1 /*
   2  * Copyright (c) 2008, 2010, 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.io.IOException;
  33 
  34 public class SolarisAsynchronousChannelProvider
  35     extends AsynchronousChannelProvider
  36 {
  37     private static volatile SolarisEventPort defaultEventPort;
  38 
  39     private SolarisEventPort defaultEventPort() throws IOException {
  40         if (defaultEventPort == null) {
  41             synchronized (SolarisAsynchronousChannelProvider.class) {
  42                 if (defaultEventPort == null) {
  43                     defaultEventPort =
  44                         new SolarisEventPort(this, ThreadPool.getDefault()).start();
  45                 }
  46             }
  47         }
  48         return defaultEventPort;
  49     }
  50 
  51     public SolarisAsynchronousChannelProvider() {
  52     }
  53 
  54     @Override
  55     public AsynchronousChannelGroup openAsynchronousChannelGroup(int nThreads, ThreadFactory factory)
  56         throws IOException
  57     {
  58         return new SolarisEventPort(this, ThreadPool.create(nThreads, factory)).start();
  59     }
  60 
  61     @Override
  62     public AsynchronousChannelGroup openAsynchronousChannelGroup(ExecutorService executor, int initialSize)
  63         throws IOException
  64     {
  65         return new SolarisEventPort(this, ThreadPool.wrap(executor, initialSize)).start();
  66     }
  67 
  68     private SolarisEventPort toEventPort(AsynchronousChannelGroup group)
  69         throws IOException
  70     {
  71         if (group == null) {
  72             return defaultEventPort();
  73         } else {
  74             if (!(group instanceof SolarisEventPort))
  75                 throw new IllegalChannelGroupException();
  76             return (SolarisEventPort)group;
  77         }
  78     }
  79 
  80     @Override
  81     public AsynchronousServerSocketChannel openAsynchronousServerSocketChannel(AsynchronousChannelGroup group)
  82         throws IOException
  83     {
  84         return new UnixAsynchronousServerSocketChannelImpl(toEventPort(group));
  85     }
  86 
  87     @Override
  88     public AsynchronousSocketChannel openAsynchronousSocketChannel(AsynchronousChannelGroup group)
  89         throws IOException
  90     {
  91         return new UnixAsynchronousSocketChannelImpl(toEventPort(group));
  92     }
  93 }