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Merge branch 'develop' of github.com:matrix-org/synapse into events_refactor

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This commit is contained in:
Erik Johnston 2014-12-10 13:18:40 +00:00
commit aae8a37e63
15 changed files with 311 additions and 27 deletions
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37
docs/code_style.rst
View File

@ -1,10 +1,14 @@
Basically, PEP8
- Max line width: 80 chars.
- NEVER tabs. 4 spaces to indent.
- Max line width: 79 chars (with flexibility to overflow by a "few chars" if
the overflowing content is not semantically significant and avoids an
explosion of vertical whitespace).
- Use camel case for class and type names
- Use underscores for functions and variables.
- Use double quotes.
- Use parentheses instead of '\' for line continuation where ever possible (which is pretty much everywhere)
- Use parentheses instead of '\\' for line continuation where ever possible
(which is pretty much everywhere)
- There should be max a single new line between:
- statements
- functions in a class
@ -14,5 +18,32 @@ Basically, PEP8
- a single space after a comma
- a single space before and after for '=' when used as assignment
- no spaces before and after for '=' for default values and keyword arguments.
- Indenting must follow PEP8; either hanging indent or multiline-visual indent
depending on the size and shape of the arguments and what makes more sense to
the author. In other words, both this::
Comments should follow the google code style. This is so that we can generate documentation with sphinx (http://sphinxcontrib-napoleon.readthedocs.org/en/latest/)
print("I am a fish %s", "moo")
and this::
print("I am a fish %s",
"moo")
and this::
print(
"I am a fish %s",
"moo"
)
...are valid, although given each one takes up 2x more vertical space than
the previous, it's up to the author's discretion as to which layout makes most
sense for their function invocation. (e.g. if they want to add comments
per-argument, or put expressions in the arguments, or group related arguments
together, or want to deliberately extend or preserve vertical/horizontal
space)
Comments should follow the google code style. This is so that we can generate
documentation with sphinx (http://sphinxcontrib-napoleon.readthedocs.org/en/latest/)
Code should pass pep8 --max-line-length=100 without any warnings.

93
synapse/federation/replication.py
View File

@ -336,7 +336,7 @@ class ReplicationLayer(object):
defer.returnValue(response)
return
logger.debug("[%s] Transacition is new", transaction.transaction_id)
logger.debug("[%s] Transaction is new", transaction.transaction_id)
with PreserveLoggingContext():
dl = []
@ -690,6 +690,7 @@ class _TransactionQueue(object):
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
@ -731,8 +732,14 @@ class _TransactionQueue(object):
(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)
self._attempt_new_transaction(destination).addErrback(eb)
deferreds.append(deferred)
@ -742,6 +749,9 @@ class _TransactionQueue(object):
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)
@ -751,7 +761,7 @@ class _TransactionQueue(object):
if not deferred.called:
deferred.errback(failure)
else:
logger.exception("Failed to send edu", failure)
logger.warn("Failed to send edu", failure)
with PreserveLoggingContext():
self._attempt_new_transaction(destination).addErrback(eb)
@ -773,10 +783,33 @@ class _TransactionQueue(object):
@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)
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)
# 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, [])
@ -784,7 +817,14 @@ class _TransactionQueue(object):
if not pending_pdus and not pending_edus and not pending_failures:
return
logger.debug("TX [%s] Attempting new transaction", destination)
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])
@ -817,7 +857,11 @@ class _TransactionQueue(object):
yield self.transaction_actions.prepare_to_send(transaction)
logger.debug("TX [%s] Persisted transaction", destination)
logger.debug("TX [%s] Sending transaction...", destination)
logger.info(
"TX [%s] Sending transaction [%s]",
destination,
transaction.transaction_id,
)
# Actually send the transaction
@ -838,6 +882,8 @@ class _TransactionQueue(object):
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)
@ -850,8 +896,14 @@ class _TransactionQueue(object):
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
@ -864,11 +916,15 @@ class _TransactionQueue(object):
logger.debug("TX [%s] Yielded to callbacks", destination)
except Exception as e:
logger.error("TX Problem in _attempt_transaction")
# We capture this here as there as nothing actually listens
# for this finishing functions deferred.
logger.exception(e)
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:
@ -880,3 +936,22 @@ class _TransactionQueue(object):
# 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
)

2
synapse/federation/transport.py
View File

@ -155,7 +155,7 @@ class TransportLayer(object):
@defer.inlineCallbacks
@log_function
def send_transaction(self, transaction, json_data_callback=None):
""" Sends the given Transaction to it's destination
""" Sends the given Transaction to its destination
Args:
transaction (Transaction)

7
synapse/handlers/federation.py
View File

@ -203,6 +203,13 @@ class FederationHandler(BaseHandler):
e.msg,
affected=event.event_id,
)
# if we're receiving valid events from an origin,
# it's probably a good idea to mark it as not in retry-state
# for sending (although this is a bit of a leap)
retry_timings = yield self.store.get_destination_retry_timings(origin)
if (retry_timings and retry_timings.retry_last_ts):
self.store.set_destination_retry_timings(origin, 0, 0)
room = yield self.store.get_room(event.room_id)

35
synapse/http/matrixfederationclient.py
View File

@ -89,8 +89,8 @@ class MatrixFederationHttpClient(object):
("", "", path_bytes, param_bytes, query_bytes, "",)
)
logger.debug("Sending request to %s: %s %s",
destination, method, url_bytes)
logger.info("Sending request to %s: %s %s",
destination, method, url_bytes)
logger.debug(
"Types: %s",
@ -101,6 +101,8 @@ class MatrixFederationHttpClient(object):
]
)
# XXX: Would be much nicer to retry only at the transaction-layer
# (once we have reliable transactions in place)
retries_left = 5
endpoint = self._getEndpoint(reactor, destination)
@ -127,11 +129,20 @@ class MatrixFederationHttpClient(object):
break
except Exception as e:
if not retry_on_dns_fail and isinstance(e, DNSLookupError):
logger.warn("DNS Lookup failed to %s with %s", destination,
e)
logger.warn(
"DNS Lookup failed to %s with %s",
destination,
e
)
raise SynapseError(400, "Domain specified not found.")
logger.exception("Got error in _create_request")
logger.warn(
"Sending request failed to %s: %s %s : %s",
destination,
method,
url_bytes,
e
)
_print_ex(e)
if retries_left:
@ -140,15 +151,21 @@ class MatrixFederationHttpClient(object):
else:
raise
logger.info(
"Received response %d %s for %s: %s %s",
response.code,
response.phrase,
destination,
method,
url_bytes
)
if 200 <= response.code < 300:
# We need to update the transactions table to say it was sent?
pass
else:
# :'(
# Update transactions table?
logger.error(
"Got response %d %s", response.code, response.phrase
)
raise CodeMessageException(
response.code, response.phrase
)
@ -284,7 +301,7 @@ def _print_ex(e):
for ex in e.reasons:
_print_ex(ex)
else:
logger.exception(e)
logger.warn(e)
class _JsonProducer(object):

2
synapse/rest/transactions.py
View File

@ -19,7 +19,7 @@ import logging
logger = logging.getLogger(__name__)
# FIXME: elsewhere we use FooStore to indicate something in the storage layer...
class HttpTransactionStore(object):
def __init__(self):

2
synapse/storage/__init__.py
View File

@ -68,7 +68,7 @@ SCHEMAS = [
# Remember to update this number every time an incompatible change is made to
# database schema files, so the users will be informed on server restarts.
SCHEMA_VERSION = 8
SCHEMA_VERSION = 9
class _RollbackButIsFineException(Exception):

2
synapse/storage/_base.py
View File

@ -608,7 +608,7 @@ class JoinHelper(object):
to dump the results into.
Attributes:
taples (list): List of `Table` classes
tables (list): List of `Table` classes
EntryType (type)
"""

23
synapse/storage/schema/delta/v9.sql Normal file
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@ -0,0 +1,23 @@
/* Copyright 2014 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.
*/
-- To track destination health
CREATE TABLE IF NOT EXISTS destinations(
destination TEXT PRIMARY KEY,
retry_last_ts INTEGER,
retry_interval INTEGER
);
PRAGMA user_version = 9;

6
synapse/storage/schema/transactions.sql
View File

@ -59,3 +59,9 @@ CREATE INDEX IF NOT EXISTS transaction_id_to_pdu_tx ON transaction_id_to_pdu(tra
CREATE INDEX IF NOT EXISTS transaction_id_to_pdu_dest ON transaction_id_to_pdu(destination);
CREATE INDEX IF NOT EXISTS transaction_id_to_pdu_index ON transaction_id_to_pdu(transaction_id, destination);
-- To track destination health
CREATE TABLE IF NOT EXISTS destinations(
destination TEXT PRIMARY KEY,
retry_last_ts INTEGER,
retry_interval INTEGER
);

106
synapse/storage/transactions.py
View File

@ -17,6 +17,8 @@ from ._base import SQLBaseStore, Table
from collections import namedtuple
from twisted.internet import defer
import logging
logger = logging.getLogger(__name__)
@ -26,6 +28,10 @@ class TransactionStore(SQLBaseStore):
"""A collection of queries for handling PDUs.
"""
# a write-through cache of DestinationsTable.EntryType indexed by
# destination string
destination_retry_cache = {}
def get_received_txn_response(self, transaction_id, origin):
"""For an incoming transaction from a given origin, check if we have
already responded to it. If so, return the response code and response
@ -114,7 +120,7 @@ class TransactionStore(SQLBaseStore):
def _prep_send_transaction(self, txn, transaction_id, destination,
origin_server_ts):
# First we find out what the prev_txs should be.
# First we find out what the prev_txns should be.
# Since we know that we are only sending one transaction at a time,
# we can simply take the last one.
query = "%s ORDER BY id DESC LIMIT 1" % (
@ -205,6 +211,92 @@ class TransactionStore(SQLBaseStore):
return ReceivedTransactionsTable.decode_results(txn.fetchall())
def get_destination_retry_timings(self, destination):
"""Gets the current retry timings (if any) for a given destination.
Args:
destination (str)
Returns:
None if not retrying
Otherwise a DestinationsTable.EntryType for the retry scheme
"""
if destination in self.destination_retry_cache:
return defer.succeed(self.destination_retry_cache[destination])
return self.runInteraction(
"get_destination_retry_timings",
self._get_destination_retry_timings, destination)
def _get_destination_retry_timings(cls, txn, destination):
query = DestinationsTable.select_statement("destination = ?")
txn.execute(query, (destination,))
result = txn.fetchall()
if result:
result = DestinationsTable.decode_single_result(result)
if result.retry_last_ts > 0:
return result
else:
return None
def set_destination_retry_timings(self, destination,
retry_last_ts, retry_interval):
"""Sets the current retry timings for a given destination.
Both timings should be zero if retrying is no longer occuring.
Args:
destination (str)
retry_last_ts (int) - time of last retry attempt in unix epoch ms
retry_interval (int) - how long until next retry in ms
"""
self.destination_retry_cache[destination] = (
DestinationsTable.EntryType(
destination,
retry_last_ts,
retry_interval
)
)
# XXX: we could chose to not bother persisting this if our cache thinks
# this is a NOOP
return self.runInteraction(
"set_destination_retry_timings",
self._set_destination_retry_timings,
destination,
retry_last_ts,
retry_interval,
)
def _set_destination_retry_timings(cls, txn, destination,
retry_last_ts, retry_interval):
query = (
"INSERT OR REPLACE INTO %s "
"(destination, retry_last_ts, retry_interval) "
"VALUES (?, ?, ?) "
) % DestinationsTable.table_name
txn.execute(query, (destination, retry_last_ts, retry_interval))
def get_destinations_needing_retry(self):
"""Get all destinations which are due a retry for sending a transaction.
Returns:
list: A list of `DestinationsTable.EntryType`
"""
return self.runInteraction(
"get_destinations_needing_retry",
self._get_destinations_needing_retry
)
def _get_destinations_needing_retry(cls, txn):
where = "retry_last_ts > 0 and retry_next_ts < now()"
query = DestinationsTable.select_statement(where)
txn.execute(query)
return DestinationsTable.decode_results(txn.fetchall())
class ReceivedTransactionsTable(Table):
table_name = "received_transactions"
@ -247,3 +339,15 @@ class TransactionsToPduTable(Table):
]
EntryType = namedtuple("TransactionsToPduEntry", fields)
class DestinationsTable(Table):
table_name = "destinations"
fields = [
"destination",
"retry_last_ts",
"retry_interval",
]
EntryType = namedtuple("DestinationsEntry", fields)

5
tests/federation/test_federation.py
View File

@ -25,6 +25,7 @@ from synapse.server import HomeServer
from synapse.federation import initialize_http_replication
from synapse.api.events import SynapseEvent
from synapse.storage.transactions import DestinationsTable
def make_pdu(prev_pdus=[], **kwargs):
"""Provide some default fields for making a PduTuple."""
@ -55,10 +56,14 @@ class FederationTestCase(unittest.TestCase):
"delivered_txn",
"get_received_txn_response",
"set_received_txn_response",
"get_destination_retry_timings",
])
self.mock_persistence.get_received_txn_response.return_value = (
defer.succeed(None)
)
self.mock_persistence.get_destination_retry_timings.return_value = (
defer.succeed(DestinationsTable.EntryType("", 0, 0))
)
self.mock_config = Mock()
self.mock_config.signing_key = [MockKey()]
self.clock = MockClock()

2
tests/handlers/test_federation.py
View File

@ -53,6 +53,8 @@ class FederationTestCase(unittest.TestCase):
"persist_event",
"store_room",
"get_room",
"get_destination_retry_timings",
"set_destination_retry_timings",
]),
resource_for_federation=NonCallableMock(),
http_client=NonCallableMock(spec_set=[]),

10
tests/handlers/test_presence.py
View File

@ -30,7 +30,7 @@ from synapse.api.constants import PresenceState
from synapse.api.errors import SynapseError
from synapse.handlers.presence import PresenceHandler, UserPresenceCache
from synapse.streams.config import SourcePaginationConfig
from synapse.storage.transactions import DestinationsTable
OFFLINE = PresenceState.OFFLINE
UNAVAILABLE = PresenceState.UNAVAILABLE
@ -528,6 +528,7 @@ class PresencePushTestCase(unittest.TestCase):
"delivered_txn",
"get_received_txn_response",
"set_received_txn_response",
"get_destination_retry_timings",
]),
handlers=None,
resource_for_client=Mock(),
@ -539,6 +540,9 @@ class PresencePushTestCase(unittest.TestCase):
hs.handlers = JustPresenceHandlers(hs)
self.datastore = hs.get_datastore()
self.datastore.get_destination_retry_timings.return_value = (
defer.succeed(DestinationsTable.EntryType("", 0, 0))
)
def get_received_txn_response(*args):
return defer.succeed(None)
@ -1037,6 +1041,7 @@ class PresencePollingTestCase(unittest.TestCase):
"delivered_txn",
"get_received_txn_response",
"set_received_txn_response",
"get_destination_retry_timings",
]),
handlers=None,
resource_for_client=Mock(),
@ -1048,6 +1053,9 @@ class PresencePollingTestCase(unittest.TestCase):
hs.handlers = JustPresenceHandlers(hs)
self.datastore = hs.get_datastore()
self.datastore.get_destination_retry_timings.return_value = (
defer.succeed(DestinationsTable.EntryType("", 0, 0))
)
def get_received_txn_response(*args):
return defer.succeed(None)

6
tests/handlers/test_typing.py
View File

@ -25,6 +25,8 @@ from ..utils import MockHttpResource, MockClock, DeferredMockCallable, MockKey
from synapse.server import HomeServer
from synapse.handlers.typing import TypingNotificationHandler
from synapse.storage.transactions import DestinationsTable
def _expect_edu(destination, edu_type, content, origin="test"):
return {
@ -72,6 +74,7 @@ class TypingNotificationsTestCase(unittest.TestCase):
"delivered_txn",
"get_received_txn_response",
"set_received_txn_response",
"get_destination_retry_timings",
]),
handlers=None,
resource_for_client=Mock(),
@ -89,6 +92,9 @@ class TypingNotificationsTestCase(unittest.TestCase):
self.handler.push_update_to_clients = self.mock_update_client
self.datastore = hs.get_datastore()
self.datastore.get_destination_retry_timings.return_value = (
defer.succeed(DestinationsTable.EntryType("", 0, 0))
)
def get_received_txn_response(*args):
return defer.succeed(None)