/*
    *  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.mina.filter.keepalive;
  
  import static org.apache.mina.filter.keepalive.KeepAliveRequestTimeoutHandler.EXCEPTION;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNotNull;
  
  import java.net.InetAddress;
  import java.net.InetSocketAddress;
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import org.apache.mina.core.buffer.IoBuffer;
  import org.apache.mina.core.future.ConnectFuture;
  import org.apache.mina.core.service.IoHandlerAdapter;
  import org.apache.mina.core.session.IdleStatus;
  import org.apache.mina.core.session.IoSession;
  import org.apache.mina.transport.socket.nio.NioSocketAcceptor;
  import org.apache.mina.transport.socket.nio.NioSocketConnector;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  /**
   * Tests {@link KeepAliveFilter} used by the connector with different
   * interested {@link IdleStatus}es.
   *
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  public class KeepAliveFilterTest {
      // Constants -----------------------------------------------------
      static final IoBuffer PING = IoBuffer.wrap(new byte[] { 1 });
  
      static final IoBuffer PONG = IoBuffer.wrap(new byte[] { 2 });
  
      private static final int INTERVAL = 2;
  
      private static final int TIMEOUT = 1;
  
      private int port;
  
      private NioSocketAcceptor acceptor;
  
      @Before
      public void setUp() throws Exception {
          acceptor = new NioSocketAcceptor();
          KeepAliveMessageFactory factory = new ServerFactory();
          KeepAliveFilter filter = new KeepAliveFilter(factory, IdleStatus.BOTH_IDLE);
          acceptor.getFilterChain().addLast("keep-alive", filter);
          acceptor.setHandler(new IoHandlerAdapter());
          acceptor.setDefaultLocalAddress(new InetSocketAddress(0));
          acceptor.bind();
          port = acceptor.getLocalAddress().getPort();
      }
  
      @After
      public void tearDown() throws Exception {
          acceptor.unbind();
          acceptor.dispose();
      }
  
      @Test
      public void testKeepAliveFilterForReaderIdle() throws Exception {
          keepAliveFilterForIdleStatus(IdleStatus.READER_IDLE);
      }
  
      @Test
      public void testKeepAliveFilterForBothIdle() throws Exception {
          keepAliveFilterForIdleStatus(IdleStatus.BOTH_IDLE);
      }
  
      @Test
      public void testKeepAliveFilterForWriterIdle() throws Exception {
          keepAliveFilterForIdleStatus(IdleStatus.WRITER_IDLE);
      }
  
      // Package protected ---------------------------------------------
  
      // Protected -----------------------------------------------------
  
      // Private -------------------------------------------------------
  
     private void keepAliveFilterForIdleStatus(IdleStatus status) throws Exception {
         NioSocketConnector connector = new NioSocketConnector();
         KeepAliveFilter filter = new KeepAliveFilter(new ClientFactory(), status, EXCEPTION, INTERVAL, TIMEOUT);
         filter.setForwardEvent(true);
         connector.getFilterChain().addLast("keep-alive", filter);
 
         final AtomicBoolean gotException = new AtomicBoolean(false);
         connector.setHandler(new IoHandlerAdapter() {
             @Override
             public void exceptionCaught(IoSession session, Throwable cause) throws Exception {
                 //cause.printStackTrace();
                 gotException.set(true);
             }
 
             @Override
             public void sessionIdle(IoSession session, IdleStatus status) throws Exception {
                 // Do nothing
             }
         });
 
         ConnectFuture future = connector.connect(new InetSocketAddress(InetAddress.getByName(null), port)).awaitUninterruptibly();
         IoSession session = future.getSession();
         assertNotNull(session);
 
         Thread.sleep((INTERVAL + TIMEOUT + 1) * 1000);
 
         assertFalse("got an exception on the client", gotException.get());
 
         session.closeNow();
         connector.dispose();
     }
 
     static boolean checkRequest(IoBuffer message) {
         IoBuffer buff = message;
         boolean check = buff.get() == 1;
         buff.rewind();
         return check;
     }
 
     static boolean checkResponse(IoBuffer message) {
         IoBuffer buff = message;
         boolean check = buff.get() == 2;
         buff.rewind();
         return check;
     }
 
     // Inner classes -------------------------------------------------
     private final class ServerFactory implements KeepAliveMessageFactory {
         /**
          * Default constructor
          */
         public ServerFactory() {
             super();
         }
 
         public Object getRequest(IoSession session) {
             return null;
         }
 
         public Object getResponse(IoSession session, Object request) {
             return PONG.duplicate();
         }
 
         public boolean isRequest(IoSession session, Object message) {
             if (message instanceof IoBuffer) {
                 return checkRequest((IoBuffer) message);
             }
             return false;
         }
 
         public boolean isResponse(IoSession session, Object message) {
             if (message instanceof IoBuffer) {
                 return checkResponse((IoBuffer) message);
             }
             return false;
         }
     }
 
     private final class ClientFactory implements KeepAliveMessageFactory {
         /**
          * Default constructor
          */
         public ClientFactory() {
             super();
         }
 
         public Object getRequest(IoSession session) {
             return PING.duplicate();
         }
 
         public Object getResponse(IoSession session, Object request) {
             return null;
         }
 
         public boolean isRequest(IoSession session, Object message) {
             if (message instanceof IoBuffer) {
                 return checkRequest((IoBuffer) message);
             }
             return false;
         }
 
         public boolean isResponse(IoSession session, Object message) {
             if (message instanceof IoBuffer) {
                 return checkResponse((IoBuffer) message);
             }
             return false;
         }
     }
 }