/**
 * 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.broker.policy;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.management.InstanceNotFoundException;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.TabularData;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.Arrays;
import java.util.Collection;
import java.util.Map.Entry;
import java.util.concurrent.TimeUnit;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.ActiveMQMessageConsumer;
import org.apache.activemq.ActiveMQPrefetchPolicy;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.broker.jmx.AbortSlowConsumerStrategyViewMBean;
import org.apache.activemq.broker.jmx.DestinationViewMBean;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.util.MessageIdList;
import org.apache.activemq.util.SocketProxy;
import org.apache.activemq.util.Wait;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

@RunWith(value = Parameterized.class)
public class AbortSlowConsumer0Test extends AbortSlowConsumerBase {

   private static final Logger LOG = LoggerFactory.getLogger(AbortSlowConsumer0Test.class);

   @Parameterized.Parameters(name = "isTopic({0})")
   public static Collection<Object[]> getTestParameters() {
      return Arrays.asList(new Object[][]{{Boolean.TRUE}, {Boolean.FALSE}});
   }

   public AbortSlowConsumer0Test(Boolean isTopic) {
      this.topic = isTopic;
   }

   @Test
   public void testRegularConsumerIsNotAborted() throws Exception {
      startConsumers(destination);
      for (Connection c : connections) {
         c.setExceptionListener(this);
      }
      startProducers(destination, 100);
      allMessagesList.waitForMessagesToArrive(10);
      allMessagesList.assertAtLeastMessagesReceived(10);
   }

   @Test
   public void testSlowConsumerIsAbortedViaJmx() throws Exception {
      underTest.setMaxSlowDuration(60 * 1000); // so jmx does the abort
      startConsumers(withPrefetch(2, destination));
      Entry<MessageConsumer, MessageIdList> consumertoAbort = consumers.entrySet().iterator().next();
      consumertoAbort.getValue().setProcessingDelay(8 * 1000);
      for (Connection c : connections) {
         c.setExceptionListener(this);
      }
      startProducers(destination, 100);

      consumertoAbort.getValue().assertMessagesReceived(1);

      ActiveMQDestination amqDest = (ActiveMQDestination) destination;
      ObjectName destinationViewMBean = new ObjectName("org.apache.activemq:destinationType=" +
                                                          (amqDest.isTopic() ? "Topic" : "Queue") + ",destinationName=" + amqDest.getPhysicalName() + ",type=Broker,brokerName=localhost");

      DestinationViewMBean queue = (DestinationViewMBean) broker.getManagementContext().newProxyInstance(destinationViewMBean, DestinationViewMBean.class, true);
      ObjectName slowConsumerPolicyMBeanName = queue.getSlowConsumerStrategy();

      assertNotNull(slowConsumerPolicyMBeanName);

      AbortSlowConsumerStrategyViewMBean abortPolicy = (AbortSlowConsumerStrategyViewMBean) broker.getManagementContext().newProxyInstance(slowConsumerPolicyMBeanName, AbortSlowConsumerStrategyViewMBean.class, true);

      TimeUnit.SECONDS.sleep(3);

      TabularData slowOnes = abortPolicy.getSlowConsumers();
      assertEquals("one slow consumers", 1, slowOnes.size());

      LOG.info("slow ones:" + slowOnes);

      CompositeData slowOne = (CompositeData) slowOnes.values().iterator().next();
      LOG.info("Slow one: " + slowOne);

      assertTrue("we have an object name", slowOne.get("subscription") instanceof ObjectName);
      abortPolicy.abortConsumer((ObjectName) slowOne.get("subscription"));

      consumertoAbort.getValue().assertAtMostMessagesReceived(1);

      slowOnes = abortPolicy.getSlowConsumers();
      assertEquals("no slow consumers left", 0, slowOnes.size());

      // verify mbean gone with destination
      broker.getAdminView().removeTopic(amqDest.getPhysicalName());

      try {
         abortPolicy.getSlowConsumers();
         fail("expect not found post destination removal");
      } catch (UndeclaredThrowableException expected) {
         assertTrue("correct exception: " + expected.getCause(), expected.getCause() instanceof InstanceNotFoundException);
      }
   }

   private Destination withPrefetch(int i, Destination destination) {
      String destWithPrefetch = ((ActiveMQDestination) destination).getPhysicalName() + "?consumer.prefetchSize=" + i;
      return topic ? new ActiveMQTopic(destWithPrefetch) : new ActiveMQQueue(destWithPrefetch);
   }

   @Test
   public void testOnlyOneSlowConsumerIsAborted() throws Exception {
      consumerCount = 10;
      startConsumers(destination);
      Entry<MessageConsumer, MessageIdList> consumertoAbort = consumers.entrySet().iterator().next();
      consumertoAbort.getValue().setProcessingDelay(8 * 1000);
      for (Connection c : connections) {
         c.setExceptionListener(this);
      }
      startProducers(destination, 100);

      allMessagesList.waitForMessagesToArrive(99);
      allMessagesList.assertAtLeastMessagesReceived(99);

      consumertoAbort.getValue().assertMessagesReceived(1);
      TimeUnit.SECONDS.sleep(5);
      consumertoAbort.getValue().assertAtMostMessagesReceived(1);
   }

   @Test
   public void testAbortAlreadyClosingConsumers() throws Exception {
      consumerCount = 1;
      startConsumers(withPrefetch(2, destination));
      for (MessageIdList list : consumers.values()) {
         list.setProcessingDelay(6 * 1000);
      }
      for (Connection c : connections) {
         c.setExceptionListener(this);
      }
      startProducers(destination, 100);
      allMessagesList.waitForMessagesToArrive(consumerCount);

      for (MessageConsumer consumer : consumers.keySet()) {
         LOG.info("closing consumer: " + consumer);
         /// will block waiting for on message till 6secs expire
         consumer.close();
      }
   }

   @Test
   public void testAbortConsumerOnDeadConnection() throws Exception {
      TransportConnector transportConnector = broker.addConnector("tcp://0.0.0.0:0");
      transportConnector.setBrokerService(broker);
      transportConnector.setTaskRunnerFactory(broker.getTaskRunnerFactory());
      transportConnector.start();
      SocketProxy socketProxy = new SocketProxy(transportConnector.getPublishableConnectURI());
      ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(socketProxy.getUrl());
      ActiveMQPrefetchPolicy prefetchPolicy = new ActiveMQPrefetchPolicy();
      prefetchPolicy.setAll(4);
      connectionFactory.setPrefetchPolicy(prefetchPolicy);
      Connection c = connectionFactory.createConnection();
      connections.add(c);
      c.start();
      Session session = c.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      final ActiveMQMessageConsumer messageconsumer = (ActiveMQMessageConsumer) session.createConsumer(destination);
      startProducers(destination, 10);

      messageconsumer.receive(4000).acknowledge();
      assertNotNull(messageconsumer.receive(4000));
      assertNotNull(messageconsumer.receive(4000));
      assertNotNull(messageconsumer.receive(4000));

      // close control command won't get through
      socketProxy.pause();

      ActiveMQDestination amqDest = (ActiveMQDestination) destination;
      ObjectName destinationViewMBean = new ObjectName("org.apache.activemq:destinationType=" +
                                                          (amqDest.isTopic() ? "Topic" : "Queue") + ",destinationName=" + amqDest.getPhysicalName() + ",type=Broker,brokerName=localhost");

      final DestinationViewMBean destView = (DestinationViewMBean) broker.getManagementContext().newProxyInstance(destinationViewMBean, DestinationViewMBean.class, true);

      assertTrue("Consumer gone from broker view", Wait.waitFor(new Wait.Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            LOG.info("DestView {} comsumerCount {}", destView, destView.getConsumerCount());
            return 0 == destView.getConsumerCount();
         }
      }));

      socketProxy.goOn();

      assertTrue("consumer was closed", Wait.waitFor(new Wait.Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            boolean closed = false;
            try {
               messageconsumer.receive(400);
            } catch (javax.jms.IllegalStateException expected) {
               closed = expected.toString().contains("closed");
            }
            return closed;
         }
      }));
   }

   @Override
   public void onException(JMSException exception) {
      exceptions.add(exception);
      exception.printStackTrace();
   }
}
