Package io.siddhi.core.stream.output.sink

Class PartitionedGroupDeterminer

java.lang.Object

io.siddhi.core.stream.output.sink.PartitionedGroupDeterminer

All Implemented Interfaces:

OutputGroupDeterminer

public class PartitionedGroupDeterminer
extends Object
implements OutputGroupDeterminer

This implementation of OutputGroupDeterminer groups events into 'n' number of partitions. The events will be divided into predefined number partitions based on the value of a given field in the event. Events which are having the same value for the partitioning field will belong the to the same partition.

Constructor Summary

Constructors

Constructor	Description
PartitionedGroupDeterminer(int partitionFieldIndex, int partitionCount)

Method Summary

Modifier and Type	Method	Description
String	decideGroup(Event event)	Deciding the group of a given event and returning a unique identifier to identify a group.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PartitionedGroupDeterminer

public PartitionedGroupDeterminer(int partitionFieldIndex,
                                  int partitionCount)

Method Detail

decideGroup

public String decideGroup(Event event)

Deciding the group of a given event and returning a unique identifier to identify a group. A correct implementation of this method should be returning the same group identifier for all events belongs a single group.

Specified by:

decideGroup in interface OutputGroupDeterminer

Parameters:

event - Event that needs to be decided to which group it belongs to

Returns:

Unique Identifier to identify the group of the event