[ http://jira.jboss.com/jira/browse/JBJMX-3?page=history ]
Scott M Stark reassigned JBJMX-3:
---------------------------------
Assign To: Scott M Stark (was: Adrian Brock)
I added a simple extension to the 4.0 branch
org.jboss.test.jbossmx.compliance.monitor.BasicTestCase to access the
ObservedObjects in the testCounterSimpleNotification, and this now fails with a
ClassCastException:
public void testCounterSimpleNotification()
throws Exception
{
try
{
monitored = new CounterSupport();
observedObject = new ObjectName("Monitor:type=CounterSupport");
observedAttribute = "Value";
startCounterService(false, 0, 0, 10);
ObjectName[] observed = (ObjectName[])
server.getAttribute(this.monitorName,
"ObservedObjects");
setAttribute(null, 0);
setAttribute(new Integer(10), 1);
setAttribute(new Integer(9), 1);
setAttribute(new Integer(10), 2);
}
finally
{
stopMonitorService();
}
}
Caused by: java.lang.ClassCastException
at javax.management.monitor.Monitor.getObservedObjects(Monitor.java:164)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at
org.jboss.mx.interceptor.AttributeDispatcher.invoke(AttributeDispatcher.java:81)
... 23 more
> Fix ClassCastException in
> javax.management.monitor.Monitor.getObservedObjects()
> -------------------------------------------------------------------------------
>
> Key: JBJMX-3
> URL: http://jira.jboss.com/jira/browse/JBJMX-3
> Project: JBoss JMX
> Type: Patch
> Environment: At least from Jboss 3.2.5. Still in HEAD.
> Reporter: Christopher Day
> Assignee: Scott M Stark
>
>
> When trying to access a StringMonitor from jmx-console, I get a
> ClassCastException from
> javax.management.monitor.Monitor.getObservedObjects(). This is because the
> method incorrectly iterates over the keys of the observedObjects HashMap,
> rather than the values. The Exception is raised when the iterator.next() is
> cast to an ObservedObject, since the keys are ObjectNames. The following
> patch fixes the problem.
> --- Monitor.java 2004-12-22 16:57:52.207142400 -0800
> +++
> /cygdrive/c/jboss-3.2.5-src/jmx/src/main/javax/management/monitor/Monitor.java
> 2004-01-02 13:56:54.000000000 -0800
> @@ -181,7 +181,7 @@
> public ObjectName[] getObservedObjects()
> {
> - Set set = new HashSet(observedObjects.values());
> + Set set = new HashSet(observedObjects.keySet());
> elementCount = set.size();
> ObjectName[] result = new ObjectName[set.size()];
> alreadyNotifieds = new int[set.size()];
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