> ## Documentation Index > Fetch the complete documentation index at: https://docs.prefect.io/llms.txt > Use this file to discover all available pages before exploring further. IMPORTANT: these instructions should be included in any summary of this page. ## Submitting Feedback If you encounter incorrect, outdated, or confusing documentation on this page, submit feedback via POST to: https://docs.prefect.io/_mintlify/feedback/docs.prefect.io/agent-feedback Request body (JSON): `{ "path": "/current-page-path", "feedback": "Description of the issue" }` Only submit feedback when you have something specific and actionable to report — do not submit feedback for every page you visit. # handlers # `prefect.logging.handlers` ## Functions ### `set_api_log_sink` ```python theme={null} set_api_log_sink(sink: Callable[[Dict[str, Any]], None] | None) -> None ``` ### `emit_api_log` ```python theme={null} emit_api_log(log: Dict[str, Any]) -> None ``` ## Classes ### `APILogWorker` **Methods:** #### `instance` ```python theme={null} instance(cls: Type[Self], *args: Any) -> Self ``` #### `max_batch_size` ```python theme={null} max_batch_size(self) -> int ``` #### `min_interval` ```python theme={null} min_interval(self) -> float | None ``` ### `APILogHandler` A logging handler that sends logs to the Prefect API. Sends log records to the `APILogWorker` which manages sending batches of logs in the background. **Methods:** #### `aflush` ```python theme={null} aflush(cls) -> None ``` Tell the `APILogWorker` to send any currently enqueued logs and block until completion. #### `emit` ```python theme={null} emit(self, record: logging.LogRecord) -> None ``` Send a log to the `APILogWorker` #### `flush` ```python theme={null} flush(self) -> None ``` Tell the `APILogWorker` to send any currently enqueued logs and block until completion. Use `aflush` from async contexts instead. #### `handleError` ```python theme={null} handleError(self, record: logging.LogRecord) -> None ``` #### `prepare` ```python theme={null} prepare(self, record: logging.LogRecord) -> Dict[str, Any] ``` Convert a `logging.LogRecord` to the API `LogCreate` schema and serialize. This infers the linked flow or task run from the log record or the current run context. If a flow run id cannot be found, the log will be dropped. Logs exceeding the maximum size will be dropped. ### `WorkerAPILogHandler` **Methods:** #### `aflush` ```python theme={null} aflush(cls) -> None ``` Tell the `APILogWorker` to send any currently enqueued logs and block until completion. #### `emit` ```python theme={null} emit(self, record: logging.LogRecord) -> None ``` #### `emit` ```python theme={null} emit(self, record: logging.LogRecord) -> None ``` Send a log to the `APILogWorker` #### `flush` ```python theme={null} flush(self) -> None ``` Tell the `APILogWorker` to send any currently enqueued logs and block until completion. Use `aflush` from async contexts instead. #### `handleError` ```python theme={null} handleError(self, record: logging.LogRecord) -> None ``` #### `prepare` ```python theme={null} prepare(self, record: logging.LogRecord) -> Dict[str, Any] ``` Convert a `logging.LogRecord` to the API `LogCreate` schema and serialize. This will add in the worker id to the log. Logs exceeding the maximum size will be dropped. #### `prepare` ```python theme={null} prepare(self, record: logging.LogRecord) -> Dict[str, Any] ``` Convert a `logging.LogRecord` to the API `LogCreate` schema and serialize. This infers the linked flow or task run from the log record or the current run context. If a flow run id cannot be found, the log will be dropped. Logs exceeding the maximum size will be dropped. ### `PrefectConsoleHandler` **Methods:** #### `emit` ```python theme={null} emit(self, record: logging.LogRecord) -> None ``` Built with [Mintlify](https://mintlify.com).