Unisys Corporation

Steven L Kayser

Diane E Schaefer

Steven L Rajcan

Robert S Baker

An interconnect for enabling a component in a transaction processing environment to request, as part of a global transaction under the control of a transaction manager that is not XATMI-compliant, a resource on a remote server outside of that environment that is under the control of an XATMI-compliant transaction manager, comprises a resource manager and a connection manager. The resource manager has a first interface that receives XATMI service requests from the component and a second interface that receives directives issued by the first transaction manager for the global transaction. The resource manager (i) translates the XATMI service requests and directives into corresponding service requests of a bi-directional two-phase commitment communications protocol, (ii) issues the corresponding service requests to a protocol machine of the connection manager, and (iii) coordinates the processing of the corresponding service requests by the protocol machine with the processing of corresponding events in the transaction processing environment of the first transaction manager. The resource manager further comprises (i) means for mapping a first identifier that identifies the global transaction within the transaction processing environment of the first transaction manger to a second identifier that uniquely identifies the transaction within the protocol machine, (ii) means for maintaining a record for each branch of the transaction in which information relating thereto is stored, and (iii) means for logging together, in a secure storage, recovery information for both the transaction processing environment of the first transaction manager and the protocol machine.

Methods and apparatus for enabling a component in a first transaction

Multiple OSI TP service requests to which a particular AP-CRM interface call is mapped, and which are normally processed as individual events by an OSI TP protocol machine that conforms to the OSI TP Protocol Specification, are concatenated and processed by a modified OSI TP protocol machine as a single, atomic event. In this manner, performance and throughput are increased, while still maintaining conformance with the OSI TP Standard. Processing of OSI TP service requests will thus be optimized for the particular AP-CRM interface that the distributed transaction processing system supports. A new CRM-OSI TP programming interface is provided in place of the standard XAP-TP programming interface. The new interface maps each service of the particular AP-CRM interface to a respective, single service request of the new interface. Each service request of the new interface represents a concatenation of the OSI TP services to which the corresponding service of the particular AP-CRM is normally mapped.

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Paoli, PA, United States of America

Steven L Kayser