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#!/usr/bin/env python
#
# Copyright (C) 2013 Google Inc.
#
# This file is part of YouCompleteMe.
#
# YouCompleteMe is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# YouCompleteMe is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with YouCompleteMe. If not, see <http://www.gnu.org/licenses/>.
import time
import os
import copy
from ycm import utils
from threading import Thread, Lock
# This class implements the Bottle plugin API:
# http://bottlepy.org/docs/dev/plugindev.html
#
# The idea here is to decorate every route handler automatically so that on
# every request, we log when the request was made. Then a watchdog thread checks
# every check_interval_seconds whether the server has been idle for a time
# greater that the passed-in idle_suicide_seconds. If it has, we kill the
# server.
#
# We want to do this so that if something goes bonkers in Vim and the server
# never gets killed by the client, we don't end up with lots of zombie servers.
class WatchdogPlugin( object ):
name = 'watchdog'
api = 2
def __init__( self,
idle_suicide_seconds,
check_interval_seconds = 60 * 10 ):
self._check_interval_seconds = check_interval_seconds
self._idle_suicide_seconds = idle_suicide_seconds
self._last_request_time = time.time()
self._last_request_time_lock = Lock()
if idle_suicide_seconds <= 0:
return
self._watchdog_thread = Thread( target = self._WatchdogMain )
self._watchdog_thread.daemon = True
self._watchdog_thread.start()
def _GetLastRequestTime( self ):
with self._last_request_time_lock:
return copy.deepcopy( self._last_request_time )
def _SetLastRequestTime( self, new_value ):
with self._last_request_time_lock:
self._last_request_time = new_value
def _WatchdogMain( self ):
while True:
time.sleep( self._check_interval_seconds )
if time.time() - self._GetLastRequestTime() > self._idle_suicide_seconds:
utils.TerminateProcess( os.getpid() )
def __call__( self, callback ):
def wrapper( *args, **kwargs ):
self._SetLastRequestTime( time.time() )
return callback( *args, **kwargs )
return wrapper
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