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;
  
  import javax.jms.MessageConsumer;
  import javax.jms.MessageProducer;
  import javax.jms.Queue;
  import javax.jms.Session;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.activemq.artemis.api.core.SimpleString;
  import org.apache.activemq.artemis.core.postoffice.Binding;
  import org.apache.activemq.artemis.core.server.impl.QueueImpl;
  import org.apache.activemq.artemiswrapper.ArtemisBrokerHelper;
  import org.apache.activemq.broker.artemiswrapper.ArtemisBrokerWrapper;
  import org.apache.activemq.util.Wait;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class OptimizedAckTest extends TestSupport {
  
     private static final Logger LOG = LoggerFactory.getLogger(OptimizedAckTest.class);
     private ActiveMQConnection connection;
  
     @Override
     protected void setUp() throws Exception {
        super.setUp();
        connection = (ActiveMQConnection) createConnection();
        connection.setOptimizeAcknowledge(true);
        connection.setOptimizeAcknowledgeTimeOut(0);
        ActiveMQPrefetchPolicy prefetchPolicy = new ActiveMQPrefetchPolicy();
        prefetchPolicy.setAll(10);
        connection.setPrefetchPolicy(prefetchPolicy);
     }
  
     @Override
     protected void tearDown() throws Exception {
        connection.close();
        super.tearDown();
     }
  
     public void testReceivedMessageStillInflight() throws Exception {
        connection.start();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        Queue queue = session.createQueue("test");
        MessageProducer producer = session.createProducer(queue);
        for (int i = 0; i < 10; i++) {
           producer.send(session.createTextMessage("Hello" + i));
        }
  
        MessageConsumer consumer = session.createConsumer(queue);
        //check queue delivering count is 10
        ArtemisBrokerWrapper broker = (ArtemisBrokerWrapper) ArtemisBrokerHelper.getBroker().getBroker();
        Binding binding = broker.getServer().getPostOffice().getBinding(SimpleString.of("test"));
  
        final QueueImpl coreQueue = (QueueImpl) binding.getBindable();
        assertTrue("delivering count is 10", Wait.waitFor(() -> 10 == coreQueue.getDeliveringCount()));
  
        for (int i = 0; i < 6; i++) {
           javax.jms.Message msg = consumer.receive(4000);
           assertNotNull(msg);
           assertEquals("all prefetch is still in flight: " + i, 10, coreQueue.getDeliveringCount());
        }
  
        for (int i = 6; i < 10; i++) {
           javax.jms.Message msg = consumer.receive(4000);
           assertNotNull(msg);
  
           assertTrue("most are acked but 3 remain", Wait.waitFor(() -> 3 == coreQueue.getDeliveringCount()));
        }
  
     }
  
     public void testVerySlowReceivedMessageStillInflight() throws Exception {
        connection.start();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        Queue queue = session.createQueue("test");
        MessageProducer producer = session.createProducer(queue);
        for (int i = 0; i < 10; i++) {
           producer.send(session.createTextMessage("Hello" + i));
        }
        MessageConsumer consumer = session.createConsumer(queue);
  
        //check queue delivering count is 10
        ArtemisBrokerWrapper broker = (ArtemisBrokerWrapper) ArtemisBrokerHelper.getBroker().getBroker();
        Binding binding = broker.getServer().getPostOffice().getBinding(SimpleString.of("test"));
  
        final QueueImpl coreQueue = (QueueImpl) binding.getBindable();
        assertTrue("prefetch full", Wait.waitFor(() -> 10 == coreQueue.getDeliveringCount()));
  
        for (int i = 0; i < 6; i++) {
           Thread.sleep(400);
           javax.jms.Message msg = consumer.receive(4000);
           assertNotNull(msg);
           assertEquals("all prefetch is still in flight: " + i, 10, coreQueue.getDeliveringCount());
        }
  
        for (int i = 6; i < 10; i++) {
           Thread.sleep(400);
           javax.jms.Message msg = consumer.receive(4000);
           assertNotNull(msg);
  
           assertTrue("most are acked but 3 remain", Wait.waitFor(() -> 3 == coreQueue.getDeliveringCount()));
        }
  
     }
  
     public void testReceivedMessageNotInFlightAfterScheduledAckFires() throws Exception {
        connection.setOptimizedAckScheduledAckInterval(TimeUnit.SECONDS.toMillis(10));
        connection.start();
        Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        Queue queue = session.createQueue("test");
        MessageProducer producer = session.createProducer(queue);
        for (int i = 0; i < 10; i++) {
           producer.send(session.createTextMessage("Hello" + i));
        }
  
        MessageConsumer consumer = session.createConsumer(queue);
        ArtemisBrokerWrapper broker = (ArtemisBrokerWrapper) ArtemisBrokerHelper.getBroker().getBroker();
        Binding binding = broker.getServer().getPostOffice().getBinding(SimpleString.of("test"));
  
        final QueueImpl coreQueue = (QueueImpl) binding.getBindable();
        assertTrue("prefetch full", Wait.waitFor(() -> 10 == coreQueue.getDeliveringCount()));
  
        for (int i = 0; i < 6; i++) {
           javax.jms.Message msg = consumer.receive(4000);
           assertNotNull(msg);
           assertEquals("all prefetch is still in flight: " + i, 10, coreQueue.getDeliveringCount());
        }
  
        for (int i = 6; i < 10; i++) {
           javax.jms.Message msg = consumer.receive(4000);
           assertNotNull(msg);
           assertTrue("most are acked but 3 remain", Wait.waitFor(() -> 3 == coreQueue.getDeliveringCount()));
        }
  
        assertTrue("After delay the scheduled ack should ack all inflight.", Wait.waitFor(() -> {
           LOG.info("inflight count: " + coreQueue.getDeliveringCount());
           return 0 == coreQueue.getDeliveringCount();
        }));
     }
  }
  