PartitionSelectorStrategy (spring-cloud-stream 3.2.10 API)

```
public interface PartitionSelectorStrategy
```
Strategy for determining the partition to which a message should be sent.

Author:

Gary Russell

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`selectPartition(Object key, int partitionCount)`	Determine the partition based on a key.

- Method Detail
  - selectPartition
```
int selectPartition(Object key,
                    int partitionCount)
```
    Determine the partition based on a key. The partitionCount is 1 greater than the maximum value of a valid partition. Typical implementations will return someValue % partitionCount. The caller will apply that same modulo operation (as well as enforcing absolute value) if the value exceeds partitionCount - 1.
    
    Parameters:
    
    key - the key
    
    partitionCount - the number of partitions
    
    Returns:
    
    the partition