Java Reference
In-Depth Information
Figure B.17. The constructors in the
MachineComponent
hierarchy support the rules
that a
MachineRoot
object must have a responsible engineer, and every
MachineComponent
object except a root must have a parent.
SOLUTION 12.5
Two examples of when C
HAIN
OF
R
EPONSIBILITY
might apply to objects that do not form
a composite are
•
A chain of on-call engineers that follows a standard rotation. If the primary on-call
engineer does not answer a production support page in a specific amount of time, the
notification system pages the next engineer in the chain.
•
When users enter such information as the date of an event, a chain of parsers can take
turns trying to decode the user's text.
