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24.9. Handling Exceptions
When invoking a remote component method, you can specify an exception handler to process the response in the event of an exception during component invocation. To specify an exception handler function, include a reference to it after the callback parameter in your JavaScript:
If you do not have a callback handler defined, you must specify
null
in its place:
The exception object that is passed to the exception handler exposes one method,
getMessage()
, which returns the exception message belonging to the exception thrown by the @WebRemote
method.