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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_buffer -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
Log observer that maintains a buffer.
"""

from collections import deque
from typing import Deque, Optional

from zope.interface import implementer

from ._interfaces import ILogObserver, LogEvent

_DEFAULT_BUFFER_MAXIMUM = 64 * 1024

@implementer(ILogObserver)
class LimitedHistoryLogObserver:
    """
    L{ILogObserver} that stores events in a buffer of a fixed size::

>>> from twisted.logger import LimitedHistoryLogObserver
        >>> history = LimitedHistoryLogObserver(5)
        >>> for n in range(10): history({'n': n})
        ...
        >>> repeats = []
        >>> history.replayTo(repeats.append)
        >>> len(repeats)
        5
        >>> repeats
        [{'n': 5}, {'n': 6}, {'n': 7}, {'n': 8}, {'n': 9}]
        >>>
    """

def __init__(self, size: Optional[int] = _DEFAULT_BUFFER_MAXIMUM) -> None:
        """
        @param size: The maximum number of events to buffer.  If L{None}, the
            buffer is unbounded.
        """
        self._buffer: Deque[LogEvent] = deque(maxlen=size)

def __call__(self, event: LogEvent) -> None:
        self._buffer.append(event)

def replayTo(self, otherObserver: ILogObserver) -> None:
        """
        Re-play the buffered events to another log observer.

@param otherObserver: An observer to replay events to.
        """
        for event in self._buffer:
            otherObserver(event)