GNXSOFT.COM

gnx-react/venv/lib/python3.12/site-packages/celery/concurrency/gevent.py

@@ -0,0 +1,122 @@
+"""Gevent execution pool."""
+from time import monotonic
+
+from kombu.asynchronous import timer as _timer
+
+from . import base
+
+try:
+    from gevent import Timeout
+except ImportError:
+    Timeout = None
+
+__all__ = ('TaskPool',)
+
+# pylint: disable=redefined-outer-name
+# We cache globals and attribute lookups, so disable this warning.
+
+
+def apply_timeout(target, args=(), kwargs=None, callback=None,
+                  accept_callback=None, pid=None, timeout=None,
+                  timeout_callback=None, Timeout=Timeout,
+                  apply_target=base.apply_target, **rest):
+    kwargs = {} if not kwargs else kwargs
+    try:
+        with Timeout(timeout):
+            return apply_target(target, args, kwargs, callback,
+                                accept_callback, pid,
+                                propagate=(Timeout,), **rest)
+    except Timeout:
+        return timeout_callback(False, timeout)
+
+
+class Timer(_timer.Timer):
+
+    def __init__(self, *args, **kwargs):
+        from gevent import Greenlet, GreenletExit
+
+        class _Greenlet(Greenlet):
+            cancel = Greenlet.kill
+
+        self._Greenlet = _Greenlet
+        self._GreenletExit = GreenletExit
+        super().__init__(*args, **kwargs)
+        self._queue = set()
+
+    def _enter(self, eta, priority, entry, **kwargs):
+        secs = max(eta - monotonic(), 0)
+        g = self._Greenlet.spawn_later(secs, entry)
+        self._queue.add(g)
+        g.link(self._entry_exit)
+        g.entry = entry
+        g.eta = eta
+        g.priority = priority
+        g.canceled = False
+        return g
+
+    def _entry_exit(self, g):
+        try:
+            g.kill()
+        finally:
+            self._queue.discard(g)
+
+    def clear(self):
+        queue = self._queue
+        while queue:
+            try:
+                queue.pop().kill()
+            except KeyError:
+                pass
+
+    @property
+    def queue(self):
+        return self._queue
+
+
+class TaskPool(base.BasePool):
+    """GEvent Pool."""
+
+    Timer = Timer
+
+    signal_safe = False
+    is_green = True
+    task_join_will_block = False
+    _pool = None
+    _quick_put = None
+
+    def __init__(self, *args, **kwargs):
+        from gevent import spawn_raw
+        from gevent.pool import Pool
+        self.Pool = Pool
+        self.spawn_n = spawn_raw
+        self.timeout = kwargs.get('timeout')
+        super().__init__(*args, **kwargs)
+
+    def on_start(self):
+        self._pool = self.Pool(self.limit)
+        self._quick_put = self._pool.spawn
+
+    def on_stop(self):
+        if self._pool is not None:
+            self._pool.join()
+
+    def on_apply(self, target, args=None, kwargs=None, callback=None,
+                 accept_callback=None, timeout=None,
+                 timeout_callback=None, apply_target=base.apply_target, **_):
+        timeout = self.timeout if timeout is None else timeout
+        return self._quick_put(apply_timeout if timeout else apply_target,
+                               target, args, kwargs, callback, accept_callback,
+                               timeout=timeout,
+                               timeout_callback=timeout_callback)
+
+    def grow(self, n=1):
+        self._pool._semaphore.counter += n
+        self._pool.size += n
+
+    def shrink(self, n=1):
+        self._pool._semaphore.counter -= n
+        self._pool.size -= n
+
+    @property
+    def num_processes(self):
+        return len(self._pool)