camel-2.8.x/camel-core/src/test/java/org/apache/camel/processor/DeadLetterChannelRedeliveryDelayPatternTest.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;
import org.apache.camel.component.mock.MockEndpoint;
import static org.apache.camel.builder.ProcessorBuilder.throwException;

/**
 * Unit test to verify delay pattern
 */
public class DeadLetterChannelRedeliveryDelayPatternTest extends ContextTestSupport {

    private static int counter;

    public void testDelayPatternTest() throws Exception {
        counter = 0;

        MockEndpoint mock = getMockEndpoint("mock:error");
        mock.expectedMessageCount(1);

        long start = System.currentTimeMillis();
        template.sendBody("direct:start", "Hello World");
        long delta = System.currentTimeMillis() - start;
        assertTrue("Should be slower", delta > 1000);

        assertMockEndpointsSatisfied();

        assertEquals(3, counter);
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            public void configure() throws Exception {
                errorHandler(deadLetterChannel("mock:error").delayPattern("0:250;2:500").maximumRedeliveries(3)
                    .onRedelivery(new Processor() {
                        public void process(Exchange exchange) throws Exception {
                            counter++;
                        }
                    }));

                from("direct:start").process(throwException(new Exception("Forced exception by unit test")));
            }
        };
    }

}