bundles/org.eclipse.equinox.p2.metadata.repository/src/org/eclipse/equinox/internal/p2/metadata/repository/Activator.java

/*******************************************************************************
 *  Copyright (c) 2007, 2009 IBM Corporation and others.
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 * 
 *  Contributors:
 *     IBM Corporation - initial API and implementation
 *     Cloudsmith Inc - additional implementation
 *******************************************************************************/
package org.eclipse.equinox.internal.p2.metadata.repository;

import org.eclipse.equinox.internal.provisional.p2.core.eventbus.IProvisioningEventBus;
import org.eclipse.equinox.internal.provisional.p2.metadata.repository.IMetadataRepositoryManager;
import org.osgi.framework.*;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;

public class Activator implements BundleActivator, ServiceTrackerCustomizer {

	public static final String ID = "org.eclipse.equinox.p2.metadata.repository"; //$NON-NLS-1$
	public static final String REPO_PROVIDER_XPT = ID + '.' + "metadataRepositories"; //$NON-NLS-1$

	private static BundleContext bundleContext;
	private static CacheManager cacheManager;
	private ServiceRegistration repositoryManagerRegistration;
	private MetadataRepositoryManager repositoryManager;
	private ServiceTracker tracker;

	public static BundleContext getContext() {
		return bundleContext;
	}

	public static CacheManager getCacheManager() {
		return cacheManager;
	}

	public void start(BundleContext context) throws Exception {
		Activator.bundleContext = context;
		cacheManager = new CacheManager();

		// need to track event bus coming and going to make sure cache gets cleaned on
		// repository removals
		tracker = new ServiceTracker(context, IProvisioningEventBus.SERVICE_NAME, this);
		tracker.open();

		cacheManager.registerRepoEventListener();
		repositoryManager = new MetadataRepositoryManager();
		repositoryManagerRegistration = context.registerService(IMetadataRepositoryManager.class.getName(), repositoryManager, null);
	}

	public void stop(BundleContext context) throws Exception {
		if (cacheManager != null) {
			cacheManager.unregisterRepoEventListener();
			cacheManager = null;
		}
		Activator.bundleContext = null;
		if (repositoryManagerRegistration != null)
			repositoryManagerRegistration.unregister();
		repositoryManagerRegistration = null;
		if (repositoryManager != null) {
			repositoryManager.shutdown();
			repositoryManager = null;
		}
	}

	public Object addingService(ServiceReference reference) {
		cacheManager.registerRepoEventListener();
		return null;
	}

	public void modifiedService(ServiceReference reference, Object service) {
		// ignored

	}

	public void removedService(ServiceReference reference, Object service) {
		// ignored

	}
}