CTX
- The context type to use, can by any Component
, service
or POJO.RET
- The return type of the Command
's proceedings.E
- The exception type of the Command
's erroneous termination.public interface Command<CTX,RET,E extends Exception>
Command
(Command
) represents an (atomic) operation applied
to a context encapsulated in an object (as of object oriented programming).
Usually a Command
also provides means to undo its operation applied
before. The Command
is created by a client (e.g. the business logic)
and passed to the Command
-bus for execution.Modifier and Type | Method and Description |
---|---|
RET |
execute(CTX aContext)
The invoker executes a
Command by providing it a context (being a
service, a Component or a POJO). |
RET execute(CTX aContext) throws E extends Exception
Command
by providing it a context (being a
service, a Component
or a POJO). The method works synchronously
and waits (blocks the caller#s thread) till a result is available.aContext
- The target object (being a service, a Component
or a POJO) which is used by the Command
to perform its
(atomic) operation.Command
after execution or Void in
case this Command
does not process a result.Exception
- in case something went wrong.Copyright © 2016. All rights reserved.