AggregatorExceptionInPredicateTest.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.aggregator;

import org.apache.camel.ContextTestSupport;
import org.apache.camel.Exchange;
import org.apache.camel.Expression;
import org.apache.camel.builder.ExpressionBuilder;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.processor.aggregate.AggregationStrategy;
import org.apache.camel.processor.aggregate.UseLatestAggregationStrategy;

/**
 * Based on CAMEL-1546
 *
 * @version 
 */
public class AggregatorExceptionInPredicateTest extends ContextTestSupport {

    public void testExceptionInAggregationStrategy() throws Exception {
        testExceptionInFlow("direct:start");
    }
    
    public void testExceptionInPredicate() throws Exception {
        testExceptionInFlow("direct:predicate");
    }
    
    private void testExceptionInFlow(String startUri) throws Exception {
        // failed first aggregation
        
        getMockEndpoint("mock:handled").expectedMessageCount(1);

        // second aggregated
        getMockEndpoint("mock:result").expectedBodiesReceived("Hello World");

        template.sendBodyAndHeader(startUri, "Damn", "id", 1);
        template.sendBodyAndHeader(startUri, "Hello World", "id", 1);

        assertMockEndpointsSatisfied();
    }

    @Override
    protected RouteBuilder createRouteBuilder() throws Exception {
        return new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                onException(IllegalArgumentException.class).handled(true).to("mock:handled");

                from("direct:start")
                    .aggregate(header("id"))
                    .completionTimeout(500)
                    .aggregationStrategy(new AggregationStrategy() {
                    
                        public Exchange aggregate(Exchange oldExchange, Exchange newExchange) {
                            Object body = newExchange.getIn().getBody();
                            if ("Damn".equals(body)) {
                                throw new IllegalArgumentException();
                            }
                            return newExchange;
                        }
                    })
                    .to("mock:result");

                from("direct:predicate")
                    .aggregate(new Expression() {
                    
                        public <T> T evaluate(Exchange exchange, Class<T> type) {
                            if (exchange.getIn().getBody().equals("Damn")) {
                                throw new IllegalArgumentException();
                            }
                            return ExpressionBuilder.headerExpression("id").evaluate(exchange, type);
                        }
                    }, new UseLatestAggregationStrategy())
                    .completionTimeout(500)
                    .to("mock:result");
            }
        };
    }
}