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client.rs
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client.rs
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use hello_world::greeter_client::GreeterClient;
use hello_world::HelloRequest;
use opentelemetry::global;
use opentelemetry::sdk::propagation::TraceContextPropagator;
use opentelemetry::trace::TraceError;
use opentelemetry::{
trace::{TraceContextExt, Tracer},
Context, KeyValue,
};
pub mod hello_world {
tonic::include_proto!("helloworld");
}
fn tracing_init() -> Result<(impl Tracer, opentelemetry_jaeger::Uninstall), TraceError> {
global::set_text_map_propagator(TraceContextPropagator::new());
opentelemetry_jaeger::new_pipeline()
.with_service_name("grpc-client")
.install()
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync + 'static>> {
let (tracer, _uninstall) = tracing_init()?;
let mut client = GreeterClient::connect("http://[::1]:50051").await?;
let span = tracer.start("client-request");
let cx = Context::current_with_span(span);
let mut request = tonic::Request::new(HelloRequest {
name: "Tonic".into(),
});
global::get_text_map_propagator(|propagator| {
propagator.inject_context(&cx, request.metadata_mut())
});
let response = client.say_hello(request).await?;
cx.span().add_event(
"response-received".to_string(),
vec![KeyValue::new("response", format!("{:?}", response))],
);
Ok(())
}