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/*
* 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.node.osgi.impl;
import java.net.URL;
import java.util.Dictionary;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.tuscany.sca.node.Node;
import org.apache.tuscany.sca.node.configuration.NodeConfiguration;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleEvent;
import org.osgi.framework.ServiceEvent;
import org.osgi.framework.ServiceListener;
import org.osgi.framework.SynchronousBundleListener;
/**
* Managing the mapping between OSGi bundles and SCA implementation.osgi
*/
public class NodeManager implements SynchronousBundleListener, ServiceListener {
private static final Logger logger = Logger.getLogger(NodeManager.class.getName());
private BundleContext bundleContext;
OSGiNodeFactoryImpl factory;
public NodeManager(BundleContext bundleContext) {
super();
this.bundleContext = bundleContext;
this.factory = new OSGiNodeFactoryImpl(this.bundleContext);
}
public void start() {
for (Bundle b : bundleContext.getBundles()) {
if ((b.getState() & Bundle.ACTIVE) != 0) {
// Process the active bundles
bundleStarted(b);
}
}
}
public void stop() {
if (factory != null) {
factory.destroy();
}
}
public static boolean isSCABundle(Bundle bundle) {
Dictionary<?, ?> headers = bundle.getHeaders();
// OSGi RFC 119 SCA
if (headers.get("SCA-Composite") != null) {
return true;
}
URL bundleComposite = bundle.getResource("OSGI-INF/sca/bundle.composite");
if (bundleComposite != null) {
return true;
}
/* FIXME: What if there is a META-INF/sca-contribution.xml? There are two cases:
* 1. The file contains deployable elements
* 2. The file doesn't contain deployable elements
*/
/*
* FIXME: Do we want to use all of the .composite files under OSGI-INF/sca?
*/
/*
Enumeration<?> entries = bundle.findEntries("OSGI-INF/sca", "bundle.composite", false);
if (entries != null && entries.hasMoreElements()) {
return true;
}
// OSGi Declarative Services
if (headers.get("Service-Component") != null) {
return true;
}
// OSGI RFC 124: BluePrint Service
if (headers.get("Bundle-Blueprint") != null) {
return true;
}
entries = bundle.findEntries("OSGI-INF/blueprint", "*.xml", false);
if (entries != null && entries.hasMoreElements()) {
return true;
}
*/
return false;
}
private void bundleStarted(Bundle bundle) {
if (!isSCABundle(bundle)) {
return;
}
try {
NodeConfiguration configuration = factory.getConfiguration(bundle, null);
Node node = factory.createNode(configuration);
node.start();
} catch (Throwable e) {
logger.log(Level.SEVERE, e.getMessage(), e);
}
}
private void bundleStopping(Bundle bundle) {
Node node = factory.getNodes().get(bundle);
if (node == null) {
return;
}
node.stop();
}
public void serviceChanged(ServiceEvent event) {
}
public void bundleChanged(BundleEvent event) {
int type = event.getType();
if (type == BundleEvent.STOPPING) {
bundleStopping(event.getBundle());
} else if (type == BundleEvent.STARTED) {
bundleStarted(event.getBundle());
}
}
}
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