Sun Microsystems iPlanet Integration Server 3.0, Руководство по системе управления

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iIS Process System Components
Chapter 2 Setting Up an iIS Process Management System 45
The iPlanet UDS installation program creates an iPlanet UDS directory structure
and source files on your target node, sets a number of environment variables used
by iPlanet UDS at startup time, and creates startup scripts for starting the
appropriate system management service—the Environment Manager or Node
Manager—for your target node.
Setting up an iIS process system, in turn, depends upon the iPlanet UDS system
management services provided in an iPlanet UDS environment.
iIS Process System Components
An iIS process system consists of both development and runtime components, as
illustrated in
Figure 2-1 , and described in the iIS Process Development Guide.
The system includes one or more iIS process engines, which are accessed by a
number of iIS process client applications. An engine controls and manages the flow
of business processes, coordinating the work of the different client applications
that perform the activities that make up these processes. The client applications
perform activities directly or by invoking other application services in a distributed
application.
An iIS process engine executes process definitions created by developers using a
set of graphically-based process development workshops. These workshops store
information in a central development repository. When development of a process
definition is complete, the process definition is dynamically registered with an
engine, which can then execute the process on behalf of a number of applications.
These applications can be client applications that directly call the engine, or
applications that are integrated using the iIS backbone.