helloRPC implements a simple channelRPC service.
On linux in the helloRPC directory enter:
bin/$EPICS_HOST_ARCH/helloService
There is also a scripts/helloService.bat file for windows.
On linux in the helloRPC directory the following are examples of running the client
bin/$EPICS_HOST_ARCH//helloClient Hello anonymous mrk> scripts/helloClient Me Hello Me mrk>
This is a starting point for writing an RPC service without using pvDatabaseJava.
But note that example database has a similar example implemented via pvDatabaseCPP, which allows clients to monitor the result of each request.