International Business Machines Corporation

Gerhard Pfau

Frank Neumann

Dieter Helmut Roller

Frank Leymann

Andreas Arning

Matthias Kloppmann

Friedemann Schwenkreis

Andreas Schmitz

Claudia Zentner

Jonas Grundler

Data entities in a client-server system are accessed. The client-server system comprises a set of clients, a server system, and a repository for storing a plurality of data entities. The server system comprises an inter-transactional cache, the inter-transactional cache being accessible for each client of the set of clients. A first client of the set of clients comprises a first intra-transactional cache. If a copy of a first data entity is in the inter-transactional cache, a version identifier of the original first data entity is read from the repository. If the copy of the first data entity is to be accessed with an exclusive lock, a copy of the copy of the first data entity is added to the first intra-transactional cache. The copy of the copy of the first data entity in the first intra-transactional cache is accessed for further processing of the first data entity by the first client.

Accessing data entities

Method and system for providing results for task list queries to Workflow Management Systems (WfMSs) and Human Task Management Systems (HTMSs). In one aspect, a method for providing the result of a task list query to a human task database includes caching data from the database in a plurality of materialized views. A new request for a list of tasks from the database is received, and a new query is created when the new request applies to the data in a particular materialized view. When the particular materialized view includes data that requires updating from more recent data in the database, the materialized view is so updated. The new query is executed against the data in the materialized view instead of executing the new query against the data in the database.

Method and system for response time optimization for task list retrieval from databases

Transactions within a process model are determined by grouping a set of individual process activities into a single transaction. This effectively reduces the processing overhead, and, therefore, improves the overall throughput and latency of the execution of the process model. The transaction is determined by performing an optimization procedure that takes into account the structure of the process model as well as various properties of the single process activities of the process model. Analysis of the properties of the process activities as well as application of the optimization procedure is performed dynamically during execution of the process model by a workflow engine.

Dynamic determination of transaction boundaries in workflow systems

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Breitenstein, Germany

Gerhard Pfau