This section the event processing APIs and how to configure them on top of the space. The relevant APIs include the Notify Container, which wraps the Space Where GigaSpaces data is stored. It is the logical cache that holds data objects in memory and might also hold them in layered in tiering. Data is hosted from multiple SoRs, consolidated as a unified data model. data event session API with event container abstraction, and the Polling Container, which allows you to perform polling receive operations against the Space.
The Event Listener Container is an interface that represents an abstraction for subscribing to, and receiving events over a Space proxy.
Regarding FIFO Ordering, GigaSpaces supports both non-ordered Entries and FIFO FIFO is an acronym for first in, first out, a method for organizing the manipulation of a data structure where the oldest entry, or "head" of the queue, is processed first. ordered Entries when performing space operations.