LIVELINESS
[QoS Policies]

Specifies and configures the mechanism that allows DDS_DataReader entities to detect when DDS_DataWriter entities become disconnected or "dead.". More...

Data Structures
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...
Variables
const char *const	DDS_LIVELINESS_QOS_POLICY_NAME
	Stringified human-readable name for DDS_LivelinessQosPolicy.

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Detailed Description

Specifies and configures the mechanism that allows DDS_DataReader entities to detect when DDS_DataWriter entities become disconnected or "dead.".

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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 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 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 FooDataWriter_write on any DDS_DataWriter belonging to the DDS_DomainParticipant.
DDS_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 function, or by writing some data.

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Variable Documentation

const char* const DDS_LIVELINESS_QOS_POLICY_NAME

Stringified human-readable name for DDS_LivelinessQosPolicy.