Is there any method via JCL we can code the same functionality
Yes - you can do almost anything via JCL - all you need are the programs and control data for those programs. But JCL will not do it for you direcgtly as it only telss the OS what programs you want run and what resources those programs require.
The EQQ messages come from OPC/TWS. Speak to your OPC/TWS people as to how to take advantage of them.
The problem I have is that people can explain things quickly but I can only comprehend slowly.