| /* |
| * 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.netbeans.modules.netserver; |
| |
| import java.io.IOException; |
| import java.net.SocketAddress; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.ClosedChannelException; |
| import java.nio.channels.SelectionKey; |
| import java.nio.channels.Selector; |
| import java.nio.channels.SocketChannel; |
| import java.util.Iterator; |
| import java.util.Queue; |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| |
| /** |
| * @author ads |
| * |
| */ |
| public abstract class SocketFramework implements Runnable { |
| |
| protected static final Logger LOG = Logger.getLogger( |
| SocketServer.class.getCanonicalName()); |
| |
| public SocketFramework() throws IOException { |
| keys = new ConcurrentLinkedQueue<SelectionKey>(); |
| selector = Selector.open(); |
| } |
| |
| /* (non-Javadoc) |
| * @see java.lang.Runnable#run() |
| */ |
| @Override |
| public void run() { |
| try { |
| doRun(); |
| } |
| catch (IOException e) { |
| LOG.log(Level.WARNING, null, e); |
| } |
| } |
| |
| public void close( SelectionKey key ) throws IOException { |
| chanelClosed( key ); |
| key.channel().close(); |
| key.cancel(); |
| } |
| |
| public void stop(){ |
| stop = true; |
| getSelector().wakeup(); |
| } |
| |
| public void send( byte[] data , SelectionKey key ){ |
| getWriteQueue(key).add(ByteBuffer.wrap(data)); |
| keys.add(key); |
| getSelector().wakeup(); |
| } |
| |
| public boolean isStopped(){ |
| return stop; |
| } |
| |
| protected void doRun() throws IOException { |
| while (!stop) { |
| while (true) { |
| SelectionKey key = keys.poll(); |
| if (key == null) { |
| break; |
| } |
| else { |
| if (key.isValid()) { |
| int currentOps = key.interestOps(); |
| key.interestOps(currentOps|SelectionKey.OP_WRITE); |
| } |
| } |
| } |
| getSelector().select(); |
| if ( isStopped() ){ |
| return; |
| } |
| |
| for (Iterator<SelectionKey> iterator = getSelector().selectedKeys() |
| .iterator(); iterator.hasNext();) |
| { |
| SelectionKey key = iterator.next(); |
| iterator.remove(); |
| |
| if (!key.isValid()) { |
| continue; |
| } |
| |
| try { |
| process(key); |
| } |
| catch( ClosedChannelException e ){ |
| close(key); |
| } |
| catch( IOException e ){ |
| LOG.log(Level.INFO, null, e); |
| close(key); |
| } |
| } |
| } |
| getSelector().close(); |
| } |
| |
| protected void process( SelectionKey key ) throws IOException { |
| if (key.isReadable()) { |
| readData(key); |
| } |
| if (key.isValid() && key.isWritable()) { |
| writeData(key); |
| } |
| } |
| |
| protected abstract void chanelClosed( SelectionKey key ); |
| |
| protected abstract SocketAddress getAddress(); |
| |
| protected abstract Queue<ByteBuffer> getWriteQueue( SelectionKey key ); |
| |
| protected void setReadHandler( ReadHandler handler ){ |
| this.handler = handler; |
| } |
| |
| protected ReadHandler getReadHandler(){ |
| return handler; |
| } |
| |
| protected Selector getSelector(){ |
| return selector; |
| } |
| |
| protected void readData( SelectionKey key ) throws IOException { |
| handler.read(key); |
| } |
| |
| protected void writeData( SelectionKey key ) throws IOException { |
| Queue<ByteBuffer> queue = getWriteQueue(key); |
| int ops = SelectionKey.OP_READ; |
| while( queue!= null ){ |
| ByteBuffer buffer = queue.peek(); |
| if ( buffer == null ){ |
| break; |
| } |
| else { |
| int length = buffer.remaining(); |
| int written = ((SocketChannel)key.channel()).write(buffer); |
| if (written < length) { |
| // Not all bytes written. Socket's output buffer is full probably. |
| // Keep the rest of this buffer in the write queue and wait until |
| // the channel is writable again. |
| ops |= SelectionKey.OP_WRITE; |
| break; |
| } else { |
| // The whole content of the buffer written => remove it from the queue |
| queue.poll(); |
| } |
| } |
| } |
| key.interestOps(ops); |
| } |
| |
| private Selector selector; |
| private Queue<SelectionKey> keys; |
| private ReadHandler handler; |
| private volatile boolean stop; |
| |
| } |