| /** |
| * 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.camel.core.osgi; |
| |
| import java.util.Dictionary; |
| import java.util.EventObject; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.management.EventNotifierSupport; |
| import org.apache.camel.management.event.CamelContextStartedEvent; |
| import org.apache.camel.management.event.CamelContextStoppingEvent; |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.Constants; |
| import org.osgi.framework.ServiceRegistration; |
| import org.osgi.framework.Version; |
| |
| /** |
| * This {@link org.apache.camel.spi.EventNotifier} is in charge of registering |
| * {@link CamelContext} in the OSGi registry |
| */ |
| public class OsgiCamelContextPublisher extends EventNotifierSupport { |
| |
| public static final String CONTEXT_SYMBOLIC_NAME_PROPERTY = "camel.context.symbolicname"; |
| public static final String CONTEXT_VERSION_PROPERTY = "camel.context.version"; |
| |
| private final BundleContext bundleContext; |
| private final Map<CamelContext, ServiceRegistration> registrations = new ConcurrentHashMap<CamelContext, ServiceRegistration>(); |
| |
| public OsgiCamelContextPublisher(BundleContext bundleContext) { |
| this.bundleContext = bundleContext; |
| } |
| |
| public void notify(EventObject event) throws Exception { |
| if (event instanceof CamelContextStartedEvent) { |
| CamelContext context = ((CamelContextStartedEvent) event).getContext(); |
| |
| Properties props = new Properties(); |
| props.put(CONTEXT_SYMBOLIC_NAME_PROPERTY, bundleContext.getBundle().getSymbolicName()); |
| props.put(CONTEXT_VERSION_PROPERTY, getBundleVersion(bundleContext.getBundle())); |
| |
| if (log.isDebugEnabled()) { |
| log.debug("Registering CamelContext [" + context.getName() + "] in OSGi registry"); |
| } |
| ServiceRegistration reg = bundleContext.registerService(CamelContext.class.getName(), context, props); |
| registrations.put(context, reg); |
| } else if (event instanceof CamelContextStoppingEvent) { |
| CamelContext context = ((CamelContextStoppingEvent) event).getContext(); |
| ServiceRegistration reg = registrations.get(context); |
| if (reg != null) { |
| if (log.isDebugEnabled()) { |
| log.debug("Unregistering CamelContext [" + context.getName() + "] from OSGi registry"); |
| } |
| reg.unregister(); |
| } |
| } |
| } |
| |
| public boolean isEnabled(EventObject event) { |
| return true; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| registrations.clear(); |
| } |
| |
| public static Version getBundleVersion(Bundle bundle) { |
| Dictionary headers = bundle.getHeaders(); |
| String version = (String) headers.get(Constants.BUNDLE_VERSION); |
| return (version != null) ? Version.parseVersion(version) : Version.emptyVersion; |
| } |
| } |