summaryrefslogtreecommitdiffstats
path: root/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java
diff options
context:
space:
mode:
authorlresende <lresende@13f79535-47bb-0310-9956-ffa450edef68>2009-11-20 23:53:35 +0000
committerlresende <lresende@13f79535-47bb-0310-9956-ffa450edef68>2009-11-20 23:53:35 +0000
commita3c48da9bb8971497d414f86e352123d95b9c3da (patch)
treefdf0f3636b65946c061c8b2e89d657b488be274e /sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java
parentcc7496466097c3cb8e793ebf3e332b025705aaa7 (diff)
Moving 2.x trunk
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@882795 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java')
-rw-r--r--sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java354
-rw-r--r--sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java44
-rw-r--r--sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java106
3 files changed, 504 insertions, 0 deletions
diff --git a/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java b/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java
new file mode 100644
index 0000000000..31a3ae3b9c
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoverer.java
@@ -0,0 +1,354 @@
+/*
+ * 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 static org.apache.tuscany.sca.extensibility.ServiceDeclarationParser.parseDeclaration;
+
+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.Collection;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Properties;
+import java.util.Set;
+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;
+import org.osgi.framework.Constants;
+import org.osgi.framework.Version;
+
+/**
+ * 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;
+ private Version version;
+
+ public EquinoxServiceDiscoverer(BundleContext context) {
+ this.context = context;
+ Bundle bundle = context.getBundle();
+ this.version = getSCAVersion(bundle);
+ }
+
+ private Version getSCAVersion(Bundle bundle) {
+ Version scaVersion = Version.emptyVersion;
+ String header = (String)bundle.getHeaders().get("SCA-Version");
+ if (header == null) {
+ scaVersion = Version.parseVersion("1.1");
+ } else {
+ header = header.trim();
+ if (header.equals("")) {
+ header = "1.1";
+ }
+ scaVersion = Version.parseVersion(header);
+ }
+ return scaVersion;
+ }
+
+ 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);
+ }
+ });
+ }
+
+ @Override
+ 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();
+ }
+
+ public Bundle getBundle() {
+ return bundle;
+ }
+
+ public boolean isAssignableTo(Class<?> serviceType) {
+ try {
+ loadClass();
+ } catch (ClassNotFoundException e) {
+ // Ignore
+ }
+ return (javaClass != null && serviceType.isAssignableFrom(javaClass));
+ }
+
+ }
+
+ /**
+ * 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();
+
+ }
+
+
+ public ServiceDeclaration getServiceDeclaration(String name) throws IOException {
+ Collection<ServiceDeclaration> declarations = getServiceDeclarations(name);
+ if (declarations.isEmpty()) {
+ return null;
+ } else {
+ return declarations.iterator().next();
+ }
+ }
+
+ private boolean isProviderBundle(Bundle bundle) {
+ if (bundle.getBundleId() == 0 || bundle.getSymbolicName().startsWith("1.x-osgi-bundle")
+ || bundle.getHeaders().get(Constants.FRAGMENT_HOST) != null) {
+ // Skip system bundle as it has access to the application classloader
+ // Skip the 1.x runtime bundle as this has 1.x services in it
+ // For testing running 1.x and 2.x in same VM.
+ // Don't know what final form will be yet.
+ // Skip bundle fragments too
+ return false;
+ }
+ if (bundle.getSymbolicName().startsWith("org.apache.tuscany.sca.")) {
+ Version scaVersion = getSCAVersion(bundle);
+ return scaVersion.compareTo(version) >= 0;
+ }
+ return true;
+ }
+
+ public Collection<ServiceDeclaration> getServiceDeclarations(String serviceName) throws IOException {
+ boolean debug = logger.isLoggable(Level.FINE);
+ Collection<ServiceDeclaration> descriptors = new HashSet<ServiceDeclaration>();
+
+ // http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/xpath/XPathFactory.html
+ boolean isPropertyFile = "javax.xml.xpath.XPathFactory".equals(serviceName);
+ serviceName = "META-INF/services/" + serviceName;
+
+ Set<URL> visited = new HashSet<URL>();
+ //System.out.println(">>>> getServiceDeclarations()");
+ for (Bundle bundle : context.getBundles()) {
+ if (!isProviderBundle(bundle)) {
+ 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 (!visited.add(url)) {
+ // The URL has already been processed
+ 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();
+ }
+ if (isPropertyFile) {
+ // Load as a property file
+ Properties props = new Properties();
+ props.load(is);
+ is.close();
+ for (Map.Entry<Object, Object> e : props.entrySet()) {
+ Map<String, String> attributes = new HashMap<String, String>();
+ String key = (String)e.getKey();
+ String value = (String)e.getValue();
+ // Unfortunately, the xalan file only has the classname
+ if ("".equals(value)) {
+ value = key;
+ key = "";
+ }
+ if (!"".equals(key)) {
+ attributes.put(key, value);
+ attributes.put("uri", key);
+ }
+ attributes.putAll(parseDeclaration(value));
+ ServiceDeclarationImpl descriptor = new ServiceDeclarationImpl(bundle, url, value, attributes);
+ descriptors.add(descriptor);
+ }
+ continue;
+ }
+ 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 = parseDeclaration(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;
+ }
+
+ public ClassLoader getContextClassLoader() {
+ // Get the bundle classloader for the extensibility bundle that has DynamicImport-Package *
+ return getClass().getClassLoader();
+ }
+
+}
diff --git a/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java b/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java
new file mode 100644
index 0000000000..4ccaf57c19
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/EquinoxServiceDiscoveryActivator.java
@@ -0,0 +1,44 @@
+/*
+ * 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 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 final 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 {
+ ServiceDiscovery.getInstance().setServiceDiscoverer(null);
+ }
+
+}
diff --git a/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java b/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java
new file mode 100644
index 0000000000..4b5fffff01
--- /dev/null
+++ b/sca-java-2.x/trunk/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java
@@ -0,0 +1,106 @@
+/*
+ * 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.Hashtable;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.BundleException;
+import org.osgi.framework.ServiceReference;
+import org.osgi.framework.ServiceRegistration;
+
+/**
+ * OSGi ServiceRegistry based extension point registry
+ */
+public class OSGiExtensionPointRegistry extends DefaultExtensionPointRegistry {
+ private Map<Class<?>, ServiceRegistration> registrations = new ConcurrentHashMap<Class<?>, ServiceRegistration>();
+ private BundleContext bundleContext;
+
+ public OSGiExtensionPointRegistry(BundleContext bundleContext) {
+ super(ServiceDiscovery.getInstance(new EquinoxServiceDiscoverer(bundleContext)));
+ this.bundleContext = bundleContext;
+ }
+
+ @Override
+ protected void registerExtensionPoint(Class<?> extensionPointType,
+ Object extensionPoint,
+ ServiceDeclaration declaration) {
+ BundleContext context = bundleContext;
+ if (declaration instanceof EquinoxServiceDiscoverer.ServiceDeclarationImpl) {
+ EquinoxServiceDiscoverer.ServiceDeclarationImpl declarationImpl =
+ (EquinoxServiceDiscoverer.ServiceDeclarationImpl)declaration;
+ Bundle bundle = declarationImpl.getBundle();
+ /**
+ * If this bundle is not in the STARTING, ACTIVE, or STOPPING states or this bundle
+ * is a fragment bundle, then this bundle has no valid BundleContext. This method will
+ * return null if this bundle has no valid BundleContext
+ */
+ if ((bundle.getState() & (Bundle.ACTIVE | Bundle.STARTING)) == 0) {
+ try {
+ bundle.start();
+ } catch (BundleException e) {
+ throw new IllegalStateException(e);
+ }
+ }
+ context = bundle.getBundleContext();
+ }
+ Dictionary<Object, Object> props = new Hashtable<Object, Object>();
+ ServiceRegistration registration = context.registerService(extensionPointType.getName(), extensionPoint, props);
+ registrations.put(extensionPointType, registration);
+ super.registerExtensionPoint(extensionPointType, extensionPoint, declaration);
+ }
+
+ @Override
+ protected void unregisterExtensionPoint(Class<?> i) {
+ ServiceRegistration registration = registrations.remove(i);
+ if (registration != null) {
+ try {
+ registration.unregister();
+ } catch (IllegalStateException e) {
+ // The service has been unregistered, ignore it
+ }
+ }
+ super.unregisterExtensionPoint(i);
+ }
+
+ @Override
+ public synchronized void stop() {
+ for (ServiceRegistration reg : registrations.values()) {
+ try {
+ ServiceReference ref = reg.getReference();
+ if (ref != null) {
+ reg.unregister();
+ }
+ } catch (IllegalStateException e) {
+ // Ignore it, the service has been unregistered when the owning bundle stops
+ }
+ }
+ registrations.clear();
+ super.stop();
+ }
+
+}