01: /*
02: * (c) Copyright 2007 by Volker Bergmann. All rights reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, is permitted under the terms of the
06: * GNU General Public License.
07: *
08: * For redistributing this software or a derivative work under a license other
09: * than the GPL-compatible Free Software License as defined by the Free
10: * Software Foundation or approved by OSI, you must first obtain a commercial
11: * license to this software product from Volker Bergmann.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
14: * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
15: * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
16: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
17: * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
18: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24: * POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: package org.databene.task;
28:
29: import java.util.concurrent.CountDownLatch;
30:
31: import org.databene.commons.Context;
32:
33: /**
34: * Thread implementation that executes a Task.<br/>
35: * <br/>
36: * Created: 16.07.2007 20:14:52
37: * @author Volker Bergmann
38: */
39: public class TaskRunnable implements Runnable {
40:
41: private Task target;
42: private Context context;
43: private CountDownLatch latch;
44:
45: /**
46: * Initializes a TaskThread. If the context is null,
47: * the target task's init() and destroy() methods will not be called.
48: * @param target
49: * @param context
50: */
51: public TaskRunnable(Task target, Context context) {
52: this (target, context, null);
53: }
54:
55: public TaskRunnable(Task target, Context context,
56: CountDownLatch latch) {
57: this .target = target;
58: this .context = context;
59: this .latch = latch;
60: }
61:
62: public void run() {
63: try {
64: if (context != null)
65: target.init(context);
66: target.run();
67: if (context != null)
68: target.destroy();
69: } finally {
70: if (latch != null)
71: latch.countDown();
72: }
73: }
74: }
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