1 package org.apache.turbine.services.schedule;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache Turbine" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache Turbine", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57 import org.apache.turbine.TurbineConstants;
58 import org.apache.turbine.modules.ScheduledJobLoader;
59 import org.apache.turbine.services.logging.Logger;
60 import org.apache.turbine.services.logging.TurbineLogging;
61
62 /***
63 * Wrapper for a <code>JobEntry</code> to actually perform the job's action.
64 *
65 * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
66 * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
67 * @version $Id: WorkerThread.java,v 1.1.1.1 2001/08/16 05:09:15 jvanzyl Exp $
68 */
69 public class WorkerThread
70 implements Runnable
71 {
72 /***
73 * The <code>JobEntry</code> to run.
74 */
75 private JobEntry je = null;
76
77 /***
78 * The {@link org.apache.turbine.services.logging.Logger} facility to use.
79 */
80 private Logger logger = null;
81
82 /***
83 * Creates a new worker to run the specified <code>JobEntry</code>.
84 *
85 * @param je The <code>JobEntry</code> to create a worker for.
86 */
87 public WorkerThread(JobEntry je)
88 {
89 this.je = je;
90 logger = TurbineLogging.getLogger
91 (TurbineConstants.SCHEDULER_LOG_FACILITY);
92 }
93
94 /***
95 * Run the job.
96 */
97 public void run()
98 {
99 if (je == null || je.isActive())
100 return;
101
102 try
103 {
104 if (! je.isActive())
105 {
106 je.setActive(true);
107 logStateChange("started");
108 ScheduledJobLoader.getInstance().exec(je, je.getTask());
109 }
110 }
111 catch (Exception e)
112 {
113 logger.error("Error in WorkerThread for sheduled job #" +
114 je.getPrimaryKey() + ", task: " + je.getTask(), e);
115 }
116 finally
117 {
118 if (je.isActive())
119 {
120 je.setActive(false);
121 logStateChange("completed");
122 }
123 }
124 }
125
126 /***
127 * Macro to log <code>JobEntry</code> status information.
128 *
129 * @param state The new state of the <code>JobEntry</code>.
130 */
131 private final void logStateChange(String state)
132 {
133 logger.debug("Scheduled job #" + je.getPrimaryKey() + ' ' + state +
134 ", task: " + je.getTask());
135 }
136 }
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