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# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from .units import Edu
from blist import sorteddict
import ujson
PRESENCE_TYPE = "p"
KEYED_EDU_TYPE = "k"
EDU_TYPE = "e"
FAILURE_TYPE = "f"
DEVICE_MESSAGE_TYPE = "d"
class FederationRemoteSendQueue(object):
def __init__(self, hs):
self.server_name = hs.hostname
self.clock = hs.get_clock()
# TODO: Add metrics for size of lists below
self.presence_map = {}
self.presence_changed = sorteddict()
self.keyed_edu = {}
self.keyed_edu_changed = sorteddict()
self.edus = sorteddict()
self.failures = sorteddict()
self.pos = 1
self.pos_time = sorteddict()
self.device_messages = sorteddict()
self.clock.looping_call(self._clear_queue, 30 * 1000)
def _next_pos(self):
pos = self.pos
self.pos += 1
self.pos_time[self.clock.time_msec()] = pos
return pos
def _clear_queue(self):
# TODO measure this function time.
FIVE_MINUTES_AGO = 5 * 60 * 1000
now = self.clock.time_msec()
keys = self.pos_time.keys()
time = keys.bisect_left(now - FIVE_MINUTES_AGO)
if not keys[:time]:
return
position_to_delete = max(keys[:time])
for key in keys[:time]:
del self.pos_time[key]
self._clear_queue_before_pos(position_to_delete)
def _clear_queue_before_pos(self, position_to_delete):
# Delete things out of presence maps
keys = self.presence_changed.keys()
i = keys.bisect_left(position_to_delete)
for key in keys[:i]:
del self.presence_changed[key]
user_ids = set(
user_id for uids in self.presence_changed.values() for _, user_id in uids
)
to_del = [user_id for user_id in self.presence_map if user_id not in user_ids]
for user_id in to_del:
del self.presence_map[user_id]
# Delete things out of keyed edus
keys = self.keyed_edu_changed.keys()
i = keys.bisect_left(position_to_delete)
for key in keys[:i]:
del self.keyed_edu_changed[key]
live_keys = set()
for edu_key in self.keyed_edu_changed.values():
live_keys.add(edu_key)
to_del = [edu_key for edu_key in self.keyed_edu if edu_key not in live_keys]
for edu_key in to_del:
del self.keyed_edu[edu_key]
# Delete things out of edu map
keys = self.edus.keys()
i = keys.bisect_left(position_to_delete)
for key in keys[:i]:
del self.edus[key]
# Delete things out of failure map
keys = self.failures.keys()
i = keys.bisect_left(position_to_delete)
for key in keys[:i]:
del self.failures[key]
# Delete things out of device map
keys = self.device_messages.keys()
i = keys.bisect_left(position_to_delete)
for key in keys[:i]:
del self.device_messages[key]
def notify_new_events(self, current_id):
pass
def send_edu(self, destination, edu_type, content, key=None):
pos = self._next_pos()
edu = Edu(
origin=self.server_name,
destination=destination,
edu_type=edu_type,
content=content,
)
if key:
assert isinstance(key, tuple)
self.keyed_edu[(destination, key)] = edu
self.keyed_edu_changed[pos] = (destination, key)
else:
self.edus[pos] = edu
def send_presence(self, destination, states):
pos = self._next_pos()
self.presence_map.update({
state.user_id: state
for state in states
})
self.presence_changed[pos] = [
(destination, state.user_id) for state in states
]
def send_failure(self, failure, destination):
pos = self._next_pos()
self.failures[pos] = (destination, str(failure))
def send_device_messages(self, destination):
pos = self._next_pos()
self.device_messages[pos] = destination
def get_current_token(self):
return self.pos - 1
def get_replication_rows(self, token, limit):
# TODO: Handle limit.
# To handle restarts where we wrap around
if token > self.pos:
token = -1
rows = []
# There should be only one reader, so lets delete everything its
# acknowledged its seen.
self._clear_queue_before_pos(token)
# Fetch changed presence
keys = self.presence_changed.keys()
i = keys.bisect_right(token)
dest_user_ids = set(
(pos, dest_user_id)
for pos in keys[i:]
for dest_user_id in self.presence_changed[pos]
)
for (key, (dest, user_id)) in dest_user_ids:
rows.append((key, PRESENCE_TYPE, ujson.dumps({
"destination": dest,
"state": self.presence_map[user_id].as_dict(),
})))
# Fetch changes keyed edus
keys = self.keyed_edu_changed.keys()
i = keys.bisect_right(token)
keyed_edus = set((k, self.keyed_edu_changed[k]) for k in keys[i:])
for (pos, (destination, edu_key)) in keyed_edus:
rows.append(
(pos, KEYED_EDU_TYPE, ujson.dumps({
"key": edu_key,
"edu": self.keyed_edu[(destination, edu_key)].get_internal_dict(),
}))
)
# Fetch changed edus
keys = self.edus.keys()
i = keys.bisect_right(token)
edus = set((k, self.edus[k]) for k in keys[i:])
for (pos, edu) in edus:
rows.append((pos, EDU_TYPE, ujson.dumps(edu.get_internal_dict())))
# Fetch changed failures
keys = self.failures.keys()
i = keys.bisect_right(token)
failures = set((k, self.failures[k]) for k in keys[i:])
for (pos, (destination, failure)) in failures:
rows.append((pos, FAILURE_TYPE, ujson.dumps({
"destination": destination,
"failure": failure,
})))
# Fetch changed device messages
keys = self.device_messages.keys()
i = keys.bisect_right(token)
device_messages = set((k, self.device_messages[k]) for k in keys[i:])
for (pos, destination) in device_messages:
rows.append((pos, DEVICE_MESSAGE_TYPE, ujson.dumps({
"destination": destination,
})))
# Sort rows based on pos
rows.sort()
return rows
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