CallbackContribution (Apache HttpComponents Core HTTP/1.1 5.1 API)

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java.lang.Object
- org.apache.hc.core5.concurrent.CallbackContribution<T>

Type Parameters:
T - the future result type of an asynchronous operation.

All Implemented Interfaces:

FutureCallback<T>
```
public abstract class CallbackContribution<T>
extends Object
implements FutureCallback<T>
```
Convenience base class for FutureCallbacks that contribute a result of the operation to another FutureCallback.

Since:

5.1

- Constructor Summary
  
  Constructors
  Constructor and Description
  
  CallbackContribution(FutureCallback<?> callback)
- Method Summary
  
  Methods
  Modifier and Type Method and Description
  
  void cancelled()
  
  void failed(Exception ex)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  - Methods inherited from interface org.apache.hc.core5.concurrent.FutureCallback
    completed

- Constructor Detail
  - CallbackContribution
```
public CallbackContribution(FutureCallback<?> callback)
```
- Method Detail
  - failed
```
public final void failed(Exception ex)
```
    Specified by:
    
    failed in interface FutureCallback<T>
  - cancelled
```
public final void cancelled()
```
    Specified by:
    
    cancelled in interface FutureCallback<T>

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