jdk/src/sample/share/nio/server/AcceptHandler.java

/*
 * Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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/*
 * This source code is provided to illustrate the usage of a given feature
 * or technique and has been deliberately simplified. Additional steps
 * required for a production-quality application, such as security checks,
 * input validation and proper error handling, might not be present in
 * this sample code.
 */


import java.io.*;
import java.nio.channels.*;
import javax.net.ssl.*;

/**
 * A single threaded Handler that performs accepts SocketChannels and
 * registers the Channels with the read/write Selector.
 *
 * @author Mark Reinhold
 * @author Brad R. Wetmore
 */
class AcceptHandler implements Handler {

    private ServerSocketChannel channel;
    private Dispatcher dsp;

    private SSLContext sslContext;

    AcceptHandler(ServerSocketChannel ssc, Dispatcher dsp,
            SSLContext sslContext) {
        channel = ssc;
        this.dsp = dsp;
        this.sslContext = sslContext;
    }

    public void handle(SelectionKey sk) throws IOException {

        if (!sk.isAcceptable())
            return;

        SocketChannel sc = channel.accept();
        if (sc == null) {
            return;
        }

        ChannelIO cio = (sslContext != null ?
            ChannelIOSecure.getInstance(
                sc, false /* non-blocking */, sslContext) :
            ChannelIO.getInstance(
                sc, false /* non-blocking */));

        RequestHandler rh = new RequestHandler(cio);
        dsp.register(cio.getSocketChannel(), SelectionKey.OP_READ, rh);
    }
}