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Date: Tue, 23 Nov 2004 17:22:18 +0100
Message-Id: <200411231622.iANGMI7q003278@ajax.apache.org>
From: bugzilla@apache.org
To: commons-dev@jakarta.apache.org
Subject: DO NOT REPLY [Bug 32362]  New:  -
    AttributeChangeNotification sent before attribute changes

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http://issues.apache.org/bugzilla/show_bug.cgi?id=32362

           Summary: AttributeChangeNotification sent before attribute
                    changes
           Product: Commons
           Version: 4.0
          Platform: PC
        OS/Version: Windows 2000
            Status: NEW
          Severity: blocker
          Priority: P1
         Component: Modeler
        AssignedTo: commons-dev@jakarta.apache.org
        ReportedBy: EXTERNAL.Z19PMOUA@decathlon.com


I don't know if it's a bug, but in the class 
org.apache.commons.modeler.BaseModelMBean, the Notification that an attribute 
value changed is sent before the value changes (The developer seemed to have a 
doubt // XXX Is it before or after ?), so I have the following problem.
I have an MBean that extends BaseModelMBean and implements NotificationListener 
to get informed of modification on the ManagedResource, but since the 
notification is sent before the value is modified, I can't rely on the state of 
the managed resource.
Furthermore, in the Javadocs, they say:
It's up to the MBean owning the attribute of interest to create and send 
attribute change notifications when the attribute change occurs

And for ATTRIBUTE_CHANGE => Notification type which indicates that the observed 
MBean attribute value HAS CHANGED.

The JAR Version is :
Implementation-Version: 1.1.0

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