refactor: update metrics Result to be MetricResult (#2241)

Co-authored-by: Cijo Thomas <[email protected]>

Author: pitoniak32

CONTRIBUTING.md

@@ -140,7 +140,7 @@ For a deeper discussion, see:
 
 Currently, the Opentelemetry Rust SDK has two ways to handle errors. In the situation where errors are not allowed to return. One should call global error handler to process the errors. Otherwise, one should return the errors.
 
-The Opentelemetry Rust SDK comes with an error type `opentelemetry::Error`. For different function, one error has been defined. All error returned by trace module MUST be wrapped in `opentelemetry::trace::TraceError`. All errors returned by metrics module MUST be wrapped in `opentelemetry::metrics::MetricsError`. All errors returned by logs module MUST be wrapped in `opentelemetry::logs::LogsError`.
+The Opentelemetry Rust SDK comes with an error type `opentelemetry::Error`. For different function, one error has been defined. All error returned by trace module MUST be wrapped in `opentelemetry::trace::TraceError`. All errors returned by metrics module MUST be wrapped in `opentelemetry::metrics::MetricError`. All errors returned by logs module MUST be wrapped in `opentelemetry::logs::LogsError`.
 
 For users that want to implement their own exporters. It's RECOMMENDED to wrap all errors from the exporter into a crate-level error type, and implement `ExporterError` trait.
 

opentelemetry-otlp/examples/basic-otlp-http/src/main.rs

@@ -1,7 +1,7 @@
 use once_cell::sync::Lazy;
 use opentelemetry::{
     global,
-    metrics::MetricsError,
+    metrics::MetricError,
     trace::{TraceContextExt, TraceError, Tracer},
     InstrumentationScope, KeyValue,
 };
@@ -65,7 +65,7 @@ fn init_tracer_provider() -> Result<sdktrace::TracerProvider, TraceError> {
         .build())
 }
 
-fn init_metrics() -> Result<opentelemetry_sdk::metrics::SdkMeterProvider, MetricsError> {
+fn init_metrics() -> Result<opentelemetry_sdk::metrics::SdkMeterProvider, MetricError> {
     let exporter = MetricsExporter::builder()
         .with_http()
         .with_protocol(Protocol::HttpBinary) //can be changed to `Protocol::HttpJson` to export in JSON format

opentelemetry-otlp/examples/basic-otlp/src/main.rs

@@ -1,6 +1,6 @@
 use once_cell::sync::Lazy;
 use opentelemetry::logs::LogError;
-use opentelemetry::metrics::MetricsError;
+use opentelemetry::metrics::MetricError;
 use opentelemetry::trace::{TraceContextExt, TraceError, Tracer};
 use opentelemetry::KeyValue;
 use opentelemetry::{global, InstrumentationScope};
@@ -33,7 +33,7 @@ fn init_tracer_provider() -> Result<sdktrace::TracerProvider, TraceError> {
         .build())
 }
 
-fn init_metrics() -> Result<opentelemetry_sdk::metrics::SdkMeterProvider, MetricsError> {
+fn init_metrics() -> Result<opentelemetry_sdk::metrics::SdkMeterProvider, MetricError> {
     let exporter = MetricsExporter::builder().with_tonic().build()?;
 
     let reader = PeriodicReader::builder(exporter, runtime::Tokio).build();

opentelemetry-otlp/src/exporter/http/metrics.rs

@@ -2,7 +2,7 @@ use std::sync::Arc;
 
 use async_trait::async_trait;
 use http::{header::CONTENT_TYPE, Method};
-use opentelemetry::metrics::{MetricsError, Result};
+use opentelemetry::metrics::{MetricError, MetricResult};
 use opentelemetry_sdk::metrics::data::ResourceMetrics;
 
 use crate::{metric::MetricsClient, Error};
@@ -11,14 +11,14 @@ use super::OtlpHttpClient;
 
 #[async_trait]
 impl MetricsClient for OtlpHttpClient {
-    async fn export(&self, metrics: &mut ResourceMetrics) -> Result<()> {
+    async fn export(&self, metrics: &mut ResourceMetrics) -> MetricResult<()> {
         let client = self
             .client
             .lock()
             .map_err(Into::into)
             .and_then(|g| match &*g {
                 Some(client) => Ok(Arc::clone(client)),
-                _ => Err(MetricsError::Other("exporter is already shut down".into())),
+                _ => Err(MetricError::Other("exporter is already shut down".into())),
             })?;
 
         let (body, content_type) = self.build_metrics_export_body(metrics)?;
@@ -36,12 +36,12 @@ impl MetricsClient for OtlpHttpClient {
         client
             .send(request)
             .await
-            .map_err(|e| MetricsError::ExportErr(Box::new(Error::RequestFailed(e))))?;
+            .map_err(|e| MetricError::ExportErr(Box::new(Error::RequestFailed(e))))?;
 
         Ok(())
     }
 
-    fn shutdown(&self) -> Result<()> {
+    fn shutdown(&self) -> MetricResult<()> {
         let _ = self.client.lock()?.take();
 
         Ok(())

opentelemetry-otlp/src/exporter/http/mod.rs

@@ -221,7 +221,7 @@ impl HttpExporterBuilder {
     pub fn build_metrics_exporter(
         mut self,
         temporality: opentelemetry_sdk::metrics::data::Temporality,
-    ) -> opentelemetry::metrics::Result<crate::MetricsExporter> {
+    ) -> opentelemetry::metrics::MetricResult<crate::MetricsExporter> {
         use crate::{
             OTEL_EXPORTER_OTLP_METRICS_ENDPOINT, OTEL_EXPORTER_OTLP_METRICS_HEADERS,
             OTEL_EXPORTER_OTLP_METRICS_TIMEOUT,
@@ -311,7 +311,7 @@ impl OtlpHttpClient {
     fn build_metrics_export_body(
         &self,
         metrics: &mut opentelemetry_sdk::metrics::data::ResourceMetrics,
-    ) -> opentelemetry::metrics::Result<(Vec<u8>, &'static str)> {
+    ) -> opentelemetry::metrics::MetricResult<(Vec<u8>, &'static str)> {
         use opentelemetry_proto::tonic::collector::metrics::v1::ExportMetricsServiceRequest;
 
         let req: ExportMetricsServiceRequest = (&*metrics).into();
@@ -320,7 +320,7 @@ impl OtlpHttpClient {
             #[cfg(feature = "http-json")]
             Protocol::HttpJson => match serde_json::to_string_pretty(&req) {
                 Ok(json) => Ok((json.into(), "application/json")),
-                Err(e) => Err(opentelemetry::metrics::MetricsError::Other(e.to_string())),
+                Err(e) => Err(opentelemetry::metrics::MetricError::Other(e.to_string())),
             },
             _ => Ok((req.encode_to_vec(), "application/x-protobuf")),
         }

opentelemetry-otlp/src/exporter/tonic/metrics.rs

@@ -2,7 +2,7 @@ use core::fmt;
 use std::sync::Mutex;
 
 use async_trait::async_trait;
-use opentelemetry::metrics::{MetricsError, Result};
+use opentelemetry::metrics::{MetricError, MetricResult};
 use opentelemetry_proto::tonic::collector::metrics::v1::{
     metrics_service_client::MetricsServiceClient, ExportMetricsServiceRequest,
 };
@@ -51,7 +51,7 @@ impl TonicMetricsClient {
 
 #[async_trait]
 impl MetricsClient for TonicMetricsClient {
-    async fn export(&self, metrics: &mut ResourceMetrics) -> Result<()> {
+    async fn export(&self, metrics: &mut ResourceMetrics) -> MetricResult<()> {
         let (mut client, metadata, extensions) =
             self.inner
                 .lock()
@@ -62,14 +62,14 @@ impl MetricsClient for TonicMetricsClient {
                             .interceptor
                             .call(Request::new(()))
                             .map_err(|e| {
-                                MetricsError::Other(format!(
+                                MetricError::Other(format!(
                                     "unexpected status while exporting {e:?}"
                                 ))
                             })?
                             .into_parts();
                         Ok((inner.client.clone(), m, e))
                     }
-                    None => Err(MetricsError::Other("exporter is already shut down".into())),
+                    None => Err(MetricError::Other("exporter is already shut down".into())),
                 })?;
 
         client
@@ -84,7 +84,7 @@ impl MetricsClient for TonicMetricsClient {
         Ok(())
     }
 
-    fn shutdown(&self) -> Result<()> {
+    fn shutdown(&self) -> MetricResult<()> {
         let _ = self.inner.lock()?.take();
 
         Ok(())

opentelemetry-otlp/src/exporter/tonic/mod.rs

@@ -274,7 +274,7 @@ impl TonicExporterBuilder {
     pub(crate) fn build_metrics_exporter(
         self,
         temporality: opentelemetry_sdk::metrics::data::Temporality,
-    ) -> opentelemetry::metrics::Result<crate::MetricsExporter> {
+    ) -> opentelemetry::metrics::MetricResult<crate::MetricsExporter> {
         use crate::MetricsExporter;
         use metrics::TonicMetricsClient;
 

opentelemetry-otlp/src/metric.rs

@@ -16,7 +16,7 @@ use crate::NoExporterBuilderSet;
 
 use async_trait::async_trait;
 use core::fmt;
-use opentelemetry::metrics::Result;
+use opentelemetry::metrics::MetricResult;
 
 use opentelemetry_sdk::metrics::{
     data::{ResourceMetrics, Temporality},
@@ -77,15 +77,15 @@ impl<C> MetricsExporterBuilder<C> {
 
 #[cfg(feature = "grpc-tonic")]
 impl MetricsExporterBuilder<TonicExporterBuilderSet> {
-    pub fn build(self) -> Result<MetricsExporter> {
+    pub fn build(self) -> MetricResult<MetricsExporter> {
         let exporter = self.client.0.build_metrics_exporter(self.temporality)?;
         Ok(exporter)
     }
 }
 
 #[cfg(any(feature = "http-proto", feature = "http-json"))]
 impl MetricsExporterBuilder<HttpExporterBuilderSet> {
-    pub fn build(self) -> Result<MetricsExporter> {
+    pub fn build(self) -> MetricResult<MetricsExporter> {
         let exporter = self.client.0.build_metrics_exporter(self.temporality)?;
         Ok(exporter)
     }
@@ -122,8 +122,8 @@ impl HasHttpConfig for MetricsExporterBuilder<HttpExporterBuilderSet> {
 /// An interface for OTLP metrics clients
 #[async_trait]
 pub trait MetricsClient: fmt::Debug + Send + Sync + 'static {
-    async fn export(&self, metrics: &mut ResourceMetrics) -> Result<()>;
-    fn shutdown(&self) -> Result<()>;
+    async fn export(&self, metrics: &mut ResourceMetrics) -> MetricResult<()>;
+    fn shutdown(&self) -> MetricResult<()>;
 }
 
 /// Export metrics in OTEL format.
@@ -140,16 +140,16 @@ impl Debug for MetricsExporter {
 
 #[async_trait]
 impl PushMetricsExporter for MetricsExporter {
-    async fn export(&self, metrics: &mut ResourceMetrics) -> Result<()> {
+    async fn export(&self, metrics: &mut ResourceMetrics) -> MetricResult<()> {
         self.client.export(metrics).await
     }
 
-    async fn force_flush(&self) -> Result<()> {
+    async fn force_flush(&self) -> MetricResult<()> {
         // this component is stateless
         Ok(())
     }
 
-    fn shutdown(&self) -> Result<()> {
+    fn shutdown(&self) -> MetricResult<()> {
         self.client.shutdown()
     }
 

opentelemetry-proto/src/transform/metrics.rs

@@ -8,7 +8,7 @@ pub mod tonic {
     use std::any::Any;
     use std::fmt;
 
-    use opentelemetry::{global, metrics::MetricsError, Key, Value};
+    use opentelemetry::{global, metrics::MetricError, Key, Value};
     use opentelemetry_sdk::metrics::data::{
         self, Exemplar as SdkExemplar, ExponentialHistogram as SdkExponentialHistogram,
         Gauge as SdkGauge, Histogram as SdkHistogram, Metric as SdkMetric,
@@ -97,7 +97,7 @@ pub mod tonic {
                 Temporality::Cumulative => AggregationTemporality::Cumulative,
                 Temporality::Delta => AggregationTemporality::Delta,
                 other => {
-                    opentelemetry::global::handle_error(MetricsError::Other(format!(
+                    opentelemetry::global::handle_error(MetricError::Other(format!(
                         "Unknown temporality {:?}, using default instead.",
                         other
                     )));
@@ -184,7 +184,7 @@ pub mod tonic {
             } else if let Some(gauge) = data.downcast_ref::<SdkGauge<f64>>() {
                 Ok(TonicMetricData::Gauge(gauge.into()))
             } else {
-                global::handle_error(MetricsError::Other("unknown aggregator".into()));
+                global::handle_error(MetricError::Other("unknown aggregator".into()));
                 Err(())
             }
         }

opentelemetry-sdk/benches/metric.rs

@@ -3,7 +3,7 @@ use std::sync::{Arc, Weak};
 
 use criterion::{criterion_group, criterion_main, Bencher, Criterion};
 use opentelemetry::{
-    metrics::{Counter, Histogram, MeterProvider as _, Result},
+    metrics::{Counter, Histogram, MeterProvider as _, MetricResult},
     Key, KeyValue,
 };
 use opentelemetry_sdk::{
@@ -25,15 +25,15 @@ impl MetricReader for SharedReader {
         self.0.register_pipeline(pipeline)
     }
 
-    fn collect(&self, rm: &mut ResourceMetrics) -> Result<()> {
+    fn collect(&self, rm: &mut ResourceMetrics) -> MetricResult<()> {
         self.0.collect(rm)
     }
 
-    fn force_flush(&self) -> Result<()> {
+    fn force_flush(&self) -> MetricResult<()> {
         self.0.force_flush()
     }
 
-    fn shutdown(&self) -> Result<()> {
+    fn shutdown(&self) -> MetricResult<()> {
         self.0.shutdown()
     }