Package org.apache.camel.processor.jpa

Source Code of org.apache.camel.processor.jpa.JpaIdempotentConsumerTest

/**
* 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.jpa;

import java.util.List;

import org.apache.camel.CamelContext;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.Message;
import org.apache.camel.Processor;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.processor.idempotent.jpa.MessageProcessed;
import org.apache.camel.spring.SpringCamelContext;
import org.apache.camel.spring.SpringRouteBuilder;
import org.apache.camel.test.junit4.CamelTestSupport;
import org.junit.Before;
import org.junit.Test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.orm.jpa.JpaTemplate;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;

import static org.apache.camel.processor.idempotent.jpa.JpaMessageIdRepository.jpaMessageIdRepository;

/**
* @version $Revision: 785229 $
*/
public class JpaIdempotentConsumerTest extends CamelTestSupport {
    protected static final String SELECT_ALL_STRING = "select x from " + MessageProcessed.class.getName() + " x where x.processorName = ?1";
    protected static final String PROCESSOR_NAME = "myProcessorName";

    protected ApplicationContext applicationContext;
    protected JpaTemplate jpaTemplate;
    protected Endpoint startEndpoint;
    protected MockEndpoint resultEndpoint;

    @Override
    protected CamelContext createCamelContext() throws Exception {
        applicationContext = new ClassPathXmlApplicationContext("org/apache/camel/processor/jpa/spring.xml");
        cleanupRepository();
        return SpringCamelContext.springCamelContext(applicationContext);
    }

    @Override
    public boolean isUseRouteBuilder() {
        return false;
    }

    protected void cleanupRepository() {
        jpaTemplate = (JpaTemplate)applicationContext.getBean("jpaTemplate", JpaTemplate.class);

        TransactionTemplate transactionTemplate = new TransactionTemplate();
        transactionTemplate.setTransactionManager(new JpaTransactionManager(jpaTemplate.getEntityManagerFactory()));
        transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);

        transactionTemplate.execute(new TransactionCallback() {
            public Object doInTransaction(TransactionStatus arg0) {
                List list = jpaTemplate.find(SELECT_ALL_STRING, PROCESSOR_NAME);
                for (Object item : list) {
                    jpaTemplate.remove(item);
                }
                jpaTemplate.flush();
                return Boolean.TRUE;
            }
        });
    }

    @Override
    @Before
    public void setUp() throws Exception {
        super.setUp();
        startEndpoint = resolveMandatoryEndpoint("direct:start");
        resultEndpoint = getMockEndpoint("mock:result");
    }

    @Test
    public void testDuplicateMessagesAreFilteredOut() throws Exception {
        context.addRoutes(new SpringRouteBuilder() {
            @Override
            public void configure() throws Exception {
                // START SNIPPET: idempotent
                from("direct:start").idempotentConsumer(
                        header("messageId"),
                        jpaMessageIdRepository(lookup(JpaTemplate.class), PROCESSOR_NAME)
                ).to("mock:result");
                // END SNIPPET: idempotent
            }
        });
        context.start();

        resultEndpoint.expectedBodiesReceived("one", "two", "three");

        sendMessage("1", "one");
        sendMessage("2", "two");
        sendMessage("1", "one");
        sendMessage("2", "two");
        sendMessage("1", "one");
        sendMessage("3", "three");

        assertMockEndpointsSatisfied();
    }

    @Test
    public void testFailedExchangesNotAdded() throws Exception {
        context.addRoutes(new SpringRouteBuilder() {
            @Override
            public void configure() throws Exception {
                errorHandler(deadLetterChannel("mock:error").maximumRedeliveries(2).redeliverDelay(0).logStackTrace(false).handled(false));

                from("direct:start").idempotentConsumer(
                        header("messageId"),
                        jpaMessageIdRepository(lookup(JpaTemplate.class), PROCESSOR_NAME)
                ).process(new Processor() {
                    public void process(Exchange exchange) throws Exception {
                        String id = exchange.getIn().getHeader("messageId", String.class);
                        if (id.equals("2")) {
                            throw new IllegalArgumentException("Damm I cannot handle id 2");
                        }
                    }
                }).to("mock:result");
            }
        });
        context.start();

        // we send in 2 messages with id 2 that fails
        getMockEndpoint("mock:error").expectedMessageCount(2);
        resultEndpoint.expectedBodiesReceived("one", "three");

        sendMessage("1", "one");
        sendMessage("2", "two");
        sendMessage("1", "one");
        sendMessage("2", "two");
        sendMessage("1", "one");
        sendMessage("3", "three");

        assertMockEndpointsSatisfied();
    }

    protected void sendMessage(final Object messageId, final Object body) {
        template.send(startEndpoint, new Processor() {
            public void process(Exchange exchange) {
                // now lets fire in a message
                Message in = exchange.getIn();
                in.setBody(body);
                in.setHeader("messageId", messageId);
            }
        });
    }

}
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