cron cleanup, back to the Kernighan KISS roots 1min poll time, rely only on database, multiprocess/multiserver ready.
Nota: If we replace sequence signaling for cache invalidation with pg listen/notify in the future, we will use the same mechanism for more accurate cron timing. bzr revid: al@openerp.com-20121209170447-zs0k3jazokylwvar
This commit is contained in:
parent
d7d1fe562c
commit
42f292af93
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@ -31,7 +31,6 @@ import netsvc
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import openerp
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import pooler
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import tools
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from openerp.cron import WAKE_UP_NOW
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from osv import fields, osv
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from tools import DEFAULT_SERVER_DATETIME_FORMAT
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from tools.safe_eval import safe_eval as eval
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@ -142,130 +141,6 @@ class ir_cron(osv.osv):
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except Exception, e:
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self._handle_callback_exception(cr, uid, model_name, method_name, args, job_id, e)
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def _run_job(self, cr, job, now):
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""" Run a given job taking care of the repetition.
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The cursor has a lock on the job (aquired by _run_jobs_multithread()) and this
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method is run in a worker thread (spawned by _run_jobs_multithread())).
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:param job: job to be run (as a dictionary).
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:param now: timestamp (result of datetime.now(), no need to call it multiple time).
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"""
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try:
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nextcall = datetime.strptime(job['nextcall'], DEFAULT_SERVER_DATETIME_FORMAT)
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numbercall = job['numbercall']
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ok = False
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while nextcall < now and numbercall:
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if numbercall > 0:
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numbercall -= 1
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if not ok or job['doall']:
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self._callback(cr, job['user_id'], job['model'], job['function'], job['args'], job['id'])
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if numbercall:
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nextcall += _intervalTypes[job['interval_type']](job['interval_number'])
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ok = True
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addsql = ''
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if not numbercall:
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addsql = ', active=False'
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cr.execute("UPDATE ir_cron SET nextcall=%s, numbercall=%s"+addsql+" WHERE id=%s",
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(nextcall.strftime(DEFAULT_SERVER_DATETIME_FORMAT), numbercall, job['id']))
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if numbercall:
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# Reschedule our own main cron thread if necessary.
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# This is really needed if this job runs longer than its rescheduling period.
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nextcall = calendar.timegm(nextcall.timetuple())
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openerp.cron.schedule_wakeup(nextcall, cr.dbname)
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finally:
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cr.commit()
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cr.close()
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openerp.cron.release_thread_slot()
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def _run_jobs_multithread(self):
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# TODO remove 'check' argument from addons/base_action_rule/base_action_rule.py
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""" Process the cron jobs by spawning worker threads.
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This selects in database all the jobs that should be processed. It then
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tries to lock each of them and, if it succeeds, spawns a thread to run
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the cron job (if it doesn't succeed, it means the job was already
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locked to be taken care of by another thread).
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The cursor used to lock the job in database is given to the worker
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thread (which has to close it itself).
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"""
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db = self.pool.db
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cr = db.cursor()
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db_name = db.dbname
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try:
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jobs = {} # mapping job ids to jobs for all jobs being processed.
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now = datetime.now()
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# Careful to compare timestamps with 'UTC' - everything is UTC as of v6.1.
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cr.execute("""SELECT * FROM ir_cron
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WHERE numbercall != 0
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AND active AND nextcall <= (now() at time zone 'UTC')
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ORDER BY priority""")
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for job in cr.dictfetchall():
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if not openerp.cron.get_thread_slots():
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break
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jobs[job['id']] = job
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task_cr = db.cursor()
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try:
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# Try to grab an exclusive lock on the job row from within the task transaction
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acquired_lock = False
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task_cr.execute("""SELECT *
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FROM ir_cron
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WHERE id=%s
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FOR UPDATE NOWAIT""",
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(job['id'],), log_exceptions=False)
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acquired_lock = True
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except psycopg2.OperationalError, e:
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if e.pgcode == '55P03':
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# Class 55: Object not in prerequisite state; 55P03: lock_not_available
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_logger.debug('Another process/thread is already busy executing job `%s`, skipping it.', job['name'])
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continue
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else:
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# Unexpected OperationalError
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raise
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finally:
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if not acquired_lock:
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# we're exiting due to an exception while acquiring the lot
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task_cr.close()
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# Got the lock on the job row, now spawn a thread to execute it in the transaction with the lock
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task_thread = threading.Thread(target=self._run_job, name=job['name'], args=(task_cr, job, now))
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# force non-daemon task threads (the runner thread must be daemon, and this property is inherited by default)
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task_thread.setDaemon(False)
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openerp.cron.take_thread_slot()
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task_thread.start()
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_logger.debug('Cron execution thread for job `%s` spawned', job['name'])
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# Find next earliest job ignoring currently processed jobs (by this and other cron threads)
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find_next_time_query = """SELECT min(nextcall) AS min_next_call
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FROM ir_cron WHERE numbercall != 0 AND active"""
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if jobs:
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cr.execute(find_next_time_query + " AND id NOT IN %s", (tuple(jobs.keys()),))
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else:
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cr.execute(find_next_time_query)
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next_call = cr.dictfetchone()['min_next_call']
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if next_call:
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next_call = calendar.timegm(time.strptime(next_call, DEFAULT_SERVER_DATETIME_FORMAT))
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else:
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# no matching cron job found in database, re-schedule arbitrarily in 1 day,
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# this delay will likely be modified when running jobs complete their tasks
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next_call = time.time() + (24*3600)
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openerp.cron.schedule_wakeup(next_call, db_name)
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except Exception, ex:
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_logger.warning('Exception in cron:', exc_info=True)
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finally:
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cr.commit()
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cr.close()
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def _process_job(self, cr, job):
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""" Run a given job taking care of the repetition.
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@ -365,19 +240,6 @@ class ir_cron(osv.osv):
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return False
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def update_running_cron(self, cr):
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""" Schedule as soon as possible a wake-up for this database. """
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# Verify whether the server is already started and thus whether we need to commit
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# immediately our changes and restart the cron agent in order to apply the change
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# immediately. The commit() is needed because as soon as the cron is (re)started it
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# will query the database with its own cursor, possibly before the end of the
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# current transaction.
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# This commit() is not an issue in most cases, but we must absolutely avoid it
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# when the server is only starting or loading modules (hence the test on pool._init).
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if not self.pool._init:
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cr.commit()
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openerp.cron.schedule_wakeup(WAKE_UP_NOW, self.pool.db.dbname)
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def _try_lock(self, cr, uid, ids, context=None):
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"""Try to grab a dummy exclusive write-lock to the rows with the given ids,
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to make sure a following write() or unlink() will not block due
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@ -393,20 +255,16 @@ class ir_cron(osv.osv):
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def create(self, cr, uid, vals, context=None):
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res = super(ir_cron, self).create(cr, uid, vals, context=context)
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self.update_running_cron(cr)
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return res
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def write(self, cr, uid, ids, vals, context=None):
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self._try_lock(cr, uid, ids, context)
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res = super(ir_cron, self).write(cr, uid, ids, vals, context=context)
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self.update_running_cron(cr)
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return res
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def unlink(self, cr, uid, ids, context=None):
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self._try_lock(cr, uid, ids, context)
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res = super(ir_cron, self).unlink(cr, uid, ids, context=context)
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self.update_running_cron(cr)
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return res
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ir_cron()
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# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
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@ -35,10 +35,6 @@ must be used.
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import deprecation
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# Maximum number of threads processing concurrently cron jobs.
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max_cron_threads = 4 # Actually the default value here is meaningless,
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# look at tools.config for the default value.
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# Paths to search for OpenERP addons.
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addons_paths = []
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215
openerp/cron.py
215
openerp/cron.py
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@ -1,215 +0,0 @@
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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##############################################################################
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#
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# OpenERP, Open Source Management Solution
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# Copyright (C) 2004-2011 OpenERP SA (<http://www.openerp.com>)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (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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#
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##############################################################################
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""" Cron jobs scheduling
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Cron jobs are defined in the ir_cron table/model. This module deals with all
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cron jobs, for all databases of a single OpenERP server instance.
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It defines a single master thread that will spawn (a bounded number of)
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threads to process individual cron jobs.
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The thread runs forever, checking every 60 seconds for new
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'database wake-ups'. It maintains a heapq of database wake-ups. At each
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wake-up, it will call ir_cron._run_jobs_multithread() for the given database. _run_jobs_multithread
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will check the jobs defined in the ir_cron table and spawn accordingly threads
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to process them.
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This module's behavior depends on the following configuration variable:
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openerp.conf.max_cron_threads.
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"""
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import heapq
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import logging
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import threading
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import time
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import openerp
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import tools
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_logger = logging.getLogger(__name__)
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# Heapq of database wake-ups. Note that 'database wake-up' meaning is in
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# the context of the cron management. This is not originally about loading
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# a database, although having the database name in the queue will
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# cause it to be loaded when the schedule time is reached, even if it was
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# unloaded in the mean time. Normally a database's wake-up is cancelled by
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# the RegistryManager when the database is unloaded - so this should not
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# cause it to be reloaded.
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#
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# TODO: perhaps in the future we could consider a flag on ir.cron jobs
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# that would cause database wake-up even if the database has not been
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# loaded yet or was already unloaded (e.g. 'force_db_wakeup' or something)
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#
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# Each element is a triple (timestamp, database-name, boolean). The boolean
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# specifies if the wake-up is canceled (so a wake-up can be canceled without
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# relying on the heapq implementation detail; no need to remove the job from
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# the heapq).
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_wakeups = []
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# Mapping of database names to the wake-up defined in the heapq,
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# so that we can cancel the wake-up without messing with the heapq
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# invariant: lookup the wake-up by database-name, then set
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# its third element to True.
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_wakeup_by_db = {}
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# Re-entrant lock to protect the above _wakeups and _wakeup_by_db variables.
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# We could use a simple (non-reentrant) lock if the runner function below
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# was more fine-grained, but we are fine with the loop owning the lock
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# while spawning a few threads.
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_wakeups_lock = threading.RLock()
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# Maximum number of threads allowed to process cron jobs concurrently. This
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# variable is set by start_master_thread using openerp.conf.max_cron_threads.
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_thread_slots = None
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# A (non re-entrant) lock to protect the above _thread_slots variable.
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_thread_slots_lock = threading.Lock()
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# Sleep duration limits - must not loop too quickly, but can't sleep too long
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# either, because a new job might be inserted in ir_cron with a much sooner
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# execution date than current known ones. We won't see it until we wake!
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MAX_SLEEP = 60 # 1 min
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MIN_SLEEP = 1 # 1 sec
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# Dummy wake-up timestamp that can be used to force a database wake-up asap
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WAKE_UP_NOW = 1
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def get_thread_slots():
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""" Return the number of available thread slots """
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return _thread_slots
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def release_thread_slot():
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""" Increment the number of available thread slots """
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global _thread_slots
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with _thread_slots_lock:
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_thread_slots += 1
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def take_thread_slot():
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""" Decrement the number of available thread slots """
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global _thread_slots
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with _thread_slots_lock:
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_thread_slots -= 1
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def cancel(db_name):
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""" Cancel the next wake-up of a given database, if any.
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:param db_name: database name for which the wake-up is canceled.
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"""
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_logger.debug("Cancel next wake-up for database '%s'.", db_name)
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with _wakeups_lock:
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if db_name in _wakeup_by_db:
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_wakeup_by_db[db_name][2] = True
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def cancel_all():
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""" Cancel all database wake-ups. """
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_logger.debug("Cancel all database wake-ups")
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global _wakeups
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global _wakeup_by_db
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with _wakeups_lock:
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_wakeups = []
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_wakeup_by_db = {}
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def schedule_wakeup(timestamp, db_name):
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""" Schedule a new wake-up for a database.
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If an earlier wake-up is already defined, the new wake-up is discarded.
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If another wake-up is defined, that wake-up is discarded and the new one
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is scheduled.
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:param db_name: database name for which a new wake-up is scheduled.
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:param timestamp: when the wake-up is scheduled.
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"""
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if not timestamp:
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return
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with _wakeups_lock:
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if db_name in _wakeup_by_db:
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task = _wakeup_by_db[db_name]
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if not task[2] and timestamp > task[0]:
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# existing wakeup is valid and occurs earlier than new one
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return
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task[2] = True # cancel existing task
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task = [timestamp, db_name, False]
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heapq.heappush(_wakeups, task)
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_wakeup_by_db[db_name] = task
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_logger.debug("Wake-up scheduled for database '%s' @ %s", db_name,
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'NOW' if timestamp == WAKE_UP_NOW else timestamp)
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def runner():
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"""Neverending function (intended to be run in a dedicated thread) that
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checks every 60 seconds the next database wake-up. TODO: make configurable
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"""
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while True:
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runner_body()
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def runner_body():
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with _wakeups_lock:
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while _wakeups and _wakeups[0][0] < time.time() and get_thread_slots():
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task = heapq.heappop(_wakeups)
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timestamp, db_name, canceled = task
|
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if canceled:
|
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continue
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del _wakeup_by_db[db_name]
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registry = openerp.pooler.get_pool(db_name)
|
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if not registry._init:
|
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_logger.debug("Database '%s' wake-up! Firing multi-threaded cron job processing", db_name)
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registry['ir.cron']._run_jobs_multithread()
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amount = MAX_SLEEP
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with _wakeups_lock:
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# Sleep less than MAX_SLEEP if the next known wake-up will happen before that.
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if _wakeups and get_thread_slots():
|
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amount = min(MAX_SLEEP, max(MIN_SLEEP, _wakeups[0][0] - time.time()))
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_logger.debug("Going to sleep for %ss", amount)
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time.sleep(amount)
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|
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def start_master_thread():
|
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""" Start the above runner function in a daemon thread.
|
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|
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The thread is a typical daemon thread: it will never quit and must be
|
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terminated when the main process exits - with no consequence (the processing
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threads it spawns are not marked daemon).
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|
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"""
|
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global _thread_slots
|
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_thread_slots = openerp.conf.max_cron_threads
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db_maxconn = tools.config['db_maxconn']
|
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if _thread_slots >= tools.config.get('db_maxconn', 64):
|
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_logger.warning("Connection pool size (%s) is set lower than max number of cron threads (%s), "
|
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"this may cause trouble if you reach that number of parallel cron tasks.",
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db_maxconn, _thread_slots)
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if _thread_slots:
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t = threading.Thread(target=runner, name="openerp.cron.master_thread")
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t.setDaemon(True)
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t.start()
|
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_logger.debug("Master cron daemon started!")
|
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else:
|
||||
_logger.info("No master cron daemon (0 workers needed).")
|
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|
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# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
|
|
@ -28,7 +28,6 @@ import threading
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|
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import openerp.sql_db
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import openerp.osv.orm
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import openerp.cron
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import openerp.tools
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import openerp.modules.db
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import openerp.tools.config
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|
@ -58,6 +57,9 @@ class Registry(object):
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self.db_name = db_name
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self.db = openerp.sql_db.db_connect(db_name)
|
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|
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# In monoprocess cron jobs flag (pooljobs)
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self.cron = False
|
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|
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# Inter-process signaling (used only when openerp.multi_process is True):
|
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# The `base_registry_signaling` sequence indicates the whole registry
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# must be reloaded.
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|
@ -124,7 +126,7 @@ class Registry(object):
|
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monitor the ir.cron model for future jobs. See openerp.cron for
|
||||
details.
|
||||
"""
|
||||
openerp.cron.schedule_wakeup(openerp.cron.WAKE_UP_NOW, self.db.dbname)
|
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self.cron = True
|
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|
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def clear_caches(self):
|
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""" Clear the caches
|
||||
|
|
|
@ -24,10 +24,11 @@ import logging
|
|||
import threading
|
||||
import time
|
||||
|
||||
import cron
|
||||
import netrpc_server
|
||||
import web_services
|
||||
import web_services
|
||||
|
||||
import openerp.cron
|
||||
import openerp.modules
|
||||
import openerp.netsvc
|
||||
import openerp.osv
|
||||
|
@ -83,8 +84,7 @@ def start_services():
|
|||
netrpc_server.init_servers()
|
||||
|
||||
# Start the main cron thread.
|
||||
if openerp.conf.max_cron_threads:
|
||||
openerp.cron.start_master_thread()
|
||||
cron.start_master_thread()
|
||||
|
||||
# Start the top-level servers threads (normally HTTP, HTTPS, and NETRPC).
|
||||
openerp.netsvc.Server.startAll()
|
||||
|
@ -95,8 +95,6 @@ def start_services():
|
|||
def stop_services():
|
||||
""" Stop all services. """
|
||||
# stop scheduling new jobs; we will have to wait for the jobs to complete below
|
||||
openerp.cron.cancel_all()
|
||||
|
||||
openerp.netsvc.Server.quitAll()
|
||||
openerp.service.wsgi_server.stop_server()
|
||||
_logger.info("Initiating shutdown")
|
||||
|
|
|
@ -0,0 +1,71 @@
|
|||
#!/usr/bin/env python
|
||||
# -*- coding: utf-8 -*-
|
||||
##############################################################################
|
||||
#
|
||||
# OpenERP, Open Source Management Solution
|
||||
# Copyright (C) 2004-2011 OpenERP SA (<http://www.openerp.com>)
|
||||
#
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Affero General Public License as
|
||||
# published by the Free Software Foundation, either version 3 of the
|
||||
# License, or (at your option) any later version.
|
||||
#
|
||||
# This program 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 Affero General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU Affero General Public License
|
||||
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
#
|
||||
##############################################################################
|
||||
|
||||
""" Cron jobs scheduling
|
||||
|
||||
Cron jobs are defined in the ir_cron table/model. This module deals with all
|
||||
cron jobs, for all databases of a single OpenERP server instance.
|
||||
|
||||
"""
|
||||
|
||||
import logging
|
||||
import threading
|
||||
import time
|
||||
|
||||
import openerp
|
||||
|
||||
_logger = logging.getLogger(__name__)
|
||||
|
||||
SLEEP_INTERVAL = 60 # 1 min
|
||||
|
||||
def cron_runner(number):
|
||||
while True:
|
||||
time.sleep(SLEEP_INTERVAL + number) # Steve Reich timing style
|
||||
registries = openerp.modules.registry.RegistryManager.registries
|
||||
_logger.debug('cron%d polling for jobs', number)
|
||||
for db_name, registry in registries.items():
|
||||
while True and registry.cron:
|
||||
# acquired = openerp.addons.base.ir.ir_cron.ir_cron._acquire_job(db_name)
|
||||
# TODO why isnt openerp.addons.base defined ?
|
||||
import sys
|
||||
base = sys.modules['addons.base']
|
||||
acquired = base.ir.ir_cron.ir_cron._acquire_job(db_name)
|
||||
if not acquired:
|
||||
break
|
||||
|
||||
def start_master_thread():
|
||||
""" Start the above runner function in a daemon thread.
|
||||
|
||||
The thread is a typical daemon thread: it will never quit and must be
|
||||
terminated when the main process exits - with no consequence (the processing
|
||||
threads it spawns are not marked daemon).
|
||||
|
||||
"""
|
||||
for i in range(openerp.tools.config['max_cron_threads']):
|
||||
def target():
|
||||
cron_runner(i)
|
||||
t = threading.Thread(target=target, name="openerp.service.cron.cron_runner%d" % i)
|
||||
t.setDaemon(True)
|
||||
t.start()
|
||||
_logger.debug("cron%d started!" % i)
|
||||
|
||||
# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
|
|
@ -269,7 +269,7 @@ class configmanager(object):
|
|||
"osv_memory tables. This is a decimal value expressed in hours, "
|
||||
"and the default is 1 hour.",
|
||||
type="float")
|
||||
group.add_option("--max-cron-threads", dest="max_cron_threads", my_default=4,
|
||||
group.add_option("--max-cron-threads", dest="max_cron_threads", my_default=2,
|
||||
help="Maximum number of threads processing concurrently cron jobs.",
|
||||
type="int")
|
||||
group.add_option("--unaccent", dest="unaccent", my_default=False, action="store_true",
|
||||
|
@ -479,8 +479,6 @@ class configmanager(object):
|
|||
if opt.save:
|
||||
self.save()
|
||||
|
||||
openerp.conf.max_cron_threads = self.options['max_cron_threads']
|
||||
|
||||
openerp.conf.addons_paths = self.options['addons_path'].split(',')
|
||||
if opt.server_wide_modules:
|
||||
openerp.conf.server_wide_modules = map(lambda m: m.strip(), opt.server_wide_modules.split(','))
|
||||
|
|
Loading…
Reference in New Issue