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Java Standard Edition (SE)

PersistentMBean


compact3
javax.management

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
    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method and Description
      void load()
      Instantiates thisMBean instance with the data found for the MBean in the persistent store.
      void store()
      Captures the current state of this MBean instance and writes it out to the persistent store.
    • Method Detail

      • store

        void store()
            throws MBeanException,
                   RuntimeOperationsException,
                   InstanceNotFoundException
        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'
           = "onUnregister"
         

        Do not store the MBean if 'persistPolicy' field is:

            = "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


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