AsyncResultsetCallback (arcadedb-engine 22.1.2 API)

All Known Implementing Classes:

AbstractAsyncResultsetCallback
```
public interface AsyncResultsetCallback
```
Callback interface for asynchronous commands. If the command returns an exception, the onError(Exception) method is invoked. Otherwise onStart(ResultSet) is called at first. The user can fetch the Resultset in this method. After the return from onStart(ResultSet), the result set is fetched and foreach result the method onNext(Result) is invoked by passing the current Result object. When the fetching of the result set is complete, the onComplete() method is called.
It's suggested to extend the @AbstractAsyncResultsetCallback abstract class and implement onStart(ResultSet) to fetch the result set all in one call, otherwise implement onNext(com.arcadedb.query.sql.executor.Result) method to be invoked foreach record in the result set. In case both onStart(ResultSet) and onNext(Result) are implemented, whatever is remained left from fetching in the result set is invoked in multiple onNext(Result) calls.

Author:

Luca Garulli ([email protected])

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onComplete()`	Invoked when the fetching of the entire result set has been completed.
`void`	`onError(Exception exception)`	Invoked in case of an error in the execution or fetching of the result set.
`boolean`	`onNext(Result result)`	Invoked per single result in the result set.
`void`	`onStart(ResultSet resultset)`	Invoked as soon as the command has been executed.

- Method Detail
  - onStart
```
void onStart(ResultSet resultset)
```
    Invoked as soon as the command has been executed.
    
    Parameters:
    
    resultset - result set to fetch
  - onNext
```
boolean onNext(Result result)
```
    Invoked per single result in the result set.
    
    Returns:
    
    true to continue fetching otherwise false. If false is returned, the fetching stops and the onComplete() method is never invoked.
  - onComplete
```
void onComplete()
```
    Invoked when the fetching of the entire result set has been completed.
  - onError
```
void onError(Exception exception)
```
    Invoked in case of an error in the execution or fetching of the result set.
    
    Parameters:
    
    exception - The exception caught