LIVELINESS
[QoS Policies]

Specifies and configures the mechanism that allows DDS::DataReader entities to detect when DDS::DataWriter entities become disconnected or "dead.". More...

Classes

struct  DDS::LivelinessQosPolicy
 Specifies and configures the mechanism that allows DDS::DataReader entities to detect when DDS::DataWriter entities become disconnected or "dead.". More...

Enumerations

enum  DDS::LivelinessQosPolicyKind {
  DDS::AUTOMATIC_LIVELINESS_QOS,
  DDS::MANUAL_BY_PARTICIPANT_LIVELINESS_QOS,
  DDS::MANUAL_BY_TOPIC_LIVELINESS_QOS
}
 Kinds of liveliness. More...

Functions

static System::String^ DDS::LivelinessQosPolicy::get_livelines_qos_policy_name ()
 Stringified human-readable name for DDS::LivelinessQosPolicy.

Detailed Description

Specifies and configures the mechanism that allows DDS::DataReader entities to detect when DDS::DataWriter entities become disconnected or "dead.".


Enumeration Type Documentation

Kinds of liveliness.

QoS:
DDS::LivelinessQosPolicy
Enumerator:
AUTOMATIC_LIVELINESS_QOS  [default] The infrastructure will automatically signal liveliness for the DDS::DataWriter (s) at least as often as required by the lease_duration.

A DDS::DataWriter with this setting does not need to take any specific action in order to be considered 'alive.' The DDS::DataWriter is only 'not alive' when the participant to which it belongs terminates (gracefully or not), or when there is a network problem that prevents the current participant from contacting that remote participant.

MANUAL_BY_PARTICIPANT_LIVELINESS_QOS  RTI Data Distribution Service will assume that as long as at least one DDS::DataWriter belonging to the DDS::DomainParticipant (or the DDS::DomainParticipant itself) has asserted its liveliness, then the other Entities belonging to that same DDS::DomainParticipant are also alive.

The user application takes responsibility to signal liveliness to RTI Data Distribution Service either by calling DDS::DomainParticipant::assert_liveliness, or by calling DDS::DataWriter::assert_liveliness, or DDS::TypedDataWriter::write on any DDS::DataWriter belonging to the DDS::DomainParticipant.

MANUAL_BY_TOPIC_LIVELINESS_QOS  RTI Data Distribution Service will only assume liveliness of the DDS::DataWriter if the application has asserted liveliness of that DDS::DataWriter itself.

The user application takes responsibility to signal liveliness to RTI Data Distribution Service using the DDS::DataWriter::assert_liveliness method, or by writing some data.


Function Documentation

static System::String ^ DDS::LivelinessQosPolicy::get_livelines_qos_policy_name (  )  [inline, static, inherited]

Stringified human-readable name for DDS::LivelinessQosPolicy.


RTI Data Distribution Service .Net APIs Version 4.5e Copyright © 23 Oct 2011 Real-Time Innovations, Inc