diff --git a/synapse/http/server.py b/synapse/http/server.py
index 55b9ad5251..f29e36f490 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -18,6 +18,9 @@
from synapse.api.errors import (
cs_exception, SynapseError, CodeMessageException, UnrecognizedRequestError, Codes
)
+from synapse.http.request_metrics import (
+ requests_counter,
+)
from synapse.util.logcontext import LoggingContext, PreserveLoggingContext
from synapse.util.caches import intern_dict
from synapse.util.metrics import Measure
@@ -41,178 +44,105 @@ import simplejson
logger = logging.getLogger(__name__)
-metrics = synapse.metrics.get_metrics_for(__name__)
-
-# total number of responses served, split by method/servlet/tag
-response_count = metrics.register_counter(
- "response_count",
- labels=["method", "servlet", "tag"],
- alternative_names=(
- # the following are all deprecated aliases for the same metric
- metrics.name_prefix + x for x in (
- "_requests",
- "_response_time:count",
- "_response_ru_utime:count",
- "_response_ru_stime:count",
- "_response_db_txn_count:count",
- "_response_db_txn_duration:count",
- )
- )
-)
-
-requests_counter = metrics.register_counter(
- "requests_received",
- labels=["method", "servlet", ],
-)
-
-outgoing_responses_counter = metrics.register_counter(
- "responses",
- labels=["method", "code"],
-)
-
-response_timer = metrics.register_counter(
- "response_time_seconds",
- labels=["method", "servlet", "tag"],
- alternative_names=(
- metrics.name_prefix + "_response_time:total",
- ),
-)
-
-response_ru_utime = metrics.register_counter(
- "response_ru_utime_seconds", labels=["method", "servlet", "tag"],
- alternative_names=(
- metrics.name_prefix + "_response_ru_utime:total",
- ),
-)
-
-response_ru_stime = metrics.register_counter(
- "response_ru_stime_seconds", labels=["method", "servlet", "tag"],
- alternative_names=(
- metrics.name_prefix + "_response_ru_stime:total",
- ),
-)
-
-response_db_txn_count = metrics.register_counter(
- "response_db_txn_count", labels=["method", "servlet", "tag"],
- alternative_names=(
- metrics.name_prefix + "_response_db_txn_count:total",
- ),
-)
-# seconds spent waiting for db txns, excluding scheduling time, when processing
-# this request
-response_db_txn_duration = metrics.register_counter(
- "response_db_txn_duration_seconds", labels=["method", "servlet", "tag"],
- alternative_names=(
- metrics.name_prefix + "_response_db_txn_duration:total",
- ),
-)
+def wrap_json_request_handler(h):
+ """Wraps a request handler method with exception handling.
-# seconds spent waiting for a db connection, when processing this request
-response_db_sched_duration = metrics.register_counter(
- "response_db_sched_duration_seconds", labels=["method", "servlet", "tag"]
-)
+ Also adds logging as per wrap_request_handler_with_logging.
-# size in bytes of the response written
-response_size = metrics.register_counter(
- "response_size", labels=["method", "servlet", "tag"]
-)
+ The handler method must have a signature of "handle_foo(self, request)",
+ where "self" must have "version_string" and "clock" attributes (and
+ "request" must be a SynapseRequest).
-_next_request_id = 0
+ The handler must return a deferred. If the deferred succeeds we assume that
+ a response has been sent. If the deferred fails with a SynapseError we use
+ it to send a JSON response with the appropriate HTTP reponse code. If the
+ deferred fails with any other type of error we send a 500 reponse.
+ """
+ @defer.inlineCallbacks
+ def wrapped_request_handler(self, request):
+ try:
+ yield h(self, request)
+ except CodeMessageException as e:
+ code = e.code
+ if isinstance(e, SynapseError):
+ logger.info(
+ "%s SynapseError: %s - %s", request, code, e.msg
+ )
+ else:
+ logger.exception(e)
+ respond_with_json(
+ request, code, cs_exception(e), send_cors=True,
+ pretty_print=_request_user_agent_is_curl(request),
+ version_string=self.version_string,
+ )
-def request_handler(include_metrics=False):
- """Decorator for ``wrap_request_handler``"""
- return lambda request_handler: wrap_request_handler(request_handler, include_metrics)
+ except Exception:
+ # failure.Failure() fishes the original Failure out
+ # of our stack, and thus gives us a sensible stack
+ # trace.
+ f = failure.Failure()
+ logger.error(
+ "Failed handle request via %r: %r: %s",
+ h,
+ request,
+ f.getTraceback().rstrip(),
+ )
+ respond_with_json(
+ request,
+ 500,
+ {
+ "error": "Internal server error",
+ "errcode": Codes.UNKNOWN,
+ },
+ send_cors=True,
+ pretty_print=_request_user_agent_is_curl(request),
+ version_string=self.version_string,
+ )
+ return wrap_request_handler_with_logging(wrapped_request_handler)
-def wrap_request_handler(request_handler, include_metrics=False):
- """Wraps a method that acts as a request handler with the necessary logging
- and exception handling.
- The method must have a signature of "handle_foo(self, request)". The
- argument "self" must have "version_string" and "clock" attributes. The
- argument "request" must be a twisted HTTP request.
+def wrap_request_handler_with_logging(h):
+ """Wraps a request handler to provide logging and metrics
- The method must return a deferred. If the deferred succeeds we assume that
- a response has been sent. If the deferred fails with a SynapseError we use
- it to send a JSON response with the appropriate HTTP reponse code. If the
- deferred fails with any other type of error we send a 500 reponse.
+ The handler method must have a signature of "handle_foo(self, request)",
+ where "self" must have a "clock" attribute (and "request" must be a
+ SynapseRequest).
- We insert a unique request-id into the logging context for this request and
- log the response and duration for this request.
+ As well as calling `request.processing` (which will log the response and
+ duration for this request), the wrapped request handler will insert the
+ request id into the logging context.
"""
-
@defer.inlineCallbacks
def wrapped_request_handler(self, request):
- global _next_request_id
- request_id = "%s-%s" % (request.method, _next_request_id)
- _next_request_id += 1
+ """
+ Args:
+ self:
+ request (synapse.http.site.SynapseRequest):
+ """
+ request_id = request.get_request_id()
with LoggingContext(request_id) as request_context:
+ request_context.request = request_id
with Measure(self.clock, "wrapped_request_handler"):
- request_metrics = RequestMetrics()
# we start the request metrics timer here with an initial stab
# at the servlet name. For most requests that name will be
# JsonResource (or a subclass), and JsonResource._async_render
# will update it once it picks a servlet.
servlet_name = self.__class__.__name__
- request_metrics.start(self.clock, name=servlet_name)
-
- request_context.request = request_id
- with request.processing():
- try:
- with PreserveLoggingContext(request_context):
- if include_metrics:
- yield request_handler(self, request, request_metrics)
- else:
- requests_counter.inc(request.method, servlet_name)
- yield request_handler(self, request)
- except CodeMessageException as e:
- code = e.code
- if isinstance(e, SynapseError):
- logger.info(
- "%s SynapseError: %s - %s", request, code, e.msg
- )
- else:
- logger.exception(e)
- outgoing_responses_counter.inc(request.method, str(code))
- respond_with_json(
- request, code, cs_exception(e), send_cors=True,
- pretty_print=_request_user_agent_is_curl(request),
- version_string=self.version_string,
- )
- except Exception:
- # failure.Failure() fishes the original Failure out
- # of our stack, and thus gives us a sensible stack
- # trace.
- f = failure.Failure()
- logger.error(
- "Failed handle request %s.%s on %r: %r: %s",
- request_handler.__module__,
- request_handler.__name__,
- self,
- request,
- f.getTraceback().rstrip(),
- )
- respond_with_json(
- request,
- 500,
- {
- "error": "Internal server error",
- "errcode": Codes.UNKNOWN,
- },
- send_cors=True,
- pretty_print=_request_user_agent_is_curl(request),
- version_string=self.version_string,
- )
- finally:
- try:
- request_metrics.stop(
- self.clock, request
- )
- except Exception as e:
- logger.warn("Failed to stop metrics: %r", e)
+ with request.processing(servlet_name):
+ with PreserveLoggingContext(request_context):
+ d = h(self, request)
+
+ # record the arrival of the request *after*
+ # dispatching to the handler, so that the handler
+ # can update the servlet name in the request
+ # metrics
+ requests_counter.inc(request.method,
+ request.request_metrics.name)
+ yield d
return wrapped_request_handler
@@ -278,13 +208,9 @@ class JsonResource(HttpServer, resource.Resource):
self._async_render(request)
return server.NOT_DONE_YET
- # Disable metric reporting because _async_render does its own metrics.
- # It does its own metric reporting because _async_render dispatches to
- # a callback and it's the class name of that callback we want to report
- # against rather than the JsonResource itself.
- @request_handler(include_metrics=True)
+ @wrap_json_request_handler
@defer.inlineCallbacks
- def _async_render(self, request, request_metrics):
+ def _async_render(self, request):
""" This gets called from render() every time someone sends us a request.
This checks if anyone has registered a callback for that method and
path.
@@ -296,9 +222,7 @@ class JsonResource(HttpServer, resource.Resource):
servlet_classname = servlet_instance.__class__.__name__
else:
servlet_classname = "%r" % callback
-
- request_metrics.name = servlet_classname
- requests_counter.inc(request.method, servlet_classname)
+ request.request_metrics.name = servlet_classname
# Now trigger the callback. If it returns a response, we send it
# here. If it throws an exception, that is handled by the wrapper
@@ -345,8 +269,6 @@ class JsonResource(HttpServer, resource.Resource):
def _send_response(self, request, code, response_json_object,
response_code_message=None):
- outgoing_responses_counter.inc(request.method, str(code))
-
# TODO: Only enable CORS for the requests that need it.
respond_with_json(
request, code, response_json_object,
@@ -386,54 +308,6 @@ def _unrecognised_request_handler(request):
raise UnrecognizedRequestError()
-class RequestMetrics(object):
- def start(self, clock, name):
- self.start = clock.time_msec()
- self.start_context = LoggingContext.current_context()
- self.name = name
-
- def stop(self, clock, request):
- context = LoggingContext.current_context()
-
- tag = ""
- if context:
- tag = context.tag
-
- if context != self.start_context:
- logger.warn(
- "Context have unexpectedly changed %r, %r",
- context, self.start_context
- )
- return
-
- response_count.inc(request.method, self.name, tag)
-
- response_timer.inc_by(
- clock.time_msec() - self.start, request.method,
- self.name, tag
- )
-
- ru_utime, ru_stime = context.get_resource_usage()
-
- response_ru_utime.inc_by(
- ru_utime, request.method, self.name, tag
- )
- response_ru_stime.inc_by(
- ru_stime, request.method, self.name, tag
- )
- response_db_txn_count.inc_by(
- context.db_txn_count, request.method, self.name, tag
- )
- response_db_txn_duration.inc_by(
- context.db_txn_duration_ms / 1000., request.method, self.name, tag
- )
- response_db_sched_duration.inc_by(
- context.db_sched_duration_ms / 1000., request.method, self.name, tag
- )
-
- response_size.inc_by(request.sentLength, request.method, self.name, tag)
-
-
class RootRedirect(resource.Resource):
"""Redirects the root '/' path to another path."""
|
