2017-01-10 21:15:35 +01:00
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import collections
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2017-05-27 19:03:27 +02:00
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from importlib import import_module
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2017-01-19 19:48:12 +01:00
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from threading import current_thread, enumerate as threadingEnumerate, RLock
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2017-03-19 22:08:00 +01:00
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import Queue
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2017-01-10 21:15:35 +01:00
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import time
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2017-05-27 19:03:27 +02:00
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import sys
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2017-01-10 21:15:35 +01:00
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2017-05-27 19:03:27 +02:00
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from bmconfigparser import BMConfigParser
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2017-01-10 21:15:35 +01:00
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from helper_sql import *
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from singleton import Singleton
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2017-05-27 19:03:27 +02:00
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# TODO make this dynamic, and watch out for frozen, like with messagetypes
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import storage.sqlite
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import storage.filesystem
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2017-01-10 21:15:35 +01:00
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@Singleton
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2017-05-27 19:03:27 +02:00
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class Inventory():
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2017-01-10 21:15:35 +01:00
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def __init__(self):
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2017-05-27 19:03:27 +02:00
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#super(self.__class__, self).__init__()
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self._moduleName = BMConfigParser().safeGet("inventory", "storage")
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2018-02-18 20:14:21 +01:00
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self._inventoryClass = getattr(getattr(storage, self._moduleName), "{}Inventory".format(self._moduleName.title()))
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2017-05-27 19:03:27 +02:00
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self._realInventory = self._inventoryClass()
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2017-05-31 10:15:47 +02:00
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self.numberOfInventoryLookupsPerformed = 0
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2017-05-27 19:03:27 +02:00
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# cheap inheritance copied from asyncore
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def __getattr__(self, attr):
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try:
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2017-05-31 10:15:47 +02:00
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if attr == "__contains__":
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self.numberOfInventoryLookupsPerformed += 1
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2017-05-27 19:03:27 +02:00
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realRet = getattr(self._realInventory, attr)
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except AttributeError:
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raise AttributeError("%s instance has no attribute '%s'" %(self.__class__.__name__, attr))
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else:
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return realRet
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2017-01-15 19:21:24 +01:00
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2017-03-19 22:08:00 +01:00
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class PendingDownloadQueue(Queue.Queue):
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2017-01-19 19:48:12 +01:00
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# keep a track of objects that have been advertised to us but we haven't downloaded them yet
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2017-03-20 01:22:37 +01:00
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maxWait = 300
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2017-03-19 22:08:00 +01:00
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def __init__(self, maxsize=0):
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Queue.Queue.__init__(self, maxsize)
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2017-01-15 22:21:19 +01:00
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self.stopped = False
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2017-03-20 01:22:37 +01:00
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self.pending = {}
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self.lock = RLock()
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2017-03-19 22:08:00 +01:00
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2017-03-20 01:22:37 +01:00
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def task_done(self, hashId):
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2017-03-19 22:08:00 +01:00
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Queue.Queue.task_done(self)
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2017-03-20 01:22:37 +01:00
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try:
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with self.lock:
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del self.pending[hashId]
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except KeyError:
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pass
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2017-03-19 22:08:00 +01:00
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def get(self, block=True, timeout=None):
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retval = Queue.Queue.get(self, block, timeout)
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# no exception was raised
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if not self.stopped:
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2017-03-20 01:22:37 +01:00
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with self.lock:
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self.pending[retval] = time.time()
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2017-03-19 22:08:00 +01:00
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return retval
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2017-03-20 01:22:37 +01:00
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def clear(self):
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with self.lock:
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newPending = {}
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for hashId in self.pending:
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if self.pending[hashId] + PendingDownloadQueue.maxWait > time.time():
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newPending[hashId] = self.pending[hashId]
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self.pending = newPending
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2017-03-19 22:08:00 +01:00
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@staticmethod
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def totalSize():
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size = 0
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for thread in threadingEnumerate():
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if thread.isAlive() and hasattr(thread, 'downloadQueue'):
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2017-03-20 01:22:37 +01:00
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size += thread.downloadQueue.qsize() + len(thread.downloadQueue.pending)
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2017-03-19 22:08:00 +01:00
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return size
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@staticmethod
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def stop():
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for thread in threadingEnumerate():
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if thread.isAlive() and hasattr(thread, 'downloadQueue'):
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thread.downloadQueue.stopped = True
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2017-03-20 01:22:37 +01:00
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with thread.downloadQueue.lock:
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thread.downloadQueue.pending = {}
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2017-01-19 19:48:12 +01:00
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class PendingUploadDeadlineException(Exception):
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pass
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@Singleton
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class PendingUpload(object):
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# keep a track of objects that we have created but haven't distributed yet
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def __init__(self):
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super(self.__class__, self).__init__()
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self.lock = RLock()
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self.hashes = {}
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# end by this time in any case
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self.deadline = 0
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self.maxLen = 0
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2017-03-01 10:05:08 +01:00
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# during shutdown, wait up to 20 seconds to finish uploading
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self.shutdownWait = 20
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# forget tracking objects after 60 seconds
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self.objectWait = 60
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# wait 10 seconds between clears
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self.clearDelay = 10
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self.lastCleared = time.time()
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2017-01-19 19:48:12 +01:00
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def add(self, objectHash = None):
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with self.lock:
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# add a new object into existing thread lists
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if objectHash:
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if objectHash not in self.hashes:
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2017-03-01 10:05:08 +01:00
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self.hashes[objectHash] = {'created': time.time(), 'sendCount': 0, 'peers': []}
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2017-01-19 19:48:12 +01:00
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for thread in threadingEnumerate():
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if thread.isAlive() and hasattr(thread, 'peer') and \
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2017-03-01 10:05:08 +01:00
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thread.peer not in self.hashes[objectHash]['peers']:
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self.hashes[objectHash]['peers'].append(thread.peer)
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2017-01-19 19:48:12 +01:00
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# add all objects into the current thread
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else:
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2017-01-19 20:04:45 +01:00
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for objectHash in self.hashes:
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2017-03-01 10:05:08 +01:00
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if current_thread().peer not in self.hashes[objectHash]['peers']:
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self.hashes[objectHash]['peers'].append(current_thread().peer)
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2017-01-19 19:48:12 +01:00
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def len(self):
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2017-03-01 10:05:08 +01:00
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self.clearHashes()
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2017-01-19 19:48:12 +01:00
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with self.lock:
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2017-03-01 10:05:08 +01:00
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return sum(1
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for x in self.hashes if (self.hashes[x]['created'] + self.objectWait < time.time() or
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self.hashes[x]['sendCount'] == 0))
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2017-01-19 19:48:12 +01:00
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def _progress(self):
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with self.lock:
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2017-03-01 10:05:08 +01:00
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return float(sum(len(self.hashes[x]['peers'])
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for x in self.hashes if (self.hashes[x]['created'] + self.objectWait < time.time()) or
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self.hashes[x]['sendCount'] == 0))
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2017-01-19 19:48:12 +01:00
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2017-03-01 10:05:08 +01:00
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def progress(self, raiseDeadline=True):
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2017-01-19 19:48:12 +01:00
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if self.maxLen < self._progress():
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self.maxLen = self._progress()
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if self.deadline < time.time():
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2017-03-01 10:05:08 +01:00
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if self.deadline > 0 and raiseDeadline:
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2017-01-19 19:48:12 +01:00
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raise PendingUploadDeadlineException
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self.deadline = time.time() + 20
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try:
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return 1.0 - self._progress() / self.maxLen
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except ZeroDivisionError:
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return 1.0
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2017-03-01 10:05:08 +01:00
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def clearHashes(self, objectHash=None):
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if objectHash is None:
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if self.lastCleared > time.time() - self.clearDelay:
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return
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objects = self.hashes.keys()
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else:
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objects = objectHash,
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with self.lock:
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for i in objects:
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try:
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if self.hashes[i]['sendCount'] > 0 and (
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len(self.hashes[i]['peers']) == 0 or
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self.hashes[i]['created'] + self.objectWait < time.time()):
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del self.hashes[i]
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except KeyError:
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pass
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self.lastCleared = time.time()
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def delete(self, objectHash=None):
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2017-01-19 19:48:12 +01:00
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if not hasattr(current_thread(), 'peer'):
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return
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2017-03-01 10:05:08 +01:00
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if objectHash is None:
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return
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2017-01-19 19:48:12 +01:00
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with self.lock:
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2017-03-01 10:05:08 +01:00
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try:
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if objectHash in self.hashes and current_thread().peer in self.hashes[objectHash]['peers']:
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self.hashes[objectHash]['sendCount'] += 1
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self.hashes[objectHash]['peers'].remove(current_thread().peer)
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except KeyError:
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2017-03-02 15:02:51 +01:00
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pass
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2017-03-01 10:05:08 +01:00
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self.clearHashes(objectHash)
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2017-01-19 19:48:12 +01:00
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def stop(self):
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with self.lock:
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self.hashes = {}
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def threadEnd(self):
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2017-03-01 10:05:08 +01:00
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with self.lock:
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for objectHash in self.hashes:
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try:
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if current_thread().peer in self.hashes[objectHash]['peers']:
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self.hashes[objectHash]['peers'].remove(current_thread().peer)
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except KeyError:
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pass
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self.clearHashes()
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