1 /*
   2  * Copyright (c) 2008, 2009, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.nio.ch;
  27 
  28 import java.nio.channels.*;
  29 import java.nio.channels.spi.AsynchronousChannelProvider;
  30 import java.util.concurrent.ExecutorService;
  31 import java.util.concurrent.ThreadFactory;
  32 import java.net.ProtocolFamily;
  33 import java.io.IOException;
  34 
  35 public class SolarisAsynchronousChannelProvider
  36     extends AsynchronousChannelProvider
  37 {
  38     private static volatile SolarisEventPort defaultEventPort;
  39 
  40     private SolarisEventPort defaultEventPort() throws IOException {
  41         if (defaultEventPort == null) {
  42             synchronized (SolarisAsynchronousChannelProvider.class) {
  43                 if (defaultEventPort == null) {
  44                     defaultEventPort =
  45                         new SolarisEventPort(this, ThreadPool.getDefault()).start();
  46                 }
  47             }
  48         }
  49         return defaultEventPort;
  50     }
  51 
  52     public SolarisAsynchronousChannelProvider() {
  53     }
  54 
  55     @Override
  56     public AsynchronousChannelGroup openAsynchronousChannelGroup(int nThreads, ThreadFactory factory)
  57         throws IOException
  58     {
  59         return new SolarisEventPort(this, ThreadPool.create(nThreads, factory)).start();
  60     }
  61 
  62     @Override
  63     public AsynchronousChannelGroup openAsynchronousChannelGroup(ExecutorService executor, int initialSize)
  64         throws IOException
  65     {
  66         return new SolarisEventPort(this, ThreadPool.wrap(executor, initialSize)).start();
  67     }
  68 
  69     private SolarisEventPort toEventPort(AsynchronousChannelGroup group)
  70         throws IOException
  71     {
  72         if (group == null) {
  73             return defaultEventPort();
  74         } else {
  75             if (!(group instanceof SolarisEventPort))
  76                 throw new IllegalChannelGroupException();
  77             return (SolarisEventPort)group;
  78         }
  79     }
  80 
  81     @Override
  82     public AsynchronousServerSocketChannel openAsynchronousServerSocketChannel(AsynchronousChannelGroup group)
  83         throws IOException
  84     {
  85         return new UnixAsynchronousServerSocketChannelImpl(toEventPort(group));
  86     }
  87 
  88     @Override
  89     public AsynchronousSocketChannel openAsynchronousSocketChannel(AsynchronousChannelGroup group)
  90         throws IOException
  91     {
  92         return new UnixAsynchronousSocketChannelImpl(toEventPort(group));
  93     }
  94 
  95     @Override
  96     public AsynchronousDatagramChannel openAsynchronousDatagramChannel(ProtocolFamily family,
  97                                                                        AsynchronousChannelGroup group)
  98         throws IOException
  99     {
 100         return new SimpleAsynchronousDatagramChannelImpl(family, toEventPort(group));
 101     }
 102 }