PyBitmessage/src/network/bmqueues.py

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import time
from inventory import Inventory
from network.downloadqueue import DownloadQueue
from network.uploadqueue import UploadQueue
haveBloom = False
try:
# pybloomfiltermmap
from pybloomfilter import BloomFilter
haveBloom = True
except ImportError:
try:
# pybloom
from pybloom import BloomFilter
haveBloom = True
except ImportError:
pass
# it isn't actually implemented yet so no point in turning it on
haveBloom = False
class BMQueues(object):
invCleanPeriod = 300
invInitialCapacity = 50000
invErrorRate = 0.03
def __init__(self):
self.objectsNewToMe = {}
self.objectsNewToThem = {}
self.initInvBloom()
self.initAddrBloom()
def initInvBloom(self):
if haveBloom:
# lock?
self.invBloom = BloomFilter(capacity=BMQueues.invInitialCapacity,
error_rate=BMQueues.invErrorRate)
def initAddrBloom(self):
if haveBloom:
# lock?
self.addrBloom = BloomFilter(capacity=BMQueues.invInitialCapacity,
error_rate=BMQueues.invErrorRate)
def clean(self):
if self.lastcleaned < time.time() - BMQueues.invCleanPeriod:
if haveBloom:
if PendingDownloadQueue().size() == 0:
self.initInvBloom()
self.initAddrBloom()
else:
# release memory
self.objectsNewToMe = self.objectsNewToMe.copy()
self.objectsNewToThem = self.objectsNewToThem.copy()
def hasObj(self, hashid):
if haveBloom:
return hashid in self.invBloom
else:
return hashid in self.objectsNewToMe
def handleReceivedObj(self, hashid):
if haveBloom:
self.invBloom.add(hashid)
elif hashid in Inventory():
try:
del self.objectsNewToThem[hashid]
except KeyError:
pass
else:
self.objectsNewToMe[hashid] = True
def hasAddr(self, addr):
if haveBloom:
return addr in self.invBloom
def addAddr(self, hashid):
if haveBloom:
self.addrBloom.add(hashid)
# addr sending -> per node upload queue, and flush every minute or so
# inv sending -> if not in bloom, inv immediately, otherwise put into a per node upload queue and flush every minute or so
# no bloom
# - if inv arrives
# - if we don't have it, add tracking and download queue
# - if we do have it, remove from tracking
# tracking downloads
# - per node hash of items the node has but we don't
# tracking inv
# - per node hash of items that neither the remote node nor we have
#