Separate CICS Business Application Transactions and CICS Default Communication Transactions

Separate Default and Application Level Transaction

This is kind of good practice to always separate Default CICS Transaction from the application level of Transaction.

Once the TCPIP connections are established between Web Services and CICS; 

 - All the CICS services runs under CIEP transaction as its defined and linked to the TCP IP service and port/host of the Web Services

- All the services running under default is copied to the mirror transaction as its defined as communication parameter for Web Services

- Also when messages are serviced from the Web Services, generally CICS receives program which needs to be invoked and that application level program runs under default transaction 

- In these cases, if any application level service is invoked it runs under default transaction CIEP which creates problem if any user needs to debug

The Flow is 

What is ECI?

External Call Interface 

ECI calls are the way of communication between CICS and Web Services which uses TCP IP connections.

Client Side or Web Service need not use BMI setups to connect to CICS online transactions.

ECI calls are set up and linked the CICS default transaction. And on the client side or Web Service side can be set up in a way where it can run on mirror transactions

Read Blog for more reference  : TCPIP CONNECTION BETWEEN CICS AND WEB SERVICES

Establishing TCP IP service between Web Services and CICS via CIEP Default transactions

                    TCPIP Connection between CICS and Web Services

If you have any Java front end connected to CICS via Web Services following parameters needs to be taken care of:

Currently, I have tested with the Web Services using WSDL objects. There are Web services use the standard web protocols HTTP, XML, SOAP, WSDL, and UDDI. WSDL (Web Services Description Language) is an XML-based language used to define web services and to describe how to access them. 

- Connection between CICS and Web Method Serivces via TCP IP protocols

- Define TCP IP Service and link it to the port number

Command in CICS