public interface PostLoad implements AnnotationIdentifies a callback method to be invoked after an Entity of any of the specified kinds
is loaded from the datastore. This can happen as the result of a get() operation or a query. If
#kinds() is not provided the callback will execute for all kinds. Methods with this
annotation must return void, must accept a single argument of type PostLoadContext, must not throw any checked exceptions, must not be static, and must belong to a
class with a no-arg constructor. Neither the method nor the no-arg constructor of the class to
which it belongs are required to be public. Methods with this annotation are free to throw any
unchecked exception they like. Throwing an unchecked exception will prevent callbacks that have
not yet been executed from running, and the exception will propagate to the code that invoked the
datastore operation that resulted in the invocation of the callback. Throwing an unchecked
exception from a callback will not have any impact on the result of the datastore
operation. Methods with this annotation will not be invoked if the datastore operation fails.
Implements
AnnotationMethods
kinds()
public abstract String[] kinds()The kinds to which this callback applies. The default value is an empty array, which indicates that the callback should run for all kinds.
| Returns | |
|---|---|
| Type | Description |
String[] |
The kinds to which this callback applies. |