diff options
Diffstat (limited to 'synapse/federation/replication.py')
| -rw-r--r-- | synapse/federation/replication.py | 608 |
1 files changed, 9 insertions, 599 deletions
diff --git a/synapse/federation/replication.py b/synapse/federation/replication.py index accf95e406..9ef4834927 100644 --- a/synapse/federation/replication.py +++ b/synapse/federation/replication.py @@ -17,15 +17,12 @@ a given transport. """ -from twisted.internet import defer +from .federation_client import FederationClient +from .federation_server import FederationServer -from .units import Transaction, Edu -from .persistence import TransactionActions from .transaction_queue import TransactionQueue -from synapse.util.logutils import log_function -from synapse.util.logcontext import PreserveLoggingContext -from synapse.events import FrozenEvent +from .persistence import TransactionActions import logging @@ -33,7 +30,7 @@ import logging logger = logging.getLogger(__name__) -class ReplicationLayer(object): +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. @@ -58,607 +55,20 @@ class ReplicationLayer(object): self.transport_layer.register_received_handler(self) self.transport_layer.register_request_handler(self) - self.store = hs.get_datastore() - # self.pdu_actions = PduActions(self.store) - self.transaction_actions = TransactionActions(self.store) + self.federation_client = self - self._transaction_queue = TransactionQueue( - hs, self.transaction_actions, transport_layer - ) + self.store = hs.get_datastore() self.handler = None self.edu_handlers = {} self.query_handlers = {} - self._order = 0 - self._clock = hs.get_clock() - self.event_builder_factory = hs.get_event_builder_factory() - - def set_handler(self, handler): - """Sets the handler that the replication layer will use to communicate - receipt of new PDUs from other home servers. The required methods are - documented on :py:class:`.ReplicationHandler`. - """ - self.handler = handler - - def register_edu_handler(self, edu_type, handler): - if edu_type in self.edu_handlers: - raise KeyError("Already have an EDU handler for %s" % (edu_type,)) - - self.edu_handlers[edu_type] = handler - - def register_query_handler(self, query_type, handler): - """Sets the handler callable that will be used to handle an incoming - federation Query of the given type. - - Args: - query_type (str): Category name of the query, which should match - the string used by make_query. - handler (callable): Invoked to handle incoming queries of this type - - handler is invoked as: - result = handler(args) - - where 'args' is a dict mapping strings to strings of the query - arguments. It should return a Deferred that will eventually yield an - object to encode as JSON. - """ - if query_type in self.query_handlers: - raise KeyError( - "Already have a Query handler for %s" % (query_type,) - ) - - self.query_handlers[query_type] = handler - - @log_function - def send_pdu(self, pdu, destinations): - """Informs the replication layer about a new PDU generated within the - home server that should be transmitted to others. - - TODO: Figure out when we should actually resolve the deferred. - - Args: - pdu (Pdu): The new Pdu. - - Returns: - Deferred: Completes when we have successfully processed the PDU - and replicated it to any interested remote home servers. - """ - order = self._order - self._order += 1 - - logger.debug("[%s] transaction_layer.enqueue_pdu... ", pdu.event_id) - - # TODO, add errback, etc. - self._transaction_queue.enqueue_pdu(pdu, destinations, order) - - logger.debug( - "[%s] transaction_layer.enqueue_pdu... done", - pdu.event_id - ) - - @log_function - def send_edu(self, destination, edu_type, content): - edu = Edu( - origin=self.server_name, - destination=destination, - edu_type=edu_type, - content=content, - ) - - # TODO, add errback, etc. - self._transaction_queue.enqueue_edu(edu) - return defer.succeed(None) - - @log_function - def send_failure(self, failure, destination): - self._transaction_queue.enqueue_failure(failure, destination) - return defer.succeed(None) - - @log_function - def make_query(self, destination, query_type, args, - retry_on_dns_fail=True): - """Sends a federation Query to a remote homeserver of the given type - and arguments. - - Args: - destination (str): Domain name of the remote homeserver - query_type (str): Category of the query type; should match the - handler name used in register_query_handler(). - args (dict): Mapping of strings to strings containing the details - of the query request. - - Returns: - a Deferred which will eventually yield a JSON object from the - response - """ - return self.transport_layer.make_query( - destination, query_type, args, retry_on_dns_fail=retry_on_dns_fail - ) - - @defer.inlineCallbacks - @log_function - def backfill(self, dest, context, limit, extremities): - """Requests some more historic PDUs for the given context from the - given destination server. - - Args: - dest (str): The remote home server to ask. - context (str): The context to backfill. - limit (int): The maximum number of PDUs to return. - extremities (list): List of PDU id and origins of the first pdus - we have seen from the context - - Returns: - Deferred: Results in the received PDUs. - """ - logger.debug("backfill extrem=%s", extremities) - - # If there are no extremeties then we've (probably) reached the start. - if not extremities: - return - - transaction_data = yield self.transport_layer.backfill( - dest, context, extremities, limit) - - logger.debug("backfill transaction_data=%s", repr(transaction_data)) - - transaction = Transaction(**transaction_data) - - pdus = [ - self.event_from_pdu_json(p, outlier=False) - for p in transaction.pdus - ] - for pdu in pdus: - yield self._handle_new_pdu(dest, pdu, backfilled=True) - - defer.returnValue(pdus) - - @defer.inlineCallbacks - @log_function - def get_pdu(self, destination, event_id, outlier=False): - """Requests the PDU with given origin and ID from the remote home - server. - - This will persist the PDU locally upon receipt. - - Args: - destination (str): Which home server to query - pdu_origin (str): The home server that originally sent the pdu. - event_id (str) - outlier (bool): Indicates whether the PDU is an `outlier`, i.e. if - it's from an arbitary point in the context as opposed to part - of the current block of PDUs. Defaults to `False` - - Returns: - Deferred: Results in the requested PDU. - """ - - transaction_data = yield self.transport_layer.get_event( - destination, event_id - ) - - transaction = Transaction(**transaction_data) - - pdu_list = [ - self.event_from_pdu_json(p, outlier=outlier) - for p in transaction.pdus - ] - - pdu = None - if pdu_list: - pdu = pdu_list[0] - yield self._handle_new_pdu(destination, pdu) - - defer.returnValue(pdu) - - @defer.inlineCallbacks - @log_function - def get_state_for_room(self, destination, room_id, event_id): - """Requests all of the `current` state PDUs for a given room from - a remote home server. - - Args: - destination (str): The remote homeserver to query for the state. - room_id (str): The id of the room we're interested in. - event_id (str): The id of the event we want the state at. - - Returns: - Deferred: Results in a list of PDUs. - """ - - result = yield self.transport_layer.get_room_state( - destination, room_id, event_id=event_id, - ) - - pdus = [ - self.event_from_pdu_json(p, outlier=True) for p in result["pdus"] - ] - - auth_chain = [ - self.event_from_pdu_json(p, outlier=True) - for p in result.get("auth_chain", []) - ] - - defer.returnValue((pdus, auth_chain)) - - @defer.inlineCallbacks - @log_function - def get_event_auth(self, destination, room_id, event_id): - res = yield self.transport_layer.get_event_auth( - destination, room_id, event_id, - ) - - auth_chain = [ - self.event_from_pdu_json(p, outlier=True) - for p in res["auth_chain"] - ] - - auth_chain.sort(key=lambda e: e.depth) - - defer.returnValue(auth_chain) - - @defer.inlineCallbacks - @log_function - def on_backfill_request(self, origin, room_id, versions, limit): - pdus = yield self.handler.on_backfill_request( - origin, room_id, versions, limit - ) - - defer.returnValue((200, self._transaction_from_pdus(pdus).get_dict())) - - @defer.inlineCallbacks - @log_function - def on_incoming_transaction(self, transaction_data): - transaction = Transaction(**transaction_data) - - for p in transaction.pdus: - if "unsigned" in p: - unsigned = p["unsigned"] - if "age" in unsigned: - p["age"] = unsigned["age"] - if "age" in p: - p["age_ts"] = int(self._clock.time_msec()) - int(p["age"]) - del p["age"] - - pdu_list = [ - self.event_from_pdu_json(p) for p in transaction.pdus - ] - - logger.debug("[%s] Got transaction", transaction.transaction_id) - - response = yield self.transaction_actions.have_responded(transaction) - - if response: - logger.debug("[%s] We've already responed to this request", - transaction.transaction_id) - defer.returnValue(response) - return - - logger.debug("[%s] Transaction is new", transaction.transaction_id) - - with PreserveLoggingContext(): - dl = [] - for pdu in pdu_list: - dl.append(self._handle_new_pdu(transaction.origin, pdu)) - - if hasattr(transaction, "edus"): - for edu in [Edu(**x) for x in transaction.edus]: - self.received_edu( - transaction.origin, - edu.edu_type, - edu.content - ) - - results = yield defer.DeferredList(dl) - - ret = [] - for r in results: - if r[0]: - ret.append({}) - else: - logger.exception(r[1]) - ret.append({"error": str(r[1])}) - - logger.debug("Returning: %s", str(ret)) - - yield self.transaction_actions.set_response( - transaction, - 200, response - ) - defer.returnValue((200, response)) - - def received_edu(self, origin, edu_type, content): - if edu_type in self.edu_handlers: - self.edu_handlers[edu_type](origin, content) - else: - logger.warn("Received EDU of type %s with no handler", edu_type) - - @defer.inlineCallbacks - @log_function - def on_context_state_request(self, origin, room_id, event_id): - if event_id: - pdus = yield self.handler.get_state_for_pdu( - origin, room_id, event_id, - ) - auth_chain = yield self.store.get_auth_chain( - [pdu.event_id for pdu in pdus] - ) - else: - raise NotImplementedError("Specify an event") - - defer.returnValue((200, { - "pdus": [pdu.get_pdu_json() for pdu in pdus], - "auth_chain": [pdu.get_pdu_json() for pdu in auth_chain], - })) - - @defer.inlineCallbacks - @log_function - def on_pdu_request(self, origin, event_id): - pdu = yield self._get_persisted_pdu(origin, event_id) - - if pdu: - defer.returnValue( - (200, self._transaction_from_pdus([pdu]).get_dict()) - ) - else: - defer.returnValue((404, "")) - - @defer.inlineCallbacks - @log_function - def on_pull_request(self, origin, versions): - raise NotImplementedError("Pull transactions not implemented") - - @defer.inlineCallbacks - def on_query_request(self, query_type, args): - if query_type in self.query_handlers: - response = yield self.query_handlers[query_type](args) - defer.returnValue((200, response)) - else: - defer.returnValue( - (404, "No handler for Query type '%s'" % (query_type,)) - ) - - @defer.inlineCallbacks - def on_make_join_request(self, room_id, user_id): - pdu = yield self.handler.on_make_join_request(room_id, user_id) - time_now = self._clock.time_msec() - defer.returnValue({"event": pdu.get_pdu_json(time_now)}) - - @defer.inlineCallbacks - def on_invite_request(self, origin, content): - pdu = self.event_from_pdu_json(content) - ret_pdu = yield self.handler.on_invite_request(origin, pdu) - time_now = self._clock.time_msec() - defer.returnValue((200, {"event": ret_pdu.get_pdu_json(time_now)})) - - @defer.inlineCallbacks - def on_send_join_request(self, origin, content): - logger.debug("on_send_join_request: content: %s", content) - pdu = self.event_from_pdu_json(content) - logger.debug("on_send_join_request: pdu sigs: %s", pdu.signatures) - res_pdus = yield self.handler.on_send_join_request(origin, pdu) - time_now = self._clock.time_msec() - defer.returnValue((200, { - "state": [p.get_pdu_json(time_now) for p in res_pdus["state"]], - "auth_chain": [ - p.get_pdu_json(time_now) for p in res_pdus["auth_chain"] - ], - })) - - @defer.inlineCallbacks - def on_event_auth(self, origin, room_id, event_id): - time_now = self._clock.time_msec() - auth_pdus = yield self.handler.on_event_auth(event_id) - defer.returnValue((200, { - "auth_chain": [a.get_pdu_json(time_now) for a in auth_pdus], - })) - - @defer.inlineCallbacks - def make_join(self, destination, room_id, user_id): - ret = yield self.transport_layer.make_join( - destination, room_id, user_id - ) - - pdu_dict = ret["event"] - - logger.debug("Got response to make_join: %s", pdu_dict) - - defer.returnValue(self.event_from_pdu_json(pdu_dict)) - - @defer.inlineCallbacks - def send_join(self, destination, pdu): - time_now = self._clock.time_msec() - _, content = yield self.transport_layer.send_join( - destination=destination, - room_id=pdu.room_id, - event_id=pdu.event_id, - content=pdu.get_pdu_json(time_now), - ) - - logger.debug("Got content: %s", content) - - state = [ - self.event_from_pdu_json(p, outlier=True) - for p in content.get("state", []) - ] - - auth_chain = [ - self.event_from_pdu_json(p, outlier=True) - for p in content.get("auth_chain", []) - ] - - auth_chain.sort(key=lambda e: e.depth) - - defer.returnValue({ - "state": state, - "auth_chain": auth_chain, - }) - - @defer.inlineCallbacks - def send_invite(self, destination, room_id, event_id, pdu): - time_now = self._clock.time_msec() - code, content = yield self.transport_layer.send_invite( - destination=destination, - room_id=room_id, - event_id=event_id, - content=pdu.get_pdu_json(time_now), - ) - - pdu_dict = content["event"] - - logger.debug("Got response to send_invite: %s", pdu_dict) - - defer.returnValue(self.event_from_pdu_json(pdu_dict)) - - @log_function - def _get_persisted_pdu(self, origin, event_id, do_auth=True): - """ Get a PDU from the database with given origin and id. - - Returns: - Deferred: Results in a `Pdu`. - """ - return self.handler.get_persisted_pdu( - origin, event_id, do_auth=do_auth - ) - - def _transaction_from_pdus(self, pdu_list): - """Returns a new Transaction containing the given PDUs suitable for - transmission. - """ - time_now = self._clock.time_msec() - pdus = [p.get_pdu_json(time_now) for p in pdu_list] - return Transaction( - origin=self.server_name, - pdus=pdus, - origin_server_ts=int(time_now), - destination=None, - ) - - @defer.inlineCallbacks - @log_function - def _handle_new_pdu(self, origin, pdu, backfilled=False): - # We reprocess pdus when we have seen them only as outliers - existing = yield self._get_persisted_pdu( - origin, pdu.event_id, do_auth=False - ) - - already_seen = ( - existing and ( - not existing.internal_metadata.is_outlier() - or pdu.internal_metadata.is_outlier() - ) - ) - if already_seen: - logger.debug("Already seen pdu %s", pdu.event_id) - defer.returnValue({}) - return - - state = None - - auth_chain = [] - - # We need to make sure we have all the auth events. - # for e_id, _ in pdu.auth_events: - # exists = yield self._get_persisted_pdu( - # origin, - # e_id, - # do_auth=False - # ) - # - # if not exists: - # try: - # logger.debug( - # "_handle_new_pdu fetch missing auth event %s from %s", - # e_id, - # origin, - # ) - # - # yield self.get_pdu( - # origin, - # event_id=e_id, - # outlier=True, - # ) - # - # logger.debug("Processed pdu %s", e_id) - # except: - # logger.warn( - # "Failed to get auth event %s from %s", - # e_id, - # origin - # ) - - # Get missing pdus if necessary. - if not pdu.internal_metadata.is_outlier(): - # We only backfill backwards to the min depth. - min_depth = yield self.handler.get_min_depth_for_context( - pdu.room_id - ) - - logger.debug( - "_handle_new_pdu min_depth for %s: %d", - pdu.room_id, min_depth - ) - - if min_depth and pdu.depth > min_depth: - for event_id, hashes in pdu.prev_events: - exists = yield self._get_persisted_pdu( - origin, - event_id, - do_auth=False - ) - - if not exists: - logger.debug( - "_handle_new_pdu requesting pdu %s", - event_id - ) - - try: - yield self.get_pdu( - origin, - event_id=event_id, - ) - logger.debug("Processed pdu %s", event_id) - except: - # TODO(erikj): Do some more intelligent retries. - logger.exception("Failed to get PDU") - else: - # We need to get the state at this event, since we have reached - # a backward extremity edge. - logger.debug( - "_handle_new_pdu getting state for %s", - pdu.room_id - ) - state, auth_chain = yield self.get_state_for_room( - origin, pdu.room_id, pdu.event_id, - ) - - if not backfilled: - ret = yield self.handler.on_receive_pdu( - origin, - pdu, - backfilled=backfilled, - state=state, - auth_chain=auth_chain, - ) - else: - ret = None - - # yield self.pdu_actions.mark_as_processed(pdu) + self.transaction_actions = TransactionActions(self.store) + self._transaction_queue = TransactionQueue(hs, transport_layer) - defer.returnValue(ret) + self._order = 0 def __str__(self): return "<ReplicationLayer(%s)>" % self.server_name - - def event_from_pdu_json(self, pdu_json, outlier=False): - event = FrozenEvent( - pdu_json - ) - - event.internal_metadata.outlier = outlier - - return event |