GT.M provides the JNLACTIVE, JNLFILE, REGION and JNLTRANSACTION keywords as arguments to the $VIEW function. Normal operation does not require $VIEW() to examine journaling status. However, under certain circumstances, such as during debugging of logical transaction design and implementation, $VIEW() may provide a useful tool.

$VIEW("JNLACTIVE", region) returns a zero (0) indicating journaling is disabled for the region, one (1) indicating journaling is enabled but OFF, or two (2) indicating journaling is enabled and ON for the named region.

$VIEW("JNLFILE", region) returns the journal file name. If no journal filename has been established it returns a null string. Otherwise it is a fully translated filename.

$VIEW("REGION", expr) where expr evaluates to a gvn, returns the name of the region associated with the named gvn. This parameter may be used in conjuction with the above two parameters (JNLACTIVE & JNLFILE), to get journaling status in a configuration-independent manner.

$VIEW("JNLTRANSACTION") returns the difference between the number of ZTSTARTs that have been issued and the number of ZTCOMMITs. If no fenced transaction is in progress, then a zero (0) is returned. This serves an analogous function to $TLEVEL for transactions that use TSTART and TCOMMIT.

For more information on $VIEW(), refer to the "Functions" chapter in the GT.M Programmer's Guide.