System Properties.

RTI Connext uses the rti::core::policy::Property of a DomainParticipant to maintain a set of properties that provide system information such as hostname.

Unless the default dds::domain::qos::DomainParticipantQos value is overwritten, the system properties are automatically set in the dds::domain::qos::DomainParticipantQos obtained by calling the method dds::domain::DomainParticipant::default_participant_qos() or using the constant PARTICIPANT_QOS_DEFAULT.

System properties are also automatically set in the dds::domain::qos::DomainParticipantQos loaded from an XML QoS profile unless you disable property inheritance using the attribute inherit in the XML tag <property>.

By default, the system properties are propagated to other DomainParticipants in the system and can be accessed through dds::topic::ParticipantBuiltinTopicData::property.

You can disable the propagation of individual properties by setting the flag Property_t::propagate to false or by removing the property using the method PropertyQosPolicyHelper::remove_property.

The number of system properties set on the dds::domain::qos::DomainParticipantQos is platform specific.

System Properties List

The following table lists the supported system properties. For more information, see System Properties, in the Core Libraries User's Manual.

Property Name	Description
dds.sys_info.hostname	Name of the host where the process is running
dds.sys_info.process_id	Process ID
dds.sys_info.username	Name of the user running the process
dds.sys_info.execution_timestamp	Time when the execution started
dds.sys_info.creation_timestamp	Time when the executable was created
dds.sys_info.executable_filepath	Name and full path of the executable
dds.sys_info.target	Architecture for which the library was compiled

System Resource Consideration

System properties are affected by the resource limits rti::core::policy::DomainParticipantResourceLimits::participant_property_list_max_length and rti::core::policy::DomainParticipantResourceLimits::participant_property_string_max_length.