The preprocessor initialization parameters as provided during
registration of the preprocessor. Additional parameters like the Http
Service Runtime attributes are not included. If the preprocessor has not
initialization parameters, this map is empty.
public long serviceId
Service property identifying the preprocessor. In the case of a
preprocessor registered in the service registry and picked up by a Http
Whiteboard Implementation, this value is not negative and corresponds to
the service id in the registry. If the preprocessor has not been
registered in the service registry, the value is negative and a unique
negative value is generated by the Http Service Runtime in this case.