LIVELINESS

Determines the mechanism and parameters used by the application to determine whether a DDS_Entity is alive. More...

Data Structures
struct	DDS_LivelinessQosPolicy
	<<cert>> Determines the mechanism and parameters used by the application to determine whether a DDS_Entity is alive. 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...

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Detailed Description

Determines the mechanism and parameters used by the application to determine whether a DDS_Entity is alive.

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Enumeration Type Documentation

enum DDS_LivelinessQosPolicyKind

Kinds of liveliness.

QoS:

DDS_LivelinessQosPolicy

Enumerator:

DDS_AUTOMATIC_LIVELINESS_QOS	[default] The infrastructure will automatically signal liveliness for the DDS_DataWriter (s) at least as often as required by the DDS_DataWriter (S) 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.
DDS_MANUAL_BY_PARTICIPANT_LIVELINESS_QOS	RTI Connext DDS Micro 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 DataWriters belonging to that same DDS_DomainParticipant are also alive. The user application takes responsibility to signal liveliness to RTI Connext DDS Micro either by calling DDS_DomainParticipant_assert_liveliness, or by calling DDS_DataWriter_assert_liveliness, or FooDataWriter_write on any DDS_DataWriter belonging to the DDS_DomainParticipant.
DDS_MANUAL_BY_TOPIC_LIVELINESS_QOS	RTI Connext DDS Micro 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 Connext DDS Micro using the DDS_DataWriter_assert_liveliness function, or by writing some data.