persistent object


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Related to persistent object: hibernate

persistent object

In object technology, a persistent object is one that continues to exist after the program that created it has been unloaded. An object's class and current state must be saved for use in subsequent sessions. See object-oriented programming.
References in periodicals archive ?
It is fault-tolerant--crashes of clients or servers during garbage collection will not corrupt the state of the persistent object space.
Initially, such movement will be under programmer control, but we will need to devise ways in which the placement of objects can be controlled automatically by the system itself, in much the same way that persistent objects migrate from disk to main memory and back again without direct programmer intervention.
Data is transparently accessed from the shared persistent object space, and the results are stored in a shared persistent object space for later use.
The POA supports two types of CORBA objects: the persistent object originally specified by CORBA, and a new shorter-lived object called a transient object.
An examination of operating system support for persistent object systems.
These facilities sped debugging and simplified the code of many parts of the operating system, for example, the file system, application interface, name servers, and persistent object code.
Persistent Object Stores: Object managers such as Mneme [11] and ObServer [17[ have been built without all the functionality of the DBMSs described here.
Also, when an object o is no longer referenced by any other persistent object or value, the space it occupies in memory and on disk is recovered if the object is not attainable by any temporary variable or any temporary object.
This program opens an existing database, creates a new persistent object of class employee, adds the new employee to an existing department, and sets the salary of the employee to 1,000.

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