| /** |
| * 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.component.browse; |
| |
| import java.util.List; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| import org.apache.camel.Component; |
| import org.apache.camel.Consumer; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Processor; |
| import org.apache.camel.Producer; |
| import org.apache.camel.Service; |
| import org.apache.camel.impl.DefaultEndpoint; |
| import org.apache.camel.impl.DefaultProducer; |
| import org.apache.camel.processor.loadbalancer.LoadBalancer; |
| import org.apache.camel.processor.loadbalancer.LoadBalancerConsumer; |
| import org.apache.camel.processor.loadbalancer.TopicLoadBalancer; |
| import org.apache.camel.spi.BrowsableEndpoint; |
| |
| /** |
| * An endpoint which maintains a {@link List} of {@link Exchange} instances |
| * which can be useful for tooling, debugging and visualising routes. |
| * |
| * @version |
| */ |
| public class BrowseEndpoint extends DefaultEndpoint implements BrowsableEndpoint, Service { |
| private List<Exchange> exchanges; |
| private final LoadBalancer loadBalancer = new TopicLoadBalancer(); |
| |
| public BrowseEndpoint() { |
| } |
| |
| public BrowseEndpoint(String uri, Component component) { |
| super(uri, component); |
| } |
| |
| public boolean isSingleton() { |
| return true; |
| } |
| |
| public List<Exchange> getExchanges() { |
| if (exchanges == null) { |
| exchanges = createExchangeList(); |
| } |
| return exchanges; |
| } |
| |
| public Producer createProducer() throws Exception { |
| return new DefaultProducer(this) { |
| public void process(Exchange exchange) throws Exception { |
| onExchange(exchange); |
| } |
| }; |
| } |
| |
| public Consumer createConsumer(Processor processor) throws Exception { |
| return new LoadBalancerConsumer(this, processor, loadBalancer); |
| } |
| |
| protected List<Exchange> createExchangeList() { |
| return new CopyOnWriteArrayList<Exchange>(); |
| } |
| |
| /** |
| * Invoked on a message exchange being sent by a producer |
| * |
| * @param exchange the exchange |
| * @throws Exception is thrown if failed to process the exchange |
| */ |
| protected void onExchange(Exchange exchange) throws Exception { |
| getExchanges().add(exchange); |
| |
| // now fire any consumers |
| loadBalancer.process(exchange); |
| } |
| |
| public void start() throws Exception { |
| exchanges = createExchangeList(); |
| } |
| |
| public void stop() throws Exception { |
| if (exchanges != null) { |
| exchanges.clear(); |
| exchanges = null; |
| } |
| } |
| } |