DDS_ReliableReaderActivityChangedStatus Struct Reference
[Data Writers]

<<eXtension>> Describes the activity (i.e. are acknowledgements forthcoming) of reliable readers matched to a reliable writer. More...


Data Fields

DDS_Long active_count
 The current number of reliable readers currently matched with this reliable writer.
DDS_Long inactive_count
 The number of reliable readers that have been dropped by this reliable writer because they failed to send acknowledgements in a timely fashion.
DDS_Long active_count_change
 The most recent change in the number of active remote reliable readers.
DDS_Long inactive_count_change
 The most recent change in the number of inactive remote reliable readers.
DDS_InstanceHandle_t last_instance_handle
 The instance handle of the last reliable remote reader to be determined inactive.


Detailed Description

<<eXtension>> Describes the activity (i.e. are acknowledgements forthcoming) of reliable readers matched to a reliable writer.

Entity:
DDS_DataWriter
Listener:
DDS_DataWriterListener
This status is the reciprocal status to the DDS_LivelinessChangedStatus on the reader. It is different than the DDS_LivelinessLostStatus on the writer in that the latter informs the writer about its own liveliness; this status informs the writer about the "liveliness" (activity) of its matched readers.

All counts in this status will remain at zero for best effort writers.


Field Documentation

The current number of reliable readers currently matched with this reliable writer.

The number of reliable readers that have been dropped by this reliable writer because they failed to send acknowledgements in a timely fashion.

A reader is considered to be inactive after is has been sent heartbeats DDS_RtpsReliableWriterProtocol_t::max_heartbeat_retries times, each heartbeat having been separated from the previous by the current heartbeat period.

The most recent change in the number of active remote reliable readers.

The most recent change in the number of inactive remote reliable readers.

The instance handle of the last reliable remote reader to be determined inactive.


RTI Data Distribution Service C API Version 4.5e Copyright © 23 Oct 2011 Real-Time Innovations, Inc