| /** |
| * 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.Map; |
| |
| import org.apache.camel.Body; |
| import org.apache.camel.ContextTestSupport; |
| import org.apache.camel.Headers; |
| import org.apache.camel.OutHeaders; |
| import org.apache.camel.builder.RouteBuilder; |
| import org.apache.camel.component.mock.MockEndpoint; |
| |
| /** |
| * Unit test to verify that handled policy is working as expected for wiki documentation. |
| */ |
| public class DeadLetterChannelHandledExampleTest extends ContextTestSupport { |
| |
| public void testOrderOK() throws Exception { |
| MockEndpoint result = getMockEndpoint("mock:result"); |
| result.expectedBodiesReceived("Order OK"); |
| result.expectedHeaderReceived("orderid", "123"); |
| |
| MockEndpoint error = getMockEndpoint("mock:error"); |
| error.expectedMessageCount(0); |
| |
| Object out = template.requestBodyAndHeader("direct:start", "Order: MacBook Pro", "customerid", "444"); |
| assertEquals("Order OK", out); |
| |
| assertMockEndpointsSatisfied(); |
| } |
| |
| public void testOrderERROR() throws Exception { |
| MockEndpoint error = getMockEndpoint("mock:error"); |
| error.expectedBodiesReceived("Order ERROR"); |
| error.expectedHeaderReceived("orderid", "failed"); |
| |
| MockEndpoint result = getMockEndpoint("mock:result"); |
| result.expectedMessageCount(0); |
| |
| Object out = template.requestBodyAndHeader("direct:start", "Order: kaboom", "customerid", "555"); |
| assertEquals("Order ERROR", out); |
| |
| assertMockEndpointsSatisfied(); |
| } |
| |
| protected RouteBuilder createRouteBuilder() throws Exception { |
| return new RouteBuilder() { |
| public void configure() throws Exception { |
| // START SNIPPET: e1 |
| // we do special error handling for when OrderFailedException is thrown |
| onException(OrderFailedException.class) |
| // we mark the exchange as handled so the caller doesn't receive the |
| // OrderFailedException but whatever we want to return instead |
| .handled(true) |
| // this bean handles the error handling where we can customize the error |
| // response using java code |
| .bean(OrderService.class, "orderFailed") |
| // and since this is an unit test we use mocks for testing |
| .to("mock:error"); |
| |
| // this is just the generic error handler where we set the destination |
| // and the number of redeliveries we want to try |
| errorHandler(deadLetterChannel("mock:error").maximumRedeliveries(1)); |
| |
| // this is our route where we handle orders |
| from("direct:start") |
| // this bean is our order service |
| .bean(OrderService.class, "handleOrder") |
| // this is the destination if the order is OK |
| .to("mock:result"); |
| // END SNIPPET: e1 |
| } |
| }; |
| } |
| |
| // START SNIPPET: e2 |
| /** |
| * Order service as a plain POJO class |
| */ |
| public static class OrderService { |
| |
| /** |
| * This method handle our order input and return the order |
| * |
| * @param in the in headers |
| * @param payload the in payload |
| * @param out the out headers |
| * @return the out payload |
| * @throws OrderFailedException is thrown if the order cannot be processed |
| */ |
| @SuppressWarnings("unchecked") |
| public Object handleOrder(@Headers Map in, @Body String payload, @OutHeaders Map out) |
| throws OrderFailedException { |
| out.put("customerid", in.get("customerid")); |
| if ("Order: kaboom".equals(payload)) { |
| throw new OrderFailedException("Cannot order: kaboom"); |
| } else { |
| out.put("orderid", "123"); |
| return "Order OK"; |
| } |
| } |
| |
| /** |
| * This method creates the response to the caller if the order could not be processed |
| * @param in the in headers |
| * @param payload the in payload |
| * @param out the out headers |
| * @return the out payload |
| */ |
| @SuppressWarnings("unchecked") |
| public Object orderFailed(@Headers Map in, @Body String payload, @OutHeaders Map out) { |
| out.put("customerid", in.get("customerid")); |
| out.put("orderid", "failed"); |
| return "Order ERROR"; |
| } |
| } |
| // END SNIPPET: e2 |
| |
| // START SNIPPET: e3 |
| /** |
| * Exception thrown if the order cannot be processed |
| */ |
| public static class OrderFailedException extends Exception { |
| |
| public OrderFailedException(String message) { |
| super(message); |
| } |
| |
| } |
| // END SNIPPET: e3 |
| |
| } |