/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

/*

 * The Original Code is HAT. The Initial Developer of the

 * Original Code is Bill Foote, with contributions from others

 * at JavaSoft/Sun.

 */

package com.sun.tools.hat.internal.server;

/**

 *

 * @author      Bill Foote

 */

import java.net.Socket;

import java.net.ServerSocket;

import java.net.InetAddress;

import java.io.InputStream;

import java.io.BufferedInputStream;

import java.io.IOException;

import java.io.Writer;

import java.io.BufferedWriter;

import java.io.PrintWriter;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

import java.io.BufferedOutputStream;

import com.sun.tools.hat.internal.model.Snapshot;

import com.sun.tools.hat.internal.oql.OQLEngine;

public class QueryListener implements Runnable {

    private Snapshot snapshot;

    private OQLEngine engine;

    private int port;

    public QueryListener(int port) {

        this.port = port;

        this.snapshot = null;   // Client will setModel when it's ready

        this.engine = null; // created when snapshot is set

    }

    public void setModel(Snapshot ss) {

        this.snapshot = ss;

        if (OQLEngine.isOQLSupported()) {

            this.engine = new OQLEngine(ss);

        }

    }

    public void run() {

        try {

            waitForRequests();

        } catch (IOException ex) {

            ex.printStackTrace();

            System.exit(1);

        }

    }

    private void waitForRequests() throws IOException {

        ServerSocket ss = new ServerSocket(port);

        Thread last = null;

        for (;;) {

            Socket s = ss.accept();

            Thread t = new Thread(new HttpReader(s, snapshot, engine));

            if (snapshot == null) {

                t.setPriority(Thread.NORM_PRIORITY+1);

            } else {

                t.setPriority(Thread.NORM_PRIORITY-1);

                if (last != null) {

                    try {

                        last.setPriority(Thread.NORM_PRIORITY-2);

                    } catch (Throwable ignored) {

                    }

                    // If the thread is no longer alive, we'll get a

                    // NullPointerException

                }

            }

            t.start();

            last = t;

        }

    }

}