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Diffstat (limited to 'branches/sca-java-2.0-M4/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java')
-rw-r--r-- | branches/sca-java-2.0-M4/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/branches/sca-java-2.0-M4/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java b/branches/sca-java-2.0-M4/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java new file mode 100644 index 0000000000..bfa98ad725 --- /dev/null +++ b/branches/sca-java-2.0-M4/modules/extensibility-equinox/src/main/java/org/apache/tuscany/sca/extensibility/equinox/OSGiExtensionPointRegistry.java @@ -0,0 +1,125 @@ +/* + * 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.IdentityHashMap; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; + +import org.apache.tuscany.sca.core.DefaultExtensionPointRegistry; +import org.apache.tuscany.sca.core.LifeCycleListener; +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +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; + +/** + * + */ +public class OSGiExtensionPointRegistry extends DefaultExtensionPointRegistry { + private Map<Class<?>, ServiceRegistration> services = new ConcurrentHashMap<Class<?>, ServiceRegistration>(); + private BundleContext bundleContext; + + public OSGiExtensionPointRegistry(BundleContext bundleContext) { + super(); + this.bundleContext = bundleContext; + } + + @Override + protected <T> Object findExtensionPoint(Class<T> extensionPointType) { + ServiceRegistration registration = services.get(extensionPointType); + if (registration != null) { + ServiceReference ref = registration.getReference(); + if (ref != null) { + return ref.getBundle().getBundleContext().getService(ref); + } + } + /* + else { + ServiceReference ref = bundleContext.getServiceReference(extensionPointType.getName()); + if (ref != null) { + return bundleContext.getService(ref); + } + } + */ + return null; + } + + @Override + protected void registerExtensionPoint(Class<?> i, 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(i.getName(), extensionPoint, props); + services.put(i, registration); + } + + @Override + protected void unregisterExtensionPoint(Class<?> i) { + ServiceRegistration registration = services.get(i); + if (registration != null) { + registration.unregister(); + } + services.remove(i); + } + + @Override + public void stop() { + // Get a unique map as an extension point may exist in the map by different keys + Map<LifeCycleListener, LifeCycleListener> map = new IdentityHashMap<LifeCycleListener, LifeCycleListener>(); + for (ServiceRegistration reg : services.values()) { + ServiceReference ref = reg.getReference(); + if (ref != null) { + Object service = bundleContext.getService(ref); + if (service instanceof LifeCycleListener) { + LifeCycleListener activator = (LifeCycleListener)service; + map.put(activator, activator); + } + reg.unregister(); + } + } + for (LifeCycleListener activator : map.values()) { + activator.stop(); + } + services.clear(); + } + +} |