EnricherAggregateOnExceptionTest.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.CamelExecutionException;
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 org.apache.camel.processor.aggregate.AggregationStrategy;

/**
 * @version 
 */
public class EnricherAggregateOnExceptionTest extends ContextTestSupport {

    public void testEnrichTrueOk() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:result");
        mock.expectedBodiesReceived("Hello World");

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

        assertMockEndpointsSatisfied();
    }

    public void testEnrichTrueKaboom() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:result");
        mock.expectedBodiesReceived("I cannot do this");

        template.sendBody("direct:start", "Kaboom");

        assertMockEndpointsSatisfied();
    }

    public void testEnrichFalseOk() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:result");
        mock.expectedBodiesReceived("Hello World");

        template.sendBody("direct:start2", "World");

        assertMockEndpointsSatisfied();
    }

    public void testEnrichFalseKaboom() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:result");
        mock.expectedMessageCount(0);

        try {
            template.sendBody("direct:start2", "Kaboom");
            fail("Should have thrown exception");
        } catch (CamelExecutionException e) {
            assertIsInstanceOf(IllegalArgumentException.class, e.getCause());
            assertEquals("I cannot do this", e.getCause().getMessage());
        }

        assertMockEndpointsSatisfied();
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                from("direct:start")
                    .enrich("direct:foo", new MyAggregationStrategy(), true)
                    .to("mock:result");

                from("direct:start2")
                    .enrich("direct:foo", new MyAggregationStrategy(), false)
                    .to("mock:result");

                from("direct:foo")
                    .process(new MyProcessor());
            }
        };
    }

    public static class MyProcessor implements Processor {

        @Override
        public void process(Exchange exchange) throws Exception {
            String body = exchange.getIn().getBody(String.class);
            if (body.startsWith("Kaboom")) {
                throw new IllegalArgumentException("I cannot do this");
            }
            exchange.getIn().setBody("Hello " + body);
        }
    }

    public static class MyAggregationStrategy implements AggregationStrategy {

        @Override
        public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
            if (newExchange.getException() != null) {
                oldExchange.getIn().setBody(newExchange.getException().getMessage());
                return oldExchange;
            }

            // replace body
            oldExchange.getIn().setBody(newExchange.getIn().getBody());
            return oldExchange;
        }
    }
}