Transaction Processing Middleware provides tools and an environment for developing transaction-based distributed applications. An ideal TP system will be able to input data into the system at the point of information source and the output of the system is delivered at the point of information sink. In an ideal TI' system, the device for input and output can potentially be different (Figure 2.3). Also, the output can be an unsolicited message for a device. TI' is used in data management, network access, security systems, delivery order processing, airline reservations, customer service, etc. to name a few. TP systems are generally capable of providing services to thousands of clients in a distrib-uted client/server environment. CICS (Customer Information Control System) is one of the early. TP application systems on IBM mainframe computers.
TI' middleware maps numerous client requests through application-service routines to different application tasks. In addition to these processing tasks, TP rniddleware includes numerous management features, such as restarting failed processes, dynamic load balancing and enforcing consistency of distributed data. TI' midclleware is independent of the database architecture. TI' middleware optimizes the use of resources by multiplexing many client
TI' middleware maps numerous client requests through application-service routines to different application tasks. In addition to these processing tasks, TP rniddleware includes numerous management features, such as restarting failed processes, dynamic load balancing and enforcing consistency of distributed data. TI' midclleware is independent of the database architecture. TI' middleware optimizes the use of resources by multiplexing many client
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