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metrics reporting fix for wallet servers

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This commit is contained in:
Lex Berezhny 2019-08-23 09:57:10 -04:00
parent ff4b2f2dec
commit 8a284d6c49
2 changed files with 20 additions and 8 deletions
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4
lbry/lbry/wallet/server/metrics.py
View file

@ -52,7 +52,7 @@ class APICallMetrics:
self.errored_queries = set()
self.interrupted_queries = set()
def to_json_and_reset(self):
def to_json(self):
return {
# total requests received
"receive_count": self.receive_count,
@ -128,7 +128,7 @@ class ServerLoadData:
def to_json_and_reset(self, status):
try:
return {
'api': {name: api.to_json_and_reset() for name, api in self._apis.items()},
'api': {name: api.to_json() for name, api in self._apis.items()},
'status': status
}
finally:

24
lbry/lbry/wallet/server/session.py
View file

@ -112,33 +112,44 @@ class LBRYElectrumX(ElectrumX):
}
self.request_handlers.update(handlers)
async def run_in_executor(self, metrics: APICallMetrics, func, kwargs):
def get_metrics_or_placeholder_for_api(self, query_name):
""" Do not hold on to a reference to the metrics
returned by this method past an `await` or
you may be working with a stale metrics object.
"""
if self.env.track_metrics:
return self.session_mgr.metrics.for_api(query_name)
else:
return APICallMetrics(query_name)
async def run_in_executor(self, query_name, func, kwargs):
start = time.perf_counter()
try:
result = await asyncio.get_running_loop().run_in_executor(
self.session_mgr.query_executor, func, kwargs
)
except reader.SQLiteInterruptedError as error:
metrics = self.get_metrics_or_placeholder_for_api(query_name)
metrics.query_interrupt(start, error.metrics)
raise RPCError(JSONRPC.QUERY_TIMEOUT, 'sqlite query timed out')
except reader.SQLiteOperationalError as error:
metrics = self.get_metrics_or_placeholder_for_api(query_name)
metrics.query_error(start, error.metrics)
raise RPCError(JSONRPC.INTERNAL_ERROR, 'query failed to execute')
except:
metrics = self.get_metrics_or_placeholder_for_api(query_name)
metrics.query_error(start, {})
raise RPCError(JSONRPC.INTERNAL_ERROR, 'unknown server error')
if self.env.track_metrics:
metrics = self.get_metrics_or_placeholder_for_api(query_name)
(result, metrics_data) = result
metrics.query_response(start, metrics_data)
return base64.b64encode(result).decode()
async def run_and_cache_query(self, query_name, function, kwargs):
if self.env.track_metrics:
metrics = self.session_mgr.metrics.for_api(query_name)
else:
metrics = APICallMetrics(query_name)
metrics = self.get_metrics_or_placeholder_for_api(query_name)
metrics.start()
cache = self.session_mgr.search_cache[query_name]
cache_key = str(kwargs)
@ -151,9 +162,10 @@ class LBRYElectrumX(ElectrumX):
async with cache_item.lock:
if cache_item.result is None:
cache_item.result = await self.run_in_executor(
metrics, function, kwargs
query_name, function, kwargs
)
else:
metrics = self.get_metrics_or_placeholder_for_api(query_name)
metrics.cache_response()
return cache_item.result