Universal Messaging Developer Guide : Enterprise APIs : Enterprise Developer's Guide for Java : Publish / Subscribe Using DataStreams and DataGroups : DataGroups Event Publishing
DataGroups Event Publishing
You can get references to any DataGroup from the nSession object. There are various writeDataGroup methods available. These methods also support batching of multiple events to a single group or batching of writes to multiple DataGroups.

myDataGroup = mySession.getDataGroup("myGroup");
nEventProperties props = new nEventProperties();

//You can add other types in a dictionary object
props.put("key0string"+x, "1"+x);
props.put("key1int", (int) 1);
props.put("key2long", (long) -11);

nConsumeEvent evt1 = new nConsumeEvent(props, buffer);

//Publish the event
mySession.writeDataGroup(evt1, myDataGroup);
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