Web services

To invoke a service that is provided by others or to provide a service that others invoke, use the Web Services system functions: Invoke, Receive, and Reply.

Invoke system function
Use the Invoke system function to request a Web Service.
Invoke system function: Web Services-ReliableMessaging
You can use WS-ReliableMessaging technology to provide assurance that an Invoke message is received by the target Web Service. To achieve the reliability, a standardized series of messages is exchanged between the sender and the receiver. In addition, each message is sent repeatedly until the expected acknowledgement message is received.
Receive system function
Use the Receive system function to provide a Web Service that can be invoked. The Receive step can be at any location in the workflow.
Reply system function
Use the Reply system function to send a response to a request that was previously accepted through a Receive system function. The reply message is sent to the Invoke step.
Correlating web conversations
A correlation set provides an identifier between two Web Services so that one can identify an appropriate message from another. For example, with purchase orders, there might be several exchanges of messages between the buyer and the seller. You need to ensure that each message stays with the appropriate conversation.
About Web Services-ReliableMessaging
While most uses of web services find the standard messaging mode adequate for their purposes, some applications require a mechanism to ensure that a request for a web service reached its intended target, or that a response from a web service reached the original requesting application.
Web Services-ReliableMessaging states
Faults have an associated status message.

Parent topic: System functions