What is the use of pointing a person to a URL??
Anyway
Business Process Engine is a BPEL engine based WS 1.1 specification for Business Process Execution.
XI integration server has three components associated with such as
Integration Engine, Adaptor Engine and Business Process Engine. All of these three component together we call (Integration Server)
Integration server receives or sends the messages between business parties, who has implementation of the services defined by the interface contracts.
When an integration server encounter a service call involving BPEL process it transfer the control to the process engine. Inside the process engine, process will be executed in an asynchronous mode where each node of the process is binded to single transaction and work unit. Each work unit uses a dynamic queue to move the message data between the nodes.
BPEL do has standards node specification and each node has specific need and purpose.
A BPEL process with all type of possible node in a BPEL engine will be state full in nature, transaction oriented, resource consuming.
BPEL engine split a synchronous request into number of asynchronous calls associated with separate context and resources.
BPEL engine also use parallel computing to achieve optimized computing for a long running process. BPEL engine use transaction, messaging, context, work unit and all system resources etc to full fill the need of a state full process.
Once the integration process engine complete the operation on a business process, it will return control to the Integration Server so that it can full fill the service invocation between service consumer and provider.
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