About Registration
About Aliases
An alias is a reference to a process definition registered with an engine. It is used by developers when defining a Subprocess activity in a process definition so they do not have to hard code the process name and host engine represented by the Subprocess activity. Aliases provide the flexibility to move subprocess execution to different engines at runtime.
An alias is a logical name that is evaluated by the engine during process execution. It references a particular process definition executed by a particular engine. An alias must be registered with every engine executing a process definition containing the alias (that is, containing a Subprocess activity referencing the alias).
For example, suppose engine1 is executing a process1 that includes a Subprocess activity1, as shown in Figure
Figure 5-2 Subprocess Activity References
Engine 1
Process 1
Subprocess activity 1
Engine 2
Subprocess activity 2
Engine 3
Process 3
Process 2
The Subprocess activity1 is actually a process3 that executes on engine 3. Suppose also that engine2 is executing a process2 that includes a Subprocess activity2. The Subprocess activity2 is also process3, which executes on engine3.
Chapter 5 Managing Registrations 143
