Integration Server 10.3 | Web Services Developer’s Guide | SOAP Message Exchange Patterns | How the MEP Affects the Execution of Handlers
 
How the MEP Affects the Execution of Handlers
Web service descriptors usually have several handlers assigned to them. A handler is a set of up to three handler services: a request handler service, response handler service, and a fault handler service. Depending on the MEP type, Integration Server might not execute the response and fault handler services. For more information, see About Handlers and Handler Services.