1 /*

     2  * Copyright (c) 1997, 2008, 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 

    27 /*

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

    29  * Original Code is Bill Foote, with contributions from others

    30  * at JavaSoft/Sun.

    31  */

    32 

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

    34 

    35 /**

    36  *

    37  * @author      Bill Foote

    38  */

    39 

    40 

    41 import java.net.Socket;

    42 import java.net.ServerSocket;

    43 import java.net.InetAddress;

    44 

    45 import java.io.InputStream;

    46 import java.io.BufferedInputStream;

    47 import java.io.IOException;

    48 import java.io.Writer;

    49 import java.io.BufferedWriter;

    50 import java.io.PrintWriter;

    51 import java.io.OutputStream;

    52 import java.io.OutputStreamWriter;

    53 import java.io.BufferedOutputStream;

    54 

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

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

    57 

    58 public class QueryListener implements Runnable {

    59 

    60 

    61     private Snapshot snapshot;

    62     private OQLEngine engine;

    63     private int port;

    64 

    65     public QueryListener(int port) {

    66         this.port = port;

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

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

    69     }

    70 

    71     public void setModel(Snapshot ss) {

    72         this.snapshot = ss;

    73         if (OQLEngine.isOQLSupported()) {

    74             this.engine = new OQLEngine(ss);

    75         }

    76     }

    77 

    78     public void run() {

    79         try {

    80             waitForRequests();

    81         } catch (IOException ex) {

    82             ex.printStackTrace();

    83             System.exit(1);

    84         }

    85     }

    86 

    87     private void waitForRequests() throws IOException {

    88         ServerSocket ss = new ServerSocket(port);

    89         Thread last = null;

    90         for (;;) {

    91             Socket s = ss.accept();

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

    93             if (snapshot == null) {

    94                 t.setPriority(Thread.NORM_PRIORITY+1);

    95             } else {

    96                 t.setPriority(Thread.NORM_PRIORITY-1);

    97                 if (last != null) {

    98                     try {

    99                         last.setPriority(Thread.NORM_PRIORITY-2);

   100                     } catch (Throwable ignored) {

   101                     }

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

   103                     // NullPointerException

   104                 }

   105             }

   106             t.start();

   107             last = t;

   108         }

   109     }

   110 

   111 }