Copy modules for event prototype

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@705212 13f79535-47bb-0310-9956-ffa450edef68

7 files changed, 804 insertions, 0 deletions

diff --git a/sandbox/event/modules/extensibility-osgi/LICENSE b/sandbox/event/modules/extensibility-osgi/LICENSE
new file mode 100644
index 0000000000..6e529a25c4
--- /dev/null
+++ b/sandbox/event/modules/extensibility-osgi/LICENSE
@@ -0,0 +1,205 @@
+

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+                           Version 2.0, January 2004

+                        http://www.apache.org/licenses/

+

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+      meet the following conditions:

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+      (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

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+

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+      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

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diff --git a/sandbox/event/modules/extensibility-osgi/NOTICE b/sandbox/event/modules/extensibility-osgi/NOTICE
new file mode 100644
index 0000000000..65c52d01c7
--- /dev/null
+++ b/sandbox/event/modules/extensibility-osgi/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/sandbox/event/modules/extensibility-osgi/pom.xml b/sandbox/event/modules/extensibility-osgi/pom.xml
new file mode 100644
index 0000000000..7667ca918f
--- /dev/null
+++ b/sandbox/event/modules/extensibility-osgi/pom.xml
@@ -0,0 +1,67 @@
+<?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-SNAPSHOT</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+	<artifactId>tuscany-extensibility-osgi</artifactId>
+	<name>Apache Tuscany SCA Extensibility for OSGi</name>
+	<dependencies>
+		<dependency>
+			<groupId>org.apache.tuscany.sca</groupId>
+			<artifactId>tuscany-extensibility</artifactId>
+			<version>1.4-SNAPSHOT</version>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.felix</groupId>
+			<artifactId>org.osgi.core</artifactId>
+			<version>1.0.1</version>
+            <scope>provided</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.apache.felix</groupId>
+			<artifactId>org.apache.felix.framework</artifactId>
+			<version>1.0.4</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.felix</groupId>
+				<artifactId>maven-bundle-plugin</artifactId>
+				<configuration>
+					<instructions>
+						<Bundle-Version>${tuscany.version}</Bundle-Version>
+						<Bundle-SymbolicName>org.apache.tuscany.sca.extensibility.osgi</Bundle-SymbolicName>
+						<Bundle-Description>${pom.name}</Bundle-Description>
+                        <Bundle-Activator>org.apache.tuscany.sca.extensibility.osgi.OSGiServiceDiscoveryActivator</Bundle-Activator>
+                        <!-- This bundle will be the gateway to all exported packages -->
+                        <DynamicImport-Package>*</DynamicImport-Package>
+					</instructions>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+</project>
diff --git a/sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoverer.java b/sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoverer.java
new file mode 100644
index 0000000000..a536684b2e
--- /dev/null
+++ b/sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoverer.java
@@ -0,0 +1,359 @@
+/*
+ * 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.osgi;
+
+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.security.SecureClassLoader;
+import java.util.Collections;
+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;
+
+/**
+ * The ServiceDiscoverer that find META-INF/services/... in installed bundles
+ */
+public class OSGiServiceDiscoverer implements ServiceDiscoverer {
+    private static final Logger logger = Logger.getLogger(OSGiServiceDiscoverer.class.getName());
+    private BundleContext context;
+    private ClassLoader classLoader;
+
+    public OSGiServiceDiscoverer(BundleContext context) {
+        this.context = context;
+        this.classLoader = new ClassLoaderImpl();
+    }
+
+    /**
+     * This class loader provides resource access to META-INF/services/... which is used by
+     * many frameworks. OSGi Import-Package and DynmaicImport-Package headers do not support
+     * split packages. Another option is to use Require-Bundle header. We can collect the list
+     * of bundles and add them as required bundles to a special gateway bundle.
+     */
+    public class ClassLoaderImpl extends SecureClassLoader {
+
+        public ClassLoaderImpl() {
+            super(OSGiServiceDiscoverer.class.getClassLoader());
+        }
+
+        /**
+         * Open a back-door to expose the META-INF/services resources
+         */
+        @Override
+        protected URL findResource(String name) {
+            int index = name.lastIndexOf('/');
+            if (index == -1) {
+                return null;
+            }
+            String path = name.substring(0, index);
+            if (path.startsWith("/")) {
+                path = path.substring(1);
+            }
+
+            if (!path.startsWith("META-INF/services")) {
+                return null;
+            }
+
+            for (Bundle bundle : context.getBundles()) {
+                URL url = bundle.getEntry(name);
+                if (url != null) {
+                    return url;
+                }
+            }
+
+            return null;
+        }
+
+        /**
+         * Open a back-door to expose the META-INF/services resources
+         */
+        @Override
+        protected Enumeration<URL> findResources(String name) throws IOException {
+            int index = name.lastIndexOf('/');
+            if (index == -1) {
+                return null;
+            }
+            String path = name.substring(0, index);
+            String file = name.substring(index + 1);
+            if (path.startsWith("/")) {
+                path = path.substring(1);
+            }
+
+            if (!path.startsWith("META-INF/services")) {
+                return null;
+            }
+
+            Set<URL> urlSet = new HashSet<URL>();
+
+            for (Bundle bundle : context.getBundles()) {
+                Enumeration<URL> urls = bundle.findEntries(path, file, false);
+                if (urls != null) {
+                    urlSet.addAll(Collections.list(urls));
+                }
+            }
+            return Collections.enumeration(urlSet);
+        }
+
+    }
+
+    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 {
+            try {
+                return bundle.loadClass(className);
+            } catch (ClassNotFoundException e) {
+                logger.severe(e.getMessage() + ": " + OSGiServiceDiscoverer.toString(bundle));
+                throw e;
+            }
+        }
+
+        public URL getLocation() {
+            return url;
+        }
+
+        public URL getResource(final String name) {
+            return AccessController.doPrivileged(new PrivilegedAction<URL>() {
+                public URL run() {
+                    return bundle.getResource(name);
+                }
+            });
+        }
+
+        @Override
+        public String toString() {
+            StringBuffer sb = new StringBuffer();
+            sb.append("Bundle: ").append(OSGiServiceDiscoverer.toString(bundle));
+            sb.append(" Resource: ").append(url);
+            sb.append(" Attributes: ").append(attributes);
+            return sb.toString();
+        }
+
+    }
+
+    public 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
+     */
+    protected 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 BundleContext getBundleContext() {
+        return context;
+    }
+
+    /**
+     * This class loader can be set as the thread context class loader for non-OSGi code
+     * @return
+     */
+    public ClassLoader getContextClassLoader() {
+        return classLoader;
+    }
+
+    @SuppressWarnings("unchecked")
+    public Set<ServiceDeclaration> discover(String serviceName, boolean firstOnly) {
+        boolean debug = logger.isLoggable(Level.FINE);
+        Set<ServiceDeclaration> descriptors = new HashSet<ServiceDeclaration>();
+
+        serviceName = "META-INF/services/" + serviceName;
+
+        //        int index = serviceName.lastIndexOf('/');
+        //        String path = serviceName.substring(0, index);
+        //        String file = serviceName.substring(index + 1);
+
+        // long start = System.currentTimeMillis();
+        try {
+            for (Bundle bundle : context.getBundles()) {
+                // Enumeration<URL> urls = bundle.findEntries(path, file, false); // This is expensive
+                final URL url = bundle.getEntry(serviceName);
+                if (url == null) {
+                    continue;
+                }
+
+                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);
+                                if (firstOnly) {
+                                    return descriptors;
+                                }
+                            }
+                        }
+                    } finally {
+                        if (reader != null) {
+                            try {
+                                reader.close();
+                            } catch (IOException e) {
+                                // Ignore
+                            }
+                        }
+                    }
+                } catch (IOException e) {
+                    logger.log(Level.SEVERE, e.getMessage(), e);
+                }
+            }
+        } finally {
+//            long end = System.currentTimeMillis();
+//            if (true) {
+//                logger.info("Duration: " + (end - start) + " ms");
+//            }
+        }
+        return descriptors;
+
+    }
+
+}
diff --git a/sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoveryActivator.java b/sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoveryActivator.java
new file mode 100644
index 0000000000..208ef1a74f
--- /dev/null
+++ b/sandbox/event/modules/extensibility-osgi/src/main/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscoveryActivator.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.osgi;
+
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+
+/**
+ * The Bundle Activator that creates the OSGi-based service discoverer 
+ */
+public class OSGiServiceDiscoveryActivator implements BundleActivator {
+    private static BundleContext bundleContext;
+
+    public void start(BundleContext context) throws Exception {
+        if (bundleContext == null) {
+            bundleContext = context;
+            OSGiServiceDiscoverer discoverer = new OSGiServiceDiscoverer(bundleContext);
+            ServiceDiscovery.getInstance().setServiceDiscoverer(discoverer);
+        }
+    }
+
+    public void stop(BundleContext context) throws Exception {
+        bundleContext = null;
+        // ServiceDiscovery.setServiceDiscoverer(discoverer);
+    }
+
+}
diff --git a/sandbox/event/modules/extensibility-osgi/src/test/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscovererTestCase.java b/sandbox/event/modules/extensibility-osgi/src/test/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscovererTestCase.java
new file mode 100644
index 0000000000..aba7e62637
--- /dev/null
+++ b/sandbox/event/modules/extensibility-osgi/src/test/java/org/apache/tuscany/sca/extensibility/osgi/OSGiServiceDiscovererTestCase.java
@@ -0,0 +1,123 @@
+/*
+ * 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.osgi;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import junit.framework.Assert;
+
+import org.apache.felix.framework.Felix;
+import org.apache.felix.framework.cache.BundleCache;
+import org.apache.felix.framework.util.FelixConstants;
+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.BundleActivator;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.Constants;
+
+/**
+ * 
+ */
+public class OSGiServiceDiscovererTestCase {
+    private static Felix felix;
+    private static OSGiServiceDiscoverer discoverer;
+    private static Bundle testBundle;
+
+    /**
+     * @throws java.lang.Exception
+     */
+    @BeforeClass
+    public static void setUpBeforeClass() throws Exception {
+        // Create a configuration property map.
+        Map<String, String> configMap = new HashMap<String, String>();
+        // Configure the Felix instance to be embedded.
+        configMap.put(FelixConstants.EMBEDDED_EXECUTION_PROP, "true");
+        // Add core OSGi packages to be exported from the class path
+        // via the system bundle.
+        configMap.put(Constants.FRAMEWORK_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");
+        // Explicitly specify the directory to use for caching bundles.
+        configMap.put(BundleCache.CACHE_PROFILE_DIR_PROP, "target/.felix");
+        List<BundleActivator> list = new ArrayList<BundleActivator>();
+
+        // Now create an instance of the framework with
+        // our configuration properties and activator.
+        felix = new Felix(configMap, list);
+
+        // Now start Felix instance.
+        felix.start();
+        BundleContext context = felix.getBundleContext();
+        InputStream is = OSGiServiceDiscovererTestCase.class.getResourceAsStream("/test-bundle.jar");
+        testBundle = context.installBundle("test-bundle", is);
+        is.close();
+        discoverer = new OSGiServiceDiscoverer(context);
+    }
+
+    /**
+     * @throws java.lang.Exception
+     */
+    @AfterClass
+    public static void tearDownAfterClass() throws Exception {
+        if (felix != null) {
+            // Uninstall the bundle to clean up the cache
+            testBundle.uninstall();
+            felix.stop();
+        }
+    }
+
+    @Test
+    public void testDiscovery() {
+        Set<ServiceDeclaration> descriptors =
+            discoverer.discover("test.TestService", false);
+        Assert.assertEquals(1, descriptors.size());
+        descriptors = discoverer.discover("notthere", false);
+        Assert.assertEquals(0, descriptors.size());
+    }
+
+    @Test
+    public void testDiscoveryFirst() {
+        Set<ServiceDeclaration> descriptors =
+            discoverer.discover("test.TestService", true);
+        Assert.assertEquals(1, descriptors.size());
+        descriptors = discoverer.discover("notthere", true);
+        Assert.assertEquals(0, descriptors.size());
+    }    
+    
+    @Test
+    public void testClassLoader () throws IOException {
+        Enumeration<URL> resources = discoverer.getContextClassLoader().getResources("META-INF/services/test.TestService");
+        List<URL> list = Collections.list(resources);
+        Assert.assertEquals(1, list.size());
+    }
+}
diff --git a/sandbox/event/modules/extensibility-osgi/src/test/resources/test-bundle.jar b/sandbox/event/modules/extensibility-osgi/src/test/resources/test-bundle.jar
new file mode 100644
index 0000000000..afee051f61
--- /dev/null
+++ b/sandbox/event/modules/extensibility-osgi/src/test/resources/test-bundle.jar