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comparison dwtx/core/internal/jobs/Worker.d @ 122:9d0585bcb7aa

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Add core.jobs package
author Frank Benoit <benoit@tionex.de>
date Tue, 12 Aug 2008 02:34:21 +0200
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children 862b05e0334a
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121:c0304616ea23 122:9d0585bcb7aa
1 /*******************************************************************************
2 * Copyright (c) 2003, 2006 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module dwtx.core.internal.jobs.Worker;
14
15 import tango.core.Thread;
16 import tango.text.convert.Format;
17 import dwt.dwthelper.utils;
18
19 import dwtx.core.internal.runtime.RuntimeLog;
20 import dwtx.core.runtime.IStatus;
21 import dwtx.core.runtime.OperationCanceledException;
22 import dwtx.core.runtime.Status;
23 import dwtx.core.runtime.jobs.Job;
24 import dwtx.osgi.util.NLS;
25
26 import dwtx.core.internal.jobs.InternalJob;
27 import dwtx.core.internal.jobs.WorkerPool;
28 import dwtx.core.internal.jobs.JobMessages;
29 import dwtx.core.internal.jobs.JobManager;
30
31 /**
32 * A worker thread processes jobs supplied to it by the worker pool. When
33 * the worker pool gives it a null job, the worker dies.
34 */
35 public class Worker : Thread {
36 //worker number used for debugging purposes only
37 private static int nextWorkerNumber = 0;
38 private /+volatile+/ InternalJob currentJob_;
39 private final WorkerPool pool;
40
41 public this(WorkerPool pool) {
42 super(&run);
43 this.name = Format("Worker-{}", nextWorkerNumber++); //$NON-NLS-1$
44 this.pool = pool;
45 //set the context loader to avoid leaking the current context loader
46 //for the thread that spawns this worker (bug 98376)
47 // DWT
48 // setContextClassLoader(pool.defaultContextLoader);
49 }
50
51 /**
52 * Returns the currently running job, or null if none.
53 */
54 public Job currentJob() {
55 return cast(Job) currentJob_;
56 }
57
58 private IStatus handleException(InternalJob job, Exception t) {
59 String message = NLS.bind(JobMessages.jobs_internalError, job.getName_package());
60 return new Status(IStatus.ERROR, JobManager.PI_JOBS, JobManager.PLUGIN_ERROR, message, t);
61 }
62
63 public void run() {
64 this.priority((PRIORITY_MAX-PRIORITY_MIN)/2); // DWT normal priority
65 try {
66 while ((currentJob_ = pool.startJob_package(this)) !is null) {
67 currentJob_.setThread_package(this);
68 IStatus result = Status.OK_STATUS;
69 try {
70 result = currentJob_.run_package(currentJob_.getProgressMonitor());
71 } catch (OperationCanceledException e) {
72 result = Status.CANCEL_STATUS;
73 } catch (Exception e) {
74 result = handleException(currentJob_, e);
75 // } catch (ThreadDeath e) {
76 // //must not consume thread death
77 // result = handleException(currentJob_, e);
78 // throw e;
79 // } catch (Error e) {
80 // result = handleException(currentJob_, e);
81 } finally {
82 //clear interrupted state for this thread
83 implMissing( __FILE__, __LINE__ );
84 // DWT
85 // Thread.interrupted();
86
87
88 //result must not be null
89 if (result is null)
90 result = handleException(currentJob_, new NullPointerException());
91 pool.endJob_package(currentJob_, result);
92 if ((result.getSeverity() & (IStatus.ERROR | IStatus.WARNING)) !is 0)
93 RuntimeLog.log(result);
94 currentJob_ = null;
95 }
96 }
97 } catch (Exception t) {
98 ExceptionPrintStackTrace(t);
99 } finally {
100 currentJob_ = null;
101 pool.endWorker_package(this);
102 }
103 }
104 }