mirror of https://gitlab.com/bashrc2/epicyon
143 lines
4.1 KiB
Python
143 lines
4.1 KiB
Python
__filename__="threads.py"
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__author__="Bob Mottram"
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__license__="AGPL3+"
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__version__="1.1.0"
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__maintainer__="Bob Mottram"
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__email__="bob@freedombone.net"
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__status__="Production"
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import threading
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import os
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import sys
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import trace
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import time
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import datetime
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class threadWithTrace(threading.Thread):
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def __init__(self, *args, **keywords):
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self.startTime=datetime.datetime.utcnow()
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self.isStarted=False
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tries=0
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while tries<3:
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try:
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self._args,self._keywords=args,keywords
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threading.Thread.__init__(self,*self._args,**self._keywords)
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self.killed=False
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break
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except Exception as e:
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print('ERROR: threads.py/__init__ failed - '+str(e))
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time.sleep(1)
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tries+=1
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def start(self):
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tries=0
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while tries<3:
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try:
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self.__run_backup=self.run
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self.run=self.__run
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threading.Thread.start(self)
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break
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except Exception as e:
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print('ERROR: threads.py/start failed - '+str(e))
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time.sleep(1)
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tries+=1
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# note that this is set True even if all tries failed
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self.isStarted=True
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def __run(self):
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sys.settrace(self.globaltrace)
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self.__run_backup()
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self.run=self.__run_backup
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def globaltrace(self, frame, event, arg):
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if event == 'call':
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return self.localtrace
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else:
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return None
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def localtrace(self, frame, event, arg):
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if self.killed:
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if event == 'line':
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raise SystemExit()
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return self.localtrace
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def kill(self):
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self.killed=True
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def clone(self,fn):
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return threadWithTrace(target=fn, \
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args=self._args, \
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daemon=True)
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def removeDormantThreads(baseDir: str,threadsList: [],debug: bool) -> None:
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"""Removes threads whose execution has completed
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"""
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if len(threadsList)==0:
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return
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dormantThreads=[]
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currTime=datetime.datetime.utcnow()
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changed=False
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# which threads are dormant?
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noOfActiveThreads=0
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for th in threadsList:
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removeThread=False
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if th.isStarted:
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if not th.is_alive():
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if (currTime-th.startTime).total_seconds()>10:
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if debug:
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print('DEBUG: thread is not alive ten seconds after start')
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removeThread=True
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# timeout for started threads
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if (currTime-th.startTime).total_seconds()>600:
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if debug:
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print('DEBUG: started thread timed out')
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removeThread=True
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else:
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# timeout for threads which havn't been started
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if (currTime-th.startTime).total_seconds()>600:
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if debug:
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print('DEBUG: unstarted thread timed out')
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removeThread=True
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if removeThread:
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dormantThreads.append(th)
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else:
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noOfActiveThreads+=1
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if debug:
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print('DEBUG: '+str(noOfActiveThreads) + ' active threads out of '+str(len(threadsList)))
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# remove the dormant threads
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dormantCtr=0
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for th in dormantThreads:
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if debug:
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print('DEBUG: Removing dormant thread '+str(dormantCtr))
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dormantCtr+=1
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threadsList.remove(th)
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th.kill()
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changed=True
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# start scheduled threads
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if len(threadsList)<10:
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ctr=0
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for th in threadsList:
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if not th.isStarted:
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print('Starting new send thread '+str(ctr))
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th.start()
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changed=True
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break
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ctr+=1
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if not changed:
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return
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if debug:
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sendLogFilename=baseDir+'/send.csv'
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try:
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with open(sendLogFilename, "a+") as logFile:
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logFile.write(currTime.strftime("%Y-%m-%dT%H:%M:%SZ")+','+str(noOfActiveThreads)+','+str(len(threadsList))+'\n')
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except:
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pass
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