TransactedAsyncExceptionTest.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.component.sjms.tx;

import java.lang.management.ManagementFactory;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.util.Arrays;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.camel.CamelContext;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.mock.MockEndpoint;
import org.apache.camel.component.sjms.SjmsComponent;
import org.apache.camel.test.junit4.CamelTestSupport;
import org.junit.Test;

public class TransactedAsyncExceptionTest extends CamelTestSupport {

    private static final String BROKER_URI = "vm://tqc_test_broker?broker.persistent=false&broker.useJmx=false";

    private static final int TRANSACTION_REDELIVERY_COUNT = 10;

    @Test
    public void testRouteWithThread() throws Exception {
        String destination = "sjms:queue:async.exception";

        context.addRoutes(new RouteBuilder() {
            @Override
            public void configure() throws Exception {
                AtomicInteger counter = new AtomicInteger();

                from(destination + "?acknowledgementMode=SESSION_TRANSACTED&transacted=true")
                    .threads()
                    .process(exchange -> {
                        if (counter.incrementAndGet() < TRANSACTION_REDELIVERY_COUNT) {
                            throw new IllegalArgumentException();
                        }
                    })
                    .to("mock:async.exception");
            }
        });

        template.sendBody(destination, "begin");

        MockEndpoint mockEndpoint = context.getEndpoint("mock:async.exception", MockEndpoint.class);

        mockEndpoint.expectedMessageCount(1);
        if (!mockEndpoint.await(getShutdownTimeout(), TimeUnit.SECONDS)) {
            dumpThreads();
        }
        assertMockEndpointsSatisfied(getShutdownTimeout(), TimeUnit.SECONDS);
    }

    private void dumpThreads() {
        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        for (ThreadInfo threadInfo : threadMXBean.getThreadInfo(threadMXBean.getAllThreadIds(), Integer.MAX_VALUE)) {
            if (Thread.State.BLOCKED.equals(threadInfo.getThreadState())) {
                log.error("blocked thread: {}", threadInfo);
            } else {
                log.info("normal thread: {}", threadInfo);
            }
            log.info("full stack: {}", Arrays.stream(threadInfo.getStackTrace()).map(Object::toString).collect(Collectors.joining("\n\t")));
        }
    }

    @Override
    protected CamelContext createCamelContext() throws Exception {
        CamelContext camelContext = super.createCamelContext();

        ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(BROKER_URI);

        connectionFactory.getRedeliveryPolicy().setInitialRedeliveryDelay(0);
        connectionFactory.getRedeliveryPolicy().setRedeliveryDelay(0);
        connectionFactory.getRedeliveryPolicy().setUseCollisionAvoidance(false);
        connectionFactory.getRedeliveryPolicy().setUseExponentialBackOff(false);
        connectionFactory.getRedeliveryPolicy().setMaximumRedeliveries(TRANSACTION_REDELIVERY_COUNT);

        SjmsComponent component = new SjmsComponent();
        component.setConnectionFactory(connectionFactory);
        camelContext.addComponent("sjms", component);

        return camelContext;
    }

    @Override
    protected int getShutdownTimeout() {
        return 2;
    }

}