| /** |
| * 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.loanbroker.queue.version; |
| |
| import javax.jms.ConnectionFactory; |
| |
| import org.apache.activemq.ActiveMQConnectionFactory; |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.builder.RouteBuilder; |
| import org.apache.camel.component.jms.JmsComponent; |
| import org.apache.camel.impl.DefaultCamelContext; |
| |
| /** |
| * The LoanBroker is a RouteBuilder which builds the whole loan message routing rules |
| * |
| * @version |
| */ |
| public class LoanBroker extends RouteBuilder { |
| |
| /** |
| * A main() so we can easily run these routing rules in our IDE |
| */ |
| // START SNIPPET: starting |
| public static void main(String... args) throws Exception { |
| |
| CamelContext context = new DefaultCamelContext(); |
| JmsBroker broker = new JmsBroker(); |
| broker.start(); |
| // Set up the ActiveMQ JMS Components |
| ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:51616"); |
| |
| // Note we can explicitly name the component |
| context.addComponent("jms", JmsComponent.jmsComponentAutoAcknowledge(connectionFactory)); |
| |
| context.addRoutes(new LoanBroker()); |
| // Start the loan broker |
| context.start(); |
| System.out.println("Server is ready"); |
| |
| Thread.sleep(5 * 60 * 1000); |
| context.stop(); |
| Thread.sleep(1000); |
| broker.stop(); |
| |
| } |
| // END SNIPPET: starting |
| |
| /** |
| * Lets configure the Camel routing rules using Java code... |
| */ |
| public void configure() { |
| // START SNIPPET: dsl |
| // Put the message from loanRequestQueue to the creditRequestQueue |
| from("jms:queue:loanRequestQueue").to("jms:queue:creditRequestQueue"); |
| |
| // Now we can let the CreditAgency process the request, then the message will be put into creditResponseQueue |
| from("jms:queue:creditRequestQueue").process(new CreditAgency()).to("jms:queue:creditResponseQueue"); |
| |
| // Here we use the multicast pattern to send the message to three different bank queues |
| from("jms:queue:creditResponseQueue").multicast().to("jms:queue:bank1", "jms:queue:bank2", "jms:queue:bank3"); |
| |
| // Each bank processor will process the message and put the response message into the bankReplyQueue |
| from("jms:queue:bank1").process(new Bank("bank1")).to("jms:queue:bankReplyQueue"); |
| from("jms:queue:bank2").process(new Bank("bank2")).to("jms:queue:bankReplyQueue"); |
| from("jms:queue:bank3").process(new Bank("bank3")).to("jms:queue:bankReplyQueue"); |
| |
| // Now we aggregate the response message by using the Constants.PROPERTY_SSN header. |
| // The aggregation will be complete when all the three bank responses are received |
| // In Camel 2.0 the we use AGGERATED_SIZE instead of AGGERATED_COUNT as the header |
| // name of the aggregated message size. |
| from("jms:queue:bankReplyQueue") |
| .aggregate(header(Constants.PROPERTY_SSN), new BankResponseAggregationStrategy()) |
| .completionPredicate(header(Exchange.AGGREGATED_SIZE).isEqualTo(3)) |
| |
| // Here we do some translation and put the message back to loanReplyQueue |
| .process(new Translator()).to("jms:queue:loanReplyQueue"); |
| |
| // END SNIPPET: dsl |
| |
| // START SNIPPET: dsl-2 |
| // CreditAgency will get the request from parallelLoanRequestQueue |
| from("jms:queue2:parallelLoanRequestQueue").process(new CreditAgency()) |
| // Set the aggregation strategy for aggregating the out message |
| .multicast(new BankResponseAggregationStrategy()) |
| // Send out the request to three different banks in parallel |
| .parallelProcessing().to("jms:queue2:bank1", "jms:queue2:bank2", "jms:queue2:bank3"); |
| |
| // Each bank processor will process the message and put the response message back |
| from("jms:queue2:bank1").process(new Bank("bank1")); |
| from("jms:queue2:bank2").process(new Bank("bank2")); |
| from("jms:queue2:bank3").process(new Bank("bank3")); |
| // END SNIPPET: dsl-2 |
| } |
| } |