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Code style.

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This commit is contained in:
Erik Johnston 2014-12-10 10:16:09 +00:00
parent 71da2bed55
commit b8d30899b1
3 changed files with 85 additions and 46 deletions
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52
synapse/federation/replication.py
View file

@ -728,7 +728,7 @@ class _TransactionQueue(object):
self.pending_pdus_by_dest.setdefault(destination, []).append(
(pdu, deferred, order)
)
def eb(failure):
if not deferred.called:
deferred.errback(failure)
@ -745,7 +745,7 @@ class _TransactionQueue(object):
# NO inlineCallbacks
def enqueue_edu(self, edu):
destination = edu.destination
if destination == self.server_name:
return
@ -776,7 +776,7 @@ class _TransactionQueue(object):
)
yield deferred
@defer.inlineCallbacks
@log_function
def _attempt_new_transaction(self, destination):
@ -790,12 +790,15 @@ class _TransactionQueue(object):
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)
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.
@ -811,10 +814,14 @@ class _TransactionQueue(object):
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)",
logger.debug(
"TX [%s] Attempting new transaction "
"(pdus: %d, edus: %d, failures: %d)",
destination,
len(pending_pdus), len(pending_edus), len(pending_failures))
len(pending_pdus),
len(pending_edus),
len(pending_failures)
)
# Sort based on the order field
pending_pdus.sort(key=lambda t: t[2])
@ -847,8 +854,11 @@ class _TransactionQueue(object):
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)
logger.info(
"TX [%s] Sending transaction [%s]",
destination,
transaction.transaction_id,
)
# Actually send the transaction
@ -905,11 +915,14 @@ class _TransactionQueue(object):
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)
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)
@ -925,12 +938,17 @@ class _TransactionQueue(object):
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)
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
)

29
synapse/http/matrixfederationclient.py
View file

@ -130,12 +130,20 @@ 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.warn("Sending request failed to %s: %s %s : %s",
destination, method, url_bytes, e)
logger.warn(
"Sending request failed to %s: %s %s : %s",
destination,
method,
url_bytes,
e
)
_print_ex(e)
if retries_left:
@ -144,10 +152,15 @@ class MatrixFederationHttpClient(object):
else:
raise
logger.info("Received response %d %s for %s: %s %s",
response.code, response.phrase,
destination, method, url_bytes)
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

50
synapse/storage/transactions.py
View file

@ -27,7 +27,7 @@ logger = logging.getLogger(__name__)
class TransactionStore(SQLBaseStore):
"""A collection of queries for handling PDUs.
"""
# a write-through cache of DestinationsTable.EntryType indexed by
# destination string
destination_retry_cache = {}
@ -213,21 +213,21 @@ class TransactionStore(SQLBaseStore):
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,))
@ -238,30 +238,36 @@ class TransactionStore(SQLBaseStore):
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)
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)
self._set_destination_retry_timings,
destination,
retry_last_ts,
retry_interval,
)
def _set_destination_retry_timings(cls, txn, destination,
retry_last_ts, retry_interval):
@ -275,21 +281,22 @@ class TransactionStore(SQLBaseStore):
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())
return DestinationsTable.decode_results(txn.fetchall())
class ReceivedTransactionsTable(Table):
table_name = "received_transactions"
@ -332,14 +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)
EntryType = namedtuple("DestinationsEntry", fields)