HP Integrity NonStop H-Series - Manual (Page 294)

Figure 14-3 Hibernate Application: Message Flow in a Web Application
A Hibernate message flows through all the components in the following sequence:
1. A Hibernate-specific request is sent to the TCP/IP subsystem through a web browser.
2. The TCP/IP subsystem sends the request to the httpd process of the iTP WebServer. If you
are using conventional TCP/IP, the request is sent to the Distributor process of iTP WebServer.
However, if you are using Parallel TCP/IP Library or TCP/IPv6, the request is sent to the
listener
httpd process.
3. The httpd processes of the iTP WebServer communicate with the NSJSP processes either
using Pathsend calls through TS/MP or directly with an NSJSP process using file system
calls. The first request is always routed to an NSJSP instance through TS/MP using Pathsend
calls. TS/MP determines the least loaded instance of NSJSP and routes the request to it.
Subsequent requests from the web client are either routed to a particular instance of NSJSP
through file system calls or are sent to an instance of NSJSP through TS/MP using Pathsend
calls.
For more information on Pathsend calls, see the HP NonStop TS/MP Pathsend and Server
Programming Manual.
4. The Presentation layer application, which is deployed in NSJSP, passes the request to the
Hibernate layer.
294 Hibernate Overview