MulticastRedeliverTest.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.CamelExecutionException;
import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;

/**
 *
 */
public class MulticastRedeliverTest extends ContextTestSupport {

    private static int counter;

    public void testOk() throws Exception {
        getMockEndpoint("mock:a").expectedMessageCount(1);
        getMockEndpoint("mock:b").expectedMessageCount(1);

        template.sendBody("direct:test1", "Hello World");

        assertMockEndpointsSatisfied();
    }

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

        getMockEndpoint("mock:a").expectedMessageCount(1);
        getMockEndpoint("mock:b").expectedMessageCount(0);

        try {
            template.sendBody("direct:test2", "Hello World");
            fail("Should have thrown exception");
        } catch (CamelExecutionException e) {
            assertEquals("Forced", e.getCause().getCause().getMessage());
        }

        assertMockEndpointsSatisfied();

        assertEquals(1 + 3, counter); // first call + 3 redeliveries
    }

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

        getMockEndpoint("mock:a").expectedMessageCount(1);
        getMockEndpoint("mock:b").expectedMessageCount(1);
        getMockEndpoint("mock:c").expectedMessageCount(0);

        try {
            template.sendBody("direct:test3", "Hello World");
            fail("Should have thrown exception");
        } catch (CamelExecutionException e) {
            assertEquals("Forced", e.getCause().getCause().getMessage());
        }

        assertMockEndpointsSatisfied();

        assertEquals(1 + 3, counter); // first call + 3 redeliveries
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                // try to redeliver up till 3 times
                errorHandler(defaultErrorHandler().maximumRedeliveries(3).redeliveryDelay(0));

                from("direct:test1")
                    .multicast().stopOnException()
                        .to("mock:a").to("mock:b");

                from("direct:test2")
                    .multicast().stopOnException()
                        .to("mock:a").to("direct:a").to("mock:b");

                from("direct:test3")
                    .multicast().stopOnException()
                        .to("mock:a").to("mock:b").to("direct:b").to("mock:c");

                from("direct:a")
                    .process(new Processor() {
                        @Override
                        public void process(Exchange exchange) throws Exception {
                            // should be same input body
                            assertEquals("Hello World", exchange.getIn().getBody());
                            assertFalse("Should not have OUT", exchange.hasOut());
                            assertNull(exchange.getException());

                            counter++;
                            throw new IllegalArgumentException("Forced");
                        }
                    });

                from("direct:b")
                    .process(new Processor() {
                        @Override
                        public void process(Exchange exchange) throws Exception {
                            // should be same input body
                            assertEquals("Hello World", exchange.getIn().getBody());
                            assertFalse("Should not have OUT", exchange.hasOut());
                            assertNull(exchange.getException());

                            // mutate OUT body
                            exchange.getOut().setBody("Bye World");

                            counter++;
                            throw new IllegalArgumentException("Forced");
                        }
                    });
            }
        };
    }

}