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## org.apache.axis2.client.async
Class Callback

    java.lang.Object
      org.apache.axis2.client.async.Callback

Deprecated. Please use AxisCallback instead, this class is deprecated as of 1.3

    public abstract class Callback

extends Object

Base class for asynchronous client callback handler. The application code needs to create an instance of this class (actually an instance of a subclass, since this base class cannot be used directly) and pass it to the generated startXXX client stub method when initiating an asynchronous operation. The Axis2 code then calls the appropriate methods of this class `setComplete(boolean)`, and either `onComplete(AsyncResult)` or `onError(Exception)` when the operation is completed.

Constructor Summary
`Callback()` Deprecated.

Method Summary
`boolean` | `isComplete()` Deprecated. Returns true if the asynchronous operation has completed, false otherwise.
`abstract void` | `onComplete(AsyncResult result)` Deprecated. Method is invoked by Axis2 once the asynchronous operation has completed successfully.
`abstract void` | `onError(Exception e)` Deprecated. Method invoked by Axis2 if the asynchronous operation fails.
`void` | `setComplete(boolean complete)` Deprecated. Method invoked by Axis2 to set the completion state of the operation.

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

Constructor Detail

### Callback

    public Callback()

  Deprecated.

Method Detail

### onComplete

    public abstract void onComplete(AsyncResult result)

  Deprecated.
  Method is invoked by Axis2 once the asynchronous operation has completed successfully.

  Parameters:
    `result` -

### onError

    public abstract void onError(Exception e)

  Deprecated.
  Method invoked by Axis2 if the asynchronous operation fails.

  Parameters:
    `e` -

### isComplete

    public boolean isComplete()

  Deprecated.
  Returns true if the asynchronous operation has completed, false otherwise. Typically this is used for polling. e.g. `

                while(!callback.isComplete()){
                   Thread.sleep(1000);
                }
                do whatever u need to do

  `

  Returns:
    boolean

### setComplete

    public final void setComplete(boolean complete)

  Deprecated.
  Method invoked by Axis2 to set the completion state of the operation.

  Parameters:
    `complete` -

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