Fast DDS  Version 3.1.0
Fast DDS
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LivelinessChangedStatus Struct Reference

A struct storing the liveliness changed status. More...

#include <LivelinessChangedStatus.hpp>

Public Attributes

int32_t alive_count = 0
 The total number of currently active publishers that write the topic read by the subscriber.
 
int32_t not_alive_count = 0
 The total count of current publishers that write the topic read by the subscriber that are no longer asserting their liveliness.
 
int32_t alive_count_change = 0
 The change in the alive_count since the last time the listener was called or the status was read.
 
int32_t not_alive_count_change = 0
 The change in the not_alive_count since the last time the listener was called or the status was read.
 
InstanceHandle_t last_publication_handle
 Handle to the last publisher whose change in liveliness caused this status to change.
 

Detailed Description

A struct storing the liveliness changed status.

Member Data Documentation

◆ alive_count

int32_t alive_count = 0

The total number of currently active publishers that write the topic read by the subscriber.

This count increases when a newly matched publisher asserts its liveliness for the first time or when a publisher previously considered to be not alive reasserts its liveliness. The count decreases when a publisher considered alive fails to assert its liveliness and becomes not alive, whether because it was deleted normally or for some other reason

◆ alive_count_change

int32_t alive_count_change = 0

The change in the alive_count since the last time the listener was called or the status was read.

◆ last_publication_handle

InstanceHandle_t last_publication_handle

Handle to the last publisher whose change in liveliness caused this status to change.

◆ not_alive_count

int32_t not_alive_count = 0

The total count of current publishers that write the topic read by the subscriber that are no longer asserting their liveliness.

This count increases when a publisher considered alive fails to assert its liveliness and becomes not alive for some reason other than the normal deletion of that publisher. It decreases when a previously not alive publisher either reasserts its liveliness or is deleted normally

◆ not_alive_count_change

int32_t not_alive_count_change = 0

The change in the not_alive_count since the last time the listener was called or the status was read.


The documentation for this struct was generated from the following file: