apppublic/appPublic/workers.py

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5.9 KiB
Python
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2019-07-16 16:33:07 +08:00
import os
import sys
import time
import pyodbc as db
from multiprocessing import Process, Queue,Pipe,freeze_support,cpu_count
from threading import Thread
import logging
from appPublic.folderUtils import ProgramPath
FINISH_JOB=0
EXIT=4
ABORT_JOB=5
COMMIT_JOB=6
DO_JOB=1
ERROR=2
OK=0
def debug(s):
fn = os.path.join(ProgramPath(),"worker_child.log")
f = open(fn,"a")
f.write("%s\n" % s)
f.close()
pass #print s
logger = logging.getLogger(__name__)
class Worker(Process):
def __init__(self,inQ,outQ):
Process.__init__(self)
self.inQ = inQ
self.outQ = outQ
self.done = False
self.aborted = False
self.task_no = 0
def abort_task(self):
pass
def finish_task(self):
pass
def job_begin(self):
pass
def job_end(self):
pass
def abort(self):
self.aborted = True
def run(self):
self.job_begin()
self.job()
if self.aborted:
self.abort_task()
self.outQ.put([ABORT_JOB,self.name,self.task_no,None])
debug("process=%s,aborted at task_no=%d" % (self.name,self.task_no))
#self.inQ.cancel_join_thread()
else:
self.finish_task()
self.outQ.put([FINISH_JOB,self.name,self.task_no,None])
debug("process=%s,end at task_no=%d" % (self.name,self.task_no))
self.job_end()
debug("process %s end" % self.name)
sys.exit(0)
def job(self):
debug("process %s running" % (self.name))
while not self.done:
cmd,task_no,args = self.inQ.get()
self.task_no = task_no
debug("process=%s,cmd=%d,task_no=%d" % (self.name,cmd,self.task_no))
if cmd==ABORT_JOB:
logger.info("process %s aborted" % self.name)
self.aborted = True
self.done = True
continue
if cmd==FINISH_JOB:
logger.info("process %s finished" % self.name)
self.done = True
continue
if cmd!=DO_JOB:
continue
try:
d = self.task(args)
self.outQ.put([cmd,self.name,self.task_no,d])
debug("process=%s,cmd=%d,task_no=%d,responed" % (self.name,cmd,self.task_no))
except Exception as e:
debug("ERROR:%s" % e)
self.outQ.put([ERROR,self.name,self.task_no,"Error"])
debug("process=%s,cmd=%d,task_no=%d,error" % (self.name,cmd,self.task_no))
self.abort()
def task(self,args):
return None
class Workers(Thread):
def __init__(self,worker_cnt,Wklass,argv):
Thread.__init__(self)
self.worker_cnt = worker_cnt
self.aborted = False
self.workers = []
self.taskQ = Queue()
self.doneQ = Queue()
self.follows = []
self.task_cnt = 0
self.resp_cnt = 0
self.task_no = 0
self.max_task_no_resp = 0
i = 0
while i < self.worker_cnt:
w = Wklass(self.taskQ,self.doneQ,*argv)
self.workers.append(w)
w.start()
i += 1
def __del__(self):
self.cleanTaskQ()
self.cleanDoneQ()
self.taskQ.close()
self.doneQ.close()
def eraseDeadProcess(self):
d = [ p for p in self.workers if p.is_alive() ]
self.workers = d
self.worker_cnt = len(d)
def addFollowWorkers(self,workers):
self.follows.append(workers)
def isFollowDone(self):
for w in self.follows:
if not w.isDone():
#logger.info("%s, follow %s still alive" % (self.name,w.name))
return False
return True
def isFinished(self):
for w in self.workers:
if w.is_alive():
#logger.info("%s, process %s still alive" % (self.name,w.name))
return False
return True
def isDone(self):
if not self.isFollowDone():
return False
if not self.isFinished():
return False
return True
def isAborted(self):
return self.aborted
def run(self):
while not self.isFinished():
#logger.info("thread %s, task_cnt=%d,resp_cnt = %d,aborted=%s" % (self.name,self.task_cnt,self.resp_cnt,str(self.aborted)))
status,proName,task_no,data = self.getResult()
if status is not None:
self.handleResult(status,proName,data)
for w in self.follows:
if w.isAborted():
self.abortTask()
self.eraseDeadProcess()
#time.sleep(0.01)
logger.info("thread %s end .................." % (self.name))
def handleResult(self,status,proName,data):
#logger.info("thread=%s,status=%s,proName=%s" % (self.name,str(status),proName))
if status == FINISH_JOB or status == ABORT_JOB:
for p in self.workers:
if p.name == proName and p.is_alive():
p.join()
#logger.info("%s,finished job,status=%d" % (self.name,status))
return
if status == ERROR and not self.aborted:
#logger.info("thread %s, error" % (self.name))
self.abortTask()
logger.info("%s,error job,status=%d" % (self.name,status))
return
if status == DO_JOB:
self.resp_cnt += 1
for i in self.follows:
#logger.info("task hand to %s" % (i.name))
i.addTask(data,waitting=True)
def done(self):
while self.max_task_no_resp < self.task_no:
self.eraseDeadProcess()
if self.worker_cnt == 0:
return
time.sleep(0.01)
for w in self.workers:
self.task_no += 1
self.taskQ.put([FINISH_JOB,self.task_no,None],False)
for w in self.follows:
w.done()
def addTask(self,args,waitting=False):
try:
if self.isAborted():
return False
self.task_no += 1
self.taskQ.put([DO_JOB,self.task_no,args],waitting)
self.task_cnt += 1
return True
except Exception as e:
logger.info("thread (%s)error:%s" % (self.name,mstr(e)))
return False
def abortTask(self):
if self.aborted:
return
self.aborted = True
self.cleanTaskQ()
for w in self.workers:
self.task_no += 1
self.taskQ.put([ABORT_JOB,self.task_no,None],False)
for w in self.follows:
w.abortTask()
def cleanTaskQ(self):
r = True
while r:
try:
self.taskQ.get(False)
except:
r = False
def cleanDoneQ(self):
r = True
while r:
try:
self.doneQ.get(False)
except:
r = False
def getResult(self,waitting=True):
try:
status,proName,task_no,data = self.doneQ.get(waitting)
if task_no > self.max_task_no_resp:
self.max_task_no_resp = task_no
#logger.info("%s status=%s,%s,%d" % (self.name,str(status),proName,task_no))
return (status,proName,task_no,data)
except Exception as e:
logger.info("thread %s error:%s" % (self.name,str(e)))
return None,None,None,None