| Interface | Description | 
|---|---|
| CustomStreamGrouping | |
| LoadAwareCustomStreamGrouping | 
| Class | Description | 
|---|---|
| Load | Represents the load that a Bolt is currently under to help in deciding where to route a tuple, to help balance the load. | 
| LoadAwareShuffleGrouping | |
| LoadMapping | Holds a list of the current loads | 
| PartialKeyGrouping | |
| ShuffleGrouping | 
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