fix: change SpanContext.traceFlags to mandatory

packages/opentelemetry-api/src/index.ts

@@ -30,6 +30,7 @@ export * from './metrics/NoopMeterProvider';
 export * from './trace/attributes';
 export * from './trace/Event';
 export * from './trace/instrumentation/Plugin';
+export * from './trace/link_context';
 export * from './trace/link';
 export * from './trace/NoopSpan';
 export * from './trace/NoopTracer';

packages/opentelemetry-api/src/trace/NoopSpan.ts

@@ -59,11 +59,6 @@ export class NoopSpan implements Span {
     return this;
   }
 
-  // By default does nothing
-  addLink(spanContext: SpanContext, attributes?: Attributes): this {
-    return this;
-  }
-
   // By default does nothing
   setStatus(status: Status): this {
     return this;

packages/opentelemetry-api/src/trace/link.ts

@@ -15,7 +15,7 @@
  */
 
 import { Attributes } from './attributes';
-import { SpanContext } from './span_context';
+import { LinkContext } from './link_context';
 
 /**
  * A pointer from the current {@link Span} to another span in the same trace or
@@ -24,7 +24,7 @@ import { SpanContext } from './span_context';
  */
 export interface Link {
   /** The {@link SpanContext} of a linked span. */
-  spanContext: SpanContext;
+  linkContext: LinkContext;
   /** A set of {@link Attributes} on the link. */
   attributes?: Attributes;
 }

packages/opentelemetry-api/src/trace/link_context.ts

@@ -0,0 +1,34 @@
+/*!
+ * 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.
+ */
+
+/**
+ * A pointer to another span.
+ */
+export interface LinkContext {
+  /**
+   * The ID of the trace that this span belongs to. It is worldwide unique
+   * with practically sufficient probability by being made as 16 randomly
+   * generated bytes, encoded as a 32 lowercase hex characters corresponding to
+   * 128 bits.
+   */
+  traceId: string;
+  /**
+   * The ID of the Span. It is globally unique with practically sufficient
+   * probability by being made as 8 randomly generated bytes, encoded as a 16
+   * lowercase hex characters corresponding to 64 bits.
+   */
+  spanId: string;
+}

packages/opentelemetry-api/src/trace/span_context.ts

@@ -49,7 +49,7 @@ export interface SpanContext {
    *
    * SAMPLED = 0x1 and UNSAMPLED = 0x0;
    */
-  traceFlags?: TraceFlags;
+  traceFlags: TraceFlags;
   /**
    * Tracing-system-specific info to propagate.
    *

packages/opentelemetry-api/test/noop-implementations/noop-span.test.ts

@@ -39,18 +39,6 @@ describe('NoopSpan', () => {
     span.addEvent('sent');
     span.addEvent('sent', { id: '42', key: 'value' });
 
-    span.addLink({
-      traceId: 'd4cda95b652f4a1592b449d5929fda1b',
-      spanId: '6e0c63257de34c92',
-    });
-    span.addLink(
-      {
-        traceId: 'd4cda95b652f4a1592b449d5929fda1b',
-        spanId: '6e0c63257de34c92',
-      },
-      { id: '42', key: 'value' }
-    );
-
     span.setStatus({ code: CanonicalCode.CANCELLED });
 
     span.updateName('my-span');

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

@@ -20,7 +20,7 @@ import { Context } from '@opentelemetry/scope-base';
 
 describe('NoopTracer', () => {
   it('should not crash', () => {
-    const spanContext = { traceId: '', spanId: '' };
+    const spanContext = { traceId: '', spanId: '', traceFlags: 0 };
     const tracer = new NoopTracer();
 
     assert.deepStrictEqual(tracer.startSpan('span-name'), NOOP_SPAN);

packages/opentelemetry-core/src/context/propagation/BinaryTraceContext.ts

@@ -74,7 +74,7 @@ export class BinaryTraceContext implements BinaryFormat {
   }
 
   fromBytes(buf: Uint8Array): SpanContext | null {
-    const result: SpanContext = { traceId: '', spanId: '' };
+    const result: SpanContext = { traceId: '', spanId: '', traceFlags: 0 };
     // Length must be 29.
     if (buf.length !== FORMAT_LENGTH) return null;
     // Check version and field numbers.

packages/opentelemetry-core/test/context/B3Format.test.ts

@@ -82,6 +82,7 @@ describe('B3Format', () => {
       const emptySpanContext = {
         traceId: '',
         spanId: '',
+        traceFlags: 0,
       };
       b3Format.inject(
         setExtractedSpanContext(Context.ROOT_CONTEXT, emptySpanContext),
@@ -90,24 +91,6 @@ describe('B3Format', () => {
       assert.deepStrictEqual(carrier[X_B3_TRACE_ID], undefined);
       assert.deepStrictEqual(carrier[X_B3_SPAN_ID], undefined);
     });
-
-    it('should handle absence of sampling decision', () => {
-      const spanContext: SpanContext = {
-        traceId: 'd4cda95b652f4a1592b449d5929fda1b',
-        spanId: '6e0c63257de34c92',
-      };
-
-      b3Format.inject(
-        setExtractedSpanContext(Context.ROOT_CONTEXT, spanContext),
-        carrier
-      );
-      assert.deepStrictEqual(
-        carrier[X_B3_TRACE_ID],
-        'd4cda95b652f4a1592b449d5929fda1b'
-      );
-      assert.deepStrictEqual(carrier[X_B3_SPAN_ID], '6e0c63257de34c92');
-      assert.deepStrictEqual(carrier[X_B3_SAMPLED], undefined);
-    });
   });
 
   describe('.extract()', () => {

packages/opentelemetry-core/test/context/BinaryTraceContext.test.ts

@@ -68,7 +68,11 @@ describe('BinaryTraceContext', () => {
       description: 'span context with 64-bit span ID',
     },
     {
-      structured: { traceId: commonTraceId, spanId: commonSpanId },
+      structured: {
+        traceId: commonTraceId,
+        spanId: commonSpanId,
+        traceFlags: 0,
+      },
       binary: new Uint8Array([
         0,
         0,

packages/opentelemetry-core/test/trace/ProbabilitySampler.test.ts

@@ -24,13 +24,7 @@ import {
 describe('ProbabilitySampler', () => {
   it('should return a always sampler for 1', () => {
     const sampler = new ProbabilitySampler(1);
-    assert.strictEqual(
-      sampler.shouldSample({
-        traceId: 'd4cda95b652f4a1592b449d5929fda1b',
-        spanId: '6e0c63257de34c92',
-      }),
-      true
-    );
+    assert.strictEqual(sampler.shouldSample(), true);
   });
 
   it('should return a always sampler for >1', () => {

packages/opentelemetry-core/test/trace/spancontext-utils.test.ts

@@ -22,6 +22,7 @@ describe('spancontext-utils', () => {
     const spanContext = {
       traceId: 'd4cda95b652f4a1592b449d5929fda1b',
       spanId: '6e0c63257de34c92',
+      traceFlags: 0,
     };
     assert.ok(context.isValid(spanContext));
   });
@@ -30,6 +31,7 @@ describe('spancontext-utils', () => {
     const spanContext = {
       traceId: context.INVALID_TRACEID,
       spanId: '6e0c63257de34c92',
+      traceFlags: 0,
     };
     assert.ok(!context.isValid(spanContext));
   });
@@ -38,6 +40,7 @@ describe('spancontext-utils', () => {
     const spanContext = {
       traceId: 'd4cda95b652f4a1592b449d5929fda1b',
       spanId: context.INVALID_SPANID,
+      traceFlags: 0,
     };
     assert.ok(!context.isValid(spanContext));
   });
@@ -46,6 +49,7 @@ describe('spancontext-utils', () => {
     const spanContext = {
       traceId: context.INVALID_TRACEID,
       spanId: context.INVALID_SPANID,
+      traceFlags: 0,
     };
     assert.ok(!context.isValid(spanContext));
   });

packages/opentelemetry-exporter-collector/src/transform.ts

@@ -140,8 +140,8 @@ export function toCollectorLinkType(
   span: ReadableSpan,
   link: Link
 ): collectorTypes.LinkType {
-  const linkSpanId = link.spanContext.spanId;
-  const linkTraceId = link.spanContext.traceId;
+  const linkSpanId = link.linkContext.spanId;
+  const linkTraceId = link.linkContext.traceId;
   const spanParentId = span.parentSpanId;
   const spanTraceId = span.spanContext.traceId;
 
@@ -158,8 +158,8 @@ export function toCollectorLinkType(
 export function toCollectorLinks(span: ReadableSpan): collectorTypes.Links {
   const collectorLinks: collectorTypes.Link[] = span.links.map((link: Link) => {
     const collectorLink: collectorTypes.Link = {
-      traceId: hexToBase64(link.spanContext.traceId),
-      spanId: hexToBase64(link.spanContext.spanId),
+      traceId: hexToBase64(link.linkContext.traceId),
+      spanId: hexToBase64(link.linkContext.spanId),
       type: toCollectorLinkType(span, link),
     };
 

packages/opentelemetry-exporter-collector/test/helper.ts

@@ -36,10 +36,9 @@ export const mockedReadableSpan: ReadableSpan = {
   attributes: { component: 'document-load' },
   links: [
     {
-      spanContext: {
+      linkContext: {
         traceId: '1f1008dc8e270e85c40a0d7c3939b278',
         spanId: '78a8915098864388',
-        traceFlags: 1,
       },
       attributes: { component: 'document-load' },
     },

packages/opentelemetry-exporter-jaeger/src/transform.ts

@@ -103,12 +103,12 @@ function spanLinksToThriftRefs(
 ): ThriftReference[] {
   return links
     .map((link): ThriftReference | null => {
-      if (link.spanContext.spanId === parentSpanId) {
+      if (link.linkContext.spanId === parentSpanId) {
         const refType = ThriftReferenceType.CHILD_OF;
-        const traceId = link.spanContext.traceId;
+        const traceId = link.linkContext.traceId;
         const traceIdHigh = Utils.encodeInt64(traceId.slice(0, 16));
         const traceIdLow = Utils.encodeInt64(traceId.slice(16));
-        const spanId = Utils.encodeInt64(link.spanContext.spanId);
+        const spanId = Utils.encodeInt64(link.linkContext.spanId);
         return { traceIdLow, traceIdHigh, spanId, refType };
       }
       return null;

packages/opentelemetry-exporter-jaeger/test/jaeger.test.ts

@@ -110,6 +110,7 @@ describe('JaegerExporter', () => {
       const spanContext = {
         traceId: 'd4cda95b652f4a1592b449d5929fda1b',
         spanId: '6e0c63257de34c92',
+        traceFlags: 0,
       };
       const readableSpan: ReadableSpan = {
         name: 'my-span1',

packages/opentelemetry-exporter-jaeger/test/transform.test.ts

@@ -25,6 +25,7 @@ describe('transform', () => {
   const spanContext = {
     traceId: 'd4cda95b652f4a1592b449d5929fda1b',
     spanId: '6e0c63257de34c92',
+    traceFlags: 0,
   };
 
   describe('spanToThrift', () => {
@@ -45,7 +46,7 @@ describe('transform', () => {
         },
         links: [
           {
-            spanContext: {
+            linkContext: {
               traceId: 'a4cda95b652f4a1592b449d5929fda1b',
               spanId: '3e0c63257de34c92',
             },
@@ -194,7 +195,7 @@ describe('transform', () => {
         parentSpanId: '3e0c63257de34c92',
         links: [
           {
-            spanContext: {
+            linkContext: {
               traceId: 'a4cda95b652f4a1592b449d5929fda1b',
               spanId: '3e0c63257de34c92',
             },
@@ -227,6 +228,7 @@ describe('transform', () => {
         spanContext: {
           traceId: '92b449d5929fda1b',
           spanId: '6e0c63257de34c92',
+          traceFlags: 0,
         },
         startTime: [1566156729, 709],
         endTime: [1566156731, 709],

packages/opentelemetry-exporter-stackdriver-trace/src/transform.ts

@@ -77,8 +77,8 @@ export function getReadableSpanTransformer(
 function transformLink(link: ot.Link): Link {
   return {
     attributes: transformAttributes(link.attributes),
-    spanId: link.spanContext.spanId,
-    traceId: link.spanContext.traceId,
+    spanId: link.linkContext.spanId,
+    traceId: link.linkContext.traceId,
     type: LinkType.UNSPECIFIED,
   };
 }

packages/opentelemetry-exporter-stackdriver-trace/test/exporter.test.ts

@@ -115,6 +115,7 @@ describe('Stackdriver Trace Exporter', () => {
         spanContext: {
           traceId: 'd4cda95b652f4a1592b449d5929fda1b',
           spanId: '6e0c63257de34c92',
+          traceFlags: 0,
           isRemote: true,
         },
         status: { code: types.CanonicalCode.OK },
@@ -147,6 +148,7 @@ describe('Stackdriver Trace Exporter', () => {
         spanContext: {
           traceId: 'd4cda95b652f4a1592b449d5929fda1b',
           spanId: '6e0c63257de34c92',
+          traceFlags: 0,
           isRemote: true,
         },
         status: { code: types.CanonicalCode.OK },
@@ -178,6 +180,7 @@ describe('Stackdriver Trace Exporter', () => {
         spanContext: {
           traceId: 'd4cda95b652f4a1592b449d5929fda1b',
           spanId: '6e0c63257de34c92',
+          traceFlags: 0,
           isRemote: true,
         },
         status: { code: types.CanonicalCode.OK },
@@ -207,6 +210,7 @@ describe('Stackdriver Trace Exporter', () => {
         spanContext: {
           traceId: 'd4cda95b652f4a1592b449d5929fda1b',
           spanId: '6e0c63257de34c92',
+          traceFlags: 0,
           isRemote: true,
         },
         status: { code: types.CanonicalCode.OK },

packages/opentelemetry-exporter-stackdriver-trace/test/transform.test.ts

@@ -31,6 +31,7 @@ describe('transform', () => {
     spanContext = {
       traceId: 'd4cda95b652f4a1592b449d5929fda1b',
       spanId: '6e0c63257de34c92',
+      traceFlags: 0,
       isRemote: true,
     };
 
@@ -131,11 +132,9 @@ describe('transform', () => {
 
   it('should transform links', () => {
     readableSpan.links.push({
-      spanContext: {
+      linkContext: {
         traceId: 'a4cda95b652f4a1592b449d5929fda1b',
         spanId: '3e0c63257de34c92',
-        isRemote: true,
-        traceFlags: types.TraceFlags.SAMPLED,
       },
     });
 
@@ -158,11 +157,9 @@ describe('transform', () => {
 
   it('should transform links with attributes', () => {
     readableSpan.links.push({
-      spanContext: {
+      linkContext: {
         traceId: 'a4cda95b652f4a1592b449d5929fda1b',
         spanId: '3e0c63257de34c92',
-        isRemote: true,
-        traceFlags: types.TraceFlags.SAMPLED,
       },
       attributes: {
         testAttr: 'value',