I have a problem with singleton in cluster environment .
first ,there is a singleton mbean ,and I use jmx-console to test it , the singleton
works well like the jboss cluster document said,the mbean's MasterNode has the same
value with mbean-singletonController's MasterNode,and turn "true" or "false" at the
same time.and in the cluster there is only one MasterNode that its value is "true".
the problem is ,each JVM has a singletMBean instance and had been register. when I
use
MBeanServer server=MBeanServerFactory.findMBeanServer();
ObjectName name = new ObjectNam("jboss.singlton:service=Singleton");
Object obj = server.getAttribute(name, "Client");
to get an Object(obj), it will not always get the same one that get from
SingletonMBean .Because there are two SingletonMBean .
So now I am confused about what is a singleton.
I had thought that if a mbean is deployed as singleton ,it has the same instance in
all JVMs ,or just the MasterNode JVM has the singleton's instance and other has not
the instance of singleton.
I am confused about what service the singlet mbean supports .and how to use it .
It is very important to me. my lot of work based on it .
anticipates anyone's help.
thank you in advance!!!!
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