@Retention(value=RUNTIME)
public @interface ReactMethod
This applies to derived classes of BaseJavaModule, which will generate a list of
exported methods by searching for those which are annotated with this annotation and adding a JS
callback for each.
| Modifier and Type | Optional Element and Description |
|---|---|
boolean |
isBlockingSynchronousMethod
Whether the method can be called from JS synchronously **on the JS thread**, possibly returning
a result.
|
public abstract boolean isBlockingSynchronousMethod
WARNING: in the vast majority of cases, you should leave this to false which allows your native module methods to be called asynchronously: calling methods synchronously can have strong performance penalties and introduce threading-related bugs to your native modules.
In order to support remote debugging, both the method args and return type must be
serializable to JSON: this means that we only support the same args as ReactMethod, and
the hook can only be void or return JSON values (e.g. bool, number, String, WritableMap, or WritableArray). Calling these methods when running under the websocket
executor is currently not supported.