Customizing the configuration transaction (EZAC)

There is a CICS® object for each CICS that uses the TCP/IP socket interface and is controlled by the configuration file. The CICS object is identified by the APPLID of the CICS it references.

There is a listener object for each listener defined for a CICS. It is possible that a CICS does not have a listener, but this is not common practice. A CICS can have multiple listeners that are either multiple instances of the supplied listener with different specifications, multiple user-written listeners, or some combination.

The EZAC transaction is a panel-driven interface that lets you add, delete, or modify the configuration file. Table 1 lists and describes the functions supported by the EZAC transaction.

Modifying data sets: You can use the EZAC transaction to modify the configuration data set while CICS is running.

Table 1. Functions supported by the EZAC transaction
Command	Object	Function
ALTER	CICS/listener	Modifies the attributes of an existing resource definition
CONVERT	Listener	Converts listener from the standard listener that requires the standard header to the enhanced listener that does not require the header.
COPY	CICS/listener	CICS - Copies the CICS object and its associated listeners to create another CICS object. COPY fails if the new CICS object already exists. Listener - Copies the listener object to create another listener object. COPY fails if the new listener object already exists.
DEFINE	CICS/listener	Creates a new resource definition
DELETE	CICS/listener	CICS - Deletes the CICS object and all of its associated listeners. Listener - Deletes the listener object.
DISPLAY	CICS/listener	Shows the parameters specified for the CICS/listener object.
RENAME	CICS/listener	Performs a COPY followed by a DELETE of the original object.

If you enter EZAC, the following screen is displayed:

Figure 1. EZAC initial screen

 EZAC,                                                        APPLID = ........ 
                                                                                
 Enter One of the Following                                                     
                                                                                
 ALTer                                                                          
 CONvert                                                                        
 COPy                                                                           
 DEFine                                                                         
 DELete                                                                         
 DISplay                                                                        
 REName                                                                         
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
 PF 3 END                                                           12 CNCL