Creating and Deleting Listeners

There is no factory for creating or deleting a Listener; use the natural means in each language binding (for example, “new” or “delete” in C++ or Java). For example:

class HelloWorldListener : public DDSDataReaderListener {
    virtual void on_data_available(DDSDataReader* reader);
};
void HelloWorldListener::on_data_available(DDSDataReader* reader)
{
    printf("received data\n");
}
// Create a Listener
HelloWorldListener *reader_listener = NULL; 
reader_listener = new HelloWorldListener();
// Delete a Listener
delete reader_listener;

A listener cannot be deleted until the entity it is attached to has been deleted. For example, you must delete the DataReader before deleting the DataReader’s listener.

Note: Due to a thread-safety issue, the destruction of a DomainParticipantListener from an enabled DomainParticipant should be avoided—even if the DomainParticipantListener has been removed from the DomainParticipant. (This limitation does not affect the Java API.)

© 2016 RTI