public final class FutureHelperUtilities for working with Futures in the synchronous datastore api.
Static Methods
<T,E>quietGet(Future<T> future, Class<E> exceptionClass)
public static T <T,E>quietGet(Future<T> future, Class<E> exceptionClass)Return the result of the provided Future, converting all checked exceptions except
those of the provided type to unchecked exceptions so the caller doesn't have to handle them.
If an ExecutionException is thrown and the type of the cause does
not equal exceptionClass the cause is wrapped in a RuntimeException. If the
type of the cause does equal exceptionClass the cause itself is thrown. If an InterruptedException is thrown it is wrapped in a DatastoreFailureException.
| Parameters | |
|---|---|
| Name | Description |
future |
Future<T>The Future whose result we want to return. |
exceptionClass |
Class<E>Exceptions of this type will be rethrown. |
| Returns | |
|---|---|
| Type | Description |
T |
The result of the provided Future. |
| Exceptions | |
|---|---|
| Type | Description |
E |
Thrown If an ExecutionException with a cause of the appropriate type is caught. |
<T>quietGet(Future<T> future)
public static T <T>quietGet(Future<T> future)Return the result of the provided Future, converting all checked exceptions to unchecked exceptions so the caller doesn't have to handle them. If an ExecutionException is thrown the cause is wrapped in a RuntimeException. If an InterruptedException is thrown it is wrapped in a DatastoreFailureException.
| Parameter | |
|---|---|
| Name | Description |
future |
Future<T>The Future whose result we want to return. |
| Returns | |
|---|---|
| Type | Description |
T |
The result of the provided Future. |
Constructors
FutureHelper()
public FutureHelper()