An ActivationMonitor is specific to an
ActivationGroup and is obtained when a group is
reported active via a call to
ActivationSystem.activeGroup (this is done
internally).
An activation descriptor contains the information necessary to
activate an object:
the object's group identifier,
the object's fully-qualified class name,
the object's code location (the location of the class), a codebase URL
path,
the object's restart "mode", and,
a "marshalled" object that can contain object specific
initialization data.
An ActivationGroup is responsible for creating new
instances of "activatable" objects in its group, informing its
ActivationMonitor when either: its object's become
active or inactive, or the group as a whole becomes inactive.
The identifier for a registered activation group serves several
purposes:
identifies the group uniquely within the activation system, and
contains a reference to the group's activation system so that the
group can contact its activation system when necessary.
An UnknownGroupException is thrown by methods of classes and
interfaces in the java.rmi.activation package when the
ActivationGroupID parameter to the method is determined to be
invalid, i.e., not known by the ActivationSystem.
An UnknownObjectException is thrown by methods of classes and
interfaces in the java.rmi.activation package when the
ActivationID parameter to the method is determined to be
invalid.
Package java.rmi.activation Description
Provides support for RMI Object Activation. A remote
object's reference can be made ``persistent'' and later activated into a
``live'' object using the RMI activation mechanism.
Submit a bug or feature For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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