Use the Mediation Policy Administration widget,
to create mediation policies and policy attachments in WebSphere® Service Registry
and Repository (WSRR). Using mediation policies you can control service
interactions, using contextual information.
Before you begin
- Use WebSphere Integration
Developer to create a module containing a Policy Resolution mediation
primitive.
- Deploy the module to WebSphere Enterprise
Service Bus (WebSphere ESB)
or WebSphere Process Server.
- Ensure that WebSphere ESB
or WebSphere Process Server
have a definition for the WSRR that you want to use.
- Load the enterprise archive (EAR) file, containing your module,
into WSRR.
- Create a business space that contains the Module Browser widget
and the Mediation Policy Administration widget.
About this task
You can control service requests dynamically by using
mediation policies to override module properties at run time. Such
mediation policies are stored in WSRR. You can define one or more
mediation policies for your module, and each mediation policy can
override one or more module properties. Optionally, you can create
one or more gate conditions on each policy attachment. When service
requests are processed, gate conditions are compared to the condition
values in the message. All the gate conditions must be met before
an associated mediation policy can be used.
Procedure
- Log on to Business Space.
- Open the business space that you created for administering
mediation policies associated with modules.
- From the Module Browser widget, select Mediation
Policies. The Mediation Policy
Administration widget is refreshed. If there are existing
policy attachments they are displayed.
- From the Mediation Policy Administration widget,
if you have more than one WSRR definition, then select the definition
used by your module. If you change the WSRR definition,
the list of policy attachments changes.
- Click the Edit icon of the policy
attachment that you want to work with. Each policy attachment
row has a pencil icon, at the end of the row, that you can click to
view mediation policy information.
Results
The
Mediation Policy Administration displays
the following information:
- Assertions: The module properties that the mediation policy can
override. In WSRR, the module properties appear as policy assertions.
- Group Name: The group to which the property belongs. By default,
the group name is the name of the mediation flow component.
- Property Name: The alias name of the property. The alias name
identifies the property in the mediation flow.
- Value: The current value in the mediation policy, rather than
the current value in the module. When a mediation policy is available
and suitable, the mediation policy value takes precedence.
- Gate Conditions (Optional): Conditions that must be met before
the mediation policy can be used. In WSRR, gate conditions are user
properties on the policy attachment object.
- Name: The name of a gate condition is always prefixed with the
string medGate_.
- Value: The value of the gate condition, for example, country
= France or Age > 59.