DeadLetterChannelOnPrepareTest.java

/**
 * 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 org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;

public class DeadLetterChannelOnPrepareTest extends ContextTestSupport {

    public void testDeadLetterChannelOnPrepare() throws Exception {
        getMockEndpoint("mock:dead").expectedBodiesReceived("Hello World");
        getMockEndpoint("mock:dead").expectedHeaderReceived("FailedBecause", "Forced");

        template.sendBody("direct:start", "Hello World");

        assertMockEndpointsSatisfied();
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                errorHandler(deadLetterChannel("mock:dead").onPrepareFailure(new MyPrepareProcessor()));

                from("direct:start")
                    .log("Incoming ${body}")
                    .throwException(new IllegalArgumentException("Forced"));
            }
        };
    }

    public static class MyPrepareProcessor implements Processor {

        @Override
        public void process(Exchange exchange) throws Exception {
            Exception cause = exchange.getProperty(Exchange.EXCEPTION_CAUGHT, Exception.class);
            exchange.getIn().setHeader("FailedBecause", cause.getMessage());
        }
    }
}