Base class for simple Ensemble message classes, and for the sub- base classes Ens.Request and Ens.Response. Note however that any persistent or serial object can be sent as a message body. It is not required that all message body object classes to be derived from this class. Also note that all message classes derived from this class will share the same storage extent in the database.
Override DOMAIN inherited from %CSP.Util.AutoForm parameter EXTENTSIZE = 2000000;
The EXTENTSIZE parameter is used to inform the Caché SQL Query Optimizer of the approximate number of instances in the extent containing instances of this class. parameter XMLIGNORENULL = 1;
For example, a class that expects to have about 1,000,000 instances should define:parameter EXTENTSIZE = 1000000;
XMLIGNORENULL allows the programmer to override the default XML handling of empty strings for properties of type %String. By default (XMLIGNORENULL = 0), empty strings in the XML input are stored as $c(0) and $c(0) is written to XML as an empty tag. A missing tag in the XML input is always stored as "" and "" is always output to XML as no tag. parameter XMLINCLUDEINGROUP = 0;
If XMLIGNORENULL is set = 1, then both missing tags in the XML and empty strings are input as "", and both "" and $c(0) are output as empty tags (i.e. <tag></tag>).
If XMLIGNORENULL is set = "inputonly", then both missing tags in the XML and empty strings are input as "". Output of "" and $c(0) are for XMLIGNORENULL = 0: $c(0) is output as an empty tag (i.e. <tag></tag>) and "" is output as no tag.
If XMLIGNORENULL = "runtime" (runtime is not case sensitive), then the behavior of XMLIGNORENULL is determined by the format parameter of XMLExport, XMLImport and %XML.Reader.OpenFile. The default behavior for XMLIGNORENULL="runtime is the same as XMLIGNORENULL=0. Adding "ignorenull" to the format argument changes the behavior to that of XMLIGNORENULL=1. "ignorenull" shoud be separated by a comma from literal/encoded part of the format. Example values for format are "", ",ignorenull", "literal,ignorenull" and "encoded,ignorenull". Note that "inputonly" is equivalent to using ,ignorenull for XMLExport and not for %XML.Reader.
Prevent the XML Type and Name of classes derived from this class from interfering with one another if they have the same short classname. parameter XMLTYPE = "Ens_Messagebody";
Prevent this class from having the same default XML Type and Name as any of its subclasses that have the short classname.