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# Copyright 2024 gRPC authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""gRPC Python helloworld.Greeter client with observability enabled."""
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from collections import defaultdict
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import logging
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import time
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import grpc
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import grpc_observability
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import helloworld_pb2
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import helloworld_pb2_grpc
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import open_telemetry_exporter
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from opentelemetry.sdk.metrics import MeterProvider
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from opentelemetry.sdk.metrics.export import PeriodicExportingMetricReader
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OTEL_EXPORT_INTERVAL_S = 0.5
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def run():
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all_metrics = defaultdict(list)
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otel_exporter = open_telemetry_exporter.OTelMetricExporter(all_metrics)
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reader = PeriodicExportingMetricReader(
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exporter=otel_exporter,
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export_interval_millis=OTEL_EXPORT_INTERVAL_S * 1000,
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)
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provider = MeterProvider(metric_readers=[reader])
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otel_plugin = grpc_observability.OpenTelemetryPlugin(
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meter_provider=provider
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)
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otel_plugin.register_global()
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with grpc.insecure_channel(target="localhost:50051") as channel:
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stub = helloworld_pb2_grpc.GreeterStub(channel)
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try:
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response = stub.SayHello(helloworld_pb2.HelloRequest(name="You"))
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print(f"Greeter client received: {response.message}")
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except grpc.RpcError as rpc_error:
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print("Call failed with code: ", rpc_error.code())
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otel_plugin.deregister_global()
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# Sleep to make sure all metrics are exported.
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time.sleep(5)
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print("Metrics exported on client side:")
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for metric in all_metrics:
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print(metric)
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if __name__ == "__main__":
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logging.basicConfig()
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run()
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