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Generated January 20, 2018

System and method for enabling atomic class loading in an application server environment

Patent Number: 6,845,503

Patent Information

Abstract
Disclosed is a system and method for enabling dynamic class reloading in the application server environment. Users may specify class versionability by specifying a list of explicitly versionable classes; and the application server(s) may execute a background task which operates periodically to check modified versionable classes, and cause the classes to be reloaded. Administrators may specify a set of class files to be treated as a “bundle”. When the bundle is deployed, a deployer manager may obtain a lock, e.g. a semaphore, referred to as the “dirtyClassListLock”. Once this lock is obtained, the deployer manager may copy all the class files in the bundle from a deployment environment to their appropriate runtime locations. After the runtime locations have been updated, the deployer manager may release the dirtyClassListLock. According to this method, the background task that checks for and reloads modified classes may also have to obtain the dirtyClassListLock in order to run. Thus, the background task will discover and reload class files in the bundle atomically.
Patent Number: 6,845,503
Issue Date: 2005-01-18

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Citations

Patents cited by this patent

Patent Title
6,597,366 Transparent general purpose object isolation for multi-tier distributed object environments
6,519,594 Computer-implemented sharing of java classes for increased memory efficiency and communication method
6,415,435 Method and apparatus for determining compatibility of parent classes in an object oriented environment using versioning
6,243,706 System and method for managing the creation and production of computer generated works
6,237,092 Client-server system with central application management allowing an administrator to configure user and group contexts during application configuration without relaunching the application
6,226,788 Extensible network management system
6,175,855 Method for instantiating a class having different versions
6,112,304 Distributed computing architecture
5,966,702 Method and apparatus for pre-processing and packaging class files
5,920,725 Run-time object-synthesis and transparent client/server updating of distributed objects using a meta server of all object descriptors

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