18.1.4.2. DataReaderListener

class DataReaderListener

Class DataReaderListener, it should be used by the end user to implement specific callbacks to certain actions.

Subclassed by eprosima::fastdds::dds::SubscriberListener

Public Functions

inline DataReaderListener()

Constructor.

inline virtual ~DataReaderListener()

Destructor.

inline virtual void on_data_available(DataReader *reader)

Virtual function to be implemented by the user containing the actions to be performed when new Data Messages are received.

Parameters

reader – DataReader

inline virtual void on_subscription_matched(DataReader *reader, const fastdds::dds::SubscriptionMatchedStatus &info)

Virtual method to be called when the subscriber is matched with a new Writer (or unmatched); i.e., when a writer publishing in the same topic is discovered.

Parameters

  • reader – DataReader

  • info – The subscription matched status

inline virtual void on_requested_deadline_missed(DataReader *reader, const fastrtps::RequestedDeadlineMissedStatus &status)

Virtual method to be called when a topic misses the deadline period

Parameters

  • reader – DataReader

  • status – The requested deadline missed status

inline virtual void on_liveliness_changed(DataReader *reader, const fastrtps::LivelinessChangedStatus &status)

Method called when the liveliness status associated to a subscriber changes.

Parameters

  • reader – The DataReader

  • status – The liveliness changed status

inline virtual void on_sample_rejected(DataReader *reader, const fastrtps::SampleRejectedStatus &status)

Method called when a sample was rejected.

Parameters

  • reader – The DataReader

  • status – The rejected status

inline virtual void on_requested_incompatible_qos(DataReader *reader, const RequestedIncompatibleQosStatus &status)

Method called an incompatible QoS was requested.

Parameters

  • reader – The DataReader

  • status – The requested incompatible QoS status

inline virtual void on_sample_lost(DataReader *reader, const SampleLostStatus &status)

Method called when a sample was lost.

Parameters

  • reader – The DataReader

  • status – The sample lost status