Package org.apache.storm.daemon
Class GrouperFactory.BasicLoadAwareCustomStreamGrouping
- java.lang.Object
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- org.apache.storm.daemon.GrouperFactory.BasicLoadAwareCustomStreamGrouping
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- All Implemented Interfaces:
Serializable,CustomStreamGrouping,LoadAwareCustomStreamGrouping
- Enclosing class:
- GrouperFactory
public static class GrouperFactory.BasicLoadAwareCustomStreamGrouping extends Object implements LoadAwareCustomStreamGrouping
A bridge between CustomStreamGrouping and LoadAwareCustomStreamGrouping.- See Also:
- Serialized Form
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Constructor Summary
Constructors Constructor Description BasicLoadAwareCustomStreamGrouping(CustomStreamGrouping customStreamGrouping)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description List<Integer>chooseTasks(int taskId, List<Object> values)This function implements a custom stream grouping.voidprepare(WorkerTopologyContext context, GlobalStreamId stream, List<Integer> targetTasks)Tells the stream grouping at runtime the tasks in the target bolt.voidrefreshLoad(LoadMapping loadMapping)
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Constructor Detail
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BasicLoadAwareCustomStreamGrouping
public BasicLoadAwareCustomStreamGrouping(CustomStreamGrouping customStreamGrouping)
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Method Detail
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refreshLoad
public void refreshLoad(LoadMapping loadMapping)
- Specified by:
refreshLoadin interfaceLoadAwareCustomStreamGrouping
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prepare
public void prepare(WorkerTopologyContext context, GlobalStreamId stream, List<Integer> targetTasks)
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
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chooseTasks
public List<Integer> chooseTasks(int taskId, List<Object> values)
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 interfaceCustomStreamGroupingvalues- the values to group on
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