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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.osgi.service.discovery.impl;
import static org.apache.tuscany.sca.osgi.remoteserviceadmin.impl.EndpointHelper.createEndpointDescription;
import java.util.Dictionary;
import org.apache.tuscany.sca.assembly.Endpoint;
import org.apache.tuscany.sca.assembly.Implementation;
import org.apache.tuscany.sca.core.LifeCycleListener;
import org.apache.tuscany.sca.implementation.osgi.OSGiImplementation;
import org.apache.tuscany.sca.node.configuration.NodeConfiguration;
import org.apache.tuscany.sca.runtime.DomainRegistryFactory;
import org.apache.tuscany.sca.runtime.EndpointListener;
import org.apache.tuscany.sca.runtime.DomainRegistry;
import org.apache.tuscany.sca.runtime.ExtensibleDomainRegistryFactory;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleContext;
import org.osgi.service.remoteserviceadmin.EndpointDescription;
/**
* Discovery service based on the distributed SCA domain
*/
public class DomainDiscoveryService extends AbstractDiscoveryService implements EndpointListener {
private DomainRegistryFactory domainRegistryFactory;
private DomainRegistry domainRegistry;
public DomainDiscoveryService(BundleContext context) {
super(context);
}
public void start() {
super.start();
this.domainRegistryFactory = ExtensibleDomainRegistryFactory.getInstance(registry);
domainRegistryFactory.addListener(this);
// [rfeng] Starting of the endpoint registry takes a long time and it leaves the bundle
// state to be starting. When the registry is started, remote endpoints come in and that
// triggers the classloading from this bundle.
Thread thread = new Thread() {
public void run() {
startEndpointRegistry();
}
};
thread.start();
}
private synchronized void startEndpointRegistry() {
// The following code forced the start() of the domain registry in absense of services
String domainRegistryURI = context.getProperty("org.osgi.sca.domain.registry");
if (domainRegistryURI == null) {
domainRegistryURI = NodeConfiguration.DEFAULT_DOMAIN_REGISTRY_URI;
}
String domainURI = context.getProperty("org.osgi.sca.domain.uri");
if (domainURI == null) {
domainURI = NodeConfiguration.DEFAULT_DOMAIN_URI;
}
if (domainRegistry != null) {
domainRegistry = domainRegistryFactory.getEndpointRegistry(domainRegistryURI, domainURI);
}
}
public void endpointAdded(Endpoint endpoint) {
Implementation impl = endpoint.getComponent().getImplementation();
/*
if (!(impl instanceof OSGiImplementation)) {
return;
}
*/
BundleContext bundleContext = null;
// Remote endpoint doesn't have a bundle
if (!endpoint.isRemote()) {
OSGiImplementation osgiImpl = (OSGiImplementation)impl;
Bundle bundle = osgiImpl.getBundle();
bundleContext = bundle != null ? bundle.getBundleContext() : null;
}
// Notify the endpoint listeners
EndpointDescription description = createEndpointDescription(bundleContext, endpoint);
// Set the owning bundle to runtime bundle to avoid NPE
synchronized (this) {
endpointDescriptions.put(description, context.getBundle());
endpointChanged(description, ADDED);
}
}
public void endpointRemoved(Endpoint endpoint) {
EndpointDescription description = createEndpointDescription(context, endpoint);
synchronized (this) {
endpointDescriptions.remove(description);
endpointChanged(description, REMOVED);
}
}
public void endpointUpdated(Endpoint oldEndpoint, Endpoint newEndpoint) {
// FIXME: This is a quick and dirty way for the update
endpointRemoved(oldEndpoint);
endpointAdded(newEndpoint);
}
public void stop() {
if (domainRegistryFactory != null) {
domainRegistryFactory.removeListener(this);
if (domainRegistry instanceof LifeCycleListener) {
((LifeCycleListener)domainRegistry).stop();
}
domainRegistryFactory = null;
domainRegistry = null;
super.stop();
}
}
@Override
protected Dictionary<String, Object> getProperties() {
Dictionary<String, Object> props = super.getProperties();
props.put(SUPPORTED_PROTOCOLS, new String[] {"org.osgi.sca"});
return props;
}
}
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