Transaction processing facility within an operating system environment

A method for supporting a system which provides a transactional environment, including a transaction manager, wherein a group of operations being executed by data resources are organized as a transaction, said method comprising the steps of:

• providing direct access of data between said transaction manager and said data resources;
• supervising at least one of said data resources;
• determining a result of said operations by determining whether said operations are successful or unsuccessful;
• and
• determining a result of said transaction by determining whether said transaction is successful or unsuccessful;
• aborting any transaction including an unsuccessful operation therein;
• and
• committing data to a transaction requestor for all transactions including only successful operations.

A transaction manager which provides a transactional environment wherein a group of operations, being executed by data resources, are organized as a transaction, said transaction manager comprising:

• means for providing direct access of data between said transaction manager and said data resources;
• means for supervising at least one of said data resources, including:
• coordination means for communicating with each of said data resources participating in a specific said transaction, and for maintaining a log which lists said participating data resources and the results of said operations performed by said participating data resources;
• concurrency means for controlling access to said data resources by excluding access to said data resources and detecting any condition, imposed by at least two of said data resources upon one another, where access to said data resources is mutually excluded;
• and
• recovery means for recovering the results of all of said transactions, if a system failure occurs;
• operation outcome means for determining a result of said operations by determining whether said operations are successful or unsuccessful;
• and
• transaction outcome means for determining a result of said transaction by determining whether said transaction is successful or unsuccessful, and operating to abort any transaction including an unsuccessful operation and committing data to a transaction requestor for all transactions including only successful operations.

A method for supporting a system which provides a transactional environment, including a transaction manager, wherein a group of operations being executed by data resources are organized as a transaction, said method comprising the steps of:

• providing direct access of data between said transaction manager and said data resources;
• supervising at least one of said data resources, including the steps of:
• communicating with said data resources participating in a specific said transaction;
• maintaining a log which lists said participating data resources and a result of said operations performed by said participating data resources;
• controlling access to said data resources by excluding access to said data resource and detecting any condition imposed, by at least two of said data resources upon one another, where access to said data resources is mutually excluded;
• and
• recovering the results of all of said transactions, if a system failure occurs;
• determining a result of said operations by determining whether said operations are successful or unsuccessful;
• and
• determining a result of said transaction by determining whether said transaction is successful or unsuccessful, including aborting any transaction including an unsuccessful operation and committing data to a transaction requestor for all transactions including only successful operations.

A computer program product, to be implemented in conjunction with a data processing system, wherein a group of operations, being executed by data resources, are organized as a transaction including a transaction manager, said product comprising:

• means for providing direct access of data between said transaction manager and said data resources;
• means for supervising at least one of said data resources;
• operation outcome means for determining a result of said operations by determining whether said operations are successful or unsuccessful;
• and
• transaction outcome means for determining a result of said transaction by determining whether said transaction is successful or unsuccessful and operating to abort any transaction including an unsuccessful operation and committing data to a transaction requestor for all transactions including only successful transactions.