| /** |
| * 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.Collection; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| import java.util.concurrent.ThreadPoolExecutor; |
| |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.Component; |
| import org.apache.camel.Endpoint; |
| import org.apache.camel.Processor; |
| import org.apache.camel.Route; |
| import org.apache.camel.Service; |
| import org.apache.camel.builder.ErrorHandlerBuilder; |
| import org.apache.camel.spi.LifecycleStrategy; |
| import org.apache.camel.spi.Registry; |
| import org.apache.camel.spi.RouteContext; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceReference; |
| |
| /** |
| * The OsgiServiceRegistry support to get the service object from the bundle context |
| */ |
| public class OsgiServiceRegistry implements Registry, LifecycleStrategy { |
| private final BundleContext bundleContext; |
| private final Map<String, Object> serviceCacheMap = new ConcurrentHashMap<String, Object>(); |
| private final ConcurrentLinkedQueue<ServiceReference> serviceReferenceQueue = new ConcurrentLinkedQueue<ServiceReference>(); |
| |
| public OsgiServiceRegistry(BundleContext bc) { |
| bundleContext = bc; |
| } |
| |
| public <T> T lookup(String name, Class<T> type) { |
| Object service = lookup(name); |
| return type.cast(service); |
| } |
| |
| public Object lookup(String name) { |
| Object service = serviceCacheMap.get(name); |
| if (service == null) { |
| ServiceReference sr = bundleContext.getServiceReference(name); |
| if (sr != null) { |
| // Need to keep the track of Service |
| // and call ungetService when the camel context is closed |
| serviceReferenceQueue.add(sr); |
| service = bundleContext.getService(sr); |
| if (service != null) { |
| serviceCacheMap.put(name, service); |
| } |
| } |
| } |
| return service; |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> Map<String, T> lookupByType(Class<T> type) { |
| // not implemented so we return an empty map |
| return Collections.EMPTY_MAP; |
| } |
| |
| public void onComponentAdd(String name, Component component) { |
| // noop |
| } |
| |
| public void onComponentRemove(String name, Component component) { |
| // noop |
| } |
| |
| public void onContextStart(CamelContext context) { |
| // noop |
| } |
| |
| public void onContextStop(CamelContext context) { |
| // Unget the OSGi service |
| ServiceReference sr = serviceReferenceQueue.poll(); |
| while (sr != null) { |
| bundleContext.ungetService(sr); |
| sr = serviceReferenceQueue.poll(); |
| } |
| // Clean up the OSGi Service Cache |
| serviceCacheMap.clear(); |
| } |
| |
| public void onEndpointAdd(Endpoint endpoint) { |
| // noop |
| } |
| |
| public void onEndpointRemove(Endpoint endpoint) { |
| // noop |
| } |
| |
| public void onRouteContextCreate(RouteContext routeContext) { |
| // noop |
| } |
| |
| public void onRoutesAdd(Collection<Route> routes) { |
| // noop |
| } |
| |
| public void onRoutesRemove(Collection<Route> routes) { |
| // noop |
| } |
| |
| public void onServiceAdd(CamelContext context, Service service, Route route) { |
| // noop |
| } |
| |
| public void onServiceRemove(CamelContext context, Service service, Route route) { |
| // noop |
| } |
| |
| public void onErrorHandlerAdd(RouteContext routeContext, Processor processor, ErrorHandlerBuilder errorHandlerBuilder) { |
| // noop |
| } |
| |
| public void onThreadPoolAdd(CamelContext camelContext, ThreadPoolExecutor threadPoolExecutor, |
| String id, String sourceId, String routeId, String threadPoolProfileId) { |
| // noop |
| } |
| } |