Types of Rethrown Exceptions
The type of exception that is rethrown by a runnable might not match the original exception class that was thrown or caught.
If the exception is based on the RWTHRxmsg class, then the exception rethrown by raise() is of the same class as the one captured. Exceptions based on the RWxmsg (or xmsg) class are rethrown as an RWxmsg with the same message value as the captured exception. Any other type of exception is rethrown as an RWTHRxmsg with a generic message stating that the captured exception was of an unrecognized type.When designing code that you expect to execute inside a Threading package runnable, you might want to use the RWTHRxmsg class as a base class for your exceptions. An exception derived from this class can be caught as an RWTHRxmsg, copied for storage using a virtual clone() function, and later “reconstituted” using a virtual raise() function defined by the class. This store-and-forward capability allows a runnable to capture and rethrow an exception.
The Threading package includes a template called RWTTHRCompatibleException, which can convert an existing exception class into an RWTHRxmsg-compatible exception.
