/**
 * 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.ConnectionFactory;
import javax.jms.ExceptionListener;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.ResourceAllocationException;
import javax.jms.Session;
import javax.jms.TextMessage;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.broker.region.policy.VMPendingQueueMessageStoragePolicy;
import org.apache.activemq.broker.region.policy.VMPendingSubscriberMessageStoragePolicy;

public class ProducerFlowControlSendFailTest extends ProducerFlowControlTest {

   @Override
   protected BrokerService createBroker() throws Exception {
      BrokerService service = new BrokerService();
      service.setPersistent(false);
      service.setUseJmx(false);

      // Setup a destination policy where it takes only 1 message at a time.
      PolicyMap policyMap = new PolicyMap();
      PolicyEntry policy = new PolicyEntry();
      policy.setMemoryLimit(1);
      policy.setPendingSubscriberPolicy(new VMPendingSubscriberMessageStoragePolicy());
      policy.setPendingQueuePolicy(new VMPendingQueueMessageStoragePolicy());
      policy.setProducerFlowControl(true);
      policyMap.setDefaultEntry(policy);
      service.setDestinationPolicy(policyMap);

      service.getSystemUsage().setSendFailIfNoSpace(true);

      connector = service.addConnector("tcp://localhost:0");
      return service;
   }

   @Override
   public void test2ndPublisherWithStandardConnectionThatIsBlocked() throws Exception {
      // with sendFailIfNoSpace set, there is no blocking of the connection
   }

   @Override
   public void testAsyncPublisherRecoverAfterBlock() throws Exception {
      // sendFail means no flowControllwindow as there is no producer ack, just an exception
   }

   @Override
   public void testPublisherRecoverAfterBlock() throws Exception {
      ActiveMQConnectionFactory factory = (ActiveMQConnectionFactory) createConnectionFactory();
      // with sendFail, there must be no flowControllwindow
      // sendFail is an alternative flow control mechanism that does not block
      factory.setUseAsyncSend(true);
      connection = (ActiveMQConnection) factory.createConnection();
      connections.add(connection);
      connection.start();

      final Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      final MessageProducer producer = session.createProducer(queueA);

      final AtomicBoolean keepGoing = new AtomicBoolean(true);

      Thread thread = new Thread("Filler") {
         @Override
         public void run() {
            while (keepGoing.get()) {
               try {
                  producer.send(session.createTextMessage("Test message"));
                  if (gotResourceException.get()) {
                     // do not flood the broker with requests when full as we are sending async and they
                     // will be limited by the network buffers
                     Thread.sleep(200);
                  }
               } catch (Exception e) {
                  // with async send, there will be no exceptions
                  e.printStackTrace();
               }
            }
         }
      };
      thread.start();
      waitForBlockedOrResourceLimit(new AtomicBoolean(false));

      // resourceException on second message, resumption if we
      // can receive 10
      MessageConsumer consumer = session.createConsumer(queueA);
      TextMessage msg;
      for (int idx = 0; idx < 10; ++idx) {
         msg = (TextMessage) consumer.receive(1000);
         if (msg != null) {
            msg.acknowledge();
         }
      }
      keepGoing.set(false);
   }

   public void testPublisherRecoverAfterBlockWithSyncSend() throws Exception {
      ActiveMQConnectionFactory factory = (ActiveMQConnectionFactory) createConnectionFactory();
      factory.setExceptionListener(null);
      factory.setUseAsyncSend(false);
      connection = (ActiveMQConnection) factory.createConnection();
      connections.add(connection);
      connection.start();

      final Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      final MessageProducer producer = session.createProducer(queueA);

      final AtomicBoolean keepGoing = new AtomicBoolean(true);
      final AtomicInteger exceptionCount = new AtomicInteger(0);
      Thread thread = new Thread("Filler") {
         @Override
         public void run() {
            while (keepGoing.get()) {
               try {
                  producer.send(session.createTextMessage("Test message"));
               } catch (JMSException arg0) {
                  if (arg0 instanceof ResourceAllocationException) {
                     gotResourceException.set(true);
                     exceptionCount.incrementAndGet();
                  }
               }
            }
         }
      };
      thread.start();
      waitForBlockedOrResourceLimit(new AtomicBoolean(false));

      // resourceException on second message, resumption if we
      // can receive 10
      MessageConsumer consumer = session.createConsumer(queueA);
      TextMessage msg;
      for (int idx = 0; idx < 10; ++idx) {
         msg = (TextMessage) consumer.receive(1000);
         if (msg != null) {
            msg.acknowledge();
         }
      }
      assertTrue("we were blocked at least 5 times", 5 < exceptionCount.get());
      keepGoing.set(false);
   }

   @Override
   protected ConnectionFactory createConnectionFactory() throws Exception {
      ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(connector.getConnectUri());
      connectionFactory.setExceptionListener(new ExceptionListener() {
         @Override
         public void onException(JMSException arg0) {
            if (arg0 instanceof ResourceAllocationException) {
               gotResourceException.set(true);
            }
         }
      });
      return connectionFactory;
   }
}
