26 Using IBM WebSphere Message Broker as an ESB with WebSphere Process Server
3.2.4 User Name Server
A User Name Server is an optional component that is required only when
publish/subscribe message flow applications are running, and where extra
security is required for applications to publish or subscribe to topics. The User
Name Server provides authentication for topic-level security for users and groups
that perform publish/subscribe operations.
3.2.5 Broker domain
Brokers are grouped together in broker domains. A broker domain contains one
or more brokers and a single Configuration Manager. It can also contain a User
Name Server. The components in a broker domain can exist on multiple
machines and operating systems, and are connected together with WebSphere
MQ channels. A broker belongs to only one broker domain.
3.3 Development environment of WebSphere Message
Broker
In this section, we provide a brief introduction to the development environment of
WebSphere Message Broker and the various mediation capabilities that it offers.
3.3.1 Message Brokers Toolkit
The Message Brokers Toolkit is an integrated development environment (IDE)
and graphical user interface (GUI) based on the Eclipse platform. The Message
Brokers Toolkit offers multiple perspectives for message flow development and
runtime management.
Broker Application Development perspective
The Broker Application Development perspective is the default perspective that is
displayed the first time that you start the Message Brokers Toolkit. Application
developers work in this perspective to develop and modify message sets and
message flows. Figure 3-2 on page 27 shows the Broker Application
Development perspective with a message flow open in the Message Flow editor.
Chapter 3. Mediation with WebSphere Message Broker 27
Figure 3-2 Application development perspective
Broker Administration perspective
The Broker Administration perspective is a broker administrative console that
communicates with one or more Configuration Managers. Administrators work in
this perspective to manage the resources (also referred to as
domain objects) in
the broker domain that are defined on one or more Configuration Managers.
Debug perspective
The Debug perspective is where application developers test and debug message
flows.
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