faust.sensors.base

Base-interface for sensors.

class faust.sensors.base.Sensor(*, beacon: Optional[NodeT] = None, loop: Optional[AbstractEventLoop] = None)

Base class for sensors.

This sensor does not do anything at all, but can be subclassed to create new monitors.

on_message_in(tp: TP, offset: int, message: Message) → None

Message received by a consumer.

Return type:

None

on_stream_event_in(tp: TP, offset: int, stream: StreamT, event: EventT) → Optional[Dict]

Message sent to a stream as an event.

Return type:

_UnionGenericAlias[_SpecialGenericAlias, None]

on_stream_event_out(tp: TP, offset: int, stream: StreamT, event: EventT, state: Optional[Dict] = None) → None

Event was acknowledged by stream.

Notes

Acknowledged means a stream finished processing the event, but given that multiple streams may be handling the same event, the message cannot be committed before all streams have processed it. When all streams have acknowledged the event, it will go through on_message_out() just before offsets are committed.

Return type:

None

on_message_out(tp: TP, offset: int, message: Message) → None

All streams finished processing message.

Return type:

None

on_topic_buffer_full(tp: TP) → None

Topic buffer full so conductor had to wait.

Return type:

None

on_table_get(table: CollectionT, key: Any) → None

Key retrieved from table.

Return type:

None

on_table_set(table: CollectionT, key: Any, value: Any) → None

Value set for key in table.

Return type:

None

on_table_del(table: CollectionT, key: Any) → None

Key deleted from table.

Return type:

None

on_commit_initiated(consumer: ConsumerT) → Any

Consumer is about to commit topic offset.

Return type:

Any

on_commit_completed(consumer: ConsumerT, state: Any) → None

Consumer finished committing topic offset.

Return type:

None

on_send_initiated(producer: ProducerT, topic: str, message: PendingMessage, keysize: int, valsize: int) → Any

About to send a message.

Return type:

Any

on_send_completed(producer: ProducerT, state: Any, metadata: RecordMetadata) → None

Message successfully sent.

Return type:

None

on_send_error(producer: ProducerT, exc: BaseException, state: Any) → None

Error while sending message.

Return type:

None

on_assignment_start(assignor: PartitionAssignorT) → Dict

Partition assignor is starting to assign partitions.

Return type:

_SpecialGenericAlias

on_assignment_error(assignor: PartitionAssignorT, state: Dict, exc: BaseException) → None

Partition assignor did not complete assignor due to error.

Return type:

None

on_assignment_completed(assignor: PartitionAssignorT, state: Dict) → None

Partition assignor completed assignment.

Return type:

None

on_rebalance_start(app: AppT) → Dict

Cluster rebalance in progress.

Return type:

_SpecialGenericAlias

on_rebalance_return(app: AppT, state: Dict) → None

Consumer replied assignment is done to broker.

Return type:

None

on_rebalance_end(app: AppT, state: Dict) → None

Cluster rebalance fully completed (including recovery).

Return type:

None

on_web_request_start(app: AppT, request: Request, *, view: Optional[View] = None) → Dict

Web server started working on request.

Return type:

_SpecialGenericAlias

on_web_request_end(app: AppT, request: Request, response: Optional[Response], state: Dict, *, view: Optional[View] = None) → None

Web server finished working on request.

Return type:

None

on_threaded_producer_buffer_processed(app: AppT, size: int) → None

Return type:

None

asdict() → Mapping

Convert sensor state to dictionary.

Return type:

_SpecialGenericAlias

logger: logging.Logger = <Logger faust.sensors.base (WARNING)>

log: CompositeLogger

diag: DiagT

async_exit_stack: AsyncExitStack

exit_stack: ExitStack

class faust.sensors.base.SensorDelegate(app: AppT)

A class that delegates sensor methods to a list of sensors.

add(sensor: SensorT) → None

Add sensor.

Return type:

None

remove(sensor: SensorT) → None

Remove sensor.

Return type:

None

on_message_in(tp: TP, offset: int, message: Message) → None

Call before message is delegated to streams.

Return type:

None

on_stream_event_in(tp: TP, offset: int, stream: StreamT, event: EventT) → Optional[Dict]

Call when stream starts processing an event.

Return type:

_UnionGenericAlias[_SpecialGenericAlias, None]

on_stream_event_out(tp: TP, offset: int, stream: StreamT, event: EventT, state: Optional[Dict] = None) → None

Call when stream is done processing an event.

Return type:

None

on_topic_buffer_full(tp: TP) → None

Call when conductor topic buffer is full and has to wait.

Return type:

None

on_message_out(tp: TP, offset: int, message: Message) → None

Call when message is fully acknowledged and can be committed.

Return type:

None

on_table_get(table: CollectionT, key: Any) → None

Call when value in table is retrieved.

Return type:

None

on_table_set(table: CollectionT, key: Any, value: Any) → None

Call when new value for key in table is set.

Return type:

None

on_table_del(table: CollectionT, key: Any) → None

Call when key in a table is deleted.

Return type:

None

on_commit_initiated(consumer: ConsumerT) → Any

Call when consumer commit offset operation starts.

Return type:

Any

on_commit_completed(consumer: ConsumerT, state: Any) → None

Call when consumer commit offset operation completed.

Return type:

None

on_send_initiated(producer: ProducerT, topic: str, message: PendingMessage, keysize: int, valsize: int) → Any

Call when message added to producer buffer.

Return type:

Any

on_send_completed(producer: ProducerT, state: Any, metadata: RecordMetadata) → None

Call when producer finished sending message.

Return type:

None

on_send_error(producer: ProducerT, exc: BaseException, state: Any) → None

Call when producer was unable to publish message.

Return type:

None

on_assignment_start(assignor: PartitionAssignorT) → Dict

Partition assignor is starting to assign partitions.

Return type:

_SpecialGenericAlias

on_assignment_error(assignor: PartitionAssignorT, state: Dict, exc: BaseException) → None

Partition assignor did not complete assignor due to error.

Return type:

None

on_assignment_completed(assignor: PartitionAssignorT, state: Dict) → None

Partition assignor completed assignment.

Return type:

None

on_rebalance_start(app: AppT) → Dict

Cluster rebalance in progress.

Return type:

_SpecialGenericAlias

on_rebalance_return(app: AppT, state: Dict) → None

Consumer replied assignment is done to broker.

Return type:

None

on_rebalance_end(app: AppT, state: Dict) → None

Cluster rebalance fully completed (including recovery).

Return type:

None

on_web_request_start(app: AppT, request: Request, *, view: Optional[View] = None) → Dict

Web server started working on request.

Return type:

_SpecialGenericAlias

on_web_request_end(app: AppT, request: Request, response: Optional[Response], state: Dict, *, view: Optional[View] = None) → None

Web server finished working on request.

Return type:

None

on_threaded_producer_buffer_processed(app: AppT, size: int) → None

Return type:

None