Attention: This topic contains Product-sensitive Programming Interface
and Associated Guidance Information.
Figure 1 shows how CICS® Web
support processes a terminal-oriented transaction.
Figure 1. How CICS Web
support interacts with a 3270 application program
The steps shown in the figure are:
- Optionally, a converter program constructs the input that is passed
to program DFHWBTTA.
- DFHWBTTA attaches the user's transaction, specifying DFHWBLT as
the bridge exit program, and waits for a response from DFHWBLT. The
user's transaction executes in a 3270 bridge environment.
- The bridge exit sets up a 3270 environment for the user's application
program.
- The application program processes the input, and constructs the
3270 output.
- The bridge exit interprets the 3270 output, and passes the HTTP
response to DFHWBTTA.
- Optionally, a converter program modifies the output that is passed
to the Web client.
Note: When you use CICS Web support with 3270 applications,
the application program executes under its own transaction, and not
under the alias transaction.
For more information about the 3270 bridge, see the CICS External
Interfaces Guide.