| /** |
| * 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.issues; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.apache.camel.ContextTestSupport; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Processor; |
| import org.apache.camel.ProducerTemplate; |
| import org.apache.camel.builder.RouteBuilder; |
| |
| /** |
| * Based on user forum request how to do failover with Camel 1.x |
| * |
| * @version |
| */ |
| public class CustomFailveOverProcessor extends ContextTestSupport { |
| |
| public void testFailOver() throws Exception { |
| getMockEndpoint("mock:a").expectedMessageCount(1); |
| getMockEndpoint("mock:b").expectedMessageCount(1); |
| |
| String out = template.requestBody("direct:start", "Hello World", String.class); |
| |
| assertMockEndpointsSatisfied(); |
| |
| assertEquals("Bye World", out); |
| } |
| |
| @Override |
| protected RouteBuilder createRouteBuilder() throws Exception { |
| return new RouteBuilder() { |
| @Override |
| public void configure() throws Exception { |
| from("direct:start") |
| .process(new MyFailOverProcessor(template, "direct:a", "direct:b")); |
| |
| // always fail |
| from("direct:a").to("mock:a").process(new Processor() { |
| public void process(Exchange exchange) throws Exception { |
| throw new IOException("Forced"); |
| } |
| }); |
| |
| // return a constant response |
| from("direct:b").to("mock:b").transform(constant("Bye World")); |
| } |
| }; |
| } |
| |
| private class MyFailOverProcessor implements Processor { |
| |
| private List<String> uris; |
| private ProducerTemplate template; |
| |
| public MyFailOverProcessor(ProducerTemplate template, String... uris) { |
| this.template = template; |
| this.uris = Arrays.asList(uris); |
| } |
| |
| public void process(Exchange exchange) throws Exception { |
| for (String uri : uris) { |
| // reset exception to avoid it being a problem if/when we retry |
| exchange.setException(null); |
| |
| // send the exchange to the next uri in the failover list |
| template.send(uri, exchange); |
| |
| if (exchange.getException() == null) { |
| // processed okay so we are finished |
| return; |
| } |
| } |
| } |
| |
| } |
| |
| } |