137 lines
4.3 KiB
Python
137 lines
4.3 KiB
Python
"""
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Module for tracking objects
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"""
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import time
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from threading import RLock
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import network.connectionpool
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from network.dandelion import Dandelion
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from randomtrackingdict import RandomTrackingDict
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haveBloom = False
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try:
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# pybloomfiltermmap
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from pybloomfilter import BloomFilter
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haveBloom = True
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except ImportError:
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try:
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# pybloom
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from pybloom import BloomFilter
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haveBloom = True
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except ImportError:
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pass
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# it isn't actually implemented yet so no point in turning it on
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haveBloom = False
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# tracking pending downloads globally, for stats
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missingObjects = {}
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class ObjectTracker(object):
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"""Object tracker mixin"""
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invCleanPeriod = 300
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invInitialCapacity = 50000
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invErrorRate = 0.03
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trackingExpires = 3600
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initialTimeOffset = 60
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def __init__(self):
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self.objectsNewToMe = RandomTrackingDict()
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self.objectsNewToThem = {}
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self.objectsNewToThemLock = RLock()
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self.initInvBloom()
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self.initAddrBloom()
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self.lastCleaned = time.time()
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def initInvBloom(self):
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"""Init bloom filter for tracking. WIP."""
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if haveBloom:
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# lock?
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self.invBloom = BloomFilter(
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capacity=ObjectTracker.invInitialCapacity,
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error_rate=ObjectTracker.invErrorRate)
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def initAddrBloom(self):
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"""Init bloom filter for tracking addrs, WIP.
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This either needs to be moved to addrthread.py or removed."""
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if haveBloom:
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# lock?
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self.addrBloom = BloomFilter(
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capacity=ObjectTracker.invInitialCapacity,
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error_rate=ObjectTracker.invErrorRate)
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def clean(self):
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"""Clean up tracking to prevent memory bloat"""
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if self.lastCleaned < time.time() - ObjectTracker.invCleanPeriod:
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if haveBloom:
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if missingObjects == 0:
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self.initInvBloom()
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self.initAddrBloom()
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else:
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# release memory
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deadline = time.time() - ObjectTracker.trackingExpires
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with self.objectsNewToThemLock:
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self.objectsNewToThem = {
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k: v
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for k, v in self.objectsNewToThem.iteritems()
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if v >= deadline}
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self.lastCleaned = time.time()
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def hasObj(self, hashid):
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"""Do we already have object?"""
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if haveBloom:
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return hashid in self.invBloom
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return hashid in self.objectsNewToMe
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def handleReceivedInventory(self, hashId):
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"""Handling received inventory"""
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if haveBloom:
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self.invBloom.add(hashId)
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try:
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with self.objectsNewToThemLock:
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del self.objectsNewToThem[hashId]
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except KeyError:
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pass
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if hashId not in missingObjects:
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missingObjects[hashId] = time.time()
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self.objectsNewToMe[hashId] = True
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def handleReceivedObject(self, streamNumber, hashid):
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"""Handling received object"""
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for i in network.connectionpool.BMConnectionPool().connections():
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if not i.fullyEstablished:
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continue
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try:
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del i.objectsNewToMe[hashid]
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except KeyError:
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if streamNumber in i.streams and (
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not Dandelion().hasHash(hashid) or
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Dandelion().objectChildStem(hashid) == i):
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with i.objectsNewToThemLock:
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i.objectsNewToThem[hashid] = time.time()
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# update stream number,
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# which we didn't have when we just received the dinv
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# also resets expiration of the stem mode
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Dandelion().setHashStream(hashid, streamNumber)
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if i == self:
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try:
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with i.objectsNewToThemLock:
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del i.objectsNewToThem[hashid]
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except KeyError:
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pass
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self.objectsNewToMe.setLastObject()
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def hasAddr(self, addr):
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"""WIP, should be moved to addrthread.py or removed"""
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if haveBloom:
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return addr in self.invBloom
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return None
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def addAddr(self, hashid):
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"""WIP, should be moved to addrthread.py or removed"""
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if haveBloom:
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self.addrBloom.add(hashid)
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