules/extensibility-equinox/META-INF/MANIFEST.MF @@ -0,0 +1,24 @@ +Manifest-Version: 1.0
+Private-Package: org.apache.tuscany.sca.extensibility.equinox;version=
+ "1.4"
+Bundle-ActivationPolicy: lazy
+Tool: Bnd-0.0.255
+Bundle-Name: Apache Tuscany SCA Extensibility for Eclipse Equinox
+Created-By: 1.6.0_07 (Sun Microsystems Inc.)
+Bundle-Vendor: The Apache Software Foundation
+DynamicImport-Package: *
+Eclipse-LazyStart: true
+Bundle-Version: 1.4
+Bnd-LastModified: 1225397425625
+Bundle-Activator: org.apache.tuscany.sca.extensibility.equinox.Equinox
+ ServiceDiscoveryActivator
+Bundle-ManifestVersion: 2
+Bundle-Description: Apache Tuscany SCA Extensibility for Eclipse Equin
+ ox
+Bundle-License: http://www.apache.org/licenses/LICENSE-2.0.txt
+Import-Package: org.apache.tuscany.sca.extensibility;version="1.4",
+ org.eclipse.core.runtime.adaptor;resolution:=optional,
+ org.osgi.framework;version="1.4"
+Bundle-SymbolicName: org.apache.tuscany.sca.extensibility.equinox
+Bundle-DocURL: http://www.apache.org/
+
diff --git a/java/sca/modules/extensibility-equinox/NOTICE b/java/sca/modules/extensibility-equinox/NOTICE new file mode 100644 index 0000000000..65c52d01c7 --- /dev/null +++ b/java/sca/modules/extensibility-equinox/NOTICE @@ -0,0 +1,5 @@ +Copyright (c) 2005 - 2008 The Apache Software Foundation
+
+This product includes software developed by
+The Apache Software Foundation (http://www.apache.org/).
+
diff --git a/java/sca/modules/extensibility-equinox/pom.xml b/java/sca/modules/extensibility-equinox/pom.xml new file mode 100644 index 0000000000..5fe4f2cdf3 --- /dev/null +++ b/java/sca/modules/extensibility-equinox/pom.xml @@ -0,0 +1,96 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!-- + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. +--> +<project> + <modelVersion>4.0.0</modelVersion> + <parent> + <groupId>org.apache.tuscany.sca</groupId> + <artifactId>tuscany-modules</artifactId> + <version>1.4-EQUINOX-SNAPSHOT</version> + <relativePath>../pom.xml</relativePath> + </parent> + <artifactId>tuscany-extensibility-equinox</artifactId> + <name>Apache Tuscany SCA Extensibility for Eclipse Equinox</name> + <dependencies> + <dependency> + <groupId>org.apache.tuscany.sca</groupId> + <artifactId>tuscany-extensibility</artifactId> + <version>1.4-EQUINOX-SNAPSHOT</version> + </dependency> + + <dependency> + <groupId>org.eclipse</groupId> + <artifactId>osgi</artifactId> + <version>3.3.0-v20070530</version> + <scope>compile</scope> + </dependency> + + <!-- + Exclude org.eclipse.equinox:app to avoid maven bug/bad equinox version scheme. i.e.: + + Couldn't find a version in [1.0.0-v20070606] to match range [1.0.0,2.0.0) + org.eclipse.equinox:app:jar:null + --> + <dependency> + <groupId>org.eclipse.core</groupId> + <artifactId>runtime</artifactId> + <version>3.3.100-v20070530</version> + <scope>test</scope> + <exclusions> + <exclusion> + <groupId>org.eclipse.equinox</groupId> + <artifactId>app</artifactId> + </exclusion> + </exclusions> + </dependency> + + <!-- + Now include org.eclipse.equinox:app explicitly + --> + <dependency> + <groupId>org.eclipse.equinox</groupId> + <artifactId>app</artifactId> + <version>1.0.0-v20070606</version> + <scope>test</scope> + </dependency> + + </dependencies> + <build> + <plugins> + <plugin> + <groupId>org.apache.maven.plugins</groupId> + <artifactId>maven-dependency-plugin</artifactId> + <version>2.0</version> + <executions> + <execution> + <id>copy-dependencies</id> + <phase>process-test-resources</phase> + <goals> + <goal>copy-dependencies</goal> + </goals> + <configuration> + <outputDirectory>${project.build.directory}/bundles</outputDirectory> + <excludeArtifactIds>osgi,junit,easymock,tuscany-extensibility</excludeArtifactIds> + </configuration> + </execution> + </executions> + </plugin> + </plugins> + </build> +</project> diff --git a/java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java b/java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java new file mode 100644 index 0000000000..bb77b77d0c --- /dev/null +++ b/java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java @@ -0,0 +1,297 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility.equinox; + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.net.URL; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.security.PrivilegedActionException; +import java.security.PrivilegedExceptionAction; +import java.util.Enumeration; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; +import java.util.StringTokenizer; +import java.util.logging.Level; +import java.util.logging.Logger; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscoverer; +import org.osgi.framework.Bundle; +import org.osgi.framework.BundleContext; +import org.osgi.framework.BundleException; + +/** + * A ServiceDiscoverer that find META-INF/services/... in installed bundles + * + * @version $Rev$ $Date$ + */ +public class EquinoxServiceDiscoverer implements ServiceDiscoverer { + private static final Logger logger = Logger.getLogger(EquinoxServiceDiscoverer.class.getName()); + + private BundleContext context; + + public EquinoxServiceDiscoverer(BundleContext context) { + this.context = context; + } + + public static class ServiceDeclarationImpl implements ServiceDeclaration { + private Bundle bundle; + private URL url; + private String className; + private Class<?> javaClass; + private Map<String, String> attributes; + + public ServiceDeclarationImpl(Bundle bundle, URL url, String className, Map<String, String> attributes) { + super(); + this.bundle = bundle; + this.url = url; + this.className = className; + this.attributes = attributes; + } + + public Map<String, String> getAttributes() { + return attributes; + } + + public String getClassName() { + return className; + } + + public Class<?> loadClass() throws ClassNotFoundException { + if (className == null) { + return null; + } + if (javaClass == null) { + javaClass = loadClass(className); + } + return javaClass; + } + + public Class<?> loadClass(String className) throws ClassNotFoundException { + return bundle.loadClass(className); + } + + public URL getLocation() { + return url; + } + + public URL getResource(final String name) { + return AccessController.doPrivileged(new PrivilegedAction<URL>() { + public URL run() { + return bundle.getResource(name); + } + }); + } + + public String toString() { + StringBuffer sb = new StringBuffer(); + sb.append("Bundle: ").append(EquinoxServiceDiscoverer.toString(bundle)); + sb.append(" Resource: ").append(url); + sb.append(" Attributes: ").append(attributes); + return sb.toString(); + } + + } + + /** + * Empty static method to trigger the activation of this bundle. + */ + public static void init() { + } + + private static String toString(Bundle b) { + StringBuffer sb = new StringBuffer(); + sb.append(b.getBundleId()).append(" ").append(b.getSymbolicName()); + int s = b.getState(); + if ((s & Bundle.UNINSTALLED) != 0) { + sb.append(" UNINSTALLED"); + } + if ((s & Bundle.INSTALLED) != 0) { + sb.append(" INSTALLED"); + } + if ((s & Bundle.RESOLVED) != 0) { + sb.append(" RESOLVED"); + } + if ((s & Bundle.STARTING) != 0) { + sb.append(" STARTING"); + } + if ((s & Bundle.STOPPING) != 0) { + sb.append(" STOPPING"); + } + if ((s & Bundle.ACTIVE) != 0) { + sb.append(" ACTIVE"); + } + return sb.toString(); + + } + + /** + * Parse a service declaration in the form class;attr=value,attr=value and + * return a map of attributes + * + * @param declaration + * @return a map of attributes + */ + private static Map<String, String> parseServiceDeclaration(String declaration) { + Map<String, String> attributes = new HashMap<String, String>(); + int index = declaration.indexOf(';'); + if (index != -1) { + attributes.put("class", declaration.substring(0, index).trim()); + declaration = declaration.substring(index); + } else { + int j = declaration.indexOf('='); + if (j == -1) { + attributes.put("class", declaration.trim()); + return attributes; + } else { + declaration = ";" + declaration; + } + } + StringTokenizer tokens = new StringTokenizer(declaration); + for (; tokens.hasMoreTokens();) { + String key = tokens.nextToken("=").substring(1).trim(); + if (key == null) + break; + String value = tokens.nextToken(",").substring(1).trim(); + if (value == null) + break; + attributes.put(key, value); + } + return attributes; + } + + public ServiceDeclaration getFirstServiceDeclaration(String name) throws IOException { + Set<ServiceDeclaration> declarations = getServiceDeclarations(name); + if (declarations.isEmpty()) { + return null; + } else { + return declarations.iterator().next(); + } + } + + public Set<ServiceDeclaration> getServiceDeclarations(String serviceName) throws IOException { + boolean debug = logger.isLoggable(Level.FINE); + Set<ServiceDeclaration> descriptors = new HashSet<ServiceDeclaration>(); + + serviceName = "META-INF/services/" + serviceName; + + for (Bundle bundle : context.getBundles()) { + if (bundle.getBundleId() == 0) { + // Skip system bundle as it has access to the application classloader + continue; + } + Enumeration<URL> urls = null; + try { + // Use getResources to find resources on the classpath of the bundle + // Please note there are cases that getResources will return null even + // the bundle containing such entries: + // 1. There is a match on Import-Package or DynamicImport-Package, and another + // bundle exports the resource package, there is a possiblity that it doesn't + // find the containing entry + // 2. The bundle cannot be resolved, then getResources will return null + urls = bundle.getResources(serviceName); + if (urls == null) { + URL entry = bundle.getEntry(serviceName); + if (entry != null) { + logger.warning("Unresolved resource " + serviceName + " found in " + toString(bundle)); + try { + bundle.start(); + } catch (BundleException e) { + logger.log(Level.SEVERE, e.getMessage(), e); + } + // urls = Collections.enumeration(Arrays.asList(entry)); + } + } + } catch (IOException e) { + logger.log(Level.SEVERE, e.getMessage(), e); + } + if (urls == null) { + continue; + } + while (urls.hasMoreElements()) { + final URL url = urls.nextElement(); + + if (debug) { + logger.fine("Reading service provider file: " + url.toExternalForm()); + } + try { + // Allow privileged access to open URL stream. Add FilePermission to added to security + // policy file. + InputStream is; + try { + is = AccessController.doPrivileged(new PrivilegedExceptionAction<InputStream>() { + public InputStream run() throws IOException { + return url.openStream(); + } + }); + } catch (PrivilegedActionException e) { + throw (IOException)e.getException(); + } + BufferedReader reader = null; + try { + reader = new BufferedReader(new InputStreamReader(is)); + int count = 0; + while (true) { + String line = reader.readLine(); + if (line == null) + break; + line = line.trim(); + if (!line.startsWith("#") && !"".equals(line)) { + String reg = line.trim(); + if (debug) { + logger.fine("Registering service provider: " + reg); + } + + Map<String, String> attributes = parseServiceDeclaration(reg); + String className = attributes.get("class"); + if (className == null) { + // Add a unique class name to prevent equals() from returning true + className = "_class_" + count; + count++; + } + ServiceDeclarationImpl descriptor = + new ServiceDeclarationImpl(bundle, url, className, attributes); + descriptors.add(descriptor); + } + } + } finally { + if (reader != null) { + try { + reader.close(); + } catch (IOException e) { + // Ignore + } + } + } + } catch (IOException e) { + logger.log(Level.SEVERE, e.getMessage(), e); + } + } + } + return descriptors; + } + +} diff --git a/java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java b/java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java new file mode 100644 index 0000000000..0c7eaec70b --- /dev/null +++ b/java/sca/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java @@ -0,0 +1,45 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility.equinox; + +import java.util.logging.Logger; + +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; +import org.osgi.framework.BundleActivator; +import org.osgi.framework.BundleContext; + +/** + * The Bundle Activator that creates the Equinox-based service discoverer + * + * @version $Rev$ $Date$ + */ +public class EquinoxServiceDiscoveryActivator implements BundleActivator { + private static Logger logger = Logger.getLogger(EquinoxServiceDiscoveryActivator.class.getName()); + + public void start(BundleContext context) throws Exception { + EquinoxServiceDiscoverer discoverer = new EquinoxServiceDiscoverer(context); + ServiceDiscovery.getInstance().setServiceDiscoverer(discoverer); + logger.info("Equinox-based service discoverer is now configured."); + } + + public void stop(BundleContext context) throws Exception { + } + +} diff --git a/java/sca/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxHostTestCase.java b/java/sca/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxHostTestCase.java new file mode 100644 index 0000000000..7602b02488 --- /dev/null +++ b/java/sca/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxHostTestCase.java @@ -0,0 +1,96 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility.equinox; + +import java.util.Dictionary; +import java.util.Enumeration; + +import junit.framework.Assert; + +import org.junit.Test; +import org.osgi.framework.Bundle; +import org.osgi.framework.BundleContext; + +/** + * Test start/stop the Equinox runtime. + * + * @version $Rev: $ $Date: $ + */ +public class EquinoxHostTestCase { + @Test + public void testStartThenStop() { + TestEquinoxHost host = new TestEquinoxHost(); + BundleContext context = host.start(); + Assert.assertNotNull(context); + for (Bundle b : context.getBundles()) { + System.out.println(toString(b, false)); + } + host.stop(); + } + + @Test + public void testStartTwice() { + TestEquinoxHost host = new TestEquinoxHost(); + host.start(); + try { + host.start(); + Assert.fail(); + } catch (IllegalStateException e) { + Assert.assertTrue(IllegalStateException.class.isInstance(e.getCause())); + } finally { + host.stop(); + } + } + + public static String toString(Bundle b, boolean verbose) { + StringBuffer sb = new StringBuffer(); + sb.append(b.getBundleId()).append(" ").append(b.getSymbolicName()); + int s = b.getState(); + if ((s & Bundle.UNINSTALLED) != 0) { + sb.append(" UNINSTALLED"); + } + if ((s & Bundle.INSTALLED) != 0) { + sb.append(" INSTALLED"); + } + if ((s & Bundle.RESOLVED) != 0) { + sb.append(" RESOLVED"); + } + if ((s & Bundle.STARTING) != 0) { + sb.append(" STARTING"); + } + if ((s & Bundle.STOPPING) != 0) { + sb.append(" STOPPING"); + } + if ((s & Bundle.ACTIVE) != 0) { + sb.append(" ACTIVE"); + } + + sb.append(" ").append(b.getLocation()); + if (verbose) { + Dictionary<Object, Object> dict = b.getHeaders(); + Enumeration<Object> keys = dict.keys(); + while (keys.hasMoreElements()) { + Object key = keys.nextElement(); + sb.append(" ").append(key).append("=").append(dict.get(key)); + } + } + return sb.toString(); + } +} diff --git a/java/sca/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscovererTestCase.java b/java/sca/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscovererTestCase.java new file mode 100644 index 0000000000..c21e4984f5 --- /dev/null +++ b/java/sca/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscovererTestCase.java @@ -0,0 +1,151 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility.equinox; + +import java.io.BufferedInputStream; +import java.io.File; +import java.io.FileInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.lang.reflect.Method; +import java.util.ArrayList; +import java.util.List; +import java.util.Set; +import java.util.jar.JarInputStream; +import java.util.jar.Manifest; + +import junit.framework.Assert; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.junit.AfterClass; +import org.junit.BeforeClass; +import org.junit.Test; +import org.osgi.framework.Bundle; +import org.osgi.framework.BundleContext; + +/** + * Test the Equinox service discoverer. + * + * @version $Rev$ $Date$ + */ +public class EquinoxServiceDiscovererTestCase { + private static EquinoxServiceDiscoverer discoverer; + private static Bundle testBundle; + private static TestEquinoxHost host; + + private static String getState(Bundle b) { + StringBuffer sb = new StringBuffer(); + int s = b.getState(); + if ((s & Bundle.UNINSTALLED) != 0) { + sb.append("UNINSTALLED "); + } + if ((s & Bundle.INSTALLED) != 0) { + sb.append("INSTALLED "); + } + if ((s & Bundle.RESOLVED) != 0) { + sb.append("RESOLVED "); + } + if ((s & Bundle.STARTING) != 0) { + sb.append("STARTING "); + } + if ((s & Bundle.STOPPING) != 0) { + sb.append("STOPPING "); + } + if ((s & Bundle.ACTIVE) != 0) { + sb.append("ACTIVE "); + } + return sb.toString(); + + } + + /** + * @throws java.lang.Exception + */ + @BeforeClass + public static void setUpBeforeClass() throws Exception { + host = new TestEquinoxHost(); + BundleContext context = host.start(); + + InputStream is = EquinoxServiceDiscovererTestCase.class.getResourceAsStream("/test-bundle.jar"); + testBundle = context.installBundle("test-bundle", is); + is.close(); + discoverer = new EquinoxServiceDiscoverer(context); + File dep = new File("target/bundles"); + List<Bundle> bundles = new ArrayList<Bundle>(); + for (File f : dep.listFiles()) { + BufferedInputStream bis = new BufferedInputStream(new FileInputStream(f)); + JarInputStream jis = new JarInputStream(bis); + Manifest manifest = jis.getManifest(); + if (manifest == null || manifest.getMainAttributes().getValue("Bundle-Name") == null) { + bis.close(); + continue; + } + bis.close(); + bis = new BufferedInputStream(new FileInputStream(f)); + Bundle b = context.installBundle(f.getName(), bis); + System.out.println("Installed "+b.getSymbolicName() + " [" + getState(b) + "]"); + bundles.add(b); + bis.close(); + } + for (Bundle b : bundles) { + b.start(); + System.out.println("Started "+b.getSymbolicName() + " [" + getState(b) + "]"); + // Get the Platform.getExtensionRegistry() + if ("org.eclipse.core.runtime".equals(b.getSymbolicName())) { + // The Platform class loaded by the bundle is different that the one + // on the classpath + Class<?> cls = b.loadClass("org.eclipse.core.runtime.Platform"); + Method m = cls.getMethod("getExtensionRegistry"); + Object reg = m.invoke(cls); + System.out.println(reg); + } + } + } + + /** + * @throws java.lang.Exception + */ + @AfterClass + public static void tearDownAfterClass() throws Exception { + if (testBundle != null) { + // Uninstall the bundle to clean up the cache + testBundle.uninstall(); + } + host.stop(); + } + + @Test + public void testDiscovery() throws IOException { + Set<ServiceDeclaration> descriptors = discoverer.getServiceDeclarations("test.TestService"); + Assert.assertEquals(1, descriptors.size()); + descriptors = discoverer.getServiceDeclarations("notthere"); + Assert.assertEquals(0, descriptors.size()); + } + + @Test + public void testDiscoveryFirst() throws IOException { + ServiceDeclaration descriptor = discoverer.getFirstServiceDeclaration("test.TestService"); + Assert.assertNotNull(descriptor); + descriptor = discoverer.getFirstServiceDeclaration("notthere"); + Assert.assertNull(descriptor); + } + + +} diff --git a/java/sca/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/TestEquinoxHost.java b/java/sca/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/TestEquinoxHost.java new file mode 100644 index 0000000000..e000faa447 --- /dev/null +++ b/java/sca/modules/extensibility-equinox/src/test/java/org/apache/tuscany/sca/extensibility/equinox/TestEquinoxHost.java @@ -0,0 +1,100 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility.equinox; + +import java.io.File; +import java.util.HashMap; +import java.util.Map; + +import org.eclipse.core.runtime.adaptor.EclipseStarter; +import org.eclipse.core.runtime.adaptor.LocationManager; +import org.osgi.framework.BundleContext; + +/** + * A test host that starts/stops Equinox. + * + * @version $Rev: $ $Date: $ + */ +public class TestEquinoxHost { + + private final static String systemPackages = + "org.osgi.framework; version=1.3.0," + "org.osgi.service.packageadmin; version=1.2.0, " + + "org.osgi.service.startlevel; version=1.0.0, " + + "org.osgi.service.url; version=1.0.0, " + + "org.osgi.util.tracker; version=1.3.2, " + + "javax.xml, " + + "javax.xml.datatype, " + + "javax.xml.namespace, " + + "javax.xml.parsers, " + + "javax.xml.transform, " + + "javax.xml.transform.dom, " + + "javax.xml.transform.sax, " + + "javax.xml.transform.stream, " + + "javax.xml.validation, " + + "javax.xml.xpath, " + // Force the classes to be imported from the system bundle + + "javax.xml.stream, " + + "javax.xml.stream.util, " + + "javax.sql," + + "org.w3c.dom, " + + "org.xml.sax, " + + "org.xml.sax.ext, " + + "org.xml.sax.helpers, " + + "javax.security.auth, " + + "javax.security.cert, " + + "javax.security.auth.login, " + + "javax.security.auth.callback, " + + "javax.naming, " + + "javax.naming.spi, " + + "javax.naming.directory, " + + "javax.management, " + + "javax.imageio, " + + "sun.misc, " + + "javax.net, " + + "javax.net.ssl, " + + "javax.crypto, " + + "javax.rmi, " + + "javax.transaction, " + + "javax.transaction.xa"; + + public BundleContext start() { + try { + Map<Object, Object> props = new HashMap<Object, Object>(); + props.put("org.osgi.framework.system.packages", systemPackages); + props.put(EclipseStarter.PROP_CLEAN, "true"); + props.put(LocationManager.PROP_INSTANCE_AREA, new File("target/workspace").toURI().toString()); + props.put(LocationManager.PROP_INSTALL_AREA, new File("target/eclipse").toURI().toString()); + EclipseStarter.setInitialProperties(props); + BundleContext context = EclipseStarter.startup(new String[]{}, null); + return context; + } catch (Exception e) { + throw new IllegalStateException(e); + } + } + + public void stop() { + try { + EclipseStarter.shutdown(); + } catch (Exception e) { + throw new IllegalStateException(e); + } + } + +} diff --git a/java/sca/modules/extensibility-equinox/src/test/resources/test-bundle.jar b/java/sca/modules/extensibility-equinox/src/test/resources/test-bundle.jar Binary files differnew file mode 100644 index 0000000000..afee051f61 --- /dev/null +++ b/java/sca/modules/extensibility-equinox/src/test/resources/test-bundle.jar diff --git a/java/sca/modules/extensibility/LICENSE b/java/sca/modules/extensibility/LICENSE new file mode 100644 index 0000000000..8aa906c321 --- /dev/null +++ b/java/sca/modules/extensibility/LICENSE @@ -0,0 +1,205 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. For the purposes of this definition, + "control" means (i) the power, direct or indirect, to cause the + direction or management of such entity, whether by contract or + otherwise, or (ii) ownership of fifty percent (50%) or more of the + outstanding shares, or (iii) beneficial ownership of such entity. + + "You" (or "Your") shall mean an individual or Legal Entity + exercising permissions granted by this License. + + "Source" form shall mean the preferred form for making modifications, + including but not limited to software source code, documentation + source, and configuration files. + + "Object" form shall mean any form resulting from mechanical + transformation or translation of a Source form, including but + not limited to compiled object code, generated documentation, + and conversions to other media types. + + "Work" shall mean the work of authorship, whether in Source or + Object form, made available under the License, as indicated by a + copyright notice that is included in or attached to the work + (an example is provided in the Appendix below). + + "Derivative Works" shall mean any work, whether in Source or Object + form, that is based on (or derived from) the Work and for which the + editorial revisions, annotations, elaborations, or other modifications + represent, as a whole, an original work of authorship. For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. For the purposes of this definition, "submitted" + means any form of electronic, verbal, or written communication sent + to the Licensor or its representatives, including but not limited to + communication on electronic mailing lists, source code control systems, + and issue tracking systems that are managed by, or on behalf of, the + Licensor for the purpose of discussing and improving the Work, but + excluding communication that is conspicuously marked or otherwise + designated in writing by the copyright owner as "Not a Contribution." + + "Contributor" shall mean Licensor and any individual or Legal Entity + on behalf of whom a Contribution has been received by Licensor and + subsequently incorporated within the Work. + + 2. Grant of Copyright License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + copyright license to reproduce, prepare Derivative Works of, + publicly display, publicly perform, sublicense, and distribute the + Work and such Derivative Works in Source or Object form. + + 3. Grant of Patent License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + (except as stated in this section) patent license to make, have made, + use, offer to sell, sell, import, and otherwise transfer the Work, + where such license applies only to those patent claims licensable + by such Contributor that are necessarily infringed by their + Contribution(s) alone or by combination of their Contribution(s) + with the Work to which such Contribution(s) was submitted. If You + institute patent litigation against any entity (including a + cross-claim or counterclaim in a lawsuit) alleging that the Work + or a Contribution incorporated within the Work constitutes direct + or contributory patent infringement, then any patent licenses + granted to You under this License for that Work shall terminate + as of the date such litigation is filed. + + 4. Redistribution. You may reproduce and distribute copies of the + Work or Derivative Works thereof in any medium, with or without + modifications, and in Source or Object form, provided that You + meet the following conditions: + + (a) You must give any other recipients of the Work or + Derivative Works a copy of this License; and + + (b) You must cause any modified files to carry prominent notices + stating that You changed the files; and + + (c) You must retain, in the Source form of any Derivative Works + that You distribute, all copyright, patent, trademark, and + attribution notices from the Source form of the Work, + excluding those notices that do not pertain to any part of + the Derivative Works; and + + (d) If the Work includes a "NOTICE" text file as part of its + distribution, then any Derivative Works that You distribute must + include a readable copy of the attribution notices contained + within such NOTICE file, excluding those notices that do not + pertain to any part of the Derivative Works, in at least one + of the following places: within a NOTICE text file distributed + as part of the Derivative Works; within the Source form or + documentation, if provided along with the Derivative Works; or, + within a display generated by the Derivative Works, if and + wherever such third-party notices normally appear. The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + + 5. Submission of Contributions. Unless You explicitly state otherwise, + any Contribution intentionally submitted for inclusion in the Work + by You to the Licensor shall be under the terms and conditions of + this License, without any additional terms or conditions. + Notwithstanding the above, nothing herein shall supersede or modify + the terms of any separate license agreement you may have executed + with Licensor regarding such Contributions. + + 6. Trademarks. This License does not grant permission to use the trade + names, trademarks, service marks, or product names of the Licensor, + except as required for reasonable and customary use in describing the + origin of the Work and reproducing the content of the NOTICE file. + + 7. Disclaimer of Warranty. Unless required by applicable law or + agreed to in writing, Licensor provides the Work (and each + Contributor provides its Contributions) on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied, including, without limitation, any warranties or conditions + of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A + PARTICULAR PURPOSE. You are solely responsible for determining the + appropriateness of using or redistributing the Work and assume any + risks associated with Your exercise of permissions under this License. + + 8. Limitation of Liability. In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS + + APPENDIX: How to apply the Apache License to your work. + + To apply the Apache License to your work, attach the following + boilerplate notice, with the fields enclosed by brackets "[]" + replaced with your own identifying information. (Don't include + the brackets!) The text should be enclosed in the appropriate + comment syntax for the file format. We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + + + diff --git a/java/sca/modules/extensibility/META-INF/MANIFEST.MF b/java/sca/modules/extensibility/META-INF/MANIFEST.MF new file mode 100644 index 0000000000..2cca0f0936 --- /dev/null +++ b/java/sca/modules/extensibility/META-INF/MANIFEST.MF @@ -0,0 +1,19 @@ +Manifest-Version: 1.0
+Export-Package: org.apache.tuscany.sca.core;uses:="org.apache.tuscany.
+ sca.extensibility";version="1.4",org.apache.tuscany.sca.extensibility
+ ;version="1.4"
+Tool: Bnd-0.0.255
+Bundle-Name: Apache Tuscany SCA Extensibility
+Created-By: 1.6.0_07 (Sun Microsystems Inc.)
+DynamicImport-Package: org.apache.tuscany.sca.extensibility.equinox
+Bundle-Vendor: The Apache Software Foundation
+Bundle-Version: 1.4
+Bnd-LastModified: 1225397079296
+Bundle-ManifestVersion: 2
+Bundle-License: http://www.apache.org/licenses/LICENSE-2.0.txt
+Bundle-Description: Apache Tuscany SCA Extensibility
+Import-Package: org.apache.tuscany.sca.core;version="1.4",
+ org.apache.tuscany.sca.extensibility;version="1.4"
+Bundle-SymbolicName: org.apache.tuscany.sca.extensibility
+Bundle-DocURL: http://www.apache.org/
+
diff --git a/java/sca/modules/extensibility/NOTICE b/java/sca/modules/extensibility/NOTICE new file mode 100644 index 0000000000..b3e4797aaa --- /dev/null +++ b/java/sca/modules/extensibility/NOTICE @@ -0,0 +1,5 @@ +Copyright (c) 2005 - 2008 The Apache Software Foundation + +This product includes software developed by +The Apache Software Foundation (http://www.apache.org/). + diff --git a/java/sca/modules/extensibility/pom.xml b/java/sca/modules/extensibility/pom.xml new file mode 100644 index 0000000000..35319afdfd --- /dev/null +++ b/java/sca/modules/extensibility/pom.xml @@ -0,0 +1,31 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!-- + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. +--> +<project> + <modelVersion>4.0.0</modelVersion> + <parent> + <groupId>org.apache.tuscany.sca</groupId> + <artifactId>tuscany-modules</artifactId> + <version>1.4-EQUINOX-SNAPSHOT</version> + <relativePath>../pom.xml</relativePath> + </parent> + <artifactId>tuscany-extensibility</artifactId> + <name>Apache Tuscany SCA Extensibility</name> + +</project> diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java new file mode 100644 index 0000000000..12979723b1 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultExtensionPointRegistry.java @@ -0,0 +1,186 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.core; + +import java.io.IOException; +import java.lang.reflect.Constructor; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Modifier; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; + +/** + * Default implementation of a registry to hold all the Tuscany core extension + * points. As the point of contact for all extension artifacts this registry + * allows loaded extensions to find all other parts of the system and register + * themselves appropriately. + * + * @version $Rev$ $Date$ + */ +public class DefaultExtensionPointRegistry implements ExtensionPointRegistry { + private Map<Class<?>, Object> extensionPoints = new HashMap<Class<?>, Object>(); + + /** + * Constructs a new registry. + */ + public DefaultExtensionPointRegistry() { + } + + /** + * Add an extension point to the registry. This default implementation + * stores extensions against the interfaces that they implement. + * + * @param extensionPoint The instance of the extension point + * + * @throws IllegalArgumentException if extensionPoint is null + */ + public void addExtensionPoint(Object extensionPoint) { + if (extensionPoint == null) { + throw new IllegalArgumentException("Cannot register null as an ExtensionPoint"); + } + + Set<Class<?>> interfaces = getAllInterfaces(extensionPoint.getClass()); + for (Class<?> i : interfaces) { + extensionPoints.put(i, extensionPoint); + } + } + + private Constructor<?> getConstructor(Constructor<?>[] constructors, Class<?>[] paramTypes) { + for (Constructor<?> c : constructors) { + Class<?>[] types = c.getParameterTypes(); + if (c.getParameterTypes().length == paramTypes.length) { + boolean found = true; + for (int i = 0; i < types.length; i++) { + if (types[i] != paramTypes[i]) { + found = false; + break; + } + } + if (found) { + return c; + } + } + } + return null; + } + + /** + * Get the extension point by the interface that it implements + * + * @param extensionPointType The lookup key (extension point interface) + * @return The instance of the extension point + * + * @throws IllegalArgumentException if extensionPointType is null + */ + public <T> T getExtensionPoint(Class<T> extensionPointType) { + if (extensionPointType == null) { + throw new IllegalArgumentException("Cannot lookup ExtensionPoint of type null"); + } + + Object extensionPoint = extensionPoints.get(extensionPointType); + if (extensionPoint == null) { + + // Dynamically load an extension point class declared under META-INF/services + try { + ServiceDeclaration extensionPointDeclaration = ServiceDiscovery.getInstance().getFirstServiceDeclaration(extensionPointType.getName()); + if (extensionPointDeclaration != null) { + Class<?> extensionPointClass = extensionPointDeclaration.loadClass(); + + // Construct the extension point + Constructor<?>[] constructors = extensionPointClass.getConstructors(); + Constructor<?> constructor = getConstructor(constructors, new Class<?>[] {ExtensionPointRegistry.class}); + if (constructor != null) { + extensionPoint = constructor.newInstance(this); + } else { + constructor = getConstructor(constructors, new Class<?>[] {}); + if (constructor != null) { + extensionPoint = constructor.newInstance(); + } else { + throw new IllegalArgumentException( + "No valid constructor is found for " + extensionPointClass); + } + } + + // Cache the loaded extension point + addExtensionPoint(extensionPoint); + } + } catch (InvocationTargetException e) { + throw new IllegalArgumentException(e); + } catch (IOException e) { + throw new IllegalArgumentException(e); + } catch (ClassNotFoundException e) { + throw new IllegalArgumentException(e); + } catch (InstantiationException e) { + throw new IllegalArgumentException(e); + } catch (IllegalAccessException e) { + throw new IllegalArgumentException(e); + } + } + return extensionPointType.cast(extensionPoint); + } + + /** + * Remove an extension point based on the interface that it implements + * + * @param extensionPoint The extension point to remove + * + * @throws IllegalArgumentException if extensionPoint is null + */ + public void removeExtensionPoint(Object extensionPoint) { + if (extensionPoint == null) { + throw new IllegalArgumentException("Cannot remove null as an ExtensionPoint"); + } + + Set<Class<?>> interfaces = getAllInterfaces(extensionPoint.getClass()); + for (Class<?> i : interfaces) { + extensionPoints.remove(i); + } + } + + /** + * Returns the set of interfaces implemented by the given class and its + * ancestors or a blank set if none + */ + private static Set<Class<?>> getAllInterfaces(Class<?> clazz) { + Set<Class<?>> implemented = new HashSet<Class<?>>(); + getAllInterfaces(clazz, implemented); + return implemented; + } + + private static void getAllInterfaces(Class<?> clazz, Set<Class<?>> implemented) { + Class<?>[] interfaces = clazz.getInterfaces(); + for (Class<?> interfaze : interfaces) { + if (Modifier.isPublic(interfaze.getModifiers())) { + implemented.add(interfaze); + } + } + Class<?> superClass = clazz.getSuperclass(); + // Object has no superclass so check for null + if (superClass != null && !superClass.equals(Object.class)) { + getAllInterfaces(superClass, implemented); + } + } + +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java new file mode 100644 index 0000000000..1bee91dcea --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java @@ -0,0 +1,172 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.core; + +import java.lang.reflect.Constructor; +import java.lang.reflect.Method; +import java.lang.reflect.Modifier; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.util.HashMap; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; + + + +/** + * Default implementation of a model factory extension point. + * + * @version $Rev$ $Date$ + */ +public class DefaultFactoryExtensionPoint implements FactoryExtensionPoint { + private ExtensionPointRegistry extensionPointRegistry; + private HashMap<Class<?>, Object> factories = new HashMap<Class<?>, Object>(); + + /** + * Constructs a new DefaultModelFactoryExtensionPoint. + */ + public DefaultFactoryExtensionPoint(ExtensionPointRegistry extensionPointRegistry) { + this.extensionPointRegistry = extensionPointRegistry; + } + + /** + * Add a model factory extension. + * + * @param factory The factory to add + */ + public void addFactory(Object factory) { + Class<?>[] interfaces = factory.getClass().getInterfaces(); + if (interfaces.length == 0) { + Class<?> sc = factory.getClass().getSuperclass(); + if (sc != Object.class) { + factories.put(sc, factory); + } + } else { + for (int i = 0; i<interfaces.length; i++) { + factories.put(interfaces[i], factory); + } + } + } + + /** + * Remove a model factory. + * + * @param factory The factory to remove + */ + public void removeFactory(Object factory) { + Class<?>[] interfaces = factory.getClass().getInterfaces(); + if (interfaces.length == 0) { + Class<?> sc = factory.getClass().getSuperclass(); + if (sc != Object.class) { + factories.remove(sc); + } + } else { + for (int i = 0; i<interfaces.length; i++) { + factories.remove(interfaces[i]); + } + } + } + + private ClassLoader setContextClassLoader(final ClassLoader classLoader) { + return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() { + public ClassLoader run() { + ClassLoader tccl = Thread.currentThread().getContextClassLoader(); + Thread.currentThread().setContextClassLoader(classLoader); + return tccl; + } + }); + } + + /** + * Get a factory implementing the given interface. + * @param factoryInterface The lookup key (factory interface) + * @return The factory + */ + public <T> T getFactory(Class<T> factoryInterface) { + Object factory = factories.get(factoryInterface); + if (factory == null) { + + // Dynamically load a factory class declared under META-INF/services + try { + ServiceDeclaration factoryDeclaration = + ServiceDiscovery.getInstance().getFirstServiceDeclaration(factoryInterface.getName()); + if (factoryDeclaration != null) { + Class<?> factoryClass = factoryDeclaration.loadClass(); + try { + + // Default empty constructor + Constructor<?> constructor = factoryClass.getConstructor(); + factory = constructor.newInstance(); + } catch (NoSuchMethodException e) { + try { + + // Constructor taking the model factory extension point + Constructor<?> constructor = factoryClass.getConstructor(FactoryExtensionPoint.class); + factory = constructor.newInstance(this); + } catch (NoSuchMethodException e1) { + + // Constructor taking the extension point registry + Constructor<?> constructor = factoryClass.getConstructor(ExtensionPointRegistry.class); + factory = constructor.newInstance(extensionPointRegistry); + } + } + + // Cache the loaded factory + factories.put(factoryInterface, factory); + + return factoryInterface.cast(factory); + + } else { + + // If the input interface is an abstract class + if (!factoryInterface.isInterface() && Modifier.isAbstract(factoryInterface.getModifiers())) { + Method newInstanceMethod = factoryInterface.getDeclaredMethod("newInstance"); + ClassLoader tccl = setContextClassLoader(factoryInterface.getClassLoader()); + try { + + // Create a new instance + factory = newInstanceMethod.invoke(null); + + // Cache the factory + factories.put(factoryInterface, factory); + + return factoryInterface.cast(factory); + } catch (Exception e) { + // Sorry no factory found + return null; + } finally { + setContextClassLoader(tccl); + } + } else { + + // Sorry no factory found + return null; + } + } + } catch (Exception e) { + throw new IllegalArgumentException(e); + } + } else { + return factoryInterface.cast(factory); + } + } + +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java new file mode 100644 index 0000000000..d84f28f11e --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultModuleActivatorExtensionPoint.java @@ -0,0 +1,92 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.core; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.Set; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; + +/** + * Default implementation of an extension point to hold Tuscany module activators. + * + * @version $Rev$ $Date$ + */ +public class DefaultModuleActivatorExtensionPoint implements ModuleActivatorExtensionPoint { + private List<ModuleActivator> activators = new ArrayList<ModuleActivator>(); + private boolean loadedActivators; + + /** + * Constructs a new extension point. + */ + public DefaultModuleActivatorExtensionPoint() { + } + + public void addModuleActivator(ModuleActivator activator) { + activators.add(activator); + } + + public List<ModuleActivator> getModuleActivators() { + loadModuleActivators(); + return activators; + } + + public void removeModuleActivator(Object activator) { + activators.remove(activator); + } + + /** + * Dynamically load module activators declared under META-INF/services + */ + private void loadModuleActivators() { + if (loadedActivators) + return; + + // Get the activator service declarations + Set<ServiceDeclaration> activatorDeclarations; + try { + activatorDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations(ModuleActivator.class.getName()); + } catch (IOException e) { + throw new IllegalStateException(e); + } + + // Load and instantiate module activators + for (ServiceDeclaration activatorDeclaration: activatorDeclarations) { + ModuleActivator activator; + try { + Class<ModuleActivator> activatorClass = (Class<ModuleActivator>)activatorDeclaration.loadClass(); + activator = activatorClass.newInstance(); + } catch (ClassNotFoundException e) { + throw new IllegalArgumentException(e); + } catch (InstantiationException e) { + throw new IllegalArgumentException(e); + } catch (IllegalAccessException e) { + throw new IllegalArgumentException(e); + } + addModuleActivator(activator); + } + + loadedActivators = true; + } + +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java new file mode 100644 index 0000000000..9906bef909 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultUtilityExtensionPoint.java @@ -0,0 +1,186 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.core; + +import java.io.IOException; +import java.lang.reflect.Constructor; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Modifier; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Set; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; + +/** + * Default implementation of an extension point to hold Tuscany utility utilities. + * + * @version $Rev$ $Date$ + */ +public class DefaultUtilityExtensionPoint implements UtilityExtensionPoint { + private Map<Class<?>, Object> utilities = new HashMap<Class<?>, Object>(); + + private ExtensionPointRegistry extensionPoints; + + /** + * Constructs a new extension point. + */ + public DefaultUtilityExtensionPoint(ExtensionPointRegistry extensionPoints) { + this.extensionPoints = extensionPoints; + } + + /** + * Add a utility to the extension point. This default implementation + * stores utilities against the interfaces that they implement. + * + * @param utility The instance of the utility + * + * @throws IllegalArgumentException if utility is null + */ + public void addUtility(Object utility) { + if (utility == null) { + throw new IllegalArgumentException("Cannot register null as a Service"); + } + + Set<Class<?>> interfaces = getAllInterfaces(utility.getClass()); + for (Class<?> i : interfaces) { + utilities.put(i, utility); + } + } + + private Constructor<?> getConstructor(Constructor<?>[] constructors, Class<?>[] paramTypes) { + for (Constructor<?> c : constructors) { + Class<?>[] types = c.getParameterTypes(); + if (c.getParameterTypes().length == paramTypes.length) { + boolean found = true; + for (int i = 0; i < types.length; i++) { + if (types[i] != paramTypes[i]) { + found = false; + break; + } + } + if (found) { + return c; + } + } + } + return null; + } + + /** + * Get the utility by the interface that it implements + * + * @param utilityType The lookup key (utility interface) + * @return The instance of the utility + * + * @throws IllegalArgumentException if utilityType is null + */ + public <T> T getUtility(Class<T> utilityType) { + if (utilityType == null) { + throw new IllegalArgumentException("Cannot lookup Service of type null"); + } + + Object utility = utilities.get(utilityType); + if (utility == null) { + + // Dynamically load a utility class declared under META-INF/utilities + try { + ServiceDeclaration utilityDeclaration =ServiceDiscovery.getInstance().getFirstServiceDeclaration(utilityType.getName()); + if (utilityDeclaration != null) { + Class<?> utilityClass = utilityDeclaration.loadClass(); + + // Construct the utility + Constructor<?>[] constructors = utilityClass.getConstructors(); + Constructor<?> constructor = getConstructor(constructors, new Class<?>[] {ExtensionPointRegistry.class}); + if (constructor != null) { + utility = constructor.newInstance(extensionPoints); + } else { + constructor = getConstructor(constructors, new Class<?>[] {}); + if (constructor != null) { + utility = constructor.newInstance(); + } else { + throw new IllegalArgumentException( + "No valid constructor is found for " + utilityClass); + } + } + + // Cache the loaded utility + addUtility(utility); + } + } catch (InvocationTargetException e) { + throw new IllegalArgumentException(e); + } catch (IOException e) { + throw new IllegalArgumentException(e); + } catch (ClassNotFoundException e) { + throw new IllegalArgumentException(e); + } catch (InstantiationException e) { + throw new IllegalArgumentException(e); + } catch (IllegalAccessException e) { + throw new IllegalArgumentException(e); + } + } + return utilityType.cast(utility); + } + + /** + * Remove a utility based on the interface that it implements + * + * @param utility The utility to remove + * + * @throws IllegalArgumentException if utility is null + */ + public void removeUtility(Object utility) { + if (utility == null) { + throw new IllegalArgumentException("Cannot remove null as a Service"); + } + + Set<Class<?>> interfaces = getAllInterfaces(utility.getClass()); + for (Class<?> i : interfaces) { + utilities.remove(i); + } + } + + /** + * Returns the set of interfaces implemented by the given class and its + * ancestors or a blank set if none + */ + private static Set<Class<?>> getAllInterfaces(Class<?> clazz) { + Set<Class<?>> implemented = new HashSet<Class<?>>(); + getAllInterfaces(clazz, implemented); + return implemented; + } + + private static void getAllInterfaces(Class<?> clazz, Set<Class<?>> implemented) { + Class<?>[] interfaces = clazz.getInterfaces(); + for (Class<?> interfaze : interfaces) { + if (Modifier.isPublic(interfaze.getModifiers())) { + implemented.add(interfaze); + } + } + Class<?> superClass = clazz.getSuperclass(); + // Object has no superclass so check for null + if (superClass != null && !superClass.equals(Object.class)) { + getAllInterfaces(superClass, implemented); + } + } + +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java new file mode 100644 index 0000000000..f2f67b2d52 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ExtensionPointRegistry.java @@ -0,0 +1,56 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.core; + + +/** + * The registry for the Tuscany core extension points. As the point of contact + * for all extension artifacts this registry allows loaded extensions to find + * all other parts of the system and register themselves appropriately. + * + * @version $Rev$ $Date$ + */ +public interface ExtensionPointRegistry { + + /** + * Add an extension point to the registry + * @param extensionPoint The instance of the extension point + * + * @throws IllegalArgumentException if extensionPoint is null + */ + void addExtensionPoint(Object extensionPoint); + + /** + * Get the extension point by the interface + * @param extensionPointType The lookup key (extension point interface) + * @return The instance of the extension point + * + * @throws IllegalArgumentException if extensionPointType is null + */ + <T> T getExtensionPoint(Class<T> extensionPointType); + + /** + * Remove an extension point + * @param extensionPoint The extension point to remove + * + * @throws IllegalArgumentException if extensionPoint is null + */ + void removeExtensionPoint(Object extensionPoint); +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/FactoryExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/FactoryExtensionPoint.java new file mode 100644 index 0000000000..4d38cb8afe --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/FactoryExtensionPoint.java @@ -0,0 +1,54 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.core; + +/** + * An extension point for model factories. Model factories are provided to + * abstract the classes that represent artifacts in the assembly model away + * from their creation mechanism. When the runtime needs to extend the model + * as it reads in contributed artifacts it looks up the factory for the + * artifact required in this registry + * + * @version $Rev$ $Date$ + */ +public interface FactoryExtensionPoint { + + /** + * Add a model factory extension. + * + * @param factory The factory to add + */ + void addFactory(Object factory); + + /** + * Remove a model factory extension. + * + * @param factory The factory to remove + */ + void removeFactory(Object factory); + + /** + * Get a factory implementing the given interface. + * @param factoryInterface the lookup key (factory interface) + * @return The factory + */ + <T> T getFactory(Class<T> factoryInterface); + +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java new file mode 100644 index 0000000000..dbfd0dcd90 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java @@ -0,0 +1,60 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.core; + + +/** + * ModuleActivator represents a module that plugs into the Tuscany system. Each + * module should provide an implementation of this interface and register the + * ModuleActivator implementation class by defining a file named + * + * "META-INF/services/org.apache.tuscany.core.ModuleActivator" + * + * The content of the file is the class name of the ModuleActivator implementation. + * The implementation class must have a no-arg constructor. The same instance + * will be used to invoke all the methods during different phases of the module + * activation. Note that the start and stop methods defined by this interface + * take a reference to the Tuscany SCA runtime ExtensionPointRegistry. This + * gives the ModuleActivator the opportunity to add extension points to the + * registry as it is requested to start up and remove them when it is requested + * to shut down. + * + * @version $Rev$ $Date$ + */ +public interface ModuleActivator { + + /** + * This method is invoked when the module is started by the Tuscany system. + * It can be used by this module to register extensions against extension + * points. + * + * @param registry The extension point registry + */ + void start(ExtensionPointRegistry registry); + + /** + * This method is invoked when the module is stopped by the Tuscany system. + * It can be used by this module to unregister extensions against the + * extension points. + * + * @param registry The extension point registry + */ + void stop(ExtensionPointRegistry registry); +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivatorExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivatorExtensionPoint.java new file mode 100644 index 0000000000..ec0f12b8ba --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivatorExtensionPoint.java @@ -0,0 +1,53 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.core; + +import java.util.List; + + +/** + * The extension point for the Tuscany module activator extensions. + * + * @version $Rev$ $Date$ + */ +public interface ModuleActivatorExtensionPoint { + + /** + * Add a module activator extension to the extension point + * @param activator The instance of the module activator + * + * @throws IllegalArgumentException if activator is null + */ + void addModuleActivator(ModuleActivator activator); + + /** + * Returns the module activator extensions. + * @return The module activator extensions + */ + List<ModuleActivator> getModuleActivators(); + + /** + * Remove a module activator + * @param activator The module activator to remove + * + * @throws IllegalArgumentException if activator is null + */ + void removeModuleActivator(Object activator); +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java new file mode 100644 index 0000000000..6b14b95666 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/UtilityExtensionPoint.java @@ -0,0 +1,54 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.core; + + +/** + * The extension point for the Tuscany core utility extensions. + * + * @version $Rev$ $Date$ + */ +public interface UtilityExtensionPoint { + + /** + * Add a utility to the extension point + * @param utility The instance of the utility + * + * @throws IllegalArgumentException if utility is null + */ + void addUtility(Object utility); + + /** + * Get the utility by the interface + * @param utilityType The lookup key (utility interface) + * @return The instance of the utility + * + * @throws IllegalArgumentException if utilityType is null + */ + <T> T getUtility(Class<T> utilityType); + + /** + * Remove a utility + * @param utility The utility to remove + * + * @throws IllegalArgumentException if utility is null + */ + void removeUtility(Object utility); +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java new file mode 100644 index 0000000000..7d9dc0e9ef --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscoverer.java @@ -0,0 +1,244 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility; + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.InputStream; +import java.io.InputStreamReader; +import java.lang.ref.WeakReference; +import java.net.URL; +import java.net.URLConnection; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.security.PrivilegedActionException; +import java.security.PrivilegedExceptionAction; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.StringTokenizer; +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * A ServiceDiscoverer that find META-INF/services/... using the Context ClassLoader. + * + * @version $Rev$ $Date$ + */ +public class ContextClassLoaderServiceDiscoverer implements ServiceDiscoverer { + private static final Logger logger = Logger.getLogger(ContextClassLoaderServiceDiscoverer.class.getName()); + + public class ServiceDeclarationImpl implements ServiceDeclaration { + private URL url; + private String className; + private Class<?> javaClass; + private Map<String, String> attributes; + + public ServiceDeclarationImpl(URL url, String className, Map<String, String> attributes) { + super(); + this.url = url; + this.className = className; + this.attributes = attributes; + } + + public Map<String, String> getAttributes() { + return attributes; + } + + public String getClassName() { + return className; + } + + public URL getLocation() { + return url; + } + + public Class<?> loadClass() throws ClassNotFoundException { + if (className == null) { + return null; + } + if (javaClass == null) { + javaClass = loadClass(className); + } + return javaClass; + } + + public Class<?> loadClass(String className) throws ClassNotFoundException { + return Class.forName(className, false, classLoaderReference.get()); + } + + public String toString() { + StringBuffer sb = new StringBuffer(); + sb.append("ClassLoader: ").append(classLoaderReference.get()); + sb.append(" Attributes: ").append(attributes); + return sb.toString(); + } + + public URL getResource(final String name) { + return AccessController.doPrivileged(new PrivilegedAction<URL>() { + public URL run() { + return classLoaderReference.get().getResource(name); + } + }); + } + + } + + private WeakReference<ClassLoader> classLoaderReference; + + public ContextClassLoaderServiceDiscoverer() { + ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); + this.classLoaderReference = new WeakReference<ClassLoader>(classLoader); + } + + private List<URL> getResources(final String name) throws IOException { + try { + return AccessController.doPrivileged(new PrivilegedExceptionAction<List<URL>>() { + public List<URL> run() throws IOException { + List<URL> urls = Collections.list(classLoaderReference.get().getResources(name)); + return urls; + } + }); + } catch (PrivilegedActionException e) { + throw (IOException)e.getException(); + } + } + + /** + * Parse a service declaration in the form class;attr=value,attr=value and + * return a map of attributes + * + * @param declaration + * @return a map of attributes + */ + private static Map<String, String> parseServiceDeclaration(String declaration) { + Map<String, String> attributes = new HashMap<String, String>(); + int index = declaration.indexOf(';'); + if (index != -1) { + attributes.put("class", declaration.substring(0, index).trim()); + declaration = declaration.substring(index); + } else { + int j = declaration.indexOf('='); + if (j == -1) { + attributes.put("class", declaration.trim()); + return attributes; + } else { + declaration = ";" + declaration; + } + } + StringTokenizer tokens = new StringTokenizer(declaration); + for (; tokens.hasMoreTokens();) { + String key = tokens.nextToken("=").substring(1).trim(); + if (key == null) + break; + String value = tokens.nextToken(",").substring(1).trim(); + if (value == null) + break; + attributes.put(key, value); + } + return attributes; + } + + public ServiceDeclaration getFirstServiceDeclaration(String name) throws IOException { + Set<ServiceDeclaration> declarations = getServiceDeclarations(name); + if (declarations.isEmpty()) { + return null; + } else { + return declarations.iterator().next(); + } + } + + public Set<ServiceDeclaration> getServiceDeclarations(String serviceName) { + Set<ServiceDeclaration> descriptors = new HashSet<ServiceDeclaration>(); + + String name = "META-INF/services/" + serviceName; + boolean debug = logger.isLoggable(Level.FINE); + try { + for (final URL url : getResources(name)) { + if (debug) { + logger.fine("Reading service provider file: " + url.toExternalForm()); + } + + // Allow privileged access to open URL stream. Add FilePermission to added to security + // policy file. + InputStream is; + try { + is = AccessController.doPrivileged(new PrivilegedExceptionAction<InputStream>() { + public InputStream run() throws IOException { + URLConnection connection = url.openConnection(); + // TUSCANY-2539 + // Don't cache connections by default to stop Tuscany locking contribution jar files + // done here as this is one of the first places we open a stream and the only way to + // set the default is to set it on an instance of URLConnection + connection.setDefaultUseCaches(false); + connection.setUseCaches(false); + return url.openStream(); + } + }); + } catch (PrivilegedActionException e) { + throw (IOException)e.getException(); + } + BufferedReader reader = null; + try { + reader = new BufferedReader(new InputStreamReader(is)); + int count = 0; + while (true) { + String line = reader.readLine(); + if (line == null) + break; + line = line.trim(); + if (!line.startsWith("#") && !"".equals(line)) { + String reg = line.trim(); + if (debug) { + logger.fine("Registering service provider: " + reg); + } + + Map<String, String> attributes = parseServiceDeclaration(reg); + String className = attributes.get("class"); + if (className == null) { + // Add a unique class name to prevent equals() from returning true + className = "_class_" + count; + count++; + } + ServiceDeclarationImpl descriptor = new ServiceDeclarationImpl(url, className, attributes); + descriptors.add(descriptor); + } + } + } finally { + if (reader != null) { + try { + reader.close(); + } catch (IOException e) { + // Ignore + } + } + } + } + } catch (IOException e) { + logger.log(Level.SEVERE, e.getMessage(), e); + } + return descriptors; + + } + +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java new file mode 100644 index 0000000000..d7ac8b449f --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDeclaration.java @@ -0,0 +1,70 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility; + +import java.net.URL; +import java.util.Map; + +/** + * Service declaration using J2SE Jar service provider spec Classes specified + * inside this declaration are loaded using the ClassLoader used to read the + * configuration file corresponding to this declaration. + * + * @version $Rev$ $Date$ + */ +public interface ServiceDeclaration { + /** + * Load a java class in the same context as the service definition + * @param className The class name + * @return The loaded class + * @throws ClassNotFoundException + */ + Class<?> loadClass(String className) throws ClassNotFoundException; + + /** + * Get the java class for the service impl + * @return The java class + */ + Class<?> loadClass() throws ClassNotFoundException; + + /** + * Get all attributes (name=value pairs) defined for the given entry + * @return All attributes keyed by name + */ + Map<String, String> getAttributes(); + + URL getLocation(); + + String getClassName(); + + URL getResource(String name); + + /** + * The service descriptor might be hashed + * @param obj Another object + * @return + */ + boolean equals(Object obj); + /** + * The service descriptor might be hashed + * @return + */ + int hashCode(); +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscoverer.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscoverer.java new file mode 100644 index 0000000000..f89a25d199 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscoverer.java @@ -0,0 +1,50 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility; + +import java.io.IOException; +import java.lang.reflect.InvocationTargetException; +import java.util.Set; + +/** + * A SPI that allows different implementations of discovering service declarations + */ +public interface ServiceDiscoverer { + + /** + * Get all service declarations for this interface + * + * @param name + * @return set of service declarations + * @throws IOException + */ + public Set<ServiceDeclaration> getServiceDeclarations(String name) throws IOException; + + /** + * Get first service declaration class for the given interface + * + * @param name + * @return service implementation class + * @throws IOException + * @throws ClassNotFoundException + */ + public ServiceDeclaration getFirstServiceDeclaration(String name) throws IOException; + +} diff --git a/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java new file mode 100644 index 0000000000..10270a0086 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/ServiceDiscovery.java @@ -0,0 +1,87 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility; + +import java.io.IOException; +import java.util.Set; +import java.util.logging.Logger; + +/** + * Service discovery for Tuscany based on J2SE Jar service provider spec. + * Services are described using configuration files in META-INF/services. + * Service description specifies a class name followed by optional properties. + * + * + * @version $Rev$ $Date$ + */ +public class ServiceDiscovery implements ServiceDiscoverer { + private static final Logger logger = Logger.getLogger(ServiceDiscovery.class.getName()); + + private final static ServiceDiscovery INSTANCE = new ServiceDiscovery(); + + private ServiceDiscoverer discoverer; + + private ServiceDiscovery() { + super(); + } + /** + * Get an instance of Service discovery, one instance is created per + * ClassLoader that this class is loaded from + * + * @return + */ + public static ServiceDiscovery getInstance() { + return INSTANCE; + } + + public ServiceDiscoverer getServiceDiscoverer() { + if (discoverer != null) { + return discoverer; + } + try { + //FIXME Remove that upside-down dependency + Class.forName("org.apache.tuscany.sca.extensibility.equinox.EquinoxServiceDiscoverer"); + if (discoverer != null) { + return discoverer; + } + } catch (Throwable e) { + } + discoverer = new ContextClassLoaderServiceDiscoverer(); + return discoverer; + } + + public void setServiceDiscoverer(ServiceDiscoverer sd) { + if (discoverer != null) { + throw new IllegalStateException("The ServiceDiscoverer cannot be reset"); + } + discoverer = sd; + } + + public Set<ServiceDeclaration> getServiceDeclarations(String name) throws IOException { + Set<ServiceDeclaration> services = getServiceDiscoverer().getServiceDeclarations(name); + return services; + } + + public ServiceDeclaration getFirstServiceDeclaration(final String name) throws IOException { + ServiceDeclaration service = getServiceDiscoverer().getFirstServiceDeclaration(name); + return service; + } + +} diff --git a/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.FactoryExtensionPoint b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.FactoryExtensionPoint new file mode 100644 index 0000000000..3c135aa267 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.FactoryExtensionPoint @@ -0,0 +1,18 @@ +# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+org.apache.tuscany.sca.core.DefaultFactoryExtensionPoint
diff --git a/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint new file mode 100644 index 0000000000..42bad63132 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint @@ -0,0 +1,18 @@ +# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+org.apache.tuscany.sca.core.DefaultModuleActivatorExtensionPoint
diff --git a/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.UtilityExtensionPoint b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.UtilityExtensionPoint new file mode 100644 index 0000000000..d769bad283 --- /dev/null +++ b/java/sca/modules/extensibility/src/main/resources/META-INF/services/org.apache.tuscany.sca.core.UtilityExtensionPoint @@ -0,0 +1,18 @@ +# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+org.apache.tuscany.sca.core.DefaultUtilityExtensionPoint
diff --git a/java/sca/modules/extensibility/src/test/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscovererTestCase.java b/java/sca/modules/extensibility/src/test/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscovererTestCase.java new file mode 100644 index 0000000000..4c965420ca --- /dev/null +++ b/java/sca/modules/extensibility/src/test/java/org/apache/tuscany/sca/extensibility/ContextClassLoaderServiceDiscovererTestCase.java @@ -0,0 +1,72 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.extensibility; + +import java.io.IOException; +import java.util.Set; + +import junit.framework.Assert; + +import org.junit.AfterClass; +import org.junit.BeforeClass; +import org.junit.Test; + +/** + * Test Case for ClasspathServiceDiscover + */ +public class ContextClassLoaderServiceDiscovererTestCase { + private static ContextClassLoaderServiceDiscoverer discover; + + /** + * @throws java.lang.Exception + */ + @BeforeClass + public static void setUpBeforeClass() throws Exception { + discover = new ContextClassLoaderServiceDiscoverer(); + } + + @Test + public void testDiscovery() { + Set<ServiceDeclaration> discriptors = + discover.getServiceDeclarations("org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint"); + Assert.assertEquals(1, discriptors.size()); + discriptors = + discover.getServiceDeclarations("notthere"); + Assert.assertEquals(0, discriptors.size()); + } + + @Test + public void testDiscoveryFirst() throws IOException { + ServiceDeclaration descriptor = + discover.getFirstServiceDeclaration("org.apache.tuscany.sca.core.ModuleActivatorExtensionPoint"); + Assert.assertNotNull(descriptor); + descriptor = discover.getFirstServiceDeclaration("notthere"); + Assert.assertNull(descriptor); + } + + + /** + * @throws java.lang.Exception + */ + @AfterClass + public static void tearDownAfterClass() throws Exception { + } + +} |