US 2008/0167925 A1 · EFFICIENT PROCESSING OF A CONVOY WORKFLOW SCENARIO IN A MESSAGE DRIVEN PROCESS

Abstract

An XLANG/s compiler detects convoy scenarios during compilation and generates runtime directives to correctly correlate incoming messages with business process instances. A convoy scenario, present in event driven processes, is defined by a correlation set initialized during a receive operation which is provided to a subsequent receive operation. The compiler detects those convoy scenarios by analyzing the control and dataflow of a XLANG/s program. Three convoy patterns are distinguished: (1) activation convoys, (2) uniform sequential convoys, and (3) non-uniform sequential convoys. XLANG/s allows declarative descriptions of convoy scenarios without requiring an understanding of the low-level details supporting their correct execution. Convoy scenarios are processed by statically analyzing a written workflow application to deduce the nature and type of convoy scenarios used by the application. Information is extracted at compile time to support the runtime infrastructure. The runtime infrastructure is tightly integrated with the underlying correlation and subscription evaluation framework.

Claims8

Dependent claims

A computer-implemented method for processing convoy scenarios in a message driven process, said method comprising:

determining if a subscription is associated with a convoy set;
if a subscription is associated with a convoy set, determining if a message associated with said subscription has convoy properties;
if said message associated with said subscription has convoy properties, searching existing convoy set instances for a convoy instance having said convoy properties;
if a convoy set instance is found having said convoy properties:
determining:
if an identifier of an instance of said subscription is equivalent to an identifier of said convoy set instance;
and
if an identifier of a subscription service instance is null;
and
if said subscription instance identifier is equivalent to said convoy set instance identifier or said subscription service instance identifier is null, setting said subscription service instance identifier to said convoy set instance identifier for a copy of said subscription;
and
if a convoy set instance is found having said convoy properties, creating a new convoy set instance.

9 more elements

A computer readable storage medium encoded with a computer program code for directing a computer processor to process convoy scenarios in a message driven process, said program code comprising:

a determine subscription association code segment for causing said computer processor to determine if a subscription is associated with a convoy set;
a determine message association code segment for causing said computer processor to, if a subscription is associated with a convoy set, determine if a message associated with said subscription has convoy properties;
a search code segment for causing said computer processor to, if said message associated with said subscription has convoy properties, search existing convoy set instances for a convoy instance having said convoy properties;
an identify code segment for causing said computer processor to, if a convoy set instance is found having said convoy properties:
determine:
if an identifier of an instance of said subscription is equivalent to an identifier of said convoy set instance;
and
if an identifier of a subscription service instance is null;
and
a set code segment for causing said computer processor to, if said subscription instance identifier is equivalent to said convoy set instance identifier or said subscription service instance identifier is null, set said subscription service instance identifier to said convoy set instance identifier for a copy of said subscription;
and
a create code segment for causing said computer processor to, if a convoy set instance is found having said convoy properties, create a new convoy set instance.

9 more elements

Dependencies are inferred from the claim text.

Efficient processing of a convoy workflow scenario in a message driven process

Life of this patent

Efficient processing of a convoy workflow scenario in a message driven process

Life of this patent

Abstract

Claims8