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# -*- coding: utf-8 -*-
# Copyright 2014, 2015 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.
"""This layer is responsible for replicating with remote home servers using
a given transport.
"""
from .federation_client import FederationClient
from .federation_server import FederationServer
from .transaction_queue import TransactionQueue
from .persistence import TransactionActions
import logging
logger = logging.getLogger(__name__)
class ReplicationLayer(FederationClient, FederationServer):
"""This layer is responsible for replicating with remote home servers over
the given transport. I.e., does the sending and receiving of PDUs to
remote home servers.
The layer communicates with the rest of the server via a registered
ReplicationHandler.
In more detail, the layer:
* Receives incoming data and processes it into transactions and pdus.
* Fetches any PDUs it thinks it might have missed.
* Keeps the current state for contexts up to date by applying the
suitable conflict resolution.
* Sends outgoing pdus wrapped in transactions.
* Fills out the references to previous pdus/transactions appropriately
for outgoing data.
"""
def __init__(self, hs, transport_layer):
self.server_name = hs.hostname
self.transport_layer = transport_layer
self.transport_layer.register_received_handler(self)
self.transport_layer.register_request_handler(self)
self.federation_client = self
self.store = hs.get_datastore()
self.handler = None
self.edu_handlers = {}
self.query_handlers = {}
self._clock = hs.get_clock()
self.transaction_actions = TransactionActions(self.store)
self._transaction_queue = TransactionQueue(hs, transport_layer)
self._order = 0
def __str__(self):
return "<ReplicationLayer(%s)>" % self.server_name
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