1 package org.apache.turbine.services.schedule;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import org.apache.commons.logging.Log;
23 import org.apache.commons.logging.LogFactory;
24 import org.apache.turbine.modules.ScheduledJobLoader;
25
26 /**
27 * Wrapper for a <code>JobEntry</code> to actually perform the job's action.
28 *
29 * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
30 * @author <a href="mailto:dlr@finemaltcoding.com">Daniel Rall</a>
31 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
32 * @author <a href="mailto:quintonm@bellsouth.net">Quinton McCombs</a>
33 * @version $Id: WorkerThread.java 534527 2007-05-02 16:10:59Z tv $
34 */
35 public class WorkerThread
36 implements Runnable
37 {
38 /**
39 * The <code>JobEntry</code> to run.
40 */
41 private JobEntry je = null;
42
43 /** Logging */
44 private static Log log = LogFactory.getLog(ScheduleService.LOGGER_NAME);
45
46 /**
47 * Creates a new worker to run the specified <code>JobEntry</code>.
48 *
49 * @param je The <code>JobEntry</code> to create a worker for.
50 */
51 public WorkerThread(JobEntry je)
52 {
53 this.je = je;
54 }
55
56 /**
57 * Run the job.
58 */
59 @Override
60 public void run()
61 {
62 if (je == null || je.isActive())
63 {
64 return;
65 }
66
67 try
68 {
69 if (!je.isActive())
70 {
71 je.setActive(true);
72 logStateChange("started");
73 ScheduledJobLoader.getInstance().exec(je, je.getTask());
74 }
75 }
76 catch (Exception e)
77 {
78 log.error("Error in WorkerThread for scheduled job #" +
79 je.getJobId() + ", task: " + je.getTask(), e);
80 }
81 finally
82 {
83 if (je.isActive())
84 {
85 je.setActive(false);
86 logStateChange("completed");
87 }
88 }
89 }
90
91 /**
92 * Macro to log <code>JobEntry</code> status information.
93 *
94 * @param state The new state of the <code>JobEntry</code>.
95 */
96 private final void logStateChange(String state)
97 {
98 log.debug("Scheduled job #" + je.getJobId() + ' ' + state +
99 ", task: " + je.getTask());
100 }
101 }