| /** |
| * 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.itest.jetty; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Processor; |
| import org.apache.camel.ProducerTemplate; |
| import org.apache.camel.builder.RouteBuilder; |
| import org.apache.camel.test.junit4.CamelTestSupport; |
| import org.junit.Test; |
| |
| /** |
| * @version |
| */ |
| public class JettySimulateFailoverRoundRobinTest extends CamelTestSupport { |
| |
| private String bad = "jetty:http://localhost:8871/bad"; |
| private String bad2 = "jetty:http://localhost:8872/bad2"; |
| private String good = "jetty:http://localhost:8873/good"; |
| private String good2 = "jetty:http://localhost:8874/good2"; |
| |
| @Test |
| public void testJettySimulateFailoverRoundRobin() throws Exception { |
| getMockEndpoint("mock:bad").expectedMessageCount(1); |
| getMockEndpoint("mock:bad2").expectedMessageCount(1); |
| getMockEndpoint("mock:good").expectedMessageCount(1); |
| getMockEndpoint("mock:good2").expectedMessageCount(0); |
| |
| String reply = template.requestBody("direct:start", null, String.class); |
| assertEquals("Good", reply); |
| |
| assertMockEndpointsSatisfied(); |
| |
| // reset mocks and send a message again to see that round robin |
| // continue where it should |
| resetMocks(); |
| |
| getMockEndpoint("mock:bad").expectedMessageCount(0); |
| getMockEndpoint("mock:bad2").expectedMessageCount(0); |
| getMockEndpoint("mock:good").expectedMessageCount(0); |
| getMockEndpoint("mock:good2").expectedMessageCount(1); |
| |
| reply = template.requestBody("direct:start", null, String.class); |
| assertEquals("Also good", reply); |
| } |
| |
| @Override |
| protected RouteBuilder createRouteBuilder() throws Exception { |
| return new RouteBuilder() { |
| @Override |
| public void configure() throws Exception { |
| from("direct:start") |
| .process(new MyFailoverLoadBalancer(template, bad, bad2, good, good2)); |
| |
| from(bad) |
| .to("mock:bad") |
| .process(new Processor() { |
| public void process(Exchange exchange) throws Exception { |
| exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, 500); |
| exchange.getIn().setBody("Something bad happened"); |
| } |
| }); |
| |
| from(bad2) |
| .to("mock:bad2") |
| .process(new Processor() { |
| public void process(Exchange exchange) throws Exception { |
| exchange.getIn().setHeader(Exchange.HTTP_RESPONSE_CODE, 404); |
| exchange.getIn().setBody("Not found"); |
| } |
| }); |
| |
| from(good) |
| .to("mock:good") |
| .process(new Processor() { |
| public void process(Exchange exchange) throws Exception { |
| exchange.getIn().setBody("Good"); |
| } |
| }); |
| |
| from(good2) |
| .to("mock:good2") |
| .process(new Processor() { |
| public void process(Exchange exchange) throws Exception { |
| exchange.getIn().setBody("Also good"); |
| } |
| }); |
| } |
| }; |
| } |
| |
| /** |
| * A custom failover processor |
| */ |
| public static class MyFailoverLoadBalancer implements Processor { |
| |
| private final ProducerTemplate template; |
| private final List<String> endpoints; |
| private int counter = -1; |
| |
| public MyFailoverLoadBalancer(ProducerTemplate template, String... endpoints) { |
| this.template = template; |
| this.endpoints = new ArrayList<String>(Arrays.asList(endpoints)); |
| } |
| |
| public void process(Exchange exchange) throws Exception { |
| boolean done = false; |
| while (!done) { |
| // pick endpoint |
| if (++counter >= endpoints.size()) { |
| counter = 0; |
| } |
| String endpoint = endpoints.get(counter); |
| |
| // process exchange |
| try { |
| template.send(endpoint, exchange); |
| } catch (Exception e) { |
| exchange.setException(e); |
| } |
| |
| // check whether we are done or prepare for failover |
| done = exchange.getException() == null; |
| if (!done) { |
| prepareExchangeForFailover(exchange); |
| } |
| } |
| } |
| |
| private void prepareExchangeForFailover(Exchange exchange) { |
| exchange.setException(null); |
| |
| exchange.setProperty(Exchange.ERRORHANDLER_HANDLED, null); |
| exchange.setProperty(Exchange.FAILURE_HANDLED, null); |
| exchange.setProperty(Exchange.EXCEPTION_CAUGHT, null); |
| exchange.getIn().removeHeader(Exchange.REDELIVERED); |
| exchange.getIn().removeHeader(Exchange.REDELIVERY_COUNTER); |
| } |
| |
| } |
| |
| } |