Service Message Object (SMO) provides an abstraction
layer for processing and manipulating messages exchanged between services.
Data passing through mediation flows is represented by
the SMO.
Overview of contexts:-
The Service Message Object (SMO) context lets mediation
primitives pass data between themselves that is not part of the message
payload. SMO context objects are either user-defined or system-defined.
What are system-defined context
objects?
The following context objects are system-defined:
failInfo: Context
is used to hold exception information.
primitiveContext: The object contains information used by
specific mediation primitives.
dynamicProperty: The
object is used to override promoted properties.
What are user-defined context
objects?
You can use user-defined context objects to store
properties that can be accessed by mediation primitives later in the flow.
The following context objects are user-defined:
Transient: Enables primitives to pass values to
each other in the current flow.
correlation: Enables primitives to pass values from
the request flow to its response flow.
shared: Shares values between all branches of a
flow.
user: Passes values not part of the message
payload between the SCA components.
What is Mediation Sub flow ?
A mediation subflow is a pre-configured set of mediation
primitives that are wired together to realize a common pattern or use case.
Mediation subflows are run in the context of a parent flow, and can be reused
in mediation flows or in subflows.
Use mediation subflows to reuse common patterns in
mediation flows, and also as a way to group primitives in the Mediation Flow
editor.
A mediation subflow can be created in a module, mediation
module, or library. A mediation subflow must be used within a mediation flow.
It is good practice to store subflows in libraries so that they can be easily shared
between mediation flows in different modules.
Can We use Context Objects in
Mediation Subflow?
You cannot specify a context element within a subflow.
Context elements that are available in the parent flow are also available to
mediation primitives in the subflow.
You can download PI
from below link(BPMv8.0)
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