Template for creating a row if and only if one doesn't already exists. This suffers
from some of the same concurrency issues as described in the UpsertTemplate. See the
detailed javadoc there for a description.
Fields inherited from class org.opennms.netmgt.dao.support.UpsertTemplate
Override this method to insert a new object into the database. This method will be called
when the query method returns null. A DataIntegrityViolationException should be thrown if
the insert has already occurred. (This is the normal exception thrown when to objects with the
same id are inserted).