The Research And Application On Migration Component Technology Of Enterprise JavaBeans Objects Based On Mobile Agent

In mobile computing environment, it is essential for component objects to migrate themselves to the server which stores data accessed. That's for realizing the local data access, avoiding the flow of raw data in the network, and reducing a lot of network traffic. Mobile Agent has distributed characteristics; the essence of migration computing of mobile component objects is the thing providing executable computing processes to other machines, but not the one calling services among hosts. The migration of Mobile Agent includes the StrongMigration and the WeakMigration's technology. A Mobile Agent's state has codestate, datestate, and executionstate. WeakMigration only migrates datestate and code, but StrongMigration still migrates executionstate.Among special multi-environment, it is an important problem for us to appropriately provide Mobile Agent objects with efficient management and support for realizing their migration computation. Therefore, this thesis introduces EJB objects' dynamic migration in Mobile Agent's migration, and presents a general AEMCM (Mobile Agent-Based EJB Objects' Migration Component Model) which includes AECMC (Mobile Agent-Based EJB Objects' Code Migration Component), AESMC (Mobile Agent-Based EJB Objects' State Migration Component), and AEMLC (Mobile Agent-Based EJB Objects' Migration Listener Component) for implementing EJB objects' dynamic migration; this research provides the entire analyzing and designing process of the migration component model by using component analysis-based technology, thereby, the nicer encapsulation of migration management's function and component-oriented management's support are implemented; Snapshot Pattern is applied to the mechanism of catching and resuming state information in state migration.In order to solve the problems of message passing in the process of objects' migration, this thesis proposes the relevant discussion and architecture frame; a StrongMigration synchronous message passing algorithms of Mobile EJB objects based on synchronous happening-driven description is adopted and modified, which makes synchronous objects'...