com.facebook.litho.annotations

Annotation Type OnError

@Retention(value=CLASS)
public @interface OnError

Annotate a method inside your component with @OnError to receive a callback when an exception inside supported delegate methods of a child component happens. You then get a chance to either trigger a state update or reraise the exception using ComponentUtils.raise .

The method will receive a ComponentContext, and an Exception.

An example use may look like this:

 
  @OnError
  static Component onError(
      ComponentContext c,
      Exception e,
      @Prop SomeProp prop) {
    MyComponent.updateErrorAsync(c, String.format("Error for %s: %s", prop, e.getMessage()));
  }