simplify batch example

Author: gruebel

opentelemetry-zipkin/CHANGELOG.md

@@ -4,6 +4,23 @@
 
 - Bump msrv to 1.75.0.
 - **Breaking** The `opentelemetry_zipkin::new_pipeline()` interface is now replaced with `opentelemetry_zipkin::ZipkinExporter::builder()`.
+  
+  Previous Signature:
+  ```rust
+  let tracer = opentelemetry_zipkin::new_pipeline()
+      .with_service_name("trace-demo")
+      .install_simple()?;
+  ```
+  Updated Signature:
+  ```rust
+  let exporter = ZipkinExporter::builder()
+      .with_service_name("trace-demo")
+      .build()?;
+  let provider = TracerProvider::builder()
+      .with_simple_exporter(exporter)
+      .build();
+  let tracer = global::tracer("zipkin-tracer");
+  ```
 
 ## 0.27.0
 

opentelemetry-zipkin/Cargo.toml

@@ -45,5 +45,5 @@ bytes = { workspace = true }
 futures-util = { workspace = true, features = ["io"] }
 http-body-util = { workspace = true }
 hyper-util = { workspace = true, features = ["client-legacy", "http1", "tokio"] }
-opentelemetry_sdk = { default-features = false, features = ["experimental_trace_batch_span_processor_with_async_runtime", "trace", "testing"], path = "../opentelemetry-sdk" }
+opentelemetry_sdk = { default-features = false, features = ["trace", "testing"], path = "../opentelemetry-sdk" }
 temp-env = { workspace = true }

opentelemetry-zipkin/src/lib.rs

@@ -52,22 +52,13 @@
 //! ## Performance
 //!
 //! For optimal performance, a batch exporter is recommended as the simple exporter
-//! will export each span synchronously on drop. You can enable the [`rt-tokio`],
-//! [`rt-tokio-current-thread`] or [`rt-async-std`] features and specify a runtime
-//! on the trace provider builder to have a batch exporter configured for you
-//! automatically.
-//!
-//! ```toml
-//! [dependencies]
-//! opentelemetry = { version = "*", features = ["rt-tokio"] }
-//! opentelemetry-zipkin = { version = "*", features = ["reqwest-client"], default-features = false }
-//! ```
+//! will export each span synchronously on drop. You can achieve this by creating a
+//! `BatchSpanProcessor` and passing it to the trace provider.
 //!
 //! ```no_run
 //! use opentelemetry_sdk::{
-//!     runtime::Tokio,
 //!     trace::{
-//!         span_processor_with_async_runtime::BatchSpanProcessor,
+//!         BatchSpanProcessor,
 //!         BatchConfigBuilder,
 //!         TracerProvider,
 //!     }
@@ -79,7 +70,7 @@
 //!         .with_service_name("runtime-demo")
 //!         .build()?;
 //!
-//!     let batch = BatchSpanProcessor::builder(exporter, Tokio)
+//!     let batch = BatchSpanProcessor::builder(exporter)
 //!         .with_batch_config(BatchConfigBuilder::default().with_max_queue_size(4096).build())
 //!         .build();
 //!
@@ -91,9 +82,6 @@
 //! }
 //! ```
 //!
-//! [`rt-tokio`]: https://tokio.rs
-//! [`async-std`]: https://async.rs
-//!
 //! ## Choosing an HTTP client
 //!
 //! The HTTP client that this exporter will use can be overridden using features