PollEnrichBridgeErrorHandlerTest.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.enricher;

import org.apache.camel.Consumer;
import org.apache.camel.ContextTestSupport;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.impl.JndiRegistry;
import org.apache.camel.processor.aggregate.UseLatestAggregationStrategy;
import org.apache.camel.spi.PollingConsumerPollStrategy;
import org.junit.Test;

public class PollEnrichBridgeErrorHandlerTest extends ContextTestSupport {

    private MyPollingStrategy myPoll = new MyPollingStrategy();

    @Override
    protected JndiRegistry createRegistry() throws Exception {
        JndiRegistry jndi = super.createRegistry();
        jndi.bind("myPoll", myPoll);
        return jndi;
    }

    @Test
    public void testPollEnrichBridgeErrorHandler() throws Exception {
        getMockEndpoint("mock:dead").expectedMessageCount(1);
        getMockEndpoint("mock:result").expectedMessageCount(0);

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

        assertMockEndpointsSatisfied();

        assertEquals(1 + 3, myPoll.getCounter());

        Exception caught = getMockEndpoint("mock:dead").getExchanges().get(0).getProperty(Exchange.EXCEPTION_CAUGHT, Exception.class);
        assertNotNull(caught);
        assertEquals("Something went wrong", caught.getMessage());
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                // try at most 3 times and if still failing move to DLQ
                errorHandler(deadLetterChannel("mock:dead").maximumRedeliveries(3).redeliveryDelay(0));

                from("seda:start")
                    // bridge the error handler when doing a polling so we can let Camel's error handler decide what to do
                    .pollEnrich("file:target/foo?pollStrategy=#myPoll&consumer.bridgeErrorHandler=true", 10000, new UseLatestAggregationStrategy())
                    .to("mock:result");
            }
        };
    }

    private class MyPollingStrategy implements PollingConsumerPollStrategy {

        private int counter;

        @Override
        public boolean begin(Consumer consumer, Endpoint endpoint) {
            counter++;
            throw new IllegalArgumentException("Something went wrong");
        }

        @Override
        public void commit(Consumer consumer, Endpoint endpoint, int polledMessages) {
            // noop
        }

        @Override
        public boolean rollback(Consumer consumer, Endpoint endpoint, int retryCounter, Exception cause) throws Exception {
            return false;
        }

        public int getCounter() {
            return counter;
        }
    }
    
}