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PersistentMBean.javaAPI DocJava SE 5 API3634Fri Aug 26 14:57:34 BST 2005javax.management

PersistentMBean

public interface PersistentMBean
This class is the interface to be implemented by MBeans that are meant to be persistent. MBeans supporting this interface should call the load method during construction in order to prime the MBean from the persistent store. In the case of a ModelMBean, the store method should be called by the MBeanServer based on the descriptors in the ModelMBean or by the MBean itself during normal processing of the ModelMBean.
since
1.5

Fields Summary
Constructors Summary
Methods Summary
public voidload()
Instantiates thisMBean instance with the data found for the MBean in the persistent store. The data loaded could include attribute and operation values. This method should be called during construction or initialization of this instance, and before the MBean is registered with the MBeanServer.

exception
MBeanException Wraps another exception or persistence is not supported
exception
RuntimeOperationsException Wraps exceptions from the persistence mechanism
exception
InstanceNotFoundException Could not find or load this MBean from persistent storage

public voidstore()
Captures the current state of this MBean instance and
writes it out to the persistent store. The state stored could include
attribute and operation values. If one of these methods of persistence is
not supported a "serviceNotFound" exception will be thrown.


Persistence policy from the MBean and attribute descriptor is used to guide execution
of this method. The MBean should be stored if 'persistPolicy' field is:

 != "never"
= "always"
= "onTimer" and now > 'lastPersistTime' + 'persistPeriod'
= "NoMoreOftenThan" and now > 'lastPersistTime' + 'persistPeriod'


Do not store the MBean if 'persistPolicy' field is:
= "never"
= "onUpdate"
= "onTimer" && now < 'lastPersistTime' + 'persistPeriod'

exception
MBeanException Wraps another exception or persistence is not supported
exception
RuntimeOperationsException Wraps exceptions from the persistence mechanism
exception
InstanceNotFoundException Could not find/access the persistent store