Partitioner (Spring Batch 4.1.4.RELEASE API)

All Known Implementing Classes:
BasicPartitioner, ColumnRangePartitioner, MultiResourcePartitioner, SimplePartitioner
```
public interface Partitioner
```
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

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.util.Map<java.lang.String,ExecutionContext>`	`partition(int gridSize)`	Create a set of distinct `ExecutionContext` instances together with a unique identifier for each one.

- Method Detail
  - partition
```
java.util.Map<java.lang.String,ExecutionContext> partition(int gridSize)
```
    Create a set of distinct ExecutionContext 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