/* | |
* 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.felix.ipojo.handler.extender; | |
import java.lang.reflect.InvocationTargetException; | |
import java.util.Dictionary; | |
import java.util.HashSet; | |
import java.util.Set; | |
import org.apache.felix.ipojo.PrimitiveHandler; | |
import org.apache.felix.ipojo.util.Callback; | |
import org.osgi.framework.Bundle; | |
/** | |
* Track and manage extensions. | |
* @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> | |
*/ | |
public class ExtenderManager extends BundleTracker { | |
/** | |
* Looked extension. | |
*/ | |
private String m_extension; | |
/** | |
* OnArrival method. | |
*/ | |
private Callback m_onArrival; | |
/** | |
* OnDeparture method. | |
*/ | |
private Callback m_onDeparture; | |
/** | |
* Attached handler. | |
*/ | |
private PrimitiveHandler m_handler; | |
/** | |
* Set of managed bundles. | |
*/ | |
private Set m_bundles = new HashSet(); | |
/** | |
* Constructor. | |
* @param handler : attached handler. | |
* @param extension : looked extension. | |
* @param bind : onArrival method | |
* @param unbind : onDeparture method. | |
*/ | |
public ExtenderManager(ExtenderModelHandler handler, String extension, String bind, String unbind) { | |
super(handler.getInstanceManager().getContext()); | |
m_handler = handler; | |
m_onArrival = new Callback(bind, new Class[] {Bundle.class, String.class}, false, m_handler.getInstanceManager()); | |
m_onDeparture = new Callback(unbind, new Class[] {Bundle.class}, false, m_handler.getInstanceManager()); | |
m_extension = extension; | |
} | |
/** | |
* A bundle arrives. | |
* Checks if the bundle match with the looked extension, if so call the arrival callback. | |
* @param bundle : arriving bundle. | |
* @see org.apache.felix.ipojo.handler.extender.BundleTracker#addedBundle(org.osgi.framework.Bundle) | |
*/ | |
protected void addedBundle(Bundle bundle) { | |
Dictionary headers = bundle.getHeaders(); | |
String header = (String) headers.get(m_extension); | |
if (header != null) { | |
synchronized (this) { | |
m_bundleSet.add(bundle); | |
} | |
try { | |
m_onArrival.call(new Object[] {bundle, header}); | |
} catch (NoSuchMethodException e) { | |
m_handler.error("The onArrival method " + m_onArrival.getMethod() + " does not exist in the class", e); | |
m_handler.getInstanceManager().stop(); | |
} catch (IllegalAccessException e) { | |
m_handler.error("The onArrival method " + m_onArrival.getMethod() + " cannot be called", e); | |
m_handler.getInstanceManager().stop(); | |
} catch (InvocationTargetException e) { | |
m_handler.error("The onArrival method " + m_onArrival.getMethod() + " has thrown an exception", e.getTargetException()); | |
m_handler.getInstanceManager().stop(); | |
} | |
} | |
} | |
/** | |
* A bundle is stopping. | |
* Check if the bundle was managed, if so call the remove departure callback. | |
* @param bundle : leaving bundle. | |
* @see org.apache.felix.ipojo.handler.extender.BundleTracker#removedBundle(org.osgi.framework.Bundle) | |
*/ | |
protected void removedBundle(Bundle bundle) { | |
boolean contained; | |
synchronized (this) { | |
contained = m_bundles.remove(bundle); // Stack confinement | |
} | |
if (contained) { | |
try { | |
m_onDeparture.call(new Object[] {bundle}); | |
} catch (NoSuchMethodException e) { | |
m_handler.error("The onDeparture method " + m_onDeparture.getMethod() + " does not exist in the class", e); | |
m_handler.getInstanceManager().stop(); | |
} catch (IllegalAccessException e) { | |
m_handler.error("The onDeparture method " + m_onDeparture.getMethod() + " cannot be called", e); | |
m_handler.getInstanceManager().stop(); | |
} catch (InvocationTargetException e) { | |
m_handler.error("The onDeparture method " + m_onDeparture.getMethod() + " has thrown an exception", e.getTargetException()); | |
m_handler.getInstanceManager().stop(); | |
} | |
} | |
} | |
} |