PNG  IHDRxsBIT|d pHYs+tEXtSoftwarewww.inkscape.org<,tEXtComment File Manager

File Manager

Path: /opt/alt/python27/lib/python2.7/site-packages/postomaat/

Viewing File: threadpool.py

#   Copyright 2009-2018 Oli Schacher
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
#
import threading
import time
import weakref
try:
    import queue
except ImportError:
    import Queue as queue
import logging
import postomaat.core
from postomaat.scansession import SessionHandler


class ThreadPool(threading.Thread):

    def __init__(self, controller, minthreads=1, maxthreads=20, queuesize=100):
        self.workers = []
        self.queuesize = queuesize
        self.tasks = queue.Queue(queuesize)
        self.minthreads = minthreads
        self.maxthreads = maxthreads
        assert self.minthreads > 0
        assert self.maxthreads >= self.minthreads

        self.logger = logging.getLogger('%s.threadpool' % __package__)
        self.threadlistlock = threading.Lock()
        self.checkinterval = 10
        self.threadcounter = 0
        self._stayalive = True
        self.laststats = 0
        self.statinverval = 60
        self.controller = weakref.ref(controller)  # keep a weak reference to controller
        threading.Thread.__init__(self)
        self.name = 'Threadpool'
        self.daemon = False
        self.start()

    @property
    def stayalive(self):
        return self._stayalive

    @stayalive.setter
    def stayalive(self, value):
        # threadpool is shut down -> send poison pill to workers
        if self._stayalive and not value:
            self._stayalive = False
            self._send_poison_pills()
        self._stayalive = value

    def _send_poison_pills(self):
        """flood the queue with poison pills to tell all workers to shut down"""
        for _ in range(self.maxthreads):
            self.tasks.put_nowait(None)

    def add_task(self, session):
        if self._stayalive:
            self.tasks.put(session)

    def add_task_from_socket(self, sock, port):
        """
        Consistent interface with procpool
        Add task to queue compressing the socket which is needed for multiprocessing

        Args:
            sock (socket): incoming socket
            port (int): port where message was received (needed for plugin list)
        """
        task = (postomaat.core.forking_dumps(sock), port)
        self.add_task(task)

    def get_task_sessionhandler(self):
        if self._stayalive:
            task = self.tasks.get(True)
            if task is None:
                return None
            psock, port = task
            sock = postomaat.core.forking_load(psock)
            return SessionHandler(sock, self.controller().config, self.controller().plugin_list_by_port(port))
        else:
            return None

    def run(self):
        self.logger.debug('Threadpool initializing. minthreads=%s maxthreads=%s maxqueue=%s checkinterval=%s' % (
            self.minthreads, self.maxthreads, self.queuesize, self.checkinterval))

        while self._stayalive:
            curthreads = self.workers
            numthreads = len(curthreads)

            # check the minimum boundary
            requiredminthreads = self.minthreads
            if numthreads < requiredminthreads:
                diff = requiredminthreads - numthreads
                self._add_worker(diff)
                continue

            # check the maximum boundary
            if numthreads > self.maxthreads:
                diff = numthreads - self.maxthreads
                self._remove_worker(diff)
                continue

            changed = False
            # ok, we are within the boundaries, now check if we can dynamically
            # adapt something
            queuesize = self.tasks.qsize()

            # if there are more tasks than current number of threads, we try to
            # increase
            workload = float(queuesize) / float(numthreads)

            if workload > 1 and numthreads < self.maxthreads:
                self._add_worker()
                numthreads += 1
                changed = True

            if workload < 1 and numthreads > self.minthreads:
                self._remove_worker()
                numthreads -= 1
                changed = True

            # log current stats
            if changed or time.time() - self.laststats > self.statinverval:
                workerlist = "\n%s" % '\n'.join(map(repr, self.workers))
                self.logger.debug('queuesize=%s workload=%.2f workers=%s workerlist=%s' % (
                    queuesize, workload, numthreads, workerlist))
                self.laststats = time.time()

            time.sleep(self.checkinterval)

        self.logger.info('Threadpool shut down')

    def _remove_worker(self, num=1):
        self.logger.debug('Removing %s workerthread(s)' % num)
        for bla in range(0, num):
            worker = self.workers[0]
            worker.stayalive = False
            worker.join(120)
            del self.workers[0]

    def _add_worker(self, num=1):
        self.logger.debug('Adding %s workerthread(s)' % num)
        for bla in range(0, num):
            self.threadcounter += 1
            worker = Worker("[%s]" % self.threadcounter, self)
            self.workers.append(worker)
            worker.start()

    def shutdown(self, newmanager=None):
        """
        Shutdown manager, transfer queue to a new manager if available. Otherwise
        mark messages as defer.

        Keyword Args:
            newmanager (ProcManager or ThreadPool): has to provide add_task accepting a pickled socket
        """

        # set stayalive to False, this will send
        # poison pills to the workers
        self.stayalive = False


        # now remove elements from the queue
        # first, put another poison pill for the Threadpool itself
        self.tasks.put_nowait(None)

        if newmanager:
            # new manager available. Transfer tasks
            # to new manager
            countmessages = 0
            while True:
                # don't use the get_task_sessionhandler from Threadpool since this will
                # not give anything once stayalive is False
                task = self.tasks.get(True)
                if task is None:  # poison pill
                    break
                newmanager.add_task(task)
                countmessages += 1
            self.logger.info("Moved %u messages to queue of new manager" % countmessages)
        else:
            # no new manager. Mark messages as defer.
            returnMessage = "Temporarily unavailable... Please try again later."
            markDeferCounter = 0
            while True:
                # don't use the get_task_sessionhandler from Threadpool since this will
                # not give anything once stayalive is False
                sesshandler = self.tasks.get(True)
                if sesshandler == None:  # poison pill -> shut down
                    break
                markDeferCounter += 1
                sesshandler.protohandler.defer(returnMessage)
            self.logger.info("Marked %s messages as '%s' to close queue" % (markDeferCounter,returnMessage))

        # remove all the workers (joins them also)
        for worker in self.workers:
            worker.stayalive = False
            worker.join(120) # wait 120 seconds max

class Worker(threading.Thread):

    def __init__(self, workerid, pool):
        threading.Thread.__init__(self, name='Pool worker %s' % workerid)
        self.workerid = workerid
        self.birth = time.time()
        self.pool = pool
        self.stayalive = True
        self.logger = logging.getLogger('%s.threads.worker.%s' % (__package__, workerid))
        self.logger.debug('thread init')
        self.noisy = False
        self.setDaemon(False)
        self.workerstate = 'created'

    def __repr__(self):
        return "%s: %s" % (self.workerid, self.workerstate)

    def run(self):
        self.logger.debug('thread start')

        while self.stayalive:
            self.workerstate = 'waiting for task'
            if self.noisy:
                self.logger.debug('Getting new task...')
            sesshandler = self.pool.get_task_sessionhandler()
            if sesshandler == None:  # poison pill -> shut down
                if self.noisy:
                    self.logger.debug("got a poison pill .. good bye world")
                self.stayalive = False
                continue

            if self.noisy:
                self.logger.debug('Doing work')
            try:
                sesshandler.handlesession(self)
            except Exception as e:
                self.logger.error('Unhandled Exception : %s' % e)
            self.workerstate = 'task completed'

        self.workerstate = 'ending'
        self.logger.debug('thread end')
b IDATxytVսϓ22 A@IR :hCiZ[v*E:WũZA ^dQeQ @ !jZ'>gsV仿$|?g)&x-EIENT ;@xT.i%-X}SvS5.r/UHz^_$-W"w)Ɗ/@Z &IoX P$K}JzX:;` &, ŋui,e6mX ԵrKb1ԗ)DADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADADA݀!I*]R;I2$eZ#ORZSrr6mteffu*((Pu'v{DIߔ4^pIm'77WEEE;vƎ4-$]'RI{\I&G :IHJ DWBB=\WR޽m o$K(V9ABB.}jѢv`^?IOȅ} ڶmG}T#FJ`56$-ھ}FI&v;0(h;Б38CӧOWf!;A i:F_m9s&|q%=#wZprrrla A &P\\СC[A#! {olF} `E2}MK/vV)i{4BffV\|ۭX`b@kɶ@%i$K z5zhmX[IXZ` 'b%$r5M4º/l ԃߖxhʔ)[@=} K6IM}^5k㏷݆z ΗÿO:gdGBmyT/@+Vɶ纽z񕏵l.y޴it뭷zV0[Y^>Wsqs}\/@$(T7f.InݺiR$푔n.~?H))\ZRW'Mo~v Ov6oԃxz! S,&xm/yɞԟ?'uaSѽb,8GלKboi&3t7Y,)JJ c[nzӳdE&KsZLӄ I?@&%ӟ۶mSMMњ0iؐSZ,|J+N ~,0A0!5%Q-YQQa3}$_vVrf9f?S8`zDADADADADADADADADAdqP,تmMmg1V?rSI꒟]u|l RCyEf٢9 jURbztѰ!m5~tGj2DhG*{H9)꒟ר3:(+3\?/;TUݭʴ~S6lڧUJ*i$d(#=Yݺd{,p|3B))q:vN0Y.jkק6;SɶVzHJJЀ-utѹսk>QUU\޲~]fFnK?&ߡ5b=z9)^|u_k-[y%ZNU6 7Mi:]ۦtk[n X(e6Bb."8cۭ|~teuuw|ήI-5"~Uk;ZicEmN/:]M> cQ^uiƞ??Ңpc#TUU3UakNwA`:Y_V-8.KKfRitv޲* 9S6ֿj,ՃNOMߤ]z^fOh|<>@Å5 _/Iu?{SY4hK/2]4%it5q]GGe2%iR| W&f*^]??vq[LgE_3f}Fxu~}qd-ږFxu~I N>\;͗O֊:̗WJ@BhW=y|GgwܷH_NY?)Tdi'?խwhlmQi !SUUsw4kӺe4rfxu-[nHtMFj}H_u~w>)oV}(T'ebʒv3_[+vn@Ȭ\S}ot}w=kHFnxg S 0eޢm~l}uqZfFoZuuEg `zt~? b;t%>WTkķh[2eG8LIWx,^\thrl^Ϊ{=dž<}qV@ ⠨Wy^LF_>0UkDuʫuCs$)Iv:IK;6ֲ4{^6եm+l3>݆uM 9u?>Zc }g~qhKwڭeFMM~pМuqǿz6Tb@8@Y|jx](^]gf}M"tG -w.@vOqh~/HII`S[l.6nØXL9vUcOoB\xoǤ'T&IǍQw_wpv[kmO{w~>#=P1Pɞa-we:iǏlHo׈꒟f9SzH?+shk%Fs:qVhqY`jvO'ρ?PyX3lх]˾uV{ݞ]1,MzYNW~̈́ joYn}ȚF߾׮mS]F z+EDxm/d{F{-W-4wY듏:??_gPf ^3ecg ҵs8R2מz@TANGj)}CNi/R~}c:5{!ZHӋӾ6}T]G]7W6^n 9*,YqOZj:P?Q DFL|?-^.Ɵ7}fFh׶xe2Pscz1&5\cn[=Vn[ĶE鎀uˌd3GII k;lNmشOuuRVfBE]ۣeӶu :X-[(er4~LHi6:Ѻ@ԅrST0trk%$Č0ez" *z"T/X9|8.C5Feg}CQ%͞ˣJvL/?j^h&9xF`њZ(&yF&Iݻfg#W;3^{Wo^4'vV[[K';+mӍִ]AC@W?1^{එyh +^]fm~iԵ]AB@WTk̏t uR?l.OIHiYyԶ]Aˀ7c:q}ힽaf6Z~қm(+sK4{^6}T*UUu]n.:kx{:2 _m=sAߤU@?Z-Vކеz왍Nэ{|5 pڶn b p-@sPg]0G7fy-M{GCF'%{4`=$-Ge\ eU:m+Zt'WjO!OAF@ik&t݆ϥ_ e}=]"Wz_.͜E3leWFih|t-wZۍ-uw=6YN{6|} |*={Ѽn.S.z1zjۻTH]흾 DuDvmvK.`V]yY~sI@t?/ϓ. m&["+P?MzovVЫG3-GRR[(!!\_,^%?v@ҵő m`Y)tem8GMx.))A]Y i`ViW`?^~!S#^+ѽGZj?Vģ0.))A꨷lzL*]OXrY`DBBLOj{-MH'ii-ϰ ok7^ )쭡b]UXSְmռY|5*cֽk0B7镹%ڽP#8nȎq}mJr23_>lE5$iwui+ H~F`IjƵ@q \ @#qG0".0" l`„.0! ,AQHN6qzkKJ#o;`Xv2>,tێJJ7Z/*A .@fفjMzkg @TvZH3Zxu6Ra'%O?/dQ5xYkU]Rֽkق@DaS^RSּ5|BeHNN͘p HvcYcC5:y #`οb;z2.!kr}gUWkyZn=f Pvsn3p~;4p˚=ē~NmI] ¾ 0lH[_L hsh_ғߤc_њec)g7VIZ5yrgk̞W#IjӪv>՞y睝M8[|]\շ8M6%|@PZڨI-m>=k='aiRo-x?>Q.}`Ȏ:Wsmu u > .@,&;+!!˱tﭧDQwRW\vF\~Q7>spYw$%A~;~}6¾ g&if_=j,v+UL1(tWake:@Ș>j$Gq2t7S?vL|]u/ .(0E6Mk6hiۺzښOrifޱxm/Gx> Lal%%~{lBsR4*}{0Z/tNIɚpV^#Lf:u@k#RSu =S^ZyuR/.@n&΃z~B=0eg뺆#,Þ[B/?H uUf7y Wy}Bwegל`Wh(||`l`.;Ws?V@"c:iɍL֯PGv6zctM̠':wuW;d=;EveD}9J@B(0iհ bvP1{\P&G7D޴Iy_$-Qjm~Yrr&]CDv%bh|Yzni_ˆR;kg}nJOIIwyuL}{ЌNj}:+3Y?:WJ/N+Rzd=hb;dj͒suݔ@NKMԄ jqzC5@y°hL m;*5ezᕏ=ep XL n?מ:r`۵tŤZ|1v`V뽧_csج'ߤ%oTuumk%%%h)uy]Nk[n 'b2 l.=͜E%gf$[c;s:V-͞WߤWh-j7]4=F-X]>ZLSi[Y*We;Zan(ӇW|e(HNNP5[= r4tP &0<pc#`vTNV GFqvTi*Tyam$ߏWyE*VJKMTfFw>'$-ؽ.Ho.8c"@DADADADADADADADADA~j*֘,N;Pi3599h=goضLgiJ5փy~}&Zd9p֚ e:|hL``b/d9p? fgg+%%hMgXosج, ΩOl0Zh=xdjLmhݻoO[g_l,8a]٭+ӧ0$I]c]:粹:Teꢢ"5a^Kgh,&= =՟^߶“ߢE ܹS J}I%:8 IDAT~,9/ʃPW'Mo}zNƍ쨓zPbNZ~^z=4mswg;5 Y~SVMRXUյڱRf?s:w ;6H:ºi5-maM&O3;1IKeamZh͛7+##v+c ~u~ca]GnF'ټL~PPPbn voC4R,ӟgg %hq}@#M4IÇ Oy^xMZx ) yOw@HkN˖-Sǎmb]X@n+i͖!++K3gd\$mt$^YfJ\8PRF)77Wא!Cl$i:@@_oG I{$# 8磌ŋ91A (Im7֭>}ߴJq7ޗt^ -[ԩSj*}%]&' -ɓ'ꫯVzzvB#;a 7@GxI{j޼ƌ.LÇWBB7`O"I$/@R @eee@۷>}0,ɒ2$53Xs|cS~rpTYYY} kHc %&k.], @ADADADADADADADADA@lT<%''*Lo^={رc5h %$+CnܸQ3fҥK}vUVVs9G R,_{xˇ3o߾;TTTd}馛]uuuG~iԩ@4bnvmvfϞ /Peeeq}}za I~,誫{UWW뮻}_~YƍSMMMYχ֝waw\ďcxꩧtEƍկ_?۷5@u?1kNׯWzz/wy>}zj3 k(ٺuq_Zvf̘:~ ABQ&r|!%KҥKgԞ={<_X-z !CyFUUz~ ABQIIIjݺW$UXXDٳZ~ ABQƍecW$<(~<RSSvZujjjԧOZQu@4 8m&&&jԩg$ď1h ͟?_{768@g =@`)))5o6m3)ѣƌJ;wҿUTT /KZR{~a=@0o<*狔iFɶ[ˎ;T]]OX@?K.ۈxN pppppppppppppppppPfl߾] ,{ァk۶mڿo5BTӦMӴiӴ|r DB2e|An!Dy'tkΝ[A $***t5' "!駟oaDnΝ:t֭[gDШQ06qD;@ x M6v(PiizmZ4ew"@̴ixf [~-Fٱc&IZ2|n!?$@{[HTɏ#@hȎI# _m(F /6Z3z'\r,r!;w2Z3j=~GY7"I$iI.p_"?pN`y DD?: _  Gÿab7J !Bx@0 Bo cG@`1C[@0G @`0C_u V1 aCX>W ` | `!<S `"<. `#c`?cAC4 ?c p#~@0?:08&_MQ1J h#?/`7;I  q 7a wQ A 1 Hp !#<8/#@1Ul7=S=K.4Z?E_$i@!1!E4?`P_  @Bă10#: "aU,xbFY1 [n|n #'vEH:`xb #vD4Y hi.i&EΖv#O H4IŶ}:Ikh @tZRF#(tXҙzZ ?I3l7q@õ|ۍ1,GpuY Ꮿ@hJv#xxk$ v#9 5 }_$c S#=+"K{F*m7`#%H:NRSp6I?sIՖ{Ap$I$I:QRv2$Z @UJ*$]<FO4IENDB`