/*
 * 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.nio;

import javax.jms.BytesMessage;
import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;

import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.util.Wait;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@SuppressWarnings({"javadoc"})
public class NIOSSLConcurrencyTest extends TestCase {

   BrokerService broker;
   Connection connection;

   public static final String KEYSTORE_TYPE = "jks";
   public static final String PASSWORD = "password";
   public static final String SERVER_KEYSTORE = "src/test/resources/server.keystore";
   public static final String TRUST_KEYSTORE = "src/test/resources/client.keystore";

   public static final int PRODUCER_COUNT = 10;
   public static final int CONSUMER_COUNT = 10;
   public static final int MESSAGE_COUNT = 10000;
   public static final int MESSAGE_SIZE = 4096;

   final ConsumerThread[] consumers = new ConsumerThread[CONSUMER_COUNT];
   final Session[] producerSessions = new Session[PRODUCER_COUNT];
   final Session[] consumerSessions = new Session[CONSUMER_COUNT];

   byte[] messageData;
   volatile boolean failed;

   @Override
   protected void setUp() throws Exception {
      System.setProperty("javax.net.ssl.trustStore", TRUST_KEYSTORE);
      System.setProperty("javax.net.ssl.trustStorePassword", PASSWORD);
      System.setProperty("javax.net.ssl.trustStoreType", KEYSTORE_TYPE);
      System.setProperty("javax.net.ssl.keyStore", SERVER_KEYSTORE);
      System.setProperty("javax.net.ssl.keyStoreType", KEYSTORE_TYPE);
      System.setProperty("javax.net.ssl.keyStorePassword", PASSWORD);

      broker = new BrokerService();
      broker.setPersistent(false);
      broker.setUseJmx(false);
      TransportConnector connector = broker.addConnector("nio+ssl://localhost:0?transport.needClientAuth=true&transport.enabledCipherSuites=SSL_RSA_WITH_RC4_128_SHA,SSL_DH_anon_WITH_3DES_EDE_CBC_SHA");
      broker.start();
      broker.waitUntilStarted();

      failed = false;
      messageData = new byte[MESSAGE_SIZE];
      for (int i = 0; i < MESSAGE_SIZE; i++) {
         messageData[i] = (byte) (i & 0xff);
      }

      ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory("nio+ssl://localhost:" + connector.getConnectUri().getPort());
      connection = factory.createConnection();

      for (int i = 0; i < PRODUCER_COUNT; i++) {
         producerSessions[i] = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      }

      for (int i = 0; i < CONSUMER_COUNT; i++) {
         consumerSessions[i] = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      }

      connection.start();
   }

   @Override
   protected void tearDown() throws Exception {
      if (connection != null) {
         connection.close();
      }

      if (broker != null) {
         broker.stop();
         broker.waitUntilStopped();
      }
   }

   public void testLoad() throws Exception {
      for (int i = 0; i < PRODUCER_COUNT; i++) {
         Queue dest = producerSessions[i].createQueue("TEST" + i);
         ProducerThread producer = new ProducerThread(producerSessions[i], dest);
         producer.setMessageCount(MESSAGE_COUNT);
         producer.start();
      }

      for (int i = 0; i < CONSUMER_COUNT; i++) {
         Queue dest = consumerSessions[i].createQueue("TEST" + i);
         ConsumerThread consumer = new ConsumerThread(consumerSessions[i], dest);
         consumer.setMessageCount(MESSAGE_COUNT);
         consumer.start();
         consumers[i] = consumer;
      }

      Wait.waitFor(() -> failed || getReceived() == PRODUCER_COUNT * MESSAGE_COUNT, 120000);

      assertEquals(PRODUCER_COUNT * MESSAGE_COUNT, getReceived());

   }

   protected int getReceived() {
      int received = 0;
      for (ConsumerThread consumer : consumers) {
         received += consumer.getReceived();
      }
      return received;
   }

   private class ConsumerThread extends Thread {

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

      int messageCount = 1000;
      int received = 0;
      Destination dest;
      Session sess;
      boolean breakOnNull = true;

      public ConsumerThread(Session sess, Destination dest) {
         this.dest = dest;
         this.sess = sess;
      }

      @Override
      public void run() {
         MessageConsumer consumer = null;

         try {
            consumer = sess.createConsumer(dest);
            while (received < messageCount) {
               Message msg = consumer.receive(3000);
               if (msg != null) {
                  LOG.info("Received test message: " + received++);
               } else {
                  if (breakOnNull) {
                     break;
                  }
               }
            }
         } catch (JMSException e) {
            e.printStackTrace();
            failed = true;
         } finally {
            if (consumer != null) {
               try {
                  consumer.close();
               } catch (JMSException e) {
                  e.printStackTrace();
               }
            }
         }
      }

      public int getReceived() {
         return received;
      }

      public void setMessageCount(int messageCount) {
         this.messageCount = messageCount;
      }
   }

   private class ProducerThread extends Thread {

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

      int messageCount = 1000;
      Destination dest;
      protected Session sess;
      int sleep = 0;
      int sentCount = 0;

      public ProducerThread(Session sess, Destination dest) {
         this.dest = dest;
         this.sess = sess;
      }

      @Override
      public void run() {
         MessageProducer producer = null;
         try {
            producer = sess.createProducer(dest);
            for (sentCount = 0; sentCount < messageCount; sentCount++) {
               producer.send(createMessage(sentCount));
               LOG.info("Sent 'test message: " + sentCount + "'");
               if (sleep > 0) {
                  Thread.sleep(sleep);
               }
            }
         } catch (Exception e) {
            e.printStackTrace();
            failed = true;
         } finally {
            if (producer != null) {
               try {
                  producer.close();
               } catch (JMSException e) {
                  e.printStackTrace();
               }
            }
         }
      }

      protected Message createMessage(int i) throws Exception {
         BytesMessage b = sess.createBytesMessage();
         b.writeBytes(messageData);
         return b;
      }

      public void setMessageCount(int messageCount) {
         this.messageCount = messageCount;
      }

   }
}
