International Business Machines Corporation

Joerg Bischof

Keith Whittingham

Thomas Eirich

Dirk Husemann

Stefan Georg Hild

Marcus B Oestreicher

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 computerized method and a system for implementing in a network distributed applications, comprising instructions for a computer process which are executable on different locations in the network, is proposed. The instructions include an assert-command and/or a release-command.

Computerized method and system for implementing distributed applications

This invention concerns methods for the protection of resources in an open digital communication system, which resources are residing in or owned by physically and organizationally distributed, independent entities connected through that system, e.g. the Internet. Since, in such an open system, any entity can in principle access any resource of any other entity, precautions must be taken to avoid or minimize the danger of resource corruption and destruction, to maintain privacy and, where necessary, confidentiality. Thus, protection of resources is of ultimate importance to warrant integrity and function of an entity. For the intelligent protection of such resources, in particular against unauthorized access, a variable-grained control of the name space (consisting of all names an entity provides) and/or the provision of attachable and detachable guards accompanying each call for a file and/or service is provided.

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Zurich, Switzerland

Joerg Bischof