KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > net > sourceforge > cruisecontrol > ServerXMLHelper


1 /********************************************************************************
2  * CruiseControl, a Continuous Integration Toolkit
3  * Copyright (c) 2001, ThoughtWorks, Inc.
4  * 651 W Washington Ave. Suite 600
5  * Chicago, IL 60661 USA
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * + Redistributions of source code must retain the above copyright
13  * notice, this list of conditions and the following disclaimer.
14  *
15  * + Redistributions in binary form must reproduce the above
16  * copyright notice, this list of conditions and the following
17  * disclaimer in the documentation and/or other materials provided
18  * with the distribution.
19  *
20  * + Neither the name of ThoughtWorks, Inc., CruiseControl, nor the
21  * names of its contributors may be used to endorse or promote
22  * products derived from this software without specific prior
23  * written permission.
24  *
25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
29  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36  ********************************************************************************/
37 package net.sourceforge.cruisecontrol;
38
39 import net.sourceforge.cruisecontrol.util.Util;
40 import org.apache.log4j.Logger;
41 import org.jdom.Attribute;
42 import org.jdom.DataConversionException;
43 import org.jdom.Element;
44
45 import java.io.File JavaDoc;
46
47 /**
48  * @author Jared Richardson jared.richardson@sas.com
49  * <p/>
50  * this routine encapsulates the config file for the application.
51  * it fetches a value from the config file and handles errors.
52  */
53
54 public class ServerXMLHelper {
55     private static final Logger LOG = Logger.getLogger(ServerXMLHelper.class);
56
57     private int numThreads = 1;
58
59     public ServerXMLHelper(File JavaDoc configFile) {
60         try {
61             Element configLogElement = Util.loadConfigFile(configFile);
62             Element systemElement = configLogElement.getChild("system");
63             if (systemElement == null) {
64                 LOG.debug("no system element found in config.xml");
65                 return;
66             }
67             Element configurationElement = systemElement.getChild("configuration");
68             if (configurationElement == null) {
69                 LOG.debug("no configuraiton element found in config.xml");
70                 return;
71             }
72             Element threadElement = configurationElement.getChild("threads");
73             if (threadElement == null) {
74                 LOG.debug("no threads element found in config.xml");
75                 return;
76             }
77             Attribute threadCount = threadElement.getAttribute("count");
78             LOG.debug("count attribute on threads is " + threadCount.toString());
79             try {
80                 numThreads = threadCount.getIntValue();
81             } catch (DataConversionException dce) {
82                 LOG.error("Expected a numeric value for system-configuration-threads-count in config.xml but found "
83                         + threadCount.toString(), dce);
84                 numThreads = 1;
85             }
86         } catch (Exception JavaDoc e) {
87             LOG.warn("error parsing thread count from config file; defaulting to 1 thread.", e);
88             numThreads = 1;
89         }
90     }
91
92     /**
93      * @return int the number of threads that CruiseControl should allow to run at the same time
94      * to process pending build requests
95      */
96     public int getNumThreads() {
97         return numThreads;
98     }
99 }
100
Popular Tags