International Business Machines Corporation

Keith Whittingham

Joerg Bischof

Heiko H Ludwig

Disclosed is a means and a method for executing a nested transaction in an execution environment supporting flat transactions only. To process a StartTransaction operation within a nested transaction it is suggested to check whether the StartTransaction operation is on the first nesting level of the nested transactions. An actual transaction within the execution environment by issuing a corresponding StartTransaction is started only in the affirmative case but not otherwise. To process a CommitTransaction operation within a nested transaction to successfully terminate a transaction it is suggested to check whether the CommitTransaction operation is on the first nesting level of the nested transaction. An actual transaction within the execution environment will be terminated only by issuing a corresponding CommitTransaction operation in the affirmative case but not otherwise. To process a RollbackTransaction operation within a nested transaction aborting a transaction as unsuccessful, it is suggested to issue a corresponding RollbackTransaction operation within the execution environment independent from the nesting level of said RollbackTransaction operation.

Mechanism for executing nested transactions in an execution environment supporting flat transactions only

A method and a computer network for interconnecting a first server computer () of a service requestor () and a second server computer () of a service provider (), each of the first server computer () and the second server computer () being connected to at least one client computer (), the first server computer () running a first workflow management system application (), and the second server computer () running a second workflow management system application (), the method comprising providing a first and a second connector application () for permitting the first server computer () access to a copy of the first connector application () and for permitting the second server computer () access to a copy of the second connector application (), wherein the copies of the first and the second connector application () each comprises a connection agreement () for a first work task () of a first workflow instance () encompassed by the first workflow management system application ().

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Langnau, Switzerland

Keith Whittingham