GROUP_DATA
-
The GROUP_DATA policy applies to the publisher and subscriber entities via the
group_data
member of their respective QoS structures. Below is the IDL related to the group data QoS policy:
struct GroupDataQosPolicy {
sequence<octet> value;
};
-
By default, the
value
member is not set. It can be set to attach additional information to the created entities. The value of the GROUP_DATA policy is propagated via built-in topics. The data writer built-in topic data contains the GROUP_DATA from the publisher and the data reader built-in topic data contains the GROUP_DATA from the subscriber. The GROUP_DATA policy could be used to implement matching mechanisms similar to those of the PARTITION policy except the decision could be made based on an application-defined policy.