Delegated call made by the DataAggregatorManager's addDataAggregation
method to allow an underlying DataAggregationSource to establish an
implementation specific data aggregation relationship with a target
grid service.
Service delegation component which aggregates and "caches" service data
from other services into the local service data container using notification
sinks.
Delivers a message with the assumption that the message data will be
aggregated as its native type and into whatever data storage format is
used by the underlying DataAggregationSink class.
Called after the aggregator manager has initialized itself, to give the
DataAggregationSink a chance to initialize any necessary state from the
context of the GridServiceBase parameter.