OutHandler

All Known Implementing Classes:

AbstractInOutHandler, AbstractOutHandler, ActorGraphInterpreter.BatchingActorInputBoundary, ByteStringParser.ParsingLogic, DeflateDecompressorBase.DecompressorParsingLogic, GraphStageLogic.ConditionalTerminateOutput, GraphStageLogic.EagerTerminateOutput$, GraphStageLogic.IgnoreTerminateOutput$, MergeHub.MergedSourceLogic
```
public interface OutHandler
```
Called when the output port has received a pull, and therefore ready to emit an element, i.e. {@link GraphStageLogic.push()} is now allowed to be called on this port.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onDownstreamFinish()`	Called when the output port will no longer accept any new elements.
`void`	`onPull()`	Called when the output port has received a pull, and therefore ready to emit an element, i.e.

- Method Detail
  - onDownstreamFinish
```
void onDownstreamFinish()
                 throws java.lang.Exception
```
    Called when the output port will no longer accept any new elements. After this callback no other callbacks will be called for this port.
    
    Throws:
    
    java.lang.Exception
  - onPull
```
void onPull()
     throws java.lang.Exception
```
    Called when the output port has received a pull, and therefore ready to emit an element, i.e. {@link GraphStageLogic.push()} is now allowed to be called on this port.
    
    Throws:
    
    java.lang.Exception