Add stdout exporter example for Logs.

opentelemetry-stdout/Cargo.toml

@@ -10,7 +10,7 @@ categories = [
     "development-tools::profiling",
     "asynchronous",
 ]
-keywords = ["opentelemetry", "tracing", "metrics"]
+keywords = ["opentelemetry", "tracing", "metrics", "logs"]
 license = "Apache-2.0"
 edition = "2021"
 rust-version = "1.60"

opentelemetry-stdout/examples/logs_basics.rs

@@ -0,0 +1,58 @@
+//! run with `$ cargo run --example basic --all-features
+
+#[cfg(all(feature = "logs", feature = "trace"))]
+use opentelemetry_api::{
+    logs::LoggerProvider as _,
+    logs::LogRecordBuilder,
+    logs::Logger,
+    logs::Severity,
+    trace::{Span, Tracer, TracerProvider as _, mark_span_as_active},
+    Context, KeyValue,
+};
+#[cfg(all(feature = "logs", feature = "trace"))]
+use opentelemetry_sdk::{
+    logs::LoggerProvider,
+    runtime,
+    trace::TracerProvider,
+};
+
+#[cfg(all(feature = "logs", feature = "trace"))]
+fn init_trace() -> TracerProvider {
+    let exporter = opentelemetry_stdout::SpanExporter::default();
+    TracerProvider::builder()
+        .with_simple_exporter(exporter)
+        .build()
+}
+
+#[cfg(all(feature = "logs", feature = "trace"))]
+fn init_logger() -> LoggerProvider {
+    let exporter = opentelemetry_stdout::LogExporter::default();
+    LoggerProvider::builder()
+        .with_simple_exporter(exporter)
+        .build()
+}
+
+#[tokio::main]
+#[cfg(all(feature = "logs", feature = "trace"))]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    use opentelemetry_api::logs::LogRecordBuilder;
+
+    let logger_provider = init_logger();
+    let tracer_provider = init_trace();
+    let cx = Context::new();
+
+    let tracer = tracer_provider.tracer("stdout-test");
+    let logger = logger_provider.versioned_logger("stdout-test", None, None, None, true);
+    let mut span = tracer.start("test_span");
+    span.set_attribute(KeyValue::new("test_key", "test_value"));
+    let span_active = mark_span_as_active(span);
+    let log_record = LogRecordBuilder::new()
+                        .with_body("test log".into())
+                        .with_severity_number(Severity::Info)
+                        .build();
+    logger.emit(log_record);
+    drop(span_active);
+    Ok(())
+}
+#[cfg(not(all(feature = "logs", feature = "trace")))]
+fn main() {}