DDS_PublicationMatchedStatus Struct Reference
[Data Writers]

DDS_PUBLICATION_MATCHED_STATUS More...


Data Fields

DDS_Long total_count
 The total cumulative number of times the concerned DDS_DataWriter discovered a "match" with a DDS_DataReader.
DDS_Long total_count_change
 The incremental changes in total_count since the last time the listener was called or the status was read.
DDS_Long current_count
 The current number of readers with which the DDS_DataWriter is matched.
DDS_Long current_count_peak
 <<eXtension>> The highest value that current_count has reached until now.
DDS_Long current_count_change
 The change in current_count since the last time the listener was called or the status was read.
DDS_InstanceHandle_t last_subscription_handle
 A handle to the last DDS_DataReader that caused the the DDS_DataWriter's status to change.


Detailed Description

DDS_PUBLICATION_MATCHED_STATUS

A "match" happens when the DDS_DataWriter finds a DDS_DataReader for the same DDS_Topic and common partition with a requested QoS that is compatible with that offered by the DDS_DataWriter.

This status is also changed (and the listener, if any, called) when a match is ended. A local DDS_DataWriter will become "unmatched" from a remote DDS_DataReader when that DDS_DataReader goes away for any reason.


Field Documentation

The total cumulative number of times the concerned DDS_DataWriter discovered a "match" with a DDS_DataReader.

This number increases whenever a new match is discovered. It does not change when an existing match goes away.

The incremental changes in total_count since the last time the listener was called or the status was read.

The current number of readers with which the DDS_DataWriter is matched.

This number increases when a new match is discovered and decreases when an existing match goes away.

<<eXtension>> The highest value that current_count has reached until now.

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

A handle to the last DDS_DataReader that caused the the DDS_DataWriter's status to change.


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