SingleOnSubscribe (RxJava Javadoc 2.2.21)

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io.reactivex

Interface SingleOnSubscribe<T>

Type Parameters:

T - the value type pushed
```
public interface SingleOnSubscribe<T>
```
A functional interface that has a subscribe() method that receives an instance of a SingleEmitter instance that allows pushing an event in a cancellation-safe manner.

- Method Summary
  
  All Methods
  Modifier and Type Method and Description
  
  void subscribe (SingleEmitter<T> emitter)
  Called for each SingleObserver that subscribes.

- Method Detail
  - subscribe
```
void subscribe(@NonNull
 SingleEmitter<T> emitter)
 throws Exception 
```
    Called for each SingleObserver that subscribes.
    
    Parameters:
    
    emitter - the safe emitter instance, never null
    
    Throws:
    
    Exception - on error

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