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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2024-11-28 06:59
test	[ DIR ]	drwxr-xr-x	2024-11-28 06:59
__init__.py	3.29 KB	-rw-r--r--	2022-02-07 13:12
_buffer.py	1.49 KB	-rw-r--r--	2022-02-07 13:12
_capture.py	624 B	-rw-r--r--	2022-02-07 13:12
_file.py	2.28 KB	-rw-r--r--	2022-02-07 13:12
_filter.py	6.73 KB	-rw-r--r--	2022-02-07 13:12
_flatten.py	4.88 KB	-rw-r--r--	2022-02-07 13:12
_format.py	11.6 KB	-rw-r--r--	2022-02-07 13:12
_global.py	8.44 KB	-rw-r--r--	2022-02-07 13:12
_interfaces.py	2.29 KB	-rw-r--r--	2022-02-07 13:12
_io.py	4.46 KB	-rw-r--r--	2022-02-07 13:12
_json.py	8.24 KB	-rw-r--r--	2022-02-07 13:12
_legacy.py	5.12 KB	-rw-r--r--	2022-02-07 13:12
_levels.py	2.92 KB	-rw-r--r--	2022-02-07 13:12
_logger.py	9.75 KB	-rw-r--r--	2022-02-07 13:12
_observer.py	3.17 KB	-rw-r--r--	2022-02-07 13:12
_stdlib.py	4.44 KB	-rw-r--r--	2022-02-07 13:12
_util.py	1.37 KB	-rw-r--r--	2022-02-07 13:12

Rename

# -*- test-case-name: twisted.logger.test.test_observer -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Basic log observers.
"""

from typing import Callable, Optional

from zope.interface import implementer

from twisted.python.failure import Failure
from ._interfaces import ILogObserver, LogEvent
from ._logger import Logger

OBSERVER_DISABLED = (
    "Temporarily disabling observer {observer} due to exception: {log_failure}"
)

@implementer(ILogObserver)
class LogPublisher:
    """
    I{ILogObserver} that fans out events to other observers.

Keeps track of a set of L{ILogObserver} objects and forwards
    events to each.
    """

def __init__(self, *observers: ILogObserver) -> None:
        self._observers = list(observers)
        self.log = Logger(observer=self)

def addObserver(self, observer: ILogObserver) -> None:
        """
        Registers an observer with this publisher.

@param observer: An L{ILogObserver} to add.
        """
        if not callable(observer):
            raise TypeError(f"Observer is not callable: {observer!r}")
        if observer not in self._observers:
            self._observers.append(observer)

def removeObserver(self, observer: ILogObserver) -> None:
        """
        Unregisters an observer with this publisher.

@param observer: An L{ILogObserver} to remove.
        """
        try:
            self._observers.remove(observer)
        except ValueError:
            pass

def __call__(self, event: LogEvent) -> None:
        """
        Forward events to contained observers.
        """
        if "log_trace" not in event:
            trace: Optional[Callable[[ILogObserver], None]] = None

else:

def trace(observer: ILogObserver) -> None:
                """
                Add tracing information for an observer.

@param observer: an observer being forwarded to
                """
                event["log_trace"].append((self, observer))

brokenObservers = []

for observer in self._observers:
            if trace is not None:
                trace(observer)

try:
                observer(event)
            except Exception:
                brokenObservers.append((observer, Failure()))

for brokenObserver, failure in brokenObservers:
            errorLogger = self._errorLoggerForObserver(brokenObserver)
            errorLogger.failure(
                OBSERVER_DISABLED,
                failure=failure,
                observer=brokenObserver,
            )

def _errorLoggerForObserver(self, observer: ILogObserver) -> Logger:
        """
        Create an error-logger based on this logger, which does not contain the
        given bad observer.

@param observer: The observer which previously had an error.

@return: A L{Logger} without the given observer.
        """
        errorPublisher = LogPublisher(
            *(obs for obs in self._observers if obs is not observer)
        )
        return Logger(observer=errorPublisher)

@implementer(ILogObserver)
def bitbucketLogObserver(event: LogEvent) -> None:
    """
    I{ILogObserver} that does nothing with the events it sees.
    """