132 lines
4.3 KiB
Python
132 lines
4.3 KiB
Python
from Worker import Worker
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import gevent, time, logging
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MAX_WORKERS = 10
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# Worker manager for site
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class WorkerManager:
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def __init__(self, site):
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self.site = site
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self.workers = {} # Key: ip:port, Value: Worker.Worker
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self.tasks = [] # {"evt": evt, "workers_num": 0, "site": self.site, "inner_path": inner_path, "done": False, "time_start": time.time(), "peers": peers}
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self.log = logging.getLogger("WorkerManager:%s" % self.site.address_short)
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self.process_taskchecker = gevent.spawn(self.checkTasks)
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# Check expired tasks
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def checkTasks(self):
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while 1:
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time.sleep(15) # Check every 30 sec
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if not self.tasks: continue
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tasks = self.tasks[:] # Copy it so removing elements wont cause any problem
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for task in tasks:
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if time.time() >= task["time_start"]+60: # Task timed out
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self.log.debug("Cleaning up task: %s" % task)
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# Clean up workers
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workers = self.findWorkers(task)
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for worker in workers:
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worker.stop()
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# Remove task
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self.failTask(task)
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elif time.time() >= task["time_start"]+15: # Task taking long time
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self.log.debug("Task taking long time, find more peers: %s" % task["inner_path"])
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task["site"].announce() # Find more peers
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if task["peers"]: # Release the peer olck
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self.log.debug("Task peer lock release: %s" % task["inner_path"])
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task["peers"] = []
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self.startWorkers()
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continue # One reannounce per loop
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# Returns the next free or less worked task
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def getTask(self, peer, only_free=False):
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best_task = None
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for task in self.tasks: # Find out the task with lowest worker number
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if task["peers"] and peer not in task["peers"]: continue # This peer not allowed to pick this task
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if task["inner_path"] == "content.json": return task # Content.json always prority
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if not best_task or task["workers_num"] < best_task["workers_num"]: # If task has lower worker number then its better
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best_task = task
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return best_task
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# New peers added to site
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def onPeers(self):
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self.startWorkers()
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# Start workers to process tasks
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def startWorkers(self):
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if len(self.workers) >= MAX_WORKERS: return False # Workers number already maxed
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if not self.tasks: return False # No task for workers
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for key, peer in self.site.peers.iteritems(): # One worker for every peer
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if key not in self.workers and len(self.workers) < MAX_WORKERS: # We dont have worker for that peer and workers num less than max
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worker = Worker(self, peer)
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self.workers[key] = worker
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worker.key = key
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worker.start()
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self.log.debug("Added worker: %s, workers: %s/%s" % (key, len(self.workers), MAX_WORKERS))
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# Find workers by task
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def findWorkers(self, task):
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workers = []
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for worker in self.workers.values():
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if worker.task == task: workers.append(worker)
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return workers
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# Ends and remove a worker
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def removeWorker(self, worker):
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worker.running = False
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del(self.workers[worker.key])
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self.log.debug("Removed worker, workers: %s/%s" % (len(self.workers), MAX_WORKERS))
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# Create new task and return asyncresult
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def addTask(self, inner_path, peer=None):
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self.site.onFileStart(inner_path) # First task, trigger site download started
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task = self.findTask(inner_path)
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if task: # Already has task for that file
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if peer and task["peers"]: # This peer has new version too
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task["peers"].append(peer)
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self.startWorkers()
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return task["evt"]
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else: # No task for that file yet
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evt = gevent.event.AsyncResult()
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if peer:
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peers = [peer] # Only download from this peer
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else:
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peers = None
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task = {"evt": evt, "workers_num": 0, "site": self.site, "inner_path": inner_path, "done": False, "time_start": time.time(), "peers": peers}
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self.tasks.append(task)
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self.log.debug("New task: %s" % task)
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self.startWorkers()
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return evt
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# Find a task using inner_path
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def findTask(self, inner_path):
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for task in self.tasks:
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if task["inner_path"] == inner_path:
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return task
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return None # Not found
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# Mark a task failed
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def failTask(self, task):
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task["done"] = True
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self.tasks.remove(task) # Remove from queue
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self.site.onFileFail(task["inner_path"])
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task["evt"].set(False)
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# Mark a task done
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def doneTask(self, task):
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task["done"] = True
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self.tasks.remove(task) # Remove from queue
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self.site.onFileDone(task["inner_path"])
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task["evt"].set(True)
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if not self.tasks: self.site.onComplete() # No more task trigger site compelte
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