chore: remove tracer apis not part of spec (open-telemetry#1764)

Co-authored-by: Mayur Kale <mayurkale@google.com>
Co-authored-by: Daniel Dyla <dyladan@users.noreply.github.com>

api/README.md

@@ -160,7 +160,7 @@ const api = require("@opentelemetry/api");
 const tracer = api.trace.getTracer("my-library-name", "0.2.3");
 
 async function doSomething() {
-  const span = tracer.startSpan("doSomething", { parent: tracer.getCurrentSpan() });
+  const span = tracer.startSpan("doSomething");
   try {
     const result = await doSomethingElse();
     span.end();

api/src/api/global-utils.ts

@@ -65,4 +65,4 @@ export function makeGetter<T>(
  * version. If the global API is not compatible with the API package
  * attempting to get it, a NOOP API implementation will be returned.
  */
-export const API_BACKWARDS_COMPATIBILITY_VERSION = 2;
+export const API_BACKWARDS_COMPATIBILITY_VERSION = 3;

api/src/trace/NoopTracer.ts

@@ -24,10 +24,6 @@ import { getSpanContext } from '../context/context';
  * No-op implementations of {@link Tracer}.
  */
 export class NoopTracer implements Tracer {
-  getCurrentSpan(): Span {
-    return NOOP_SPAN;
-  }
-
   // startSpan starts a noop span.
   startSpan(name: string, options?: SpanOptions, context?: Context): Span {
     const root = Boolean(options?.root);
@@ -46,17 +42,6 @@ export class NoopTracer implements Tracer {
       return NOOP_SPAN;
     }
   }
-
-  withSpan<T extends (...args: unknown[]) => ReturnType<T>>(
-    span: Span,
-    fn: T
-  ): ReturnType<T> {
-    return fn();
-  }
-
-  bind<T>(target: T, _span?: Span): T {
-    return target;
-  }
 }
 
 function isSpanContext(spanContext: any): spanContext is SpanContext {

api/src/trace/ProxyTracer.ts

@@ -31,25 +31,10 @@ export class ProxyTracer implements Tracer {
     public readonly version?: string
   ) {}
 
-  getCurrentSpan(): Span | undefined {
-    return this._getTracer().getCurrentSpan();
-  }
-
   startSpan(name: string, options?: SpanOptions): Span {
     return this._getTracer().startSpan(name, options);
   }
 
-  withSpan<T extends (...args: unknown[]) => ReturnType<T>>(
-    span: Span,
-    fn: T
-  ): ReturnType<T> {
-    return this._getTracer().withSpan(span, fn);
-  }
-
-  bind<T>(target: T, span?: Span): T {
-    return this._getTracer().bind(target, span);
-  }
-
   /**
    * Try to get a tracer from the proxy tracer provider.
    * If the proxy tracer provider has no delegate, return a noop tracer.

api/src/trace/tracer.ts

@@ -27,24 +27,9 @@ import { SpanOptions } from './SpanOptions';
  */
 export interface Tracer {
   /**
-   * Returns the current Span from the current context if available.
+   * Starts a new {@link Span}. Start the span without setting it on context.
    *
-   * If there is no Span associated with the current context, `undefined` is
-   * returned.
-   *
-   * To install a {@link Span} to the current Context use
-   * {@link Tracer.withSpan}.
-   *
-   * @returns Span The currently active Span
-   */
-  getCurrentSpan(): Span | undefined;
-
-  /**
-   * Starts a new {@link Span}. Start the span without setting it as the current
-   * span in this tracer's context.
-   *
-   * This method do NOT modify the current Context. To install a {@link
-   * Span} to the current Context use {@link Tracer.withSpan}.
+   * This method do NOT modify the current Context.
    *
    * @param name The name of the span
    * @param [options] SpanOptions used for span creation
@@ -56,32 +41,4 @@ export interface Tracer {
    *     span.end();
    */
   startSpan(name: string, options?: SpanOptions, context?: Context): Span;
-
-  /**
-   * Executes the function given by fn within the context provided by Span.
-   *
-   * This is a convenience method for creating spans attached to the tracer's
-   * context. Applications that need more control over the span lifetime should
-   * use {@link Tracer.startSpan} instead.
-   *
-   * @param span The span that provides the context
-   * @param fn The function to be executed inside the provided context
-   * @example
-   *     tracer.withSpan(span, () => {
-   *         tracer.getCurrentSpan().addEvent("parent's event");
-   *         doSomeOtherWork();  // Here "span" is the current Span.
-   *     });
-   */
-  withSpan<T extends (...args: unknown[]) => ReturnType<T>>(
-    span: Span,
-    fn: T
-  ): ReturnType<T>;
-
-  /**
-   * Bind a span as the target's context or propagate the current one.
-   *
-   * @param target Any object to which a context need to be set
-   * @param [context] Optionally specify the context which you want to bind
-   */
-  bind<T>(target: T, context?: Span): T;
 }

api/test/api/api.test.ts

@@ -36,8 +36,6 @@ import api, {
 } from '../../src';
 
 describe('API', () => {
-  const functions = ['getCurrentSpan', 'startSpan', 'withSpan'];
-
   it('should expose a tracer provider via getTracerProvider', () => {
     const tracer = api.trace.getTracerProvider();
     assert.ok(tracer);
@@ -59,20 +57,6 @@ describe('API', () => {
       metrics.disable();
     });
 
-    it('should not crash', () => {
-      functions.forEach(fn => {
-        const tracer = api.trace.getTracerProvider();
-        try {
-          ((tracer as unknown) as { [fn: string]: Function })[fn](); // Try to run the function
-          assert.ok(true, fn);
-        } catch (err) {
-          if (err.message !== 'Method not implemented.') {
-            assert.ok(true, fn);
-          }
-        }
-      });
-    });
-
     it('should use the global tracer provider', () => {
       api.trace.setGlobalTracerProvider(new TestTracerProvider());
       const tracer = api.trace.getTracerProvider().getTracer('name');

api/test/noop-implementations/noop-tracer.test.ts

@@ -40,24 +40,6 @@ describe('NoopTracer', () => {
       }),
       NOOP_SPAN
     );
-
-    assert.deepStrictEqual(tracer.getCurrentSpan(), NOOP_SPAN);
-  });
-
-  it('should not crash when .withSpan()', done => {
-    const tracer = new NoopTracer();
-    tracer.withSpan(NOOP_SPAN, () => {
-      return done();
-    });
-  });
-
-  it('should not crash when .bind()', done => {
-    const tracer = new NoopTracer();
-    const fn = () => {
-      return done();
-    };
-    const patchedFn = tracer.bind(fn, NOOP_SPAN);
-    return patchedFn();
   });
 
   it('should propagate valid spanContext on the span (from context)', () => {

api/test/proxy-implementations/proxy-tracer.test.ts

@@ -56,8 +56,6 @@ describe('ProxyTracer', () => {
         }),
         NOOP_SPAN
       );
-
-      assert.deepStrictEqual(tracer.getCurrentSpan(), NOOP_SPAN);
     });
   });
 
@@ -96,18 +94,9 @@ describe('ProxyTracer', () => {
     beforeEach(() => {
       delegateSpan = new NoopSpan();
       delegateTracer = {
-        bind(target) {
-          return target;
-        },
-        getCurrentSpan() {
-          return delegateSpan;
-        },
         startSpan() {
           return delegateSpan;
         },
-        withSpan(span, fn) {
-          return fn();
-        },
       };
 
       tracer = provider.getTracer('test');