The base application, with its 3270 user interface, provides
functions with which you can list the contents of a stored catalog,
select an item from the list, and enter a quantity to order. The
application
has a modular design, which makes it simple to extend the application
to support newer technology, such as web services.
Figure 1
shows the structure of the base application.
Figure 1. Structure of the base application
The components of the base application are:
A BMS presentation manager (DFH0XGUI) that supports a 3270
terminal or emulator, and that
interacts with the main catalog manager program.
A catalog manager program (DFH0XCMN) that is the core of the
example application, and that
interacts with several back-end components:
A data handler program that provides the interface between
the catalog manager program and the
data store. The base application provides two versions of this
program. They are the VSAM data
handler program (DFH0XVDS), which stores data in a VSAM data set; and a
dummy data handler
(DFH0XSDS), which does not store data, but returns valid responses to its
caller. Configuration
options let you choose between the two programs.
A dispatch manager program that provides an interface for dispatching an order to a
customer. Again, configuration options let you choose between the two versions of this program:
DFHX0WOD is a web service requester that invokes a remote order dispatch end point, and DFH0XSOD is
a dummy program that returns valid responses to its caller.
There are two equivalent order
dispatch endpoints: DFH0XODE is a CICS service provider program;
ExampleAppDispatchOrderV855.war is a Java web archive file that can be deployed in
CICS Liberty JVM server or similar environments.
A dummy stock manager program (DFH0XSSM) that returns valid
responses to its caller, but takes
no other action.
