diff --git a/synapse/federation/replication.py b/synapse/federation/replication.py
index a4c29b484b..54a0c7ad8e 100644
--- a/synapse/federation/replication.py
+++ b/synapse/federation/replication.py
@@ -17,23 +17,20 @@
a given transport.
"""
-from twisted.internet import defer
+from .federation_client import FederationClient
+from .federation_server import FederationServer
-from .units import Transaction, Edu
+from .transaction_queue import TransactionQueue
from .persistence import TransactionActions
-from synapse.util.logutils import log_function
-from synapse.util.logcontext import PreserveLoggingContext
-from synapse.events import FrozenEvent
-
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.
@@ -54,922 +51,28 @@ class ReplicationLayer(object):
def __init__(self, hs, transport_layer):
self.server_name = hs.hostname
+ self.keyring = hs.get_keyring()
+
self.transport_layer = transport_layer
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_context(self, destination, context, event_id):
- """Requests all of the `current` state PDUs for a given context from
- a remote home server.
-
- Args:
- destination (str): The remote homeserver to query for the state.
- context (str): The context 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_context_state(
- destination,
- context,
- 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, context, event_id):
- res = yield self.transport_layer.get_event_auth(
- destination, context, 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, context, versions, limit):
- pdus = yield self.handler.on_backfill_request(
- origin, context, 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, context, event_id):
- if event_id:
- pdus = yield self.handler.get_state_for_pdu(
- origin,
- context,
- 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 transacions 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, context, user_id):
- pdu = yield self.handler.on_make_join_request(context, 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, context, 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, context, user_id):
- ret = yield self.transport_layer.make_join(
- destination=destination,
- context=context,
- user_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,
- pdu.room_id,
- pdu.event_id,
- 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", [])
- ]
-
- # FIXME: We probably want to do something with the auth_chain given
- # to us
-
- 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, context, event_id, pdu):
- time_now = self._clock.time_msec()
- code, content = yield self.transport_layer.send_invite(
- destination=destination,
- context=context,
- 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_context(
- 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
+ self.transaction_actions = TransactionActions(self.store)
+ self._transaction_queue = TransactionQueue(hs, transport_layer)
- # yield self.pdu_actions.mark_as_processed(pdu)
+ self._order = 0
- defer.returnValue(ret)
+ self.hs = hs
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
-
-
-class _TransactionQueue(object):
- """This class makes sure we only have one transaction in flight at
- a time for a given destination.
-
- It batches pending PDUs into single transactions.
- """
-
- def __init__(self, hs, transaction_actions, transport_layer):
- self.server_name = hs.hostname
- self.transaction_actions = transaction_actions
- self.transport_layer = transport_layer
-
- self._clock = hs.get_clock()
- self.store = hs.get_datastore()
-
- # Is a mapping from destinations -> deferreds. Used to keep track
- # of which destinations have transactions in flight and when they are
- # done
- self.pending_transactions = {}
-
- # Is a mapping from destination -> list of
- # tuple(pending pdus, deferred, order)
- self.pending_pdus_by_dest = {}
- # destination -> list of tuple(edu, deferred)
- self.pending_edus_by_dest = {}
-
- # destination -> list of tuple(failure, deferred)
- self.pending_failures_by_dest = {}
-
- # HACK to get unique tx id
- self._next_txn_id = int(self._clock.time_msec())
-
- @defer.inlineCallbacks
- @log_function
- def enqueue_pdu(self, pdu, destinations, order):
- # We loop through all destinations to see whether we already have
- # a transaction in progress. If we do, stick it in the pending_pdus
- # table and we'll get back to it later.
-
- destinations = set(destinations)
- destinations.discard(self.server_name)
- destinations.discard("localhost")
-
- logger.debug("Sending to: %s", str(destinations))
-
- if not destinations:
- return
-
- deferreds = []
-
- for destination in destinations:
- deferred = defer.Deferred()
- self.pending_pdus_by_dest.setdefault(destination, []).append(
- (pdu, deferred, order)
- )
-
- def eb(failure):
- if not deferred.called:
- deferred.errback(failure)
- else:
- logger.warn("Failed to send pdu", failure)
-
- with PreserveLoggingContext():
- self._attempt_new_transaction(destination).addErrback(eb)
-
- deferreds.append(deferred)
-
- yield defer.DeferredList(deferreds)
-
- # NO inlineCallbacks
- def enqueue_edu(self, edu):
- destination = edu.destination
-
- if destination == self.server_name:
- return
-
- deferred = defer.Deferred()
- self.pending_edus_by_dest.setdefault(destination, []).append(
- (edu, deferred)
- )
-
- def eb(failure):
- if not deferred.called:
- deferred.errback(failure)
- else:
- logger.warn("Failed to send edu", failure)
-
- with PreserveLoggingContext():
- self._attempt_new_transaction(destination).addErrback(eb)
-
- return deferred
-
- @defer.inlineCallbacks
- def enqueue_failure(self, failure, destination):
- deferred = defer.Deferred()
-
- self.pending_failures_by_dest.setdefault(
- destination, []
- ).append(
- (failure, deferred)
- )
-
- yield deferred
-
- @defer.inlineCallbacks
- @log_function
- def _attempt_new_transaction(self, destination):
-
- (retry_last_ts, retry_interval) = (0, 0)
- retry_timings = yield self.store.get_destination_retry_timings(
- destination
- )
- if retry_timings:
- (retry_last_ts, retry_interval) = (
- retry_timings.retry_last_ts, retry_timings.retry_interval
- )
- if retry_last_ts + retry_interval > int(self._clock.time_msec()):
- logger.info(
- "TX [%s] not ready for retry yet - "
- "dropping transaction for now",
- destination,
- )
- return
- else:
- logger.info("TX [%s] is ready for retry", destination)
-
- logger.info("TX [%s] _attempt_new_transaction", destination)
-
- if destination in self.pending_transactions:
- # XXX: pending_transactions can get stuck on by a never-ending
- # request at which point pending_pdus_by_dest just keeps growing.
- # we need application-layer timeouts of some flavour of these
- # requests
- return
-
- # list of (pending_pdu, deferred, order)
- pending_pdus = self.pending_pdus_by_dest.pop(destination, [])
- pending_edus = self.pending_edus_by_dest.pop(destination, [])
- pending_failures = self.pending_failures_by_dest.pop(destination, [])
-
- if pending_pdus:
- logger.info("TX [%s] len(pending_pdus_by_dest[dest]) = %d", destination, len(pending_pdus))
-
- if not pending_pdus and not pending_edus and not pending_failures:
- return
-
- logger.debug(
- "TX [%s] Attempting new transaction "
- "(pdus: %d, edus: %d, failures: %d)",
- destination,
- len(pending_pdus),
- len(pending_edus),
- len(pending_failures)
- )
-
- # Sort based on the order field
- pending_pdus.sort(key=lambda t: t[2])
-
- pdus = [x[0] for x in pending_pdus]
- edus = [x[0] for x in pending_edus]
- failures = [x[0].get_dict() for x in pending_failures]
- deferreds = [
- x[1]
- for x in pending_pdus + pending_edus + pending_failures
- ]
-
- try:
- self.pending_transactions[destination] = 1
-
- logger.debug("TX [%s] Persisting transaction...", destination)
-
- transaction = Transaction.create_new(
- origin_server_ts=int(self._clock.time_msec()),
- transaction_id=str(self._next_txn_id),
- origin=self.server_name,
- destination=destination,
- pdus=pdus,
- edus=edus,
- pdu_failures=failures,
- )
-
- self._next_txn_id += 1
-
- yield self.transaction_actions.prepare_to_send(transaction)
-
- logger.debug("TX [%s] Persisted transaction", destination)
- logger.info(
- "TX [%s] Sending transaction [%s]",
- destination,
- transaction.transaction_id,
- )
-
- # Actually send the transaction
-
- # FIXME (erikj): This is a bit of a hack to make the Pdu age
- # keys work
- def json_data_cb():
- data = transaction.get_dict()
- now = int(self._clock.time_msec())
- if "pdus" in data:
- for p in data["pdus"]:
- if "age_ts" in p:
- unsigned = p.setdefault("unsigned", {})
- unsigned["age"] = now - int(p["age_ts"])
- del p["age_ts"]
- return data
-
- code, response = yield self.transport_layer.send_transaction(
- transaction, json_data_cb
- )
-
- logger.info("TX [%s] got %d response", destination, code)
-
- logger.debug("TX [%s] Sent transaction", destination)
- logger.debug("TX [%s] Marking as delivered...", destination)
-
- yield self.transaction_actions.delivered(
- transaction, code, response
- )
-
- logger.debug("TX [%s] Marked as delivered", destination)
- logger.debug("TX [%s] Yielding to callbacks...", destination)
-
- for deferred in deferreds:
- if code == 200:
- if retry_last_ts:
- # this host is alive! reset retry schedule
- yield self.store.set_destination_retry_timings(
- destination, 0, 0
- )
- deferred.callback(None)
- else:
- self.set_retrying(destination, retry_interval)
- deferred.errback(RuntimeError("Got status %d" % code))
-
- # Ensures we don't continue until all callbacks on that
- # deferred have fired
- try:
- yield deferred
- except:
- pass
-
- logger.debug("TX [%s] Yielded to callbacks", destination)
-
- except Exception as e:
- # We capture this here as there as nothing actually listens
- # for this finishing functions deferred.
- logger.warn(
- "TX [%s] Problem in _attempt_transaction: %s",
- destination,
- e,
- )
-
- self.set_retrying(destination, retry_interval)
-
- for deferred in deferreds:
- if not deferred.called:
- deferred.errback(e)
-
- finally:
- # We want to be *very* sure we delete this after we stop processing
- self.pending_transactions.pop(destination, None)
-
- # Check to see if there is anything else to send.
- self._attempt_new_transaction(destination)
-
- @defer.inlineCallbacks
- def set_retrying(self, destination, retry_interval):
- # track that this destination is having problems and we should
- # give it a chance to recover before trying it again
-
- if retry_interval:
- retry_interval *= 2
- # plateau at hourly retries for now
- if retry_interval >= 60 * 60 * 1000:
- retry_interval = 60 * 60 * 1000
- else:
- retry_interval = 2000 # try again at first after 2 seconds
-
- yield self.store.set_destination_retry_timings(
- destination,
- int(self._clock.time_msec()),
- retry_interval
- )
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