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Java > Open Source Codes > org > apache > avalon > framework > logger > LogKit2AvalonLoggerAdapter


1 /* ====================================================================
2  * The Apache Software License, Version 1.1
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8  * modification, are permitted provided that the following conditions
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53  * <http://www.apache.org/>.
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55
56 package org.apache.avalon.framework.logger;
57
58 import org.apache.log.Hierarchy;
59 import org.apache.log.LogEvent;
60 import org.apache.log.LogTarget;
61 import org.apache.log.Priority;
62
63 /**
64  * A basic adapter that adapts an Avalon Logger to a Logkit Logger.
65  * Useful when providing backwards compatability support for Loggable
66  * components.
67  *
68  * @author <a HREF="mailto:dev@avalon.apache.org">Avalon Development Team</a>
69  * @version CVS $Revision: 1.7 $ $Date: 2003/02/11 15:58:41 $
70  */

71 public final class LogKit2AvalonLoggerAdapter
72     implements LogTarget
73 {
74     /**
75      * The Avalon Logger that we re-route to.
76      */

77     private final Logger m_logger;
78
79     /**
80      * Create a Logkit {@link org.apache.log.Logger} instance that
81      * redirects to an Avalon {@link org.apache.avalon.framework.logger.Logger} instance.
82      *
83      * @param logger the Avalon Logger
84      * @return the LogKit Logger
85      */

86     public static org.apache.log.Logger createLogger( final Logger logger )
87     {
88         final Hierarchy hierarchy = new Hierarchy();
89         final org.apache.log.Logger logKitLogger = hierarchy.getLoggerFor( "" );
90         final LogKit2AvalonLoggerAdapter target =
91             new LogKit2AvalonLoggerAdapter( logger );
92         logKitLogger.setLogTargets( new LogTarget[ ] { target } );
93         return logKitLogger;
94     }
95
96     /**
97      * Constructor for an Adaptor. Adapts to
98      * specified Avalon Logger.
99      *
100      * @param logger the avalon logger.
101      */

102     public LogKit2AvalonLoggerAdapter( final Logger logger )
103     {
104         if( null == logger )
105         {
106             throw new NullPointerException JavaDoc( "logger" );
107         }
108         m_logger = logger;
109     }
110
111     /**
112      * Route a LogKit message to an avalon Logger.
113      *
114      * @param event the log message
115      */

116     public void processEvent( LogEvent event )
117     {
118         final String JavaDoc message = event.getMessage();
119         final Throwable JavaDoc throwable = event.getThrowable();
120         final Priority priority = event.getPriority();
121         if( Priority.DEBUG == priority )
122         {
123             m_logger.debug( message, throwable );
124         }
125         else if( Priority.INFO == priority )
126         {
127             m_logger.info( message, throwable );
128         }
129         else if( Priority.WARN == priority )
130         {
131             m_logger.warn( message, throwable );
132         }
133         else if( Priority.ERROR == priority )
134         {
135             m_logger.error( message, throwable );
136         }
137         else
138         {
139             m_logger.fatalError( message, throwable );
140         }
141     }
142 }
143
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