NIOSynchChannelFactory xref

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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  import java.nio.channels.ServerSocketChannel;
    26  import java.nio.channels.SocketChannel;
    27
    28  import org.activeio.SynchChannel;
    29  import org.activeio.SynchChannelFactory;
    30  import org.activeio.SynchChannelServer;
    31  import org.activeio.filter.WriteBufferedSynchChannel;
    32  import org.activeio.packet.ByteBufferPacket;
    33
    34  /***
    35   * A TcpSynchChannelFactory creates {@see org.activeio.net.TcpSynchChannel}
    36   * and {@see org.activeio.net.TcpSynchChannelServer} objects.
    37   *
    38   * @version $Revision$
    39   */
    40  public class NIOSynchChannelFactory implements SynchChannelFactory {
    41
    42      protected static final int DEFAULT_BUFFER_SIZE = Integer.parseInt(System.getProperty("org.activeio.net.nio.BufferSize", ""+(64*1024)));
    43
    44      protected static final int DEFAULT_BACKLOG = 500;
    45      boolean useDirectBuffers = true;
    46      private final boolean createWriteBufferedChannels;
    47      private int backlog = DEFAULT_BACKLOG;
    48
    49      public NIOSynchChannelFactory() {
    50          this(true);
    51      }
    52
    53      public NIOSynchChannelFactory(boolean createWriteBufferedChannels) {
    54          this.createWriteBufferedChannels = createWriteBufferedChannels;
    55      }
    56
    57
    58      /***
    59       * Uses the {@param location}'s host and port to create a tcp connection to a remote host.
    60       *
    61       * @see org.activeio.SynchChannelFactory#openSynchChannel(java.net.URI)
    62       */
    63      public SynchChannel openSynchChannel(URI location) throws IOException {
    64          SocketChannel channel = SocketChannel.open();
    65          channel.connect(new InetSocketAddress(location.getHost(), location.getPort()));
    66          return createSynchChannel(channel);
    67      }
    68
    69      /***
    70       * @param channel
    71       * @return
    72       * @throws IOException
    73       */
    74      protected SynchChannel createSynchChannel(SocketChannel socketChannel) throws IOException {
    75          SynchChannel channel = new NIOSynchChannel(socketChannel);
    76          if( createWriteBufferedChannels ) {
    77              channel = new WriteBufferedSynchChannel(channel, ByteBufferPacket.createDefaultBuffer(useDirectBuffers));
    78          }
    79          return channel;
    80      }
    81
    82      /***
    83       * Binds a server socket a the {@param location}'s port.
    84       *
    85       * @see org.activeio.SynchChannelFactory#bindSynchChannel(java.net.URI)
    86       */
    87      public SynchChannelServer bindSynchChannel(URI bindURI) throws IOException {
    88
    89          String host = bindURI.getHost();
    90          InetSocketAddress address;
    91          if ( host == null || host.length() == 0 || host.equals("localhost") || host.equals("0.0.0.0") ) {
    92              address = new InetSocketAddress(bindURI.getPort());
    93          } else {
    94              address = new InetSocketAddress(bindURI.getHost(), bindURI.getPort());
    95          }
    96
    97          ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
    98          serverSocketChannel.socket().bind(address,backlog);
    99
    100         URI connectURI = bindURI;
    101         try {
    102             connectURI = URISupport.changeHost(connectURI, InetAddress.getLocalHost().getHostName());
    103             connectURI = URISupport.changePort(connectURI, serverSocketChannel.socket().getLocalPort());
    104         } catch (URISyntaxException e) {
    105             throw (IOException)new IOException("Could not build connect URI: "+e).initCause(e);
    106         }
    107
    108         return new NIOSynchChannelServer(serverSocketChannel, bindURI, connectURI, createWriteBufferedChannels, useDirectBuffers);
    109     }
    110
    111     /***
    112      * @return Returns the backlog.
    113      */
    114     public int getBacklog() {
    115         return backlog;
    116     }
    117
    118     /***
    119      * @param backlog
    120      *            The backlog to set.
    121      */
    122     public void setBacklog(int backlog) {
    123         this.backlog = backlog;
    124     }
    125
    126
    127 }