Bread::Board::LifeCycle::Singleton::WithParameters - singleton lifecycle role
for a parameterized service
Sub-role of Bread::Board::LifeCycle, this role defines the "singleton"
lifecycle for a parameterized service. The "get" method will only do
its work the first time it is invoked for each set of parameters; subsequent
invocations with the same parameters will return the same object.
Hashref mapping keys to objects, used to cache the results of "get"
Generates a key using "generate_instance_key" (passing it all the
arguments); if the "instances" attribute does not hold an object for
that key, it will build it (by calling the underlying "get" method)
and store it in "instances". The object (either retrieved from
"instances" or freshly built) will be returned.
Generates a (hopefully) unique key from the given arguments (usually, whatever
was passed to "get"). The current implementation stringifies all
arguments, so different references to identical values will be considered
Stevan Little <firstname.lastname@example.org>
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