NotifyOnceListener (elasticsearch-extend 3.2 API)

java.lang.Object
- org.elasticsearch.action.NotifyOnceListener<Response>

All Implemented Interfaces:

ActionListener<Response>

Direct Known Subclasses:

StepListener
```
public abstract class NotifyOnceListener<Response>
extends Object
implements ActionListener<Response>
```
A listener that ensures that only one of onResponse or onFailure is called. And the method the is called is only called once. Subclasses should implement notification logic with innerOnResponse and innerOnFailure.

Constructor Summary

Constructors
Constructor Description

NotifyOnceListener()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`protected abstract void`	`innerOnFailure(Exception e)`
`protected abstract void`	`innerOnResponse(Response response)`
`void`	`onFailure(Exception e)`	A failure caused by an exception at some phase of the task.
`void`	`onResponse(Response response)`	Handle action response.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NotifyOnceListener
```
public NotifyOnceListener()
```
- Method Detail
  - innerOnResponse
```
protected abstract void innerOnResponse(Response response)
```
  - innerOnFailure
```
protected abstract void innerOnFailure(Exception e)
```
  - onResponse
```
public final void onResponse(Response response)
```
    Description copied from interface: ActionListener
    
    Handle action response. This response may constitute a failure or a success but it is up to the listener to make that decision.
    
    Specified by:
    
    onResponse in interface ActionListener<Response>
  - onFailure
```
public final void onFailure(Exception e)
```
    Description copied from interface: ActionListener
    
    A failure caused by an exception at some phase of the task.
    
    Specified by:
    
    onFailure in interface ActionListener<Response>