com.datatorrent.lib.io.jms.JMSStringInputOperatorTest.java Source code

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Here is the source code for com.datatorrent.lib.io.jms.JMSStringInputOperatorTest.java

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/**
 * 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 com.datatorrent.lib.io.jms;

import java.io.File;

import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.junit.Assert;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestWatcher;
import org.junit.runner.Description;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.commons.io.FileUtils;

import com.datatorrent.api.Attribute;
import com.datatorrent.api.Context;
import com.datatorrent.lib.helper.OperatorContextTestHelper;
import com.datatorrent.lib.testbench.CollectorTestSink;

/**
 * Tests for {@link JMSStringInputOperator}
 */
public class JMSStringInputOperatorTest {
    public static class TestMeta extends TestWatcher {
        String baseDir;
        JMSStringInputOperator operator;
        CollectorTestSink<Object> sink;
        Context.OperatorContext context;
        JMSTestBase testBase;

        @Override
        protected void starting(Description description) {
            testBase = new JMSTestBase();
            try {
                testBase.beforTest();
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
            String methodName = description.getMethodName();
            String className = description.getClassName();
            baseDir = "target/" + className + "/" + methodName;

            Attribute.AttributeMap attributeMap = new Attribute.AttributeMap.DefaultAttributeMap();
            attributeMap.put(Context.OperatorContext.SPIN_MILLIS, 500);
            attributeMap.put(Context.DAGContext.APPLICATION_PATH, baseDir);

            context = new OperatorContextTestHelper.TestIdOperatorContext(1, attributeMap);
            operator = new JMSStringInputOperator();
            operator.setSubject("TEST.FOO");
            operator.getConnectionFactoryProperties().put(JMSTestBase.AMQ_BROKER_URL, "vm://localhost");

            sink = new CollectorTestSink<>();
            operator.output.setSink(sink);
            operator.setup(context);
            operator.activate(context);
        }

        @Override
        protected void finished(Description description) {
            operator.deactivate();
            operator.teardown();
            try {
                FileUtils.deleteDirectory(new File("target/" + description.getClassName()));
                testBase.afterTest();
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

    @Rule
    public TestMeta testMeta = new TestMeta();

    @Test
    public void testStringMsgInput() throws Exception {
        produceMsg(10);
        Thread.sleep(1000);
        testMeta.operator.emitTuples();
        Assert.assertEquals("num of messages", 10, testMeta.sink.collectedTuples.size());
    }

    @Test
    public void testRecoveryAndIdempotency() throws Exception {
        produceMsg(100);
        Thread.sleep(1000);
        testMeta.operator.beginWindow(1);
        testMeta.operator.emitTuples();
        testMeta.operator.endWindow();

        //failure and then re-deployment of operator
        testMeta.sink.collectedTuples.clear();
        testMeta.operator.setup(testMeta.context);
        testMeta.operator.activate(testMeta.context);

        Assert.assertEquals("largest recovery window", 1,
                testMeta.operator.getWindowDataManager().getLargestCompletedWindow());

        testMeta.operator.beginWindow(1);
        testMeta.operator.endWindow();
        Assert.assertEquals("num of messages in window 1", 100, testMeta.sink.collectedTuples.size());
        testMeta.sink.collectedTuples.clear();
    }

    private void produceMsg(int numMessages) throws Exception {
        // Create a ConnectionFactory
        ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("vm://localhost");

        // Create a Connection
        Connection connection = connectionFactory.createConnection();
        connection.start();

        // Create a Session
        Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);

        // Create the destination (Topic or Queue)
        Destination destination = session.createQueue("TEST.FOO");

        // Create a MessageProducer from the Session to the Topic or Queue
        MessageProducer producer = session.createProducer(destination);
        producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);

        // Create a messages
        String text = "Hello world! From tester producer";
        TextMessage message = session.createTextMessage(text);
        for (int i = 0; i < numMessages; i++) {
            producer.send(message);
        }

        // Clean up
        session.close();
        connection.close();

    }

    private static final transient Logger LOG = LoggerFactory.getLogger(JMSStringInputOperatorTest.class);
}