The steps in the figure are as follows:
·
A Java class request is received from the servlet.
·
The JSH needs to know which Tuxedo service
corresponds to the Java class, so it enqueues a request for the JREPSVR.
·
JREPSVR picks up the request from the JSH.
·
JREPSVR looks up the Java class in the JREPOSITORY
database (a flat file) to find the Tuxedo service that maps to the Java class.
·
JREPSVR returns the Tuxedo service
name to the JSH via the queue JSHQ.
·
The JSH interrogates the BB to
determine which queue the request should be placed on.
·
From this point, the transaction is
the same as the three-tier transaction. The Tuxedo service request is sent to
the appropriate server, and the response is transmitted back via the same JSH
to the servlet.
