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1
50 package org.apache.avalon.excalibur.monitor;
51
52 import java.lang.reflect.Constructor  ;
53 import java.util.ArrayList ;
54
55 import org.apache.avalon.framework.configuration.Configuration;
56 import org.apache.avalon.framework.logger.Logger;
57
58
65 class MonitorUtil
66 {
67 private static final Class [] c_constructorParams =
68 new Class []{String .class};
69
70 public static Resource[] configureResources( final Configuration[] resources,
71 final Logger logger )
72 {
73 final ArrayList results = new ArrayList ();
74 for( int i = 0; i < resources.length; i++ )
75 {
76 final Configuration initialResource = resources[ i ];
77 final String key =
78 initialResource.getAttribute( "key", "** Unspecified key **" );
79 final String className =
80 initialResource.getAttribute( "class", "** Unspecified class **" );
81
82 try
83 {
84 final Resource resource = createResource( className, key );
85 results.add( resource );
86
87 if( logger.isDebugEnabled() )
88 {
89 final String message =
90 "Initial Resource: \"" + key + "\" Initialized.";
91 logger.debug( message );
92 }
93 }
94 catch( final Exception e )
95 {
96 if( logger.isWarnEnabled() )
97 {
98 final String message =
99 "Initial Resource: \"" + key +
100 "\" Failed (" + className + ").";
101 logger.warn( message, e );
102 }
103 }
104 }
105
106 return (Resource[])results.toArray( new Resource[ results.size() ] );
107 }
108
109 private static Resource createResource( final String className,
110 final String key )
111 throws Exception
112 {
113 final ClassLoader loader = Thread.currentThread().getContextClassLoader();
114 final Class clazz = loader.loadClass( className );
115 final Constructor initializer =
116 clazz.getConstructor( c_constructorParams );
117 return (Resource)initializer.newInstance( new Object []{key} );
118 }
119 }
120 |
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