class SessionDB(object):
def __init__(self, serverId, sessionDuration):
self.serverId = serverId
self.sessionDuration = sessionDuration
self.sessions = SessionList()
self.updated = Event()
def requestSession(self, source, destination):
key = SessionKey(server=self.serverId, uuid=uuid.uuid4())
now = time.time()
validUntil = now + self.sessionDuration
s = Session(key, now, source, destination.key, validUntil)
_log.debug("Created session {}".format(key))
self.sessions[key] = s
self.updated.fire([key])
return s
def validateSession(self, sessionKey, destination):
try:
s = self.sessions[sessionKey]
except KeyError:
raise DatabaseException("Session {0} not found".format(sessionKey))
if s.destination != destination.key:
raise DatabaseException("Requested destination "
"{0} does not match session "
"{1}".format(destination, s))
return True
def merger(self):
return SessionDBMerger(self)
class HostDB(object):
def __init__(self):
self.hosts = {}
self.updated = Event()
def validateHost(self, address, cname):
if address not in self.hosts:
# Remember invalid hosts anyway, to ease administration
self.hosts[address] = Host(address, time.time(), cname, True)
self.updated.fire([address])
raise DatabaseException("Unknown host {0}, "
"remembering".format(address))
h = self.hosts[address]
if not h.isAllowed:
raise DatabaseException("Forbidden host {0}".format(h))
if h.name != cname:
raise DatabaseException("Bad computer name {0} "
"for host {1}".format(cname, h))
return h
def queryHost(self, address):
if address not in self.hosts:
raise DatabaseException("Unknown host {0}".format(address))
h = self.hosts[address]
if not h.isAllowed:
raise DatabaseException("Forbidden host {0}".format(h))
return h
def merger(self):
return HostDBMerger(self)
def __init__(self, localServerId, remoteServerId):
super(ReplicationProtocol, self).__init__()
_log.debug("Constructed")
self._localServerId = localServerId
self._remoteServerId = remoteServerId
self._remoteServerIdD = Deferred()
self.onUpdate = Event()
self.onListRequest = Event()
if self._remoteServerId:
self._remoteServerIdD.callback(self._remoteServerId)
class ReplicationProtocol(SignalingMixin, StatefulProtocol):
def __init__(self, localServerId, remoteServerId):
super(ReplicationProtocol, self).__init__()
_log.debug("Constructed")
self._localServerId = localServerId
self._remoteServerId = remoteServerId
self._remoteServerIdD = Deferred()
self.onUpdate = Event()
self.onListRequest = Event()
if self._remoteServerId:
self._remoteServerIdD.callback(self._remoteServerId)
@timeout()
@inlineCallbacks
def announce(self):
_log.info('Announcing serverId to %s', self.transport.getPeer())
self.writeUInt8(0x02)
self.writeString8(self._localServerId)
reply = yield self.readUInt8()
if reply != 0x04:
raise ProtocolException("Invalid reply to SERVER_ID")
self._remoteServerId = yield self.readString8()
self._remoteServerIdD.callback(self._remoteServerId)
@timeout()
def list(self):
self.writeUInt8(0xF0)
keys = pb2.List()
data = keys.SerializeToString()
_log.debug('Requesting LIST: data=%s', data)
self.writeBinary16(data)
return self.onUpdate.waitFor1()
def sendUpdates(self, (sessionUpdates, hostUpdates)):
updatesList = pb2.List()
updatesList.hosts.extend(hostUpdates)
updatesList.sessions.extend(sessionUpdates)
data = updatesList.SerializeToString()
self.writeUInt8(0xF1)
self.writeBinary16(data)
class SignalingMixin(object):
def __init__(self, *args, **kwargs):
super(SignalingMixin, self).__init__(*args, **kwargs)
self.dataEvent = Event()
self.disconnectEvent = Event()
self.connectEvent = Event()
def dataReceived(self, data):
self.dataEvent.fire(data)
super(SignalingMixin, self).dataReceived(data)
def connectionLost(self, reason):
self.disconnectEvent.fire(reason)
super(SignalingMixin, self).connectionLost(reason)
def connectionMade(self):
self.connectEvent.fire()
super(SignalingMixin, self).connectionMade()
def __init__(self, *args, **kwargs):
super(SignalingMixin, self).__init__(*args, **kwargs)
self.dataEvent = Event()
self.disconnectEvent = Event()
self.connectEvent = Event()
def __init__(self, serverId, sessionDuration):
self.serverId = serverId
self.sessionDuration = sessionDuration
self.sessions = SessionList()
self.updated = Event()
def __init__(self):
self.hosts = {}
self.updated = Event()
