Class GlobalGrouping
- java.lang.Object
-
- org.apache.storm.trident.partition.GlobalGrouping
-
- All Implemented Interfaces:
Serializable,CustomStreamGrouping
public class GlobalGrouping extends Object implements CustomStreamGrouping
- See Also:
- Serialized Form
-
-
Constructor Summary
Constructors Constructor Description GlobalGrouping()
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description List<Integer>chooseTasks(int i, List<Object> list)This function implements a custom stream grouping.voidprepare(WorkerTopologyContext context, GlobalStreamId stream, List<Integer> targets)Tells the stream grouping at runtime the tasks in the target bolt.
-
-
-
Method Detail
-
prepare
public void prepare(WorkerTopologyContext context, GlobalStreamId stream, List<Integer> targets)
Description copied from interface:CustomStreamGroupingTells the stream grouping at runtime the tasks in the target bolt. This information should be used in chooseTasks to determine the target tasks.It also tells the grouping the metadata on the stream this grouping will be used on.
- Specified by:
preparein interfaceCustomStreamGrouping
-
chooseTasks
public List<Integer> chooseTasks(int i, List<Object> list)
Description copied from interface:CustomStreamGroupingThis function implements a custom stream grouping. It takes in as input the number of tasks in the target bolt in prepare and returns the tasks to send the tuples to.- Specified by:
chooseTasksin interfaceCustomStreamGroupinglist- the values to group on
-
-