feature(views): move views registration to MeterProvider constructor

experimental/CHANGELOG.md

@@ -6,6 +6,8 @@ All notable changes to experimental packages in this project will be documented
 
 ### :boom: Breaking Change
 
+* feature(views): move views registration to MeterProvider constructor [#3066](https://github.com/open-telemetry/opentelemetry-js/pull/3066) @pichlermarc
+
 ### :rocket: (Enhancement)
 
 ### :bug: (Bug Fix)

experimental/packages/opentelemetry-exporter-metrics-otlp-grpc/test/metricsHelper.ts

@@ -24,6 +24,7 @@ import {
   ExplicitBucketHistogramAggregation,
   MeterProvider,
   MetricReader,
+  View,
 } from '@opentelemetry/sdk-metrics-base';
 import { IKeyValue, IMetric, IResource } from '@opentelemetry/otlp-transformer';
 
@@ -59,7 +60,15 @@ export async function collect() {
 }
 
 export function setUp() {
-  meterProvider = new MeterProvider({ resource: testResource });
+  meterProvider = new MeterProvider({
+    resource: testResource,
+    views: [
+      new View({
+        aggregation: new ExplicitBucketHistogramAggregation([0, 100]),
+        instrumentName: 'int-histogram',
+      })
+    ]
+  });
   reader = new TestMetricReader();
   meterProvider.addMetricReader(
     reader
@@ -96,10 +105,7 @@ export function mockObservableGauge(
 }
 
 export function mockHistogram(): Histogram {
-  const name = 'int-histogram';
-  meterProvider.addView({ aggregation: new ExplicitBucketHistogramAggregation([0, 100]) });
-
-  return meter.createHistogram(name, {
+  return meter.createHistogram('int-histogram', {
     description: 'sample histogram description',
     valueType: ValueType.INT,
   });

experimental/packages/opentelemetry-exporter-metrics-otlp-http/test/browser/CollectorMetricExporter.test.ts

@@ -27,7 +27,7 @@ import {
   ensureExportMetricsServiceRequestIsSet, ensureHeadersContain,
   ensureHistogramIsCorrect,
   ensureObservableGaugeIsCorrect,
-  ensureWebResourceIsCorrect,
+  ensureWebResourceIsCorrect, HISTOGRAM_AGGREGATION_VIEW,
   mockCounter,
   mockHistogram,
   mockObservableGauge,
@@ -47,7 +47,7 @@ describe('OTLPMetricExporter - web', () => {
   let errorStub: sinon.SinonStub;
 
   beforeEach(async () => {
-    setUp();
+    setUp([HISTOGRAM_AGGREGATION_VIEW]);
     stubOpen = sinon.stub(XMLHttpRequest.prototype, 'open');
     sinon.stub(XMLHttpRequest.prototype, 'send');
     stubBeacon = sinon.stub(navigator, 'sendBeacon');

experimental/packages/opentelemetry-exporter-metrics-otlp-http/test/metricsHelper.ts

@@ -30,7 +30,8 @@ import {
   AggregationTemporality,
   ExplicitBucketHistogramAggregation,
   MeterProvider,
-  MetricReader
+  MetricReader,
+  View
 } from '@opentelemetry/sdk-metrics-base';
 import {
   IExportMetricsServiceRequest,
@@ -61,6 +62,11 @@ class TestMetricReader extends MetricReader {
   }
 }
 
+export const HISTOGRAM_AGGREGATION_VIEW = new View({
+  aggregation: new ExplicitBucketHistogramAggregation([0, 100]),
+  instrumentName: 'int-histogram',
+});
+
 const defaultResource = Resource.default().merge(new Resource({
   service: 'ui',
   version: 1,
@@ -78,8 +84,8 @@ export async function collect() {
   return (await reader.collect())!;
 }
 
-export function setUp() {
-  meterProvider = new MeterProvider({ resource: defaultResource });
+export function setUp(views?: View[]) {
+  meterProvider = new MeterProvider({ resource: defaultResource, views });
   reader = new TestMetricReader();
   meterProvider.addMetricReader(
     reader
@@ -124,7 +130,6 @@ export function mockDoubleCounter(): Counter {
 }
 
 
-
 export function mockObservableCounter(
   callback: (observableResult: ObservableResult) => void,
   name = 'double-observable-counter'
@@ -158,18 +163,7 @@ export function mockObservableUpDownCounter(
 }
 
 export function mockHistogram(): Histogram {
-  const name = 'int-histogram';
-
-  meterProvider.addView({
-    aggregation: new ExplicitBucketHistogramAggregation([0, 100])
-  },
-  {
-    instrument: {
-      name: name
-    }
-  });
-
-  return meter.createHistogram(name, {
+  return meter.createHistogram('int-histogram', {
     description: 'sample histogram description',
     valueType: ValueType.INT,
   });

experimental/packages/opentelemetry-exporter-metrics-otlp-http/test/node/CollectorMetricExporter.test.ts

@@ -35,7 +35,10 @@ import {
   mockCounter,
   mockObservableGauge,
   mockHistogram,
-  collect, shutdown, setUp,
+  collect,
+  shutdown,
+  setUp,
+  HISTOGRAM_AGGREGATION_VIEW,
 } from '../metricsHelper';
 import { MockedResponse } from './nodeHelpers';
 import { AggregationTemporality, ResourceMetrics } from '@opentelemetry/sdk-metrics-base';
@@ -54,7 +57,7 @@ describe('OTLPMetricExporter - node with json over http', () => {
   let metrics: ResourceMetrics;
 
   beforeEach(async () => {
-    setUp();
+    setUp([HISTOGRAM_AGGREGATION_VIEW]);
   });
 
   afterEach(async () => {

experimental/packages/opentelemetry-exporter-metrics-otlp-proto/test/metricsHelper.ts

@@ -27,7 +27,8 @@ import {
   AggregationTemporality,
   ExplicitBucketHistogramAggregation,
   MeterProvider,
-  MetricReader
+  MetricReader,
+  View
 } from '@opentelemetry/sdk-metrics-base';
 import { IExportMetricsServiceRequest, IKeyValue, IMetric } from '@opentelemetry/otlp-transformer';
 import { Stream } from 'stream';
@@ -64,7 +65,15 @@ export async function collect() {
 }
 
 export function setUp() {
-  meterProvider = new MeterProvider({ resource: testResource });
+  meterProvider = new MeterProvider({
+    resource: testResource,
+    views: [
+      new View({
+        aggregation: new ExplicitBucketHistogramAggregation([0, 100]),
+        instrumentName: 'int-histogram',
+      })
+    ]
+  });
   reader = new TestMetricReader();
   meterProvider.addMetricReader(
     reader
@@ -102,7 +111,6 @@ export function mockObservableGauge(
 
 export function mockHistogram(): Histogram {
   const name = 'int-histogram';
-  meterProvider.addView({ aggregation: new ExplicitBucketHistogramAggregation([0, 100]) });
 
   return meter.createHistogram(name, {
     description: 'sample histogram description',

experimental/packages/opentelemetry-exporter-prometheus/test/PrometheusSerializer.test.ts

@@ -25,6 +25,7 @@ import {
   ExplicitBucketHistogramAggregation,
   SumAggregation,
   Histogram,
+  View,
 } from '@opentelemetry/sdk-metrics-base';
 import * as sinon from 'sinon';
 import { PrometheusSerializer } from '../src';
@@ -45,6 +46,7 @@ class TestMetricReader extends MetricReader {
   }
 
   async onForceFlush() {}
+
   async onShutdown() {}
 }
 
@@ -67,11 +69,12 @@ describe('PrometheusSerializer', () => {
     describe('Singular', () => {
       async function testSerializer(serializer: PrometheusSerializer) {
         const reader = new TestMetricReader();
-        const meterProvider = new MeterProvider();
+        const meterProvider = new MeterProvider(
+          {
+            views: [new View({ aggregation: new SumAggregation(), instrumentName: '*' })]
+          }
+        );
         meterProvider.addMetricReader(reader);
-        meterProvider.addView({
-          aggregation: new SumAggregation(),
-        });
         const meter = meterProvider.getMeter('test');
 
         const counter = meter.createCounter('test_total');
@@ -112,9 +115,13 @@ describe('PrometheusSerializer', () => {
     describe('Histogram', () => {
       async function testSerializer(serializer: PrometheusSerializer) {
         const reader = new TestMetricReader();
-        const meterProvider = new MeterProvider();
+        const meterProvider = new MeterProvider({
+          views: [new View({
+            aggregation: new ExplicitBucketHistogramAggregation([1, 10, 100]),
+            instrumentName: '*'
+          })]
+        });
         meterProvider.addMetricReader(reader);
-        meterProvider.addView({ aggregation: new ExplicitBucketHistogramAggregation([1, 10, 100]) });
         const meter = meterProvider.getMeter('test');
 
         const histogram = meter.createHistogram('test');
@@ -167,9 +174,10 @@ describe('PrometheusSerializer', () => {
     describe('Singular', () => {
       async function testSerializer(serializer: PrometheusSerializer) {
         const reader = new TestMetricReader();
-        const meterProvider = new MeterProvider();
+        const meterProvider = new MeterProvider({
+          views: [new View({ aggregation: new SumAggregation(), instrumentName: '*' })]
+        });
         meterProvider.addMetricReader(reader);
-        meterProvider.addView({ aggregation: new SumAggregation() });
         const meter = meterProvider.getMeter('test');
 
         const counter = meter.createCounter('test_total', {
@@ -216,9 +224,13 @@ describe('PrometheusSerializer', () => {
     describe('with ExplicitBucketHistogramAggregation', () => {
       async function testSerializer(serializer: PrometheusSerializer) {
         const reader = new TestMetricReader();
-        const meterProvider = new MeterProvider();
+        const meterProvider = new MeterProvider({
+          views: [new View({
+            aggregation: new ExplicitBucketHistogramAggregation([1, 10, 100]),
+            instrumentName: '*'
+          })]
+        });
         meterProvider.addMetricReader(reader);
-        meterProvider.addView({ aggregation: new ExplicitBucketHistogramAggregation([1, 10, 100]) });
         const meter = meterProvider.getMeter('test');
 
         const histogram = meter.createHistogram('test', {
@@ -267,9 +279,10 @@ describe('PrometheusSerializer', () => {
   describe('validate against metric conventions', () => {
     async function getCounterResult(name: string, serializer: PrometheusSerializer) {
       const reader = new TestMetricReader();
-      const meterProvider = new MeterProvider();
+      const meterProvider = new MeterProvider({
+        views: [new View({ aggregation: new SumAggregation(), instrumentName: '*' })]
+      });
       meterProvider.addMetricReader(reader);
-      meterProvider.addView({ aggregation: new SumAggregation() });
       const meter = meterProvider.getMeter('test');
 
       const counter = meter.createCounter(name);
@@ -306,9 +319,10 @@ describe('PrometheusSerializer', () => {
   describe('serialize non-normalized values', () => {
     async function testSerializer(serializer: PrometheusSerializer, name: string, fn: (counter: UpDownCounter) => void) {
       const reader = new TestMetricReader();
-      const meterProvider = new MeterProvider();
+      const meterProvider = new MeterProvider({
+        views: [new View({ aggregation: new SumAggregation(), instrumentName: '*' })]
+      });
       meterProvider.addMetricReader(reader);
-      meterProvider.addView({ aggregation: new SumAggregation() });
       const meter = meterProvider.getMeter('test');
 
       const counter = meter.createUpDownCounter(name);

experimental/packages/opentelemetry-sdk-metrics-base/README.md

@@ -58,6 +58,19 @@ async function batchObservableCallback(batchObservableResult) {
 }
 ```
 
+Views can be registered when instantiating a `MeterProvider`:
+
+```js
+const meterProvider = new MeterProvider({
+  views: [
+    // override the bucket boundaries on `my.histogram` to [0, 50, 100]
+    new View({ aggregation: new ExplicitBucketHistogramAggregation([0, 50, 100]), instrumentName: 'my.histogram'}),
+    // rename 'my.counter' to 'my.renamed.counter'
+    new View({ name: 'my.renamed.counter', instrumentName: 'my.counter'})
+  ]
+})
+```
+
 ## Example
 
 See [examples/prometheus](https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/examples/prometheus) for an end-to-end example, including exporting metrics.