CICS Transaction Gateway V5 The WebSphere ... - IBM Redbooks

CTGTesterCCI
The CTGTesterCCI enterprise application calls a CICS program using the CICS
ECI resource adapter and displays the result. Figure 10-4 illustrates the complete
architecture of the enterprise application.
Web browser
HTML
JSP
WebSphere
Application Server
Web container
EJB container
session bean
CTGTesterCCI
servlet
CTGTesterCCIServlet
CICS ECI
resource
adapter
Figure 10-4 Application architecture of CTGTesterCCI, local mode
CCI
CICS TG
z/OS
CICS TS V2.2
EC01
(COBOL
program)
The flow of control through the enterprise application is as follows:
► The JSP page index.jsp contains an HTML form that starts the servlet
CTGTesterCCIServlet. Several parameters are sent to the servlet, including
the name of the CICS program to call, the COMMAREA input and length, and
the encoding to use.
► The servlet passes these parameters on to the session bean, CTGTesterCCI.
► The session bean makes the ECI call to CICS using the CICS ECI resource
adapter, and returns the response back to the servlet.
► The servlet forwards the results to one of two JSPs, depending on whether
the request was successful or not.
► The JSP formats and displays the results of the request.
The servlet also allows use of an unmanaged connection, in which case several
additional parameters, such as CICS server and user details, may be specified,
since these are normally defined in the managed connection factory.
This sample enterprise application is provided in the file CTGTesterCCI.ear. To
obtain this file, see Appendix C, “Additional material” on page 389.
Chapter 10. CICS TG and WebSphere Application Server for z/OS 243
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