Iprocess engine architecture: (Process Sentinels)

The iprocess engine can be split in to four major areas as shown below.

1. Process Sentinels.
2. Foreground.
3. Mbox set.
4. Background.

Process Sentinels:

• The Process Sentinels are responsible for controlling all the TIBCO iProcess Engine processes.
• Start processes during a Server start up or upon a system administrator request. It will control the order in which the processes are started. 
• Detect failed processes and restart them automatically. Shut down the processes when the system is shutdown or upon a system administrator request to stop the system 
• Monitor other Process Sentinels and restart them if they fail. Maintain the list of all active user logins.

Processes that are controlled by the Process Sentinels are listed below: 

                      1. Background (BG) 

                      2. Database Queue Daemon(DBQD) 

                      3. Deadline Manager(DLMGR) 

                      4. Introspection Activity Publication JMS (IAPJMS) 

                      5. Prediction (BGPREDICT) 

                      6. RPC Background  

                      7. RPC Pool Server(RPC_POOL) 

                      8. iProcess Objects Server 

                      9. WIS MBOX Daemon (WISMBD) 

                      10. Work Item Server (WIS) 

                      11. Work Queue Server (WQS)

For detailed information on these foreground processes CLICK HERE