Interface Partitioner
- All Known Implementing Classes:
MultiResourcePartitioner
,SimplePartitioner
- Functional Interface:
- This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
Central strategy interface for creating input parameters for a partitioned step in the
form of
ExecutionContext
instances. The usual aim is to create a set of
distinct input values, e.g. a set of non-overlapping primary key ranges, or a set of
unique filenames.- Since:
- 2.0
- Author:
- Dave Syer, Taeik Lim
-
Method Summary
Modifier and TypeMethodDescriptionpartition
(int gridSize) Create a set of distinctExecutionContext
instances together with a unique identifier for each one.
-
Method Details
-
partition
Create a set of distinctExecutionContext
instances together with a unique identifier for each one. The identifiers should be short, mnemonic values, and only have to be unique within the return value (e.g. use an incrementer).- Parameters:
gridSize
- the size of the map to return- Returns:
- a map from identifier to input parameters
-