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    1   /***
    2    *
    3    * Copyright 2004 Hiram Chirino
    4    *
    5    * Licensed under the Apache License, Version 2.0 (the "License");
    6    * you may not use this file except in compliance with the License.
    7    * You may obtain a copy of the License at
    8    *
    9    * http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   *
    17   **/
    18  package org.activeio.net;
    19
    20  import java.io.IOException;
    21  import java.net.InetAddress;
    22  import java.net.InetSocketAddress;
    23  import java.net.URI;
    24  import java.net.URISyntaxException;
    25
    26  import org.activeio.AsynchChannel;
    27  import org.activeio.AsynchChannelFactory;
    28  import org.activeio.AsynchChannelServer;
    29  import org.activeio.adapter.SynchToAsynchChannelServerAdapter;
    30  import org.activeio.filter.WriteBufferedAsynchChannel;
    31  import org.activeio.packet.ByteBufferPacket;
    32
    33  import com.ibm.io.async.AsyncServerSocketChannel;
    34  import com.ibm.io.async.AsyncSocketChannel;
    35
    36  /***
    37   * A TcpAsynchChannelFactory creates {@see org.activeio.net.TcpAsynchChannel}
    38   * and {@see org.activeio.net.TcpAsynchChannelServer} objects.
    39   *
    40   * @version $Revision$
    41   */
    42  public class AIOAsynchChannelFactory implements AsynchChannelFactory {
    43
    44      protected static final int DEFAULT_BACKLOG = 500;
    45      private int backlog = DEFAULT_BACKLOG;
    46
    47      /***
    48       * Uses the {@param location}'s host and port to create a tcp connection to a remote host.
    49       *
    50       * @see org.activeio.AsynchChannelFactory#openAsynchChannel(java.net.URI)
    51       */
    52      public AsynchChannel openAsynchChannel(URI location) throws IOException {
    53          AsyncSocketChannel channel = AsyncSocketChannel.open();
    54          channel.connect(new InetSocketAddress(location.getHost(), location.getPort()));
    55          return createAsynchChannel(channel);
    56      }
    57
    58      /***
    59       * @param channel
    60       * @return
    61       * @throws IOException
    62       */
    63      protected AsynchChannel createAsynchChannel(AsyncSocketChannel socketChannel) throws IOException {
    64          AsynchChannel channel = new AIOAsynchChannel(socketChannel);
    65          channel = new WriteBufferedAsynchChannel(channel, ByteBufferPacket.createDefaultBuffer(true), false);
    66          return channel;
    67      }
    68
    69      /***
    70       * Binds a server socket a the {@param location}'s port.
    71       *
    72       * @see org.activeio.AsynchChannelFactory#bindAsynchChannel(java.net.URI)
    73       */
    74      public AsynchChannelServer bindAsynchChannel(URI bindURI) throws IOException {
    75
    76          String host = bindURI.getHost();
    77          InetSocketAddress address;
    78          if ( host == null || host.length() == 0 || host.equals("localhost") || host.equals("0.0.0.0") ) {
    79              address = new InetSocketAddress(bindURI.getPort());
    80          } else {
    81              address = new InetSocketAddress(bindURI.getHost(), bindURI.getPort());
    82          }
    83
    84          AsyncServerSocketChannel serverSocketChannel = AsyncServerSocketChannel.open();
    85          serverSocketChannel.socket().bind(address,backlog);
    86
    87          URI connectURI = bindURI;
    88          try {
    89              connectURI = URISupport.changeHost(connectURI, InetAddress.getLocalHost().getHostName());
    90              connectURI = URISupport.changePort(connectURI, serverSocketChannel.socket().getLocalPort());
    91          } catch (URISyntaxException e) {
    92              throw (IOException)new IOException("Could not build connect URI: "+e).initCause(e);
    93          }
    94
    95          return SynchToAsynchChannelServerAdapter.adapt(
    96                  new AIOSynchChannelServer(serverSocketChannel, bindURI, connectURI));
    97      }
    98
    99      /***
    100      * @return Returns the backlog.
    101      */
    102     public int getBacklog() {
    103         return backlog;
    104     }
    105
    106     /***
    107      * @param backlog
    108      *            The backlog to set.
    109      */
    110     public void setBacklog(int backlog) {
    111         this.backlog = backlog;
    112     }
    113
    114
    115 }