luwControl in callLink element

The luwControl property of the callLink element of the linkage options part specifies whether the calling program or the called program controls the unit of work. The luwControl property affects the generation of the calling program. This property is applicable only in the following situation:
Select one of the following values:
CLIENT
Specifies that the unit of work is under the caller's control. Updates by the called program are not committed or rolled back until the caller requests commit or rollback. If the called program issues a commit or rollback, a runtime error occurs.

CLIENT is the default value, unless a caller-controlled unit of work is not supported on the platform where the called program resides.

CLIENT is available in these cases:
  • The called program is on CICS®; or
  • The caller is a Java™ program or wrapper that communicates with an iSeries-based COBOL program by way of the IBM® Toolbox for Java. In this case, the value of remoteComType for the call is JAVA400 or JAVA400J2C.
SERVER
Specifies that a unit of work started by the called program is independent of any unit of work controlled by the calling program. In the called program, these rules apply:
  • The first change to a recoverable resource begins a unit of work.
  • Use of the sysLib.commit and sysLib.rollback system functions are valid.

On a call from EGL-generated Java code to a VisualAge® Generator COBOL program or an EGL-generated COBOL program, a commit (or rollback on abnormal termination) is issued automatically when the called program returns. That command affects only the changes that were made by the called program.

When the type property is ejbCall, the runtime behavior is as described for SERVER.

For information about system functions, see the EGL Language Reference.

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