DDS_PublicationMatchedStatus Struct Reference

<<cert>> 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_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.

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Detailed Description

<<cert>> 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.

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Field Documentation

DDS_Long DDS_PublicationMatchedStatus::total_count

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.

DDS_Long DDS_PublicationMatchedStatus::total_count_change

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

DDS_Long DDS_PublicationMatchedStatus::current_count

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.

DDS_Long DDS_PublicationMatchedStatus::current_count_change

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

DDS_InstanceHandle_t DDS_PublicationMatchedStatus::last_subscription_handle

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