io.vertx.core

Interface AsyncResult<T>

All Known Subinterfaces:

CompositeFuture, Future<T>

public interface AsyncResult<T>

Encapsulates the result of an asynchronous operation.

Many operations in Vert.x APIs provide results back by passing an instance of this in a Handler.

The result can either have failed or succeeded.

If it failed then the cause of the failure is available with cause().

If it succeeded then the actual result is available with result()

Author:

Tim Fox

Method Summary

Modifier and Type	Method and Description
Throwable	cause() A Throwable describing failure.
boolean	failed() Did it fail?
T	result() The result of the operation.
boolean	succeeded() Did it succeed?

Method Detail

result

T result()

The result of the operation. This will be null if the operation failed.

Returns:

the result or null if the operation failed.

cause

Throwable cause()

A Throwable describing failure. This will be null if the operation succeeded.

Returns:

the cause or null if the operation succeeded.

succeeded

boolean succeeded()

Did it succeed?

Returns:

true if it succeded or false otherwise

failed

boolean failed()

Did it fail?

Returns:

true if it failed or false otherwise