-from time import time
-from pickle import loads, dumps
-
-from bsddb3 import db
+## Copyright 2002-2004 Andrew Loewenstern, All Rights Reserved
+# see LICENSE.txt for license information
-from const import reactor
+from time import time
-from hash import intify
-from knode import KNode as Node
-from ktable import KTable, K
+from twisted.internet import reactor
-# concurrent FIND_NODE/VALUE requests!
-N = 3
+import const
+from khash import intify
class ActionBase:
""" base class for some long running asynchronous proccesses like finding nodes or values """
def __init__(self, table, target, callback):
- self.table = table
- self.target = target
- self.int = intify(target)
- self.found = {}
- self.queried = {}
- self.answered = {}
- self.callback = callback
- self.outstanding = 0
- self.finished = 0
-
- def sort(a, b, int=self.int):
- """ this function is for sorting nodes relative to the ID we are looking for """
- x, y = int ^ a.int, int ^ b.int
- if x > y:
- return 1
- elif x < y:
- return -1
- return 0
- self.sort = sort
+ self.table = table
+ self.target = target
+ self.num = intify(target)
+ self.found = {}
+ self.queried = {}
+ self.answered = {}
+ self.callback = callback
+ self.outstanding = 0
+ self.finished = 0
+ def sort(a, b, num=self.num):
+ """ this function is for sorting nodes relative to the ID we are looking for """
+ x, y = num ^ a.num, num ^ b.num
+ if x > y:
+ return 1
+ elif x < y:
+ return -1
+ return 0
+ self.sort = sort
+
def goWithNodes(self, t):
- pass
-
-
+ pass
+
+
FIND_NODE_TIMEOUT = 15
class FindNode(ActionBase):
""" find node action merits it's own class as it is a long running stateful process """
- def handleGotNodes(self, args):
- l, sender = args
- sender = Node().initWithDict(sender)
- if self.finished or self.answered.has_key(sender.id):
- # a day late and a dollar short
- return
- self.outstanding = self.outstanding - 1
- self.answered[sender.id] = 1
- for node in l:
- n = Node().initWithDict(node)
- if not self.found.has_key(n.id):
- self.found[n.id] = n
- self.table.insertNode(n)
- self.schedule()
-
+ def handleGotNodes(self, dict):
+ _krpc_sender = dict['_krpc_sender']
+ dict = dict['rsp']
+ l = dict["nodes"]
+ sender = {'id' : dict["id"]}
+ sender['port'] = _krpc_sender[1]
+ sender['host'] = _krpc_sender[0]
+ sender = self.table.Node().initWithDict(sender)
+ sender.conn = self.table.udp.connectionForAddr((sender.host, sender.port))
+ self.table.table.insertNode(sender)
+ if self.finished or self.answered.has_key(sender.id):
+ # a day late and a dollar short
+ return
+ self.outstanding = self.outstanding - 1
+ self.answered[sender.id] = 1
+ for node in l:
+ n = self.table.Node().initWithDict(node)
+ n.conn = self.table.udp.connectionForAddr((n.host, n.port))
+ if not self.found.has_key(n.id):
+ self.found[n.id] = n
+ self.schedule()
+
def schedule(self):
- """
- send messages to new peers, if necessary
- """
- if self.finished:
- return
- l = self.found.values()
- l.sort(self.sort)
-
- for node in l[:K]:
- if node.id == self.target:
- self.finished=1
- return self.callback([node])
- if not self.queried.has_key(node.id) and node.id != self.table.node.id:
- #xxxx t.timeout = time.time() + FIND_NODE_TIMEOUT
- df = node.findNode(self.target, self.table.node.senderDict())
- df.addCallbacks(self.handleGotNodes, self.defaultGotNodes)
- self.outstanding = self.outstanding + 1
- self.queried[node.id] = 1
- if self.outstanding >= N:
- break
- assert(self.outstanding) >=0
- if self.outstanding == 0:
- ## all done!!
- self.finished=1
- reactor.callFromThread(self.callback, l[:K])
-
- def defaultGotNodes(self, t):
- if self.finished:
- return
- self.outstanding = self.outstanding - 1
- self.schedule()
-
-
+ """
+ send messages to new peers, if necessary
+ """
+ if self.finished:
+ return
+ l = self.found.values()
+ l.sort(self.sort)
+ for node in l[:const.K]:
+ if node.id == self.target:
+ self.finished=1
+ return self.callback([node])
+ if (not self.queried.has_key(node.id)) and node.id != self.table.node.id:
+ #xxxx t.timeout = time.time() + FIND_NODE_TIMEOUT
+ df = node.findNode(self.target, self.table.node.id)
+ df.addCallbacks(self.handleGotNodes, self.makeMsgFailed(node))
+ self.outstanding = self.outstanding + 1
+ self.queried[node.id] = 1
+ if self.outstanding >= const.CONCURRENT_REQS:
+ break
+ assert(self.outstanding) >=0
+ if self.outstanding == 0:
+ ## all done!!
+ self.finished=1
+ reactor.callLater(0, self.callback, l[:const.K])
+
+ def makeMsgFailed(self, node):
+ def defaultGotNodes(err, self=self, node=node):
+ print ">>> find failed %s/%s" % (node.host, node.port), err
+ self.table.table.nodeFailed(node)
+ self.outstanding = self.outstanding - 1
+ self.schedule()
+ return defaultGotNodes
+
def goWithNodes(self, nodes):
- """
- this starts the process, our argument is a transaction with t.extras being our list of nodes
- it's a transaction since we got called from the dispatcher
- """
- for node in nodes:
- if node.id == self.table.node.id:
- continue
- self.found[node.id] = node
- #xxx t.timeout = time.time() + FIND_NODE_TIMEOUT
- df = node.findNode(self.target, self.table.node.senderDict())
- df.addCallbacks(self.handleGotNodes, self.defaultGotNodes)
- self.outstanding = self.outstanding + 1
- self.queried[node.id] = 1
- if self.outstanding == 0:
- self.callback(nodes)
-
+ """
+ this starts the process, our argument is a transaction with t.extras being our list of nodes
+ it's a transaction since we got called from the dispatcher
+ """
+ for node in nodes:
+ if node.id == self.table.node.id:
+ continue
+ else:
+ self.found[node.id] = node
+
+ self.schedule()
+
-GET_VALUE_TIMEOUT = 15
+get_value_timeout = 15
class GetValue(FindNode):
+ def __init__(self, table, target, callback, find="findValue"):
+ FindNode.__init__(self, table, target, callback)
+ self.findValue = find
+
""" get value task """
- def handleGotNodes(self, args):
- l, sender = args
- sender = Node().initWithDict(sender)
- if self.finished or self.answered.has_key(sender.id):
- # a day late and a dollar short
- return
- self.outstanding = self.outstanding - 1
- self.answered[sender.id] = 1
- # go through nodes
- # if we have any closer than what we already got, query them
- if l.has_key('nodes'):
- for node in l['nodes']:
- n = Node().initWithDict(node)
- if not self.found.has_key(n.id):
- self.found[n.id] = n
- self.table.insertNode(n)
- elif l.has_key('values'):
- def x(y, z=self.results):
- y = y.data
- if not z.has_key(y):
- z[y] = 1
- return y
- v = filter(None, map(x, l['values']))
- if(len(v)):
- reactor.callFromThread(self.callback, v)
- self.schedule()
-
+ def handleGotNodes(self, dict):
+ _krpc_sender = dict['_krpc_sender']
+ dict = dict['rsp']
+ sender = {'id' : dict["id"]}
+ sender['port'] = _krpc_sender[1]
+ sender['host'] = _krpc_sender[0]
+ sender = self.table.Node().initWithDict(sender)
+ sender.conn = self.table.udp.connectionForAddr((sender.host, sender.port))
+ self.table.table.insertNode(sender)
+ if self.finished or self.answered.has_key(sender.id):
+ # a day late and a dollar short
+ return
+ self.outstanding = self.outstanding - 1
+ self.answered[sender.id] = 1
+ # go through nodes
+ # if we have any closer than what we already got, query them
+ if dict.has_key('nodes'):
+ for node in dict['nodes']:
+ n = self.table.Node().initWithDict(node)
+ n.conn = self.table.udp.connectionForAddr((n.host, n.port))
+ if not self.found.has_key(n.id):
+ self.found[n.id] = n
+ elif dict.has_key('values'):
+ def x(y, z=self.results):
+ if not z.has_key(y):
+ z[y] = 1
+ return y
+ else:
+ return None
+ z = len(dict['values'])
+ v = filter(None, map(x, dict['values']))
+ if(len(v)):
+ reactor.callLater(0, self.callback, v)
+ self.schedule()
+
## get value
def schedule(self):
- if self.finished:
- return
- l = self.found.values()
- l.sort(self.sort)
+ if self.finished:
+ return
+ l = self.found.values()
+ l.sort(self.sort)
+
+ for node in l[:const.K]:
+ if (not self.queried.has_key(node.id)) and node.id != self.table.node.id:
+ #xxx t.timeout = time.time() + GET_VALUE_TIMEOUT
+ try:
+ f = getattr(node, self.findValue)
+ except AttributeError:
+ print ">>> findValue %s doesn't have a %s method!" % (node, self.findValue)
+ else:
+ df = f(self.target, self.table.node.id)
+ df.addCallback(self.handleGotNodes)
+ df.addErrback(self.makeMsgFailed(node))
+ self.outstanding = self.outstanding + 1
+ self.queried[node.id] = 1
+ if self.outstanding >= const.CONCURRENT_REQS:
+ break
+ assert(self.outstanding) >=0
+ if self.outstanding == 0:
+ ## all done, didn't find it!!
+ self.finished=1
+ reactor.callLater(0, self.callback,[])
- for node in l[:K]:
- if not self.queried.has_key(node.id) and node.id != self.table.node.id:
- #xxx t.timeout = time.time() + GET_VALUE_TIMEOUT
- df = node.findValue(self.target, self.table.node.senderDict())
- df.addCallback(self.handleGotNodes)
- df.addErrback(self.defaultGotNodes)
- self.outstanding = self.outstanding + 1
- self.queried[node.id] = 1
- if self.outstanding >= N:
- break
- assert(self.outstanding) >=0
- if self.outstanding == 0:
- ## all done, didn't find it!!
- self.finished=1
- reactor.callFromThread(self.callback,[])
-
## get value
def goWithNodes(self, nodes, found=None):
- self.results = {}
- if found:
- for n in found:
- self.results[n] = 1
- for node in nodes:
- if node.id == self.table.node.id:
- continue
- self.found[node.id] = node
- #xxx t.timeout = time.time() + FIND_NODE_TIMEOUT
- df = node.findValue(self.target, self.table.node.senderDict())
- df.addCallback(self.handleGotNodes)
- df.addErrback(self.defaultGotNodes)
- self.outstanding = self.outstanding + 1
- self.queried[node.id] = 1
- if self.outstanding == 0:
- reactor.callFromThread(self.callback, [])
+ self.results = {}
+ if found:
+ for n in found:
+ self.results[n] = 1
+ for node in nodes:
+ if node.id == self.table.node.id:
+ continue
+ else:
+ self.found[node.id] = node
+
+ self.schedule()
-KEINITIAL_DELAY = 60 * 60 * 24 # 24 hours
-KE_DELAY = 60 * 60 # 1 hour
-KE_AGE = KEINITIAL_DELAY
+class StoreValue(ActionBase):
+ def __init__(self, table, target, value, callback, store="storeValue"):
+ ActionBase.__init__(self, table, target, callback)
+ self.value = value
+ self.stored = []
+ self.store = store
+
+ def storedValue(self, t, node):
+ self.outstanding -= 1
+ self.table.insertNode(node)
+ if self.finished:
+ return
+ self.stored.append(t)
+ if len(self.stored) >= const.STORE_REDUNDANCY:
+ self.finished=1
+ self.callback(self.stored)
+ else:
+ if not len(self.stored) + self.outstanding >= const.STORE_REDUNDANCY:
+ self.schedule()
+ return t
+
+ def storeFailed(self, t, node):
+ print ">>> store failed %s/%s" % (node.host, node.port)
+ self.table.nodeFailed(node)
+ self.outstanding -= 1
+ if self.finished:
+ return t
+ self.schedule()
+ return t
+
+ def schedule(self):
+ if self.finished:
+ return
+ num = const.CONCURRENT_REQS - self.outstanding
+ if num > const.STORE_REDUNDANCY:
+ num = const.STORE_REDUNDANCY
+ for i in range(num):
+ try:
+ node = self.nodes.pop()
+ except IndexError:
+ if self.outstanding == 0:
+ self.finished = 1
+ self.callback(self.stored)
+ else:
+ if not node.id == self.table.node.id:
+ self.outstanding += 1
+ try:
+ f = getattr(node, self.store)
+ except AttributeError:
+ print ">>> %s doesn't have a %s method!" % (node, self.store)
+ else:
+ df = f(self.target, self.value, self.table.node.id)
+ df.addCallback(self.storedValue, node=node)
+ df.addErrback(self.storeFailed, node=node)
+
+ def goWithNodes(self, nodes):
+ self.nodes = nodes
+ self.nodes.sort(self.sort)
+ self.schedule()
+
class KeyExpirer:
- def __init__(self, store, itime, kw):
- self.store = store
- self.itime = itime
- self.kw = kw
- reactor.callLater(KEINITIAL_DELAY, self.doExpire)
-
+ def __init__(self, store):
+ self.store = store
+ reactor.callLater(const.KEINITIAL_DELAY, self.doExpire)
+
def doExpire(self):
- self.cut = `time() - KE_AGE`
- self._expire()
-
+ self.cut = "%0.6f" % (time() - const.KE_AGE)
+ self._expire()
+
def _expire(self):
- ic = self.itime.cursor()
- sc = self.store.cursor()
- kc = self.kw.cursor()
- irec = None
- try:
- irec = ic.set_range(self.cut)
- except db.DBNotFoundError:
- # everything is expired
- f = ic.prev
- irec = f()
- else:
- f = ic.next
- i = 0
- while irec:
- it, h = irec
- try:
- k, v, lt = loads(self.store[h])
- except KeyError:
- ic.delete()
- else:
- if lt < self.cut:
- try:
- kc.set_both(k, h)
- except db.DBNotFoundError:
- print "Database inconsistency! No key->value entry when a store entry was found!"
- else:
- kc.delete()
- self.store.delete(h)
- ic.delete()
- i = i + 1
- else:
- break
- irec = f()
-
- reactor.callLater(KE_DELAY, self.doExpire)
- if(i > 0):
- print ">>>KE: done expiring %d" % i
-
\ No newline at end of file
+ c = self.store.cursor()
+ s = "delete from kv where time < '%s';" % self.cut
+ c.execute(s)
+ reactor.callLater(const.KE_DELAY, self.doExpire)
projects / quix0rs-apt-p2p.git / blobdiff