WebLogic Server 8.1 API Reference

weblogic.logging
Class Loggable

java.lang.Object
  |
  +--weblogic.logging.Loggable

public class Loggable

extends java.lang.Object

Loggable objects are used when there is a need to collect log entry data without actually logging the message until a later time. Type casting is weak for the log parameters provided when constructing. The user must ensure that the arguments associated with a particular log message are of the appropriate type and in the correct order.

It is therefore preferable to not explicitly create Loggable objects, rather they should be defined through the relevant message catalog file as follows:

 
  <?xml version="1.0" encoding="UTF-8"?>
  <!DOCTYPE message_catalog PUBLIC "weblogic-message-catalog-dtd" "http://www.bea.com/servers/wls600/msgcat.dtd">
  <message_catalog
     l10n_package="examples"
     i18n_package="examples"
     subsystem="LoggableExample"
     version="1.0"
     baseid="999000"
     endid="999999"
     loggables="true"
     >
     <logmessage
        messageid="999000"
        severity="info"
        method="logExample(String arg1)"
        >
        <messagebody>
           Test message with arg, {0}
        </messagebody>
        <messagedetail>
        </messagedetail>
        <cause>
        </cause>
        <action>
        </action>
     </logmessage>
  </message_catalog>
 
 

The above catalog defines the logExample(String) method plus a logExampleLoggable(String) method. The latter is created due to the presence of the loggables="true" setting for the message_catalog element. The logExample(String) method logs the message and returns the id of the message. The logExampleLoggable(String) method does not log the message, and returns the appropriate Loggable object for the message. Loggable objects are convenient for loggin messages and using the same text in a Throwable. For example,

 
 import examples.LoggableExampleLogger;
 import weblogic.logging.Loggable;
 ...
 // some error detected
 Loggable l = LoggableExampleLogger.logExampleLoggable("whatever");
 l.log();  // this logs the message
 throw new Exception(l.getMessage()); // creates exception with same text as logged
 
 

Author:

Copyright © 2002 BEA Systems, Inc. All Rights Reserved.

Constructor Summary

Loggable(java.lang.String id, java.lang.Object[] args)
Creates object that can be logged to the server log.

Method Summary

java.lang.String	getId() get the message id
java.lang.String	getMessage() get the message in current locale with [subsytem:id] prefix
java.lang.String	getMessage(java.util.Locale l) get the message in specified locale with [subsytem:id] prefix
java.lang.String	getMessageText() get the message in current locale, no prefix
java.lang.String	getMessageText(java.util.Locale l) get the message in specified locale, no prefix
java.lang.String	log() Log the message

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Loggable

public Loggable(java.lang.String id,
                java.lang.Object[] args)

Creates object that can be logged to the server log.

Method Detail

log

public java.lang.String log()

Log the message

getMessage

public java.lang.String getMessage()

get the message in current locale with [subsytem:id] prefix

getMessage

public java.lang.String getMessage(java.util.Locale l)

get the message in specified locale with [subsytem:id] prefix

getMessageText

public java.lang.String getMessageText()

get the message in current locale, no prefix

getMessageText

public java.lang.String getMessageText(java.util.Locale l)

get the message in specified locale, no prefix

getId

public java.lang.String getId()

get the message id