Interface Summary |
Chain |
A Chain represents a configured list of
Command s that will be executed in order to perform processing
on a specified Context . |
Command |
A Command encapsulates a unit of processing work to be
performed, whose purpose is to examine and/or modify the state of a
transaction that is represented by a Context . |
Context |
A Context represents the state information that is
accessed and manipulated by the execution of a Command or a
Chain . |
Filter |
A Filter is a specialized Command that also expects
the Chain that is executing it to call the
postprocess() method if it called the execute()
method. |