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1 /* ====================================================================
2 * License:
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * 3. The end-user documentation included with the redistribution,
17 * if any, must include the following acknowledgment:
18 * "This product includes software developed by
19 * Robert Half International (http://www.rhi.com/)."
20 * Alternately, this acknowledgment may appear in the software itself,
21 * if and wherever such third-party acknowledgments normally appear.
22 *
23 * 4. The names "Parc", "RHI", and "Robert Half International" must
24 * not be used to endorse or promote products derived from this
25 * software without prior written permission. For written
26 * permission, please contact pete.mckinstry@rhi.com.
27 *
28 * 5. Products derived from this software may not be called "PARC",
29 * nor may "PARC" appear in their name, without prior written
30 * permission of Robert Half International.
31 *
32 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
33 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
34 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
35 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
36 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
37 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
38 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
39 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
40 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
41 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
42 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 * SUCH DAMAGE.
44 * ====================================================================
45 *
46 */
47 package com.rhi.architecture.batch;
48
49 import com.rhi.architecture.resource.InitializationException;
50 import com.rhi.architecture.logging.Logger;
51 import com.rhi.architecture.logging.LogUtil;
52 import com.rhi.architecture.config.ConfigurationException;
53
54 import java.util.Properties;
55
56 /***
57 * ConfigMixinUtils
58 * <br/>
59 * Abstracts away the loading of configuration data so that it can be shared
60 * by different classes. (PipelineProcess & PARCApplication currently.)
61 *
62 * @author petmck01
63 * @copyright 2002, Robert Half Int'l, All rights reserved.
64 *
65 * @version 1.0
66 */
67 public class ConfigMixinUtils {
68
69 /***
70 * logger
71 */
72 private static Logger log = null;
73
74 /***
75 * class initializer tries to create logger instance.
76 */
77 static {
78 try {
79 log = LogUtil.getLogger();
80 }
81 catch (ConfigurationException e) {
82 System.err.println("failure creating logger instance");
83 }
84 }
85
86 /***
87 * Instantiate a Configuration Mixin class & load it's property
88 * settings.
89 *
90 * @param mixinClassName
91 * @param props
92 * @throws InitializationException
93 * @since 1.0
94 */
95 private static void loadConfigMixin(String mixinClassName, Properties props)
96 throws InitializationException {
97 try {
98 log.debug("loading ConfigMixin = " + mixinClassName);
99 Class mixinClass = Class.forName(mixinClassName);
100 ConfigMixin config = (ConfigMixin) mixinClass.newInstance();
101 config.loadConfiguration(props);
102 }
103 catch (ClassNotFoundException cnfe) {
104 throw new InitializationException(
105 "ClassNotFoundException = " + cnfe.toString());
106 }
107 catch (InstantiationException ie) {
108 throw new InitializationException(
109 "InstantiationException = " + ie.toString());
110 }
111 catch (IllegalAccessException iae) {
112 throw new InitializationException(
113 "IllegalAccessException = " + iae.toString());
114 }
115 }
116
117 /***
118 * Mixin classes can be used to append configuration
119 * information from disparate sources w/o affecting the
120 * core batch architecture. This facility allows the
121 * interface developer to add any number of optional mixin
122 * classes. They will be loaded and initialized @ runtime
123 * prior to initializing any framework objects.
124 *
125 * @param props - the complete config set.
126 * @throws InitializationException
127 * @since 1.0
128 */
129 public static void loadAllMixins(Properties props)
130 throws InitializationException {
131
132 int count = 0;
133 while (true) {
134 // instead of using propertyNames() enumeration to find
135 // config mixins, i chose this method because it forces
136 // a certain well understood loading order.
137 String mixinClassName = props.getProperty("ConfigMixin" + count);
138 if (mixinClassName == null) {
139 break;
140 }
141 loadConfigMixin(mixinClassName, props);
142 count++;
143 }
144 }
145
146 }
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