- All Implemented Interfaces:
- AutoCloseable
public class FunctionAssignmentTailer
extends Object
implements AutoCloseable
This class is responsible for reading assignments from the 'assignments' functions internal topic.
Only functions worker leader writes to the topic while other workers read from the topic.
When a worker become a leader, the worker will read to the end of the assignments topic and close its reader to the topic.
Then the worker and new leader will be in charge of computing new assignments when necessary.
The leader does not need to listen to the assignments topic because it can just update its in memory assignments map directly
after it computes a new scheduling. When a worker loses leadership, the worker is start reading from the assignments topic again.