Building Your Event-Driven Architecture : Service Development Help : Icons : Flow Step Icons
Flow Step Icons
A flow step is a basic unit of work (expressed in the webMethods flow language) that Integration Server interprets and executes at run time. The webMethods flow language provides flow steps that invoke services and flow steps that let you edit data in the pipeline.
The following table identifies the icon used for each flow step.
Icon
Step
Description
INVOKE
Executes a specified service.
MAP
Performs specified editing operations on the pipeline (such as mapping variables in the pipeline, adding variables to the pipeline, and dropping variables from the pipeline).
BRANCH
Executes a specified flow step based on the value of a specified variable in the pipeline.
LOOP
Executes a set of flow steps once for each element in a specified array.
REPEAT
Re-executes a set of flow steps up to a specified number of times based on the successful or non-successful completion of the set.
SEQUENCE
Groups a set of flow steps into a series. The SEQUENCE step is implicit in most flow services (that is, the steps in a flow service are treated as a series). However, at times it is necessary to explicitly group a subset of flow steps using SEQUENCE so that they can be treated as a unit.
EXIT
Controls the execution of a flow step (for example, abort an entire flow service from within a series of deeply nested steps, throw an exception without writing a Java service, or exit a LOOP or REPEAT without throwing an exception).
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