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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.dosgi.discovery;
import static org.osgi.framework.Bundle.ACTIVE;
import static org.osgi.framework.BundleEvent.STARTED;
import static org.osgi.framework.BundleEvent.STOPPING;
import static org.osgi.service.discovery.DiscoveredServiceNotification.AVAILABLE;
import static org.osgi.service.discovery.DiscoveredServiceNotification.UNAVAILABLE;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.framework.BundleEvent;
import org.osgi.framework.BundleListener;
import org.osgi.service.discovery.ServiceEndpointDescription;
public class LocalDiscoveryService extends AbstractDiscoveryService implements BundleListener {
private ExtensionPointRegistry registry;
public LocalDiscoveryService(BundleContext context) {
super(context);
context.addBundleListener(this);
this.registry = getExtensionPointRegistry();
processExistingBundles();
}
public void bundleChanged(BundleEvent event) {
switch (event.getType()) {
case STARTED:
discover(event.getBundle());
break;
case STOPPING:
removeServicesDeclaredInBundle(event.getBundle());
break;
}
}
private void processExistingBundles() {
Bundle[] bundles = context.getBundles();
if (bundles == null) {
return;
}
for (Bundle b : bundles) {
if (b.getState() == ACTIVE) {
discover(b);
}
}
}
private void discover(Bundle b) {
// TODO: Use SCA contribution to load the service discription files
List<ServiceEndpointDescription> refs = Collections.emptyList();
for (ServiceEndpointDescription sed : refs) {
servicesInfo.put(sed, b);
serviceDescriptionAdded(sed);
}
throw new RuntimeException("To be implemented");
}
private void removeServicesDeclaredInBundle(Bundle bundle) {
for (Iterator<Map.Entry<ServiceEndpointDescription, Bundle>> i = servicesInfo.entrySet().iterator(); i
.hasNext();) {
Entry<ServiceEndpointDescription, Bundle> entry = i.next();
if (entry.getValue().equals(bundle)) {
serviceDescriptionRemoved(entry.getKey());
i.remove();
}
}
}
private void serviceDescriptionAdded(ServiceEndpointDescription sd) {
discoveredServiceChanged(sd, AVAILABLE);
}
private void serviceDescriptionRemoved(ServiceEndpointDescription sd) {
discoveredServiceChanged(sd, UNAVAILABLE);
}
public void stop() {
context.removeBundleListener(this);
super.stop();
}
}
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