| /** |
| * 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.processor; |
| |
| import java.util.List; |
| |
| import org.apache.camel.AsyncCallback; |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Processor; |
| import org.apache.camel.Route; |
| import org.apache.camel.impl.ServiceSupport; |
| import org.apache.camel.impl.SynchronizationAdapter; |
| import org.apache.camel.spi.RoutePolicy; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * {@link Processor} which instruments the {@link RoutePolicy}. |
| * |
| * @version |
| */ |
| public class RoutePolicyProcessor extends DelegateAsyncProcessor { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(RoutePolicyProcessor.class); |
| private final List<RoutePolicy> routePolicies; |
| private Route route; |
| |
| public RoutePolicyProcessor(Processor processor, List<RoutePolicy> routePolicies) { |
| super(processor); |
| this.routePolicies = routePolicies; |
| } |
| |
| @Override |
| public String toString() { |
| return "RoutePolicy[" + routePolicies + "]"; |
| } |
| |
| @Override |
| public boolean process(Exchange exchange, AsyncCallback callback) { |
| |
| // invoke begin |
| for (RoutePolicy policy : routePolicies) { |
| try { |
| if (isRoutePolicyRunAllowed(policy)) { |
| policy.onExchangeBegin(route, exchange); |
| } |
| } catch (Exception e) { |
| LOG.warn("Error occurred during onExchangeBegin on RoutePolicy: " + policy |
| + ". This exception will be ignored", e); |
| } |
| } |
| |
| // add on completion that invokes the policy callback on complete |
| // as the Exchange can be routed async and thus we need the callback to |
| // invoke when the route is completed |
| exchange.addOnCompletion(new SynchronizationAdapter() { |
| @Override |
| public void onDone(Exchange exchange) { |
| // do not invoke it if Camel is stopping as we don't want |
| // the policy to start a consumer during Camel is stopping |
| if (isCamelStopping(exchange.getContext())) { |
| return; |
| } |
| |
| for (RoutePolicy policy : routePolicies) { |
| try { |
| if (isRoutePolicyRunAllowed(policy)) { |
| policy.onExchangeDone(route, exchange); |
| } |
| } catch (Exception e) { |
| LOG.warn("Error occurred during onExchangeDone on RoutePolicy: " + policy |
| + ". This exception will be ignored", e); |
| } |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "RoutePolicyOnCompletion"; |
| } |
| }); |
| |
| return super.process(exchange, callback); |
| } |
| |
| /** |
| * Sets the route this policy applies. |
| * |
| * @param route the route |
| */ |
| public void setRoute(Route route) { |
| this.route = route; |
| } |
| |
| /** |
| * Strategy to determine if this policy is allowed to run |
| * |
| * @param policy the policy |
| * @return <tt>true</tt> to run |
| */ |
| protected boolean isRoutePolicyRunAllowed(RoutePolicy policy) { |
| if (policy instanceof ServiceSupport) { |
| ServiceSupport ss = (ServiceSupport) policy; |
| return ss.isRunAllowed(); |
| } |
| return true; |
| } |
| |
| private static boolean isCamelStopping(CamelContext context) { |
| if (context instanceof ServiceSupport) { |
| ServiceSupport ss = (ServiceSupport) context; |
| return ss.isStopping() || ss.isStopped(); |
| } |
| return false; |
| } |
| |
| } |