Source Code Cross Referenced for TaskExecuter.java in  » Database-Client » squirrel-sql-2.6.5a » net » sourceforge » squirrel_sql » fw » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database Client » squirrel sql 2.6.5a » net.sourceforge.squirrel_sql.fw.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        package net.sourceforge.squirrel_sql.fw.util;
02:
03:        /*
04:         * Copyright (C) 2001 Johan Companger
05:         * jcompagner@j-com.nl
06:         *
07:         * Modifications copyright (C) 2001 Colin Bell
08:         * colbell@users.sourceforge.net
09:         *
10:         * This library is free software; you can redistribute it and/or
11:         * modify it under the terms of the GNU Lesser General Public
12:         * License as published by the Free Software Foundation; either
13:         * version 2.1 of the License, or (at your option) any later version.
14:         *
15:         * This library is distributed in the hope that it will be useful,
16:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
17:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18:         * Lesser General Public License for more details.
19:         *
20:         * You should have received a copy of the GNU Lesser General Public
21:         * License along with this library; if not, write to the Free Software
22:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23:         */
24:
25:        /**
26:         * This is the code called by a thread in the thead pool that
27:         * handles the executing of tasks.
28:         *
29:         * @author <A HREF="mailto:colbell@users.sourceforge.net">Colin Bell</A>
30:         * @author <A HREF="mailto:jcompagner@j-com.nl">Johan Companger</A>
31:         */
32:        class TaskExecuter implements  Runnable {
33:            private boolean _bStopThread = false;
34:            //	private boolean _bStopExecution = false;
35:            private ITaskThreadPoolCallback _callback;
36:
37:            TaskExecuter(ITaskThreadPoolCallback callback)
38:                    throws IllegalArgumentException {
39:                super ();
40:                if (callback == null) {
41:                    throw new IllegalArgumentException(
42:                            "Null IGUIExecutionControllerCallback passed");
43:                }
44:                _callback = callback;
45:            }
46:
47:            public void run() {
48:                while (!_bStopThread) {
49:                    Runnable task = null;
50:                    synchronized (_callback) {
51:                        _callback.incrementFreeThreadCount();
52:                        while (!_bStopThread) {
53:                            //					_bStopExecution = false;
54:                            task = _callback.nextTask();
55:                            if (task != null) {
56:                                _callback.decrementFreeThreadCount();
57:                                break;
58:                            } else {
59:                                try {
60:                                    _callback.wait();
61:                                } catch (InterruptedException ignore) {
62:                                    // Ignore
63:                                }
64:                            }
65:                        }
66:                    }
67:                    if (task != null) {
68:                        try {
69:                            task.run();
70:                        } catch (Throwable th) {
71:                            _callback.showMessage(th);
72:                        }
73:                    }
74:                }
75:            }
76:        }
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