Support otel 0.24 (#127)

* Support otel 0.24

* fix the otel example

* Fix examples and last bits

* Update examples/custom-root-span/src/main.rs

* Update examples/opentelemetry/src/main.rs

---------

Co-authored-by: Luca Palmieri <20745048+LukeMathWalker@users.noreply.github.com>

examples/opentelemetry/Cargo.toml

@@ -2,16 +2,19 @@
 name = "otel"
 version = "0.1.0"
 authors = ["Luca Palmieri <rust@lpalmieri.com>"]
-edition = "2018"
+edition = "2021"
 
 license = "MIT/Apache-2.0"
 
 [dependencies]
 actix-web = "4"
-tracing = "0.1.19"
-opentelemetry = "0.23"
-opentelemetry-jaeger = { version = "0.22", features = ["rt-tokio-current-thread"] }
-tracing-opentelemetry = { version = "0.24" }
+once_cell = "1.19"
+opentelemetry = "0.24"
+opentelemetry_sdk = { version = "0.24", features = ["rt-tokio-current-thread"] }
+opentelemetry-otlp = "0.17"
+opentelemetry-semantic-conventions = "0.16"
+tracing-opentelemetry = "0.25"
 tracing-subscriber = { version = "0.3", features = ["registry", "env-filter"] }
 tracing-bunyan-formatter = "0.3"
-tracing-actix-web = { path = "../..", features = ["opentelemetry_0_23"] }
+tracing-actix-web = { path = "../..", features = ["opentelemetry_0_24"] }
+tracing = "0.1.40"

examples/opentelemetry/src/main.rs

@@ -1,35 +1,50 @@
 use actix_web::{web, App, HttpServer};
-use opentelemetry::{
-    global, runtime::TokioCurrentThread, sdk::propagation::TraceContextPropagator,
+use once_cell::sync::Lazy;
+use opentelemetry::trace::TracerProvider;
+use opentelemetry::{global, KeyValue};
+use opentelemetry_otlp::WithExportConfig;
+use opentelemetry_sdk::{
+    propagation::TraceContextPropagator, runtime::TokioCurrentThread, trace::Config, Resource,
 };
+use opentelemetry_semantic_conventions::resource;
 use std::io;
 use tracing_actix_web::TracingLogger;
 use tracing_bunyan_formatter::{BunyanFormattingLayer, JsonStorageLayer};
-use tracing_subscriber::layer::SubscriberExt;
-use tracing_subscriber::{EnvFilter, Registry};
+use tracing_subscriber::{layer::SubscriberExt, EnvFilter, Registry};
+
+const APP_NAME: &str = "tracing-actix-web-demo";
+
+static RESOURCE: Lazy<Resource> =
+    Lazy::new(|| Resource::new(vec![KeyValue::new(resource::SERVICE_NAME, APP_NAME)]));
 
 async fn hello() -> &'static str {
     "Hello world!"
 }
 
 fn init_telemetry() {
-    let app_name = "tracing-actix-web-demo";
-
-    // Start a new Jaeger trace pipeline.
+    // Start a new otlp trace pipeline.
     // Spans are exported in batch - recommended setup for a production application.
     global::set_text_map_propagator(TraceContextPropagator::new());
-    let tracer = opentelemetry_jaeger::new_agent_pipeline()
-        .with_service_name(app_name)
+    let tracer = opentelemetry_otlp::new_pipeline()
+        .tracing()
+        .with_exporter(
+            opentelemetry_otlp::new_exporter()
+                .tonic()
+                .with_endpoint("http://localhost:4317"),
+        )
+        .with_trace_config(Config::default().with_resource(RESOURCE.clone()))
         .install_batch(TokioCurrentThread)
-        .expect("Failed to install OpenTelemetry tracer.");
+        .expect("Failed to install OpenTelemetry tracer.")
+        .tracer_builder(APP_NAME)
+        .build();
 
     // Filter based on level - trace, debug, info, warn, error
     // Tunable via `RUST_LOG` env variable
     let env_filter = EnvFilter::try_from_default_env().unwrap_or(EnvFilter::new("info"));
-    // Create a `tracing` layer using the Jaeger tracer
+    // Create a `tracing` layer using the otlp tracer
     let telemetry = tracing_opentelemetry::layer().with_tracer(tracer);
     // Create a `tracing` layer to emit spans as structured logs to stdout
-    let formatting_layer = BunyanFormattingLayer::new(app_name.into(), std::io::stdout);
+    let formatting_layer = BunyanFormattingLayer::new(APP_NAME.into(), std::io::stdout);
     // Combined them all together in a `tracing` subscriber
     let subscriber = Registry::default()
         .with(env_filter)