Which of the following are capabilities provided by the Mediation Layer?

The Mediation Layer in the Logical View of the Service-Oriented Integration architecture provides
several capabilities. Which of the following are capabilities provided by the Mediation Layer?

The Mediation Layer in the Logical View of the Service-Oriented Integration architecture provides
several capabilities. Which of the following are capabilities provided by the Mediation Layer?

A.
enrichment – adding data elements to a data entity to give the entity increased Information

B.
routing – sending the client request to the appropriate provider (s) based on some criteria

C.
message transformation – converting the request message format to a different message form,
appropriate for the provider

D.
choreography – defining the messages that flow back and forth between systems that are
participating in a business process

E.
protocol mediation – converting a client request from one protocol to a different protocol used by
provider

Explanation:
The Mediation Layer provides loose coupling for the entire architecture. It decouples
the layers of the architecture as well as decoupling external users of the layers from the
specific layers in the architecture.
The key capabilities in this layer include:
* Routing – Routing provides the ability to send the client request to the appropriate
provider based on some criteria. The routing may even include sending the client
request to multiple providers. This capability facilitates location transparency,
versioning, scalability, partitioning, request pipelining, SLA management, etc.
* Protocol Mediation – Protocol mediation is the ability to handle a client request
using one protocol (e.g. WS*, JMS, REST) with a provider using a different
protocol. This provides protocol decoupling between the provider and the
consumer.
Message Transformation – Message transformation allows a client request using
one message format to be handled by a provider that expects a different message
format. This provides message format decoupling between the provider and the
consumer.
* Discovery – Discovery is the mechanism by which a client finds a provider of a
particular SOA Service. Discovery can occur at design time or runtime.
* Monitoring – Monitoring captures runtime information about the messages
flowing through the mediation layer. Since the mediation layer is an intermediary
for message traffic, it provides a centralized monitoring capability.
* Policy Enforcement – Policy enforcement provides consistent application of
policies (e.g. WS-SecurityPolicy) across all messages flowing through the
mediation layer. Since the mediation layer is an intermediary for message traffic, it
provides a centralized policy enforcement capability.
Reference: Oracle Reference Architecture, Service-Oriented Integration, Release 3.0



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