Simplify SDK registration (#837)

packages/opentelemetry-api/src/index.ts

@@ -18,6 +18,7 @@ export * from './common/Logger';
 export * from './common/Time';
 export * from './context/propagation/getter';
 export * from './context/propagation/HttpTextFormat';
+export * from './context/propagation/NoopHttpTextFormat';
 export * from './context/propagation/setter';
 export * from './correlation_context/CorrelationContext';
 export * from './correlation_context/EntryValue';

packages/opentelemetry-node/package.json

@@ -43,6 +43,7 @@
   "devDependencies": {
     "@types/mocha": "^5.2.5",
     "@types/node": "^12.6.8",
+    "@opentelemetry/scope-base": "^0.4.0",
     "@types/semver": "^6.0.1",
     "@types/shimmer": "^1.0.1",
     "codecov": "^3.6.1",

packages/opentelemetry-node/src/NodeTracerProvider.ts

@@ -14,12 +14,20 @@
  * limitations under the License.
  */
 
-import { BasicTracerProvider } from '@opentelemetry/tracing';
+import { AsyncHooksScopeManager } from '@opentelemetry/scope-async-hooks';
+import {
+  BasicTracerProvider,
+  SDKRegistrationConfig,
+} from '@opentelemetry/tracing';
 import { DEFAULT_INSTRUMENTATION_PLUGINS, NodeTracerConfig } from './config';
 import { PluginLoader } from './instrumentation/PluginLoader';
 
 /**
- * This class represents a node tracer with `async_hooks` module.
+ * Register this TracerProvider for use with the OpenTelemetry API.
+ * Undefined values may be replaced with defaults, and
+ * null values will be skipped.
+ *
+ * @param config Configuration object for SDK registration
  */
 export class NodeTracerProvider extends BasicTracerProvider {
   private readonly _pluginLoader: PluginLoader;
@@ -37,4 +45,13 @@ export class NodeTracerProvider extends BasicTracerProvider {
   stop() {
     this._pluginLoader.unload();
   }
+
+  register(config: SDKRegistrationConfig = {}) {
+    if (config.contextManager === undefined) {
+      config.contextManager = new AsyncHooksScopeManager();
+      config.contextManager.enable();
+    }
+
+    super.register(config);
+  }
 }

packages/opentelemetry-node/test/registration.test.ts

@@ -0,0 +1,86 @@
+/*!
+ * Copyright 2020, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {
+  context,
+  NoopHttpTextFormat,
+  NoopTracerProvider,
+  propagation,
+  trace,
+} from '@opentelemetry/api';
+import { HttpTraceContext } from '@opentelemetry/core';
+import { AsyncHooksScopeManager } from '@opentelemetry/scope-async-hooks';
+import { NoopScopeManager } from '@opentelemetry/scope-base';
+import * as assert from 'assert';
+import { NodeTracerProvider } from '../src';
+
+describe('API registration', () => {
+  beforeEach(() => {
+    context.initGlobalContextManager(new NoopScopeManager());
+    propagation.initGlobalPropagator(new NoopHttpTextFormat());
+    trace.initGlobalTracerProvider(new NoopTracerProvider());
+  });
+
+  it('should register default implementations', () => {
+    const tracerProvider = new NodeTracerProvider();
+    tracerProvider.register();
+
+    assert.ok(context['_scopeManager'] instanceof AsyncHooksScopeManager);
+    assert.ok(propagation['_propagator'] instanceof HttpTraceContext);
+    assert.ok(trace['_tracerProvider'] === tracerProvider);
+  });
+
+  it('should register configured implementations', () => {
+    const tracerProvider = new NodeTracerProvider();
+
+    const contextManager = new NoopScopeManager();
+    const propagator = new NoopHttpTextFormat();
+
+    tracerProvider.register({
+      contextManager,
+      propagator,
+    });
+
+    assert.ok(context['_scopeManager'] === contextManager);
+    assert.ok(propagation['_propagator'] === propagator);
+
+    assert.ok(trace['_tracerProvider'] === tracerProvider);
+  });
+
+  it('should skip null context manager', () => {
+    const tracerProvider = new NodeTracerProvider();
+    tracerProvider.register({
+      contextManager: null,
+    });
+
+    assert.ok(context['_scopeManager'] instanceof NoopScopeManager);
+
+    assert.ok(propagation['_propagator'] instanceof HttpTraceContext);
+    assert.ok(trace['_tracerProvider'] === tracerProvider);
+  });
+
+  it('should skip null propagator', () => {
+    const tracerProvider = new NodeTracerProvider();
+    tracerProvider.register({
+      propagator: null,
+    });
+
+    assert.ok(propagation['_propagator'] instanceof NoopHttpTextFormat);
+
+    assert.ok(context['_scopeManager'] instanceof AsyncHooksScopeManager);
+    assert.ok(trace['_tracerProvider'] === tracerProvider);
+  });
+});

packages/opentelemetry-tracing/src/BasicTracerProvider.ts

@@ -14,23 +14,23 @@
  * limitations under the License.
  */
 
-import { ConsoleLogger } from '@opentelemetry/core';
-import * as types from '@opentelemetry/api';
+import * as api from '@opentelemetry/api';
+import { ConsoleLogger, HttpTraceContext } from '@opentelemetry/core';
 import { SpanProcessor, Tracer } from '.';
 import { DEFAULT_CONFIG } from './config';
 import { MultiSpanProcessor } from './MultiSpanProcessor';
 import { NoopSpanProcessor } from './NoopSpanProcessor';
-import { TracerConfig } from './types';
+import { SDKRegistrationConfig, TracerConfig } from './types';
 
 /**
  * This class represents a basic tracer provider which platform libraries can extend
  */
-export class BasicTracerProvider implements types.TracerProvider {
+export class BasicTracerProvider implements api.TracerProvider {
   private readonly _registeredSpanProcessors: SpanProcessor[] = [];
   private readonly _tracers: Map<string, Tracer> = new Map();
 
   activeSpanProcessor = new NoopSpanProcessor();
-  readonly logger: types.Logger;
+  readonly logger: api.Logger;
 
   constructor(private _config: TracerConfig = DEFAULT_CONFIG) {
     this.logger = _config.logger || new ConsoleLogger(_config.logLevel);
@@ -59,4 +59,26 @@ export class BasicTracerProvider implements types.TracerProvider {
   getActiveSpanProcessor(): SpanProcessor {
     return this.activeSpanProcessor;
   }
+
+  /**
+   * Register this TracerProvider for use with the OpenTelemetry API.
+   * Undefined values may be replaced with defaults, and
+   * null values will be skipped.
+   *
+   * @param config Configuration object for SDK registration
+   */
+  register(config: SDKRegistrationConfig = {}) {
+    api.trace.initGlobalTracerProvider(this);
+    if (config.propagator === undefined) {
+      config.propagator = new HttpTraceContext();
+    }
+
+    if (config.contextManager) {
+      api.context.initGlobalContextManager(config.contextManager);
+    }
+
+    if (config.propagator) {
+      api.propagation.initGlobalPropagator(config.propagator);
+    }
+  }
 }

packages/opentelemetry-tracing/src/types.ts

@@ -14,8 +14,14 @@
  * limitations under the License.
  */
 
-import { Attributes, Logger, Sampler } from '@opentelemetry/api';
+import {
+  Attributes,
+  HttpTextFormat,
+  Logger,
+  Sampler,
+} from '@opentelemetry/api';
 import { LogLevel } from '@opentelemetry/core';
+import { ScopeManager } from '@opentelemetry/scope-base';
 
 /**
  * TracerConfig provides an interface for configuring a Basic Tracer.
@@ -44,6 +50,19 @@ export interface TracerConfig {
   traceParams?: TraceParams;
 }
 
+/**
+ * Configuration options for registering the API with the SDK.
+ * Undefined values may be substituted for defaults, and null
+ * values will not be registered.
+ */
+export interface SDKRegistrationConfig {
+  /** Propagator to register as the global propagator */
+  propagator?: HttpTextFormat | null;
+
+  /** Context manager to register as the global context manager */
+  contextManager?: ScopeManager | null;
+}
+
 /** Global configuration of trace service */
 export interface TraceParams {
   /** numberOfAttributesPerSpan is number of attributes per span */

packages/opentelemetry-web/src/WebTracerProvider.ts

@@ -15,7 +15,12 @@
  */
 
 import { BasePlugin } from '@opentelemetry/core';
-import { BasicTracerProvider, TracerConfig } from '@opentelemetry/tracing';
+import {
+  BasicTracerProvider,
+  SDKRegistrationConfig,
+  TracerConfig,
+} from '@opentelemetry/tracing';
+import { StackScopeManager } from './StackScopeManager';
 
 /**
  * WebTracerConfig provides an interface for configuring a Web Tracer.
@@ -45,4 +50,20 @@ export class WebTracerProvider extends BasicTracerProvider {
       plugin.enable([], this, this.logger);
     }
   }
+
+  /**
+   * Register this TracerProvider for use with the OpenTelemetry API.
+   * Undefined values may be replaced with defaults, and
+   * null values will be skipped.
+   *
+   * @param config Configuration object for SDK registration
+   */
+  register(config: SDKRegistrationConfig = {}) {
+    if (config.contextManager === undefined) {
+      config.contextManager = new StackScopeManager();
+      config.contextManager.enable();
+    }
+
+    super.register(config);
+  }
 }

packages/opentelemetry-web/test/registration.test.ts

@@ -0,0 +1,85 @@
+/*!
+ * Copyright 2020, OpenTelemetry Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {
+  context,
+  NoopHttpTextFormat,
+  NoopTracerProvider,
+  propagation,
+  trace,
+} from '@opentelemetry/api';
+import { HttpTraceContext } from '@opentelemetry/core';
+import { NoopScopeManager } from '@opentelemetry/scope-base';
+import * as assert from 'assert';
+import { WebTracerProvider, StackScopeManager } from '../src';
+
+describe('API registration', () => {
+  beforeEach(() => {
+    context.initGlobalContextManager(new NoopScopeManager());
+    propagation.initGlobalPropagator(new NoopHttpTextFormat());
+    trace.initGlobalTracerProvider(new NoopTracerProvider());
+  });
+
+  it('should register default implementations', () => {
+    const tracerProvider = new WebTracerProvider();
+    tracerProvider.register();
+
+    assert.ok(context['_scopeManager'] instanceof StackScopeManager);
+    assert.ok(propagation['_propagator'] instanceof HttpTraceContext);
+    assert.ok(trace['_tracerProvider'] === tracerProvider);
+  });
+
+  it('should register configured implementations', () => {
+    const tracerProvider = new WebTracerProvider();
+
+    const contextManager = new NoopScopeManager();
+    const propagator = new NoopHttpTextFormat();
+
+    tracerProvider.register({
+      contextManager,
+      propagator,
+    });
+
+    assert.ok(context['_scopeManager'] === contextManager);
+    assert.ok(propagation['_propagator'] === propagator);
+
+    assert.ok(trace['_tracerProvider'] === tracerProvider);
+  });
+
+  it('should skip null context manager', () => {
+    const tracerProvider = new WebTracerProvider();
+    tracerProvider.register({
+      contextManager: null,
+    });
+
+    assert.ok(context['_scopeManager'] instanceof NoopScopeManager);
+
+    assert.ok(propagation['_propagator'] instanceof HttpTraceContext);
+    assert.ok(trace['_tracerProvider'] === tracerProvider);
+  });
+
+  it('should skip null propagator', () => {
+    const tracerProvider = new WebTracerProvider();
+    tracerProvider.register({
+      propagator: null,
+    });
+
+    assert.ok(propagation['_propagator'] instanceof NoopHttpTextFormat);
+
+    assert.ok(context['_scopeManager'] instanceof StackScopeManager);
+    assert.ok(trace['_tracerProvider'] === tracerProvider);
+  });
+});