Simple SourceDescriptor implementation that can stores
properties over JDBC.
The descriptor is to be configured with the name of a datasource that
contains a table with the following scheme:
CREATE TABLE SOURCEPROPS(
SOURCE VARCHAR NOT NULL,
NAMESPACE VARCHAR NOT NULL,
NAME VARCHAR NOT NULL,
VALUE VARCHAR NOT NULL,
CONSTRAINT SYS_CT_11 UNIQUE(SOURCE,NAMESPACE,NAME))
The implementation will attempt to connect to the EventAware cache in
order to notify it during changes.