146 lines
4.6 KiB
Python
146 lines
4.6 KiB
Python
# hobo - portal to configure and deploy applications
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# Copyright (C) 2019 Entr'ouvert
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Affero General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import threading
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from django.utils import six
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class TenantAwareThread(threading.Thread):
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def __init__(self, *args, **kwargs):
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from django.db import connection
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if hasattr(connection, 'get_tenant'):
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self.tenant = connection.get_tenant()
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else:
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self.tenant = None
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super(TenantAwareThread, self).__init__(*args, **kwargs)
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def run(self):
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if self.tenant is not None:
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from django.db import connection
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old_tenant = connection.get_tenant()
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connection.set_tenant(self.tenant)
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try:
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super(TenantAwareThread, self).run()
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finally:
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connection.set_tenant(old_tenant)
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connection.close()
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else:
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super(TenantAwareThread, self).run()
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class _Timer(TenantAwareThread):
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"""Call a function after a specified number of seconds:
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t = Timer(30.0, f, args=[], kwargs={})
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t.start()
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t.cancel() # stop the timer's action if it's still waiting
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"""
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def __init__(self, interval, function, args=[], kwargs={}):
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super(_Timer, self).__init__()
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self.interval = interval
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self.function = function
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self.args = args
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self.kwargs = kwargs
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self.finished = threading.Event()
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def cancel(self):
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"""Stop the timer if it hasn't finished yet"""
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self.finished.set()
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def run(self):
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self.finished.wait(self.interval)
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if not self.finished.is_set():
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self.function(*self.args, **self.kwargs)
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self.finished.set()
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class _MainThread(TenantAwareThread):
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def __init__(self):
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if six.PY3:
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super(_MainThread, self).__init__(name="MainThread", daemon=False)
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self._set_tstate_lock()
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self._started.set()
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self._set_ident()
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with threading._active_limbo_lock:
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threading._active[self._ident] = self
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else:
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super(_MainThread, self).__init__(name="MainThread")
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self._Thread__started.set()
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self._set_ident()
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with threading._active_limbo_lock:
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threading._active[threading._get_ident()] = self
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def _set_daemon(self):
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return False
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def _exitfunc(self):
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self._Thread__stop()
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t = threading._pickSomeNonDaemonThread()
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if t:
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if __debug__:
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self._note("%s: waiting for other threads", self)
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while t:
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t.join()
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t = threading._pickSomeNonDaemonThread()
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if __debug__:
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self._note("%s: exiting", self)
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self._Thread__delete()
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class _DummyThread(TenantAwareThread):
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def __init__(self):
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if six.PY3:
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super(_DummyThread, self).__init__(name=threading._newname("Dummy-%d"), daemon=True)
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self._started.set()
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self._set_ident()
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with threading._active_limbo_lock:
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threading._active[self._ident] = self
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return
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super(_DummyThread, self).__init__(name=threading._newname("Dummy-%d"))
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# Thread.__block consumes an OS-level locking primitive, which
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# can never be used by a _DummyThread. Since a _DummyThread
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# instance is immortal, that's bad, so release this resource.
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del self._Thread__block
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self._Thread__started.set()
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self._set_ident()
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with threading._active_limbo_lock:
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threading._active[threading._get_ident()] = self
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def _set_daemon(self):
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return True
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def join(self, timeout=None):
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assert False, "cannot join a dummy thread"
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def install_tenant_aware_threads():
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if getattr(threading, 'multitenant', False):
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return
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# Install tenant aware Thread class
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threading.Thread = TenantAwareThread
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threading._DummyThread = _DummyThread
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threading._MainThread = _MainThread
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threading._Timer = _Timer
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threading.multitenant = True
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