From 66da9a432c3a242809c5c17027741b9df90f3ffd Mon Sep 17 00:00:00 2001
From: Mayur Kale <mayurkale@google.com>
Date: Wed, 11 Sep 2019 10:32:43 -0700
Subject: [PATCH] feat: add basic tracer usage (#239)

---
 packages/opentelemetry-basic-tracer/README.md | 23 +++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/packages/opentelemetry-basic-tracer/README.md b/packages/opentelemetry-basic-tracer/README.md
index ff810f8bb1e..a4dff0011f5 100644
--- a/packages/opentelemetry-basic-tracer/README.md
+++ b/packages/opentelemetry-basic-tracer/README.md
@@ -18,9 +18,28 @@ npm install --save @opentelemetry/basic-tracer
 ## Usage
 
 ```
-const opentelemetry = require('@opentelemetry/basic-tracer');
+const opentelemetry = require('@opentelemetry/core');
+const { BasicTracer } = require('@opentelemetry/basic-tracer');
+const { NoopScopeManager } = require('@opentelemetry/scope-base');
+
+// To start a trace, you first need to initialize the Tracer.
+// NOTE: the default OpenTelemetry tracer does not record any tracing information.
+const tracer = new BasicTracer({
+  scopeManager: new NoopScopeManager()
+});
+
+// Initialize the OpenTelemetry APIs to use the BasicTracer bindings
+opentelemetry.initGlobalTracer(tracer);
+
+// To create a span in a trace, we used the global singleton tracer to start a new span.
+const span = opentelemetry.getTracer().startSpan('foo');
+
+// Create an Attributes
+span.setAttribute('key', 'value');
+
+// We must end the spans so they becomes available for exporting.
+span.end();
 
-// TODO: DEMONSTRATE API
 ```
 
 ## Useful links