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Edit File : monitor.py \| Size : 3.55 KB
import os import time from threading import Thread, Lock import sentry_sdk from sentry_sdk.utils import logger from typing import TYPE_CHECKING if TYPE_CHECKING: from typing import Optional MAX_DOWNSAMPLE_FACTOR = 10 class Monitor: """ Performs health checks in a separate thread once every interval seconds and updates the internal state. Other parts of the SDK only read this state and act accordingly. """ name = "sentry.monitor" def __init__(self, transport, interval=10): # type: (sentry_sdk.transport.Transport, float) -> None self.transport = transport # type: sentry_sdk.transport.Transport self.interval = interval # type: float self._healthy = True self._downsample_factor = 0 # type: int self._thread = None # type: Optional[Thread] self._thread_lock = Lock() self._thread_for_pid = None # type: Optional[int] self._running = True def _ensure_running(self): # type: () -> None """ Check that the monitor has an active thread to run in, or create one if not. Note that this might fail (e.g. in Python 3.12 it's not possible to spawn new threads at interpreter shutdown). In that case self._running will be False after running this function. """ if self._thread_for_pid == os.getpid() and self._thread is not None: return None with self._thread_lock: if self._thread_for_pid == os.getpid() and self._thread is not None: return None def _thread(): # type: (...) -> None while self._running: time.sleep(self.interval) if self._running: self.run() thread = Thread(name=self.name, target=_thread) thread.daemon = True try: thread.start() except RuntimeError: # Unfortunately at this point the interpreter is in a state that no # longer allows us to spawn a thread and we have to bail. self._running = False return None self._thread = thread self._thread_for_pid = os.getpid() return None def run(self): # type: () -> None self.check_health() self.set_downsample_factor() def set_downsample_factor(self): # type: () -> None if self._healthy: if self._downsample_factor > 0: logger.debug( "[Monitor] health check positive, reverting to normal sampling" ) self._downsample_factor = 0 else: if self.downsample_factor < MAX_DOWNSAMPLE_FACTOR: self._downsample_factor += 1 logger.debug( "[Monitor] health check negative, downsampling with a factor of %d", self._downsample_factor, ) def check_health(self): # type: () -> None """ Perform the actual health checks, currently only checks if the transport is rate-limited. TODO: augment in the future with more checks. """ self._healthy = self.transport.is_healthy() def is_healthy(self): # type: () -> bool self._ensure_running() return self._healthy @property def downsample_factor(self): # type: () -> int self._ensure_running() return self._downsample_factor def kill(self): # type: () -> None self._running = False Back

Edit File : monitor.py | Size : 3.55 KB

import os
import time
from threading import Thread, Lock

import sentry_sdk
from sentry_sdk.utils import logger

from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from typing import Optional

MAX_DOWNSAMPLE_FACTOR = 10

class Monitor:
    """
    Performs health checks in a separate thread once every interval seconds
    and updates the internal state. Other parts of the SDK only read this state
    and act accordingly.
    """

name = "sentry.monitor"

def __init__(self, transport, interval=10):
        # type: (sentry_sdk.transport.Transport, float) -> None
        self.transport = transport  # type: sentry_sdk.transport.Transport
        self.interval = interval  # type: float

self._healthy = True
        self._downsample_factor = 0  # type: int

self._thread = None  # type: Optional[Thread]
        self._thread_lock = Lock()
        self._thread_for_pid = None  # type: Optional[int]
        self._running = True

def _ensure_running(self):
        # type: () -> None
        """
        Check that the monitor has an active thread to run in, or create one if not.

Note that this might fail (e.g. in Python 3.12 it's not possible to
        spawn new threads at interpreter shutdown). In that case self._running
        will be False after running this function.
        """
        if self._thread_for_pid == os.getpid() and self._thread is not None:
            return None

with self._thread_lock:
            if self._thread_for_pid == os.getpid() and self._thread is not None:
                return None

def _thread():
                # type: (...) -> None
                while self._running:
                    time.sleep(self.interval)
                    if self._running:
                        self.run()

thread = Thread(name=self.name, target=_thread)
            thread.daemon = True
            try:
                thread.start()
            except RuntimeError:
                # Unfortunately at this point the interpreter is in a state that no
                # longer allows us to spawn a thread and we have to bail.
                self._running = False
                return None

self._thread = thread
            self._thread_for_pid = os.getpid()

return None

def run(self):
        # type: () -> None
        self.check_health()
        self.set_downsample_factor()

def set_downsample_factor(self):
        # type: () -> None
        if self._healthy:
            if self._downsample_factor > 0:
                logger.debug(
                    "[Monitor] health check positive, reverting to normal sampling"
                )
            self._downsample_factor = 0
        else:
            if self.downsample_factor < MAX_DOWNSAMPLE_FACTOR:
                self._downsample_factor += 1
            logger.debug(
                "[Monitor] health check negative, downsampling with a factor of %d",
                self._downsample_factor,
            )

def check_health(self):
        # type: () -> None
        """
        Perform the actual health checks,
        currently only checks if the transport is rate-limited.
        TODO: augment in the future with more checks.
        """
        self._healthy = self.transport.is_healthy()

def is_healthy(self):
        # type: () -> bool
        self._ensure_running()
        return self._healthy

@property
    def downsample_factor(self):
        # type: () -> int
        self._ensure_running()
        return self._downsample_factor

def kill(self):
        # type: () -> None
        self._running = False

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