Abstract: An apparatus for dispatching client requests within a server computer system, wherein the client requests are issued from at least one client computer system on a different platform from said server computer system and are passed through a communications channel to said server computer system, the apparatus comprising: a buffer having an input connected to said communications channel and an output; a plurality of parallel execution threads connected to said output of said buffer; and a scheduling means for distributing client requests stored in said buffer to said plurality of execution threads in a manner such that related client requests are sent to the same execution thread.

Abstract: A method and system for implementing a Restart Service for the Object Transaction Service are described. The present invention provides a method and system which trigger restart of an OTS instance upon system recovery or upon system failure. The Restart Service runs independently of the client or server processes which it restarts. When a client or server enters a pending state for a transaction, a permanent record containing information to allow the OTS instance to be restarted is stored in a Restart Repository. In the event of system recovery being needed, or of a system failure, a Restart Daemon reads information from the Restart Repository and recreates the process context. The Recovery Service is initialized and log data replayed to a Transaction Manager to determine the outcome of pending transactions. Failed objects and instances of the OTS are restarted.

Abstract: The invention provides a mechanism to integrate differing transaction protocols by augmenting an existing Resource Manager to act as both a Transaction Manager and a Resource Manager within a system which also contains a standards-based Transaction Manager which has overall transaction management responsibility. The Transaction Manager within the Resource Manager acts as an interface to provide specific mappings between the Transaction Manager which has overall transaction management responsibility and a proprietary transaction processing system which it manages. The interface is required to map different transaction identification specifications, record appropriate state information and have procedures to effect failure and restart scenarios.

Abstract: The invention allows the participation of a resource manager in a transaction which is coordinated by a transaction manager with which the resource manager's protocols are not compatible. More particularly, a mapper records a connection reference which the application program obtains from the resource manager and a transaction reference which the application program obtains from the transaction manager. The resource manager stores recovery information in an associated log file.

Abstract: A chemical species, present in two oxidation states which differ from one another by one equivalent, is added to pigment materials to serve as a recombination center for alternately capturing electrons and holes produced by the pigment materials when they are subjected to ultraviolet light exposure.