content: /*
   * 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.activemq.transport.failover;
  
  import javax.jms.DeliveryMode;
  import javax.jms.JMSException;
  import javax.jms.MessageConsumer;
  import javax.jms.MessageProducer;
  import javax.jms.Session;
  import javax.jms.TextMessage;
  import java.io.IOException;
  import java.net.URI;
  import java.net.URISyntaxException;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicBoolean;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import org.apache.activemq.ActiveMQConnection;
  import org.apache.activemq.ActiveMQConnectionFactory;
  import org.apache.activemq.artemis.core.config.Configuration;
  import org.apache.activemq.artemis.jms.server.config.impl.JMSConfigurationImpl;
  import org.apache.activemq.artemis.jms.server.embedded.EmbeddedJMS;
  import org.apache.activemq.broker.artemiswrapper.OpenwireArtemisBaseTest;
  import org.apache.activemq.command.ActiveMQQueue;
  import org.apache.activemq.transport.TransportListener;
  import org.apache.activemq.transport.mock.MockTransport;
  import org.apache.activemq.util.Wait;
  import org.junit.After;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class ReconnectTest extends OpenwireArtemisBaseTest {
  
     public static final int MESSAGES_PER_ITTERATION = 10;
     public static final int WORKER_COUNT = 10;
  
     private static final Logger LOG = LoggerFactory.getLogger(ReconnectTest.class);
  
     private EmbeddedJMS bs;
     private URI tcpUri;
     private final AtomicInteger resumedCount = new AtomicInteger();
     private final AtomicInteger interruptedCount = new AtomicInteger();
     private Worker[] workers;
  
     class Worker implements Runnable {
  
        public AtomicInteger iterations = new AtomicInteger();
        public CountDownLatch stopped = new CountDownLatch(1);
  
        private final ActiveMQConnection connection;
        private final AtomicBoolean stop = new AtomicBoolean(false);
        private Throwable error;
        private final String name;
  
        public Worker(final String name) throws URISyntaxException, JMSException {
           this.name = name;
           URI uri = new URI("failover://(mock://(" + tcpUri + "))?updateURIsSupported=false");
           ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(uri);
           connection = (ActiveMQConnection) factory.createConnection();
           connection.addTransportListener(new TransportListener() {
              @Override
              public void onCommand(Object command) {
              }
  
              @Override
              public void onException(IOException error) {
                 setError(error);
              }
  
              @Override
              public void transportInterupted() {
                 LOG.info("Worker " + name + " was interrupted...");
                 interruptedCount.incrementAndGet();
              }
  
              @Override
              public void transportResumed() {
                 LOG.info("Worker " + name + " was resummed...");
                 resumedCount.incrementAndGet();
              }
           });
           connection.start();
        }
  
        public void failConnection() {
           MockTransport mockTransport = connection.getTransportChannel().narrow(MockTransport.class);
           mockTransport.onException(new IOException("Simulated error"));
        }
  
        public void start() {
           new Thread(this, name).start();
        }
  
        public void stop() {
           stop.set(true);
           try {
              if (!stopped.await(5, TimeUnit.SECONDS)) {
                 connection.close();
                 stopped.await(5, TimeUnit.SECONDS);
              } else {
                 connection.close();
              }
           } catch (Exception e) {
              e.printStackTrace();
           }
        }
  
        @Override
        public void run() {
           try {
              ActiveMQQueue queue = new ActiveMQQueue("FOO_" + name);
              Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
              MessageConsumer consumer = session.createConsumer(queue);
              MessageProducer producer = session.createProducer(queue);
              producer.setDeliveryMode(DeliveryMode.PERSISTENT);
  
              while (!stop.get()) {
  
                 for (int i = 0; i < MESSAGES_PER_ITTERATION; i++) {
                    TextMessage text = session.createTextMessage(name + " TEST:" + i);
                    text.setStringProperty("myprop", name + " TEST:" + i);
                    producer.send(text);
                 }
  
                 for (int i = 0; i < MESSAGES_PER_ITTERATION; i++) {
                    TextMessage m = (TextMessage) consumer.receive();
                 }
  
                 iterations.incrementAndGet();
              }
              session.close();
           } catch (JMSException e) {
              setError(e);
           } finally {
              stopped.countDown();
           }
        }
  
        public synchronized Throwable getError() {
           return error;
        }
  
        public synchronized void setError(Throwable error) {
           this.error = error;
        }
  
        public synchronized void assertNoErrors() {
           if (error != null) {
              error.printStackTrace();
              Assert.fail("Worker " + name + " got Exception: " + error);
           }
        }
     }
  
     @Test
     public void testReconnects() throws Exception {
  
        for (int k = 1; k < 10; k++) {
           LOG.info("Test run: " + k);
  
           // Wait for at least one iteration to occur...
           for (int i = 0; i < WORKER_COUNT; i++) {
              int c = 0;
              for (int j = 0; j < 30; j++) {
                 c = workers[i].iterations.getAndSet(0);
                 if (c != 0) {
                    break;
                 }
                 workers[i].assertNoErrors();
                 LOG.info("Test run " + k + ": Waiting for worker " + i + " to finish an iteration.");
                 Thread.sleep(1000);
              }
              Assert.assertTrue("Test run " + k + ": Worker " + i + " never completed an interation.", c != 0);
              workers[i].assertNoErrors();
           }
  
           LOG.info("Simulating transport error to cause reconnect.");
  
           // Simulate a transport failure.
           for (int i = 0; i < WORKER_COUNT; i++) {
              workers[i].failConnection();
           }
  
           Assert.assertTrue("Timed out waiting for all connections to be interrupted.", Wait.waitFor(() -> {
              LOG.debug("Test run waiting for connections to get interrupted.. at: " + interruptedCount.get());
              return interruptedCount.get() == WORKER_COUNT;
           }, TimeUnit.SECONDS.toMillis(60)));
  
           // Wait for the connections to re-establish...
           Assert.assertTrue("Timed out waiting for all connections to be resumed.", Wait.waitFor(() -> {
              LOG.debug("Test run waiting for connections to get resumed.. at: " + resumedCount.get());
              return resumedCount.get() >= WORKER_COUNT;
           }, TimeUnit.SECONDS.toMillis(60)));
  
           // Reset the counters..
           interruptedCount.set(0);
           resumedCount.set(0);
           for (int i = 0; i < WORKER_COUNT; i++) {
              workers[i].iterations.set(0);
           }
  
           Thread.sleep(1000);
        }
     }
  
     @Before
     public void setUp() throws Exception {
        Configuration config = createConfig(0);
        bs = new EmbeddedJMS().setConfiguration(config).setJmsConfiguration(new JMSConfigurationImpl());
        bs.start();
        tcpUri = new URI(newURI(0));
  
        workers = new Worker[WORKER_COUNT];
        for (int i = 0; i < WORKER_COUNT; i++) {
           workers[i] = new Worker("worker-" + i);
           workers[i].start();
        }
     }
  
     @After
     public void tearDown() throws Exception {
        for (int i = 0; i < WORKER_COUNT; i++) {
           workers[i].stop();
        }
        bs.stop();
     }
  }
  