Mark Little was Chief Architect, Transactions for Arjuna Technologies Ltd, a UK-based company specialising in the development of reliable middleware that was recently acquired by JBoss, Inc. Before Arjuna, Mark was a Distinguished Engineer/Architect within HP Arjuna Labs in Newcastle upon Tyne, England, where he led the HP-TS and HP-WST teams, developing J2EE and Web services transactions products respectively. He is one of the primary authors of the OMG Activity Service specification and is on the expert group for the same work in J2EE (JSR 95). He is also the specification lead for JSR 156: Java API for XML Transactions. He's on the OTS Revision Task Force and the OASIS Business Transactions Protocol specification. Before joining HP he was for over 10 years a member of the Arjuna team within the University of Newcastle upon Tyne (where he continues to have a Visiting Fellowship). His research within the Arjuna team included replication and transactions support, which include the construction of an OTS/JTS compliant transaction processing system. Mark has published extensively in the Web Services Journal, Java Developer's Journal and other journals and magazines. He is also the co-author of several books including “Java and Transactions for Systems Professionals” and “The J2EE 1.4 Bible.”
In July 2002, BEA, IBM, and Microsoft released a trio of specifications
designed to support business transactions over Web services. These
specifications - BPEL4WS, WS-Transaction, and WS-Coordination - together form
the bedrock for reliably choreographing Web services-based applications,
providing business process management, transactional integrity, and generic
coordination facilities respectively.
This article introduces the underlying concepts of Web Services Coordination,
and shows how a generic coordination framework can be used to provide the
foundations for higher-level business processes. In future articles, we will
demonstrate how coordination allows us to move up the Web services stack to
encompass WS-Transaction and on to BPEL4WS.
Coordination
In general ter... (more)
In July 2003 a consortium of Web services vendors released the Web services
Composite Application Framework (WS-CAF) to the community. WS-CAF is
comprised of three specifications that together provide a means of reliably
composing individual Web services into larger aggregate applications. The
cornerstone of this suite is the management of stateful interactions between
Web services that ... (more)
Web services have become the integration platform of choice for enterprise
applications. Those applications by the very nature of their enterprise-scale
components can be complex in structure, which is compounded by the need to
share common data or context across business processes supported by those
applications. Those processes may be very long lived, and may contain periods
of inactiv... (more)
In July 2002, BEA, IBM, and Microsoft released a trio of specifications
designed to support business transactions over Web services. These
specifications, BPEL4WS, WS-Transaction, and WS-Coordination, together form
the bedrock for reliably choreographing Web services-based applications,
providing business process management, transactional integrity, and generic
coordination facilities re... (more)
Use of atomic transactions is a well-known technique for guaranteeing
consistency in the presence of failures. The ACID properties of atomic
transactions (Atomicity, Consistency, Isolation, Durability) ensure that even
in complex business applications consistency of state is preserved.
Transactions are best viewed as "short-lived" entities operating in a closely
coupled environment, perfo... (more)
Mark Little was Chief Architect, Transactions for Arjuna Technologies Ltd, a UK-based company specialising in the development of reliable middleware that was recently acquired by JBoss, Inc. Before Arjuna, Mark was a Distinguished Engineer/Architect within HP Arjuna Labs in Newcastle upon Tyne, England, where he led the HP-TS and HP-WST teams, developing J2EE and Web services transactions products respectively. He is one of the primary authors of the OMG Activity Service specification and is on the expert group for the same work in J2EE (JSR 95). He is also the specification lead for JSR 156: Java API for XML Transactions. He's on the OTS Revision Task Force and the OASIS Business Transactions Protocol specification. Before joining HP he was for over 10 years a member of the Arjuna team within the University of Newcastle upon Tyne (where he continues to have a Visiting Fellowship). His research within the Arjuna team included replication and transactions support, which include the construction of an OTS/JTS compliant transaction processing system. Mark has published extensively in the Web Services Journal, Java Developer's Journal and other journals and magazines. He is also the co-author of several books including “Java and Transactions for Systems Professionals” and “The J2EE 1.4 Bible.”
Bob Snyder
Alf Pilgrim
Per Sjofors
Kirsten Lytsen
Data Recovery Services
Colin Armitage
