Move TracerProvider::force_flush to SDK

Co-authored-by: Rohith VenkataRamanaNanthan <rohith.v@thoughtworks.com>

opentelemetry-api/src/global/mod.rs

@@ -157,7 +157,6 @@ pub use propagation::{get_text_map_propagator, set_text_map_propagator};
 #[cfg(feature = "trace")]
 #[cfg_attr(docsrs, doc(cfg(feature = "trace")))]
 pub use trace::{
-    force_flush_tracer_provider, set_tracer_provider, shutdown_tracer_provider, tracer,
-    tracer_provider, BoxedSpan, BoxedTracer, GlobalTracerProvider, ObjectSafeTracer,
-    ObjectSafeTracerProvider,
+    set_tracer_provider, shutdown_tracer_provider, tracer, tracer_provider, BoxedSpan, BoxedTracer,
+    GlobalTracerProvider, ObjectSafeTracer, ObjectSafeTracerProvider,
 };

opentelemetry-api/src/global/trace.rs

@@ -1,5 +1,4 @@
-use crate::global::handle_error;
-use crate::trace::{noop::NoopTracerProvider, SpanContext, Status, TraceResult};
+use crate::trace::{noop::NoopTracerProvider, SpanContext, Status};
 use crate::{trace, trace::TracerProvider, Context, KeyValue};
 use std::borrow::Cow;
 use std::fmt;
@@ -287,9 +286,6 @@ pub trait ObjectSafeTracerProvider {
         version: Option<&'static str>,
         schema_url: Option<&'static str>,
     ) -> Box<dyn ObjectSafeTracer + Send + Sync>;
-
-    /// Force flush all remaining spans in span processors and return results.
-    fn force_flush(&self) -> Vec<TraceResult<()>>;
 }
 
 impl<S, T, P> ObjectSafeTracerProvider for P
@@ -307,10 +303,6 @@ where
     ) -> Box<dyn ObjectSafeTracer + Send + Sync> {
         Box::new(self.versioned_tracer(name, version, schema_url))
     }
-
-    fn force_flush(&self) -> Vec<TraceResult<()>> {
-        self.force_flush()
-    }
 }
 
 /// Represents the globally configured [`TracerProvider`] instance for this
@@ -358,11 +350,6 @@ impl trace::TracerProvider for GlobalTracerProvider {
                 .versioned_tracer_boxed(name.into(), version, schema_url),
         )
     }
-
-    /// Force flush all remaining spans in span processors and return results.
-    fn force_flush(&self) -> Vec<TraceResult<()>> {
-        self.provider.force_flush()
-    }
 }
 
 lazy_static::lazy_static! {
@@ -426,21 +413,3 @@ pub fn shutdown_tracer_provider() {
         GlobalTracerProvider::new(NoopTracerProvider::new()),
     );
 }
-
-/// Force flush all remaining spans in span processors.
-///
-/// Use the [`global::handle_error`] to handle errors happened during force flush.
-///
-/// [`global::handle_error`]: crate::global::handle_error
-pub fn force_flush_tracer_provider() {
-    let tracer_provider = GLOBAL_TRACER_PROVIDER
-        .write()
-        .expect("GLOBAL_TRACER_PROVIDER RwLock poisoned");
-
-    let results = trace::TracerProvider::force_flush(&*tracer_provider);
-    for result in results {
-        if let Err(err) = result {
-            handle_error(err)
-        }
-    }
-}

opentelemetry-api/src/trace/noop.rs

@@ -3,7 +3,6 @@
 //! This implementation is returned as the global tracer if no `Tracer`
 //! has been set. It is also useful for testing purposes as it is intended
 //! to have minimal resource utilization and runtime impact.
-use crate::trace::TraceResult;
 use crate::{
     propagation::{text_map_propagator::FieldIter, Extractor, Injector, TextMapPropagator},
     trace,
@@ -38,11 +37,6 @@ impl trace::TracerProvider for NoopTracerProvider {
     ) -> Self::Tracer {
         NoopTracer::new()
     }
-
-    /// Return an empty `Vec` as there isn't any span processors in `NoopTracerProvider`
-    fn force_flush(&self) -> Vec<TraceResult<()>> {
-        Vec::new()
-    }
 }
 
 /// A no-op instance of a `Span`.

opentelemetry-api/src/trace/tracer_provider.rs

@@ -1,4 +1,4 @@
-use crate::trace::{TraceResult, Tracer};
+use crate::trace::Tracer;
 use std::borrow::Cow;
 
 /// Types that can create instances of [`Tracer`].
@@ -67,7 +67,4 @@ pub trait TracerProvider {
         version: Option<&'static str>,
         schema_url: Option<&'static str>,
     ) -> Self::Tracer;
-
-    /// Force flush all remaining spans in span processors and return results.
-    fn force_flush(&self) -> Vec<TraceResult<()>>;
 }

opentelemetry-sdk/src/trace/provider.rs

@@ -69,6 +69,14 @@ impl TracerProvider {
     pub fn config(&self) -> &crate::trace::Config {
         &self.inner.config
     }
+
+    /// Force flush all remaining spans in span processors and return results.
+    pub fn force_flush(&self) -> Vec<TraceResult<()>> {
+        self.span_processors()
+            .iter()
+            .map(|processor| processor.force_flush())
+            .collect()
+    }
 }
 
 impl opentelemetry_api::trace::TracerProvider for TracerProvider {
@@ -97,14 +105,6 @@ impl opentelemetry_api::trace::TracerProvider for TracerProvider {
 
         Tracer::new(instrumentation_lib, Arc::downgrade(&self.inner))
     }
-
-    /// Force flush all remaining spans in span processors and return results.
-    fn force_flush(&self) -> Vec<TraceResult<()>> {
-        self.span_processors()
-            .iter()
-            .map(|processor| processor.force_flush())
-            .collect()
-    }
 }
 
 /// Builder for provider attributes.
@@ -200,7 +200,7 @@ mod tests {
     use crate::trace::provider::TracerProviderInner;
     use crate::trace::{Config, Span, SpanProcessor};
     use crate::Resource;
-    use opentelemetry_api::trace::{TraceError, TraceResult, TracerProvider};
+    use opentelemetry_api::trace::{TraceError, TraceResult};
     use opentelemetry_api::{Context, Key, KeyValue};
     use std::env;
     use std::sync::Arc;