topic

class cyclonedds.topic.Topic(domain_participant, topic_name, data_type, qos=None, listener=None)

Bases: Entity, Generic[_S]

Representing a Topic

Parameters:

• domain_participant (cyclonedds.domain.DomainParticipant) –

• topic_name (AnyStr) –

• data_type (Type[_S]) –

• qos (Optional[Qos]) –

• listener (Optional[Listener]) –

get_name(max_size=256)

Return type:

str

property name: str

Get topic name

get_type_name(max_size=256)

Return type:

str

property typename: str

Get topic type name

set_topic_filter(callable)

Sets a filter and filter argument on a topic.

Parameters:

• callable (filter) – The filter function used to filter topic samples.

• topic (Topic) – The topic to set the filter function.

• Sample (Sample) – The sample that needs to be checked whether to be filtered.

Returns:

Whether this sample is filtered.

Return type:

bool

set_c_topic_filter(c_callable)

get_inconsistent_topic_status()

Get INCONSISTENT_TOPIC status

Raises:

DDSException: – If any error code is returned by the DDS API it is converted into an exception.

Returns:

The class ‘inconsistent_topic_status` value.

Return type:

inconsistent_topic_status