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Fix blocking of gRPC stream-to-stream requests when elasticapm is enabled #1967

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merged 2 commits into from
Feb 13, 2024
Merged

Fix blocking of gRPC stream-to-stream requests when elasticapm is enabled #1967

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16a60b2
Fix gprc support with streaming requests (#1966)
psydok Feb 12, 2024
f67a2a7
Update version.py
psydok Feb 12, 2024
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20 changes: 13 additions & 7 deletions elasticapm/contrib/grpc/async_server_interceptor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -33,20 +33,18 @@
import grpc

import elasticapm
from elasticapm.contrib.grpc.server_interceptor import _ServicerContextWrapper, _wrap_rpc_behavior, get_trace_parent
from elasticapm.contrib.grpc.server_interceptor import _ServicerContextWrapper, get_trace_parent


class _AsyncServerInterceptor(grpc.aio.ServerInterceptor):
async def intercept_service(self, continuation, handler_call_details):
def transaction_wrapper(behavior, request_streaming, response_streaming):
async def _interceptor(request_or_iterator, context):
if request_streaming or response_streaming: # only unary-unary is supported
return behavior(request_or_iterator, context)
def wrap_unary_unary(behavior):
async def _interceptor(request, context):
tp = get_trace_parent(handler_call_details)
client = elasticapm.get_client()
transaction = client.begin_transaction("request", trace_parent=tp)
try:
result = behavior(request_or_iterator, _ServicerContextWrapper(context, transaction))
result = behavior(request, _ServicerContextWrapper(context, transaction))

# This is so we can support both sync and async rpc functions
if inspect.isawaitable(result):
Expand All @@ -65,4 +63,12 @@ async def _interceptor(request_or_iterator, context):

return _interceptor

return _wrap_rpc_behavior(await continuation(handler_call_details), transaction_wrapper)
handler = await continuation(handler_call_details)
if handler.request_streaming or handler.response_streaming:
return handler

return grpc.unary_unary_rpc_method_handler(
wrap_unary_unary(handler.unary_unary),
request_deserializer=handler.request_deserializer,
response_serializer=handler.response_serializer,
)
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