DDS_DataWriterListener Struct Reference

<<interface>> <<cert>> DDS_Listener for writer status. More...

#include <dds_c_publication.h>

Data Fields
struct DDS_Listener	as_listener
	<<cert>> The superclass instance of this DDS_DataWriterListener.
DDS_DataWriterListener_OfferedDeadlineMissedCallback	on_offered_deadline_missed
	<<cert>> Handles the DDS_OFFERED_DEADLINE_MISSED_STATUS status.
DDS_DataWriterListener_OfferedIncompatibleQosCallback	on_offered_incompatible_qos
	<<cert>> Handles the DDS_OFFERED_INCOMPATIBLE_QOS_STATUS status.
DDS_DataWriterListener_LivelinessLostCallback	on_liveliness_lost
	<<cert>> Handles the DDS_LIVELINESS_LOST_STATUS status.
DDS_DataWriterListener_PublicationMatchedCallback	on_publication_matched
	<<cert>> Handles the DDS_PUBLICATION_MATCHED_STATUS status.
DDS_DataWriterListener_ReliableReaderActivityChangedCallback	on_reliable_reader_activity_changed
	<<eXtension>> <<cert>> A matched reliable reader has become active or become inactive.

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Detailed Description

<<interface>> <<cert>> DDS_Listener for writer status.

Entity:

DDS_DataWriter

Status:

DDS_LIVELINESS_LOST_STATUS, DDS_LivelinessLostStatus;
DDS_OFFERED_INCOMPATIBLE_QOS_STATUS, DDS_OfferedIncompatibleQosStatus;
DDS_PUBLICATION_MATCHED_STATUS, DDS_PublicationMatchedStatus;

See also:

Status Kinds

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Field Documentation

struct DDS_Listener DDS_DataWriterListener::as_listener

<<cert>> The superclass instance of this DDS_DataWriterListener.

DDS_DataWriterListener_OfferedDeadlineMissedCallback DDS_DataWriterListener::on_offered_deadline_missed

<<cert>> Handles the DDS_OFFERED_DEADLINE_MISSED_STATUS status.

This callback is called when the deadline that the DDS_DataWriter has committed through its DEADLINE qos policy was not respected for a specific instance. This callback is called for each deadline period elapsed during which the DDS_DataWriter failed to provide data for an instance.

DDS_DataWriterListener_OfferedIncompatibleQosCallback DDS_DataWriterListener::on_offered_incompatible_qos

<<cert>> Handles the DDS_OFFERED_INCOMPATIBLE_QOS_STATUS status.

This callback is called when the DDS_DataWriterQos of the DDS_DataWriter was incompatible with what was requested by a DDS_DataReader. This callback is called when a DDS_DataWriter has discovered a DDS_DataReader for the same DDS_Topic and common partition, but with a requested QoS that is incompatible with that offered by the DDS_DataWriter.

DDS_DataWriterListener_LivelinessLostCallback DDS_DataWriterListener::on_liveliness_lost

<<cert>> Handles the DDS_LIVELINESS_LOST_STATUS status.

This callback is called when the liveliness that the DDS_DataWriter has committed through its LIVELINESS qos policy was not respected; this DDS_DataReader entities will consider the DDS_DataWriter as no longer "alive/active". This callback will not be called when an already not alive DDS_DataWriter simply renames not alive for another liveliness period.

DDS_DataWriterListener_PublicationMatchedCallback DDS_DataWriterListener::on_publication_matched

<<cert>> Handles the DDS_PUBLICATION_MATCHED_STATUS status.

This callback is called when the DDS_DataWriter has found a DDS_DataReader that matches the DDS_Topic, has a common partition and compatible QoS, or has ceased to be matched with a DDS_DataReader that was previously considered to be matched.

DDS_DataWriterListener_ReliableReaderActivityChangedCallback DDS_DataWriterListener::on_reliable_reader_activity_changed

<<eXtension>> <<cert>> A matched reliable reader has become active or become inactive.

A reliable writer considers a matched reliable reader to be active when it receives ACKNACK messages from the reader in response to its HEARTBEAT messages. The writer considers an active reader to have become inactive when it has sent a number of consecutive periodic HEARTBEATs equal to DDS_RtpsReliableWriterProtocol_t::max_heartbeat_retries without receiving an ACKNACK from the reader. An inactive reader becomes active once the writer receives an ACKNACK from it. This callback is called when the transition from active to inactive, and vice versa, has occurred for a matched reliable reader.