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PHPJavaBridge server (soluble fork)
There is a newer version: 7.1.3
/*
 * Copyright (C) 2003-2007 Jost Boekemeier
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

package io.soluble.pjb.bridge;

import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

// Note: Make sure that classes like Util or JavaBridge are only accessed if something fails
// The default path should only load the Standalone and the Socket classes
class TCPServerSocket implements ISocketFactory {

    static int TCP_PORT_BASE = 9267; //try to find a free port in the range 9267, ..., 9366
    private ServerSocket sock;
    private int port;
    boolean local;

    public static ISocketFactory create(String name, int backlog) throws IOException {
        int p;
        boolean local = false;

        if (name == null) throw new NullPointerException("name");
        if (name.startsWith("INET:")) name = name.substring(5);
        else if (name.startsWith("INET_LOCAL:")) {
            local = true;
            name = name.substring(11);
        }

        p = Integer.parseInt(name);
        TCPServerSocket s = new TCPServerSocket(p, backlog, local);
        return s;
    }

    private ServerSocket newServerSocket(int port, int backlog) throws java.io.IOException {
        try {
            if (local)
                return new ServerSocket(port, backlog, InetAddress.getByName("127.0.0.1"));
        } catch (java.net.UnknownHostException e) {/*cannot happen*/}
        return new ServerSocket(port, backlog);
    }

    private void findFreePort(int start, int backlog) {
        for (int port = start; port < start + 100; port++) {
            try {
                this.sock = newServerSocket(port, backlog);
                this.port = port;
                return;
            } catch (IOException e) {
            }

        }
    }

    private TCPServerSocket(int port, int backlog, boolean local) throws IOException {
        this.local = local;
        if (port == 0) {
            findFreePort(TCP_PORT_BASE, backlog);
        } else {
            this.sock = newServerSocket(port, backlog);
            this.port = port;
        }
    }

    @Override
    public void close() throws IOException {
        sock.close();
    }

    @Override
    public Socket accept() throws IOException {
        Socket s = sock.accept();
        s.setTcpNoDelay(true);
        return s;
    }

    @Override
    public String getSocketName() {
        return String.valueOf(port);
    }

    @Override
    public String toString() {
        return (local ? "INET_LOCAL:" : "INET:") + getSocketName();
    }
}