| /* |
| * Copyright 2004,2005 The Apache Software Foundation. |
| * |
| * 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. |
| */ |
| package org.apache.axis2.osgi.deployment.tracker; |
| |
| import org.apache.axis2.osgi.deployment.Registry; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.BundleEvent; |
| import org.osgi.framework.BundleListener; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.locks.Lock; |
| import java.util.concurrent.locks.ReentrantLock; |
| |
| /** |
| * BundleTracker listen to bundle events and class the registered Registry |
| * objects to deal with them. One be able to add Registry objects to BundleTracker and remove |
| * them as necessary. When open() is called BundleTracker will open the tracking and when close() |
| * is called close the tracking. |
| */ |
| public class BundleTracker { |
| |
| private List<Registry> registryList = new ArrayList<Registry>(); |
| |
| private List<Bundle> bundleList = new ArrayList<Bundle>(); |
| |
| private boolean open; |
| |
| private BundleContext context; |
| |
| private BundleListener bundleListener; |
| |
| private static Log log = LogFactory.getLog(BundleTracker.class); |
| |
| private final Lock lock = new ReentrantLock(); |
| |
| public BundleTracker(final BundleContext context) { |
| this.context = context; |
| bundleListener = new BundleListener() { |
| public void bundleChanged(BundleEvent event) { |
| lock.lock(); |
| try { |
| if (!open) { |
| return; |
| } |
| Bundle bundle = event.getBundle(); |
| switch (event.getType()) { |
| case BundleEvent.STARTED: |
| if (!bundleList.contains(event.getBundle())) { |
| bundleList.add(event.getBundle()); |
| // logic |
| for (Registry registry : registryList) { |
| registry.register(bundle); |
| } |
| } |
| break; |
| case BundleEvent.STOPPED: |
| if (context.getBundle() != bundle) { |
| if (bundleList.contains(event.getBundle())) { |
| bundleList.remove(event.getBundle()); |
| //logic |
| for (Registry registry : registryList) { |
| registry.unRegister(bundle, false); |
| } |
| |
| } |
| } |
| break; |
| case BundleEvent.UNINSTALLED: |
| if (context.getBundle() != bundle) { |
| if (bundleList.contains(event.getBundle())) { |
| bundleList.remove(event.getBundle()); |
| //logic |
| for (Registry registry : registryList) { |
| registry.remove(bundle); |
| } |
| } |
| } |
| break; |
| } |
| } finally { |
| lock.unlock(); |
| } |
| |
| } |
| }; |
| |
| |
| } |
| |
| public void addRegistry(Registry registry) { |
| registryList.add(registry); |
| } |
| |
| public void open() { |
| lock.lock(); |
| try { |
| if (!open) { |
| open = true; |
| log.info("Bundle tracker is opened"); |
| Bundle[] bundles = context.getBundles(); |
| for (Bundle bundle : bundles) { |
| if (bundle.getState() == Bundle.ACTIVE) { |
| bundleList.add(bundle); |
| for (Registry registry : registryList) { |
| registry.register(bundle); |
| } |
| } |
| } |
| context.addBundleListener(bundleListener); |
| } |
| } finally { |
| lock.unlock(); |
| } |
| } |
| |
| public void close() { |
| lock.lock(); |
| try { |
| if (open) { |
| open = false; |
| context.removeBundleListener(bundleListener); |
| Bundle[] bundles = bundleList.toArray(new Bundle[bundleList.size()]); |
| for (Bundle bundle : bundles) { |
| if (bundleList.remove(bundle)) { |
| for (Registry registry : registryList) { |
| registry.remove(bundle); |
| } |
| } |
| } |
| log.info("Bundle tracker is closed"); |
| } |
| } finally { |
| lock.unlock(); |
| } |
| } |
| |
| |
| } |