November 2018
Beginner to intermediate
260 pages
6h 12m
English
Content preview from Apache Ignite Quick Start Guide
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Task Sessions
Ignite provides an API to define a distributed session that exists for a particular task's execution; this distributed session is shared between the jobs and parent task.
The ComputeTaskSession interface defines a set of methods to perform the following distributed session tasks:
- setAttribute: A job (or the parent task) can set a session attribute; all other jobs within this task and task itself can see the attribute. This method takes a key (possible job id) and a value.
- getAttribute: Retrieves the session attribute value for a key.
- waitForAttribute: A job can call this method by passing a key and an expected value. The call is a blocking call, if this attribute is already in session, returns immediately, otherwise waits for ...
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