Interface PersistentMBean

All Known Subinterfaces:

ModelMBean

All Known Implementing Classes:

RequiredModelMBean

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

Methods

load

void load()
   throws MBeanException,
          RuntimeOperationsException,
          InstanceNotFoundException

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.

Throws:

MBeanException - Wraps another exception or persistence is not supported

RuntimeOperationsException - Wraps exceptions from the persistence mechanism

InstanceNotFoundException - Could not find or load this MBean from persistent storage

store

void store()
    throws MBeanException,
           RuntimeOperationsException,
           InstanceNotFoundException

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

= "never"
    = "onUpdate"
    = "onTimer" && now < 'lastPersistTime' + 'persistPeriod'

Throws:

MBeanException - Wraps another exception or persistence is not supported

RuntimeOperationsException - Wraps exceptions from the persistence mechanism

InstanceNotFoundException - Could not find/access the persistent store