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/*******************************************************************************
* Copyright (c) 2009, 2010 VMware Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Apache License v2.0 which accompanies this distribution.
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
* and the Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php.
* You may elect to redistribute this code under either of these licenses.
*
* Contributors:
* VMware Inc. - initial contribution
*******************************************************************************/
package org.eclipse.gemini.web.internal;
import java.util.Dictionary;
import java.util.Hashtable;
import java.util.Map;
import javax.servlet.ServletContext;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.url.URLConstants;
import org.osgi.service.url.URLStreamHandlerService;
import org.osgi.util.tracker.ServiceTracker;
import org.osgi.util.tracker.ServiceTrackerCustomizer;
import org.eclipse.gemini.web.core.WebBundleManifestTransformer;
import org.eclipse.gemini.web.core.WebContainer;
import org.eclipse.gemini.web.core.spi.ServletContainer;
import org.eclipse.gemini.web.internal.url.ChainingWebBundleManifestTransformer;
import org.eclipse.gemini.web.internal.url.DefaultsWebBundleManifestTransformer;
import org.eclipse.gemini.web.internal.url.SpecificationWebBundleManifestTransformer;
import org.eclipse.gemini.web.internal.url.SystemBundleExportsImportingWebBundleManifestTransformer;
import org.eclipse.gemini.web.internal.url.WebBundleUrl;
import org.eclipse.gemini.web.internal.url.WebBundleUrlStreamHandlerService;
import org.eclipse.virgo.util.osgi.ServiceRegistrationTracker;
import org.eclipse.virgo.util.osgi.VersionRange;
public class WebContainerActivator implements BundleActivator {
private final ServiceRegistrationTracker regTracker = new ServiceRegistrationTracker();
private volatile EventManager eventManager;
private ServiceTracker<ServletContainer, WebContainer> serviceTracker;
public void start(BundleContext context) throws Exception {
WebBundleManifestTransformer transformer = registerWebBundleManifestTransformer(context);
registerUrlStreamHandler(context, transformer);
this.eventManager = new EventManager(context);
this.eventManager.start();
this.serviceTracker = new ServiceTracker(context, ServletContainer.class, new ServletContainerTracker(context, this.eventManager));
this.serviceTracker.open();
}
public void stop(BundleContext context) throws Exception {
this.serviceTracker.close();
this.regTracker.unregisterAll();
this.eventManager.stop();
}
private WebBundleManifestTransformer registerWebBundleManifestTransformer(BundleContext context) {
WebBundleManifestTransformer specTransformer = new SpecificationWebBundleManifestTransformer();
WebBundleManifestTransformer defaultsTransformer = new DefaultsWebBundleManifestTransformer();
Map<String, VersionRange> systemBundleExports = new SystemBundleExportsResolver(context).getSystemBundleExports();
WebBundleManifestTransformer systemBundleExportImportingWebBundleManifestTransformer = new SystemBundleExportsImportingWebBundleManifestTransformer(systemBundleExports);
WebBundleManifestTransformer chainingTransformer = new ChainingWebBundleManifestTransformer(specTransformer, defaultsTransformer, systemBundleExportImportingWebBundleManifestTransformer);
ServiceRegistration<WebBundleManifestTransformer> reg = context.registerService(WebBundleManifestTransformer.class, chainingTransformer, null);
this.regTracker.track(reg);
return chainingTransformer;
}
private void registerUrlStreamHandler(BundleContext context, WebBundleManifestTransformer transformer) {
Dictionary<String, Object> props = new Hashtable<String, Object>();
props.put(URLConstants.URL_HANDLER_PROTOCOL, WebBundleUrl.SCHEME);
ServiceRegistration<URLStreamHandlerService> reg = context.registerService(URLStreamHandlerService.class, new WebBundleUrlStreamHandlerService(transformer), props);
this.regTracker.track(reg);
}
private static final class ServletContainerTracker implements ServiceTrackerCustomizer<ServletContext, WebContainer> {
private final ServiceRegistrationTracker regTracker = new ServiceRegistrationTracker();
private final BundleContext context;
private final EventManager eventManager;
public ServletContainerTracker(BundleContext context, EventManager eventManager) {
this.context = context;
this.eventManager = eventManager;
}
public WebContainer addingService(ServiceReference<ServletContext> reference) {
ServletContainer container = (ServletContainer) this.context.getService(reference);
WebContainer webContainer = new StandardWebContainer(container, this.eventManager);
ServiceRegistration<WebContainer> reg = context.registerService(WebContainer.class, webContainer, null);
this.regTracker.track(reg);
return webContainer;
}
public void modifiedService(ServiceReference<ServletContext> reference, WebContainer service) {
}
public void removedService(ServiceReference<ServletContext> reference, WebContainer service) {
this.regTracker.unregisterAll();
service.halt();
}
}
}
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