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| 1 | +/* |
| 2 | + * Copyright The OpenTelemetry Authors |
| 3 | + * |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + * you may not use this file except in compliance with the License. |
| 6 | + * You may obtain a copy of the License at |
| 7 | + * |
| 8 | + * https://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * |
| 10 | + * Unless required by applicable law or agreed to in writing, software |
| 11 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + * See the License for the specific language governing permissions and |
| 14 | + * limitations under the License. |
| 15 | + * |
| 16 | + * NOTICE from the Sentry authors: |
| 17 | + * - Vendored from: https://github.com/open-telemetry/opentelemetry-js-contrib/tree/ed97091c9890dd18e52759f2ea98e9d7593b3ae4/packages/instrumentation-lru-memoizer |
| 18 | + * - Upstream version: @opentelemetry/instrumentation-lru-memoizer@0.58.0 |
| 19 | + */ |
| 20 | +/* eslint-disable */ |
| 21 | + |
| 22 | +import { context } from '@opentelemetry/api'; |
| 23 | +import { |
| 24 | + InstrumentationBase, |
| 25 | + InstrumentationConfig, |
| 26 | + InstrumentationNodeModuleDefinition, |
| 27 | +} from '@opentelemetry/instrumentation'; |
| 28 | +import { SDK_VERSION } from '@sentry/core'; |
| 29 | + |
| 30 | +const PACKAGE_NAME = '@sentry/instrumentation-lru-memoizer'; |
| 31 | + |
| 32 | +export class LruMemoizerInstrumentation extends InstrumentationBase { |
| 33 | + constructor(config: InstrumentationConfig = {}) { |
| 34 | + super(PACKAGE_NAME, SDK_VERSION, config); |
| 35 | + } |
| 36 | + |
| 37 | + init(): InstrumentationNodeModuleDefinition[] { |
| 38 | + return [ |
| 39 | + new InstrumentationNodeModuleDefinition( |
| 40 | + 'lru-memoizer', |
| 41 | + ['>=1.3 <4'], |
| 42 | + moduleExports => { |
| 43 | + // moduleExports is a function which receives an options object, |
| 44 | + // and returns a "memoizer" function upon invocation. |
| 45 | + // We want to patch this "memoizer's" internal function |
| 46 | + const asyncMemoizer = function (this: unknown) { |
| 47 | + // This following function is invoked every time the user wants to get a (possible) memoized value |
| 48 | + // We replace it with another function in which we bind the current context to the last argument (callback) |
| 49 | + const origMemoizer = moduleExports.apply(this, arguments); |
| 50 | + return function (this: unknown) { |
| 51 | + const modifiedArguments = [...arguments]; |
| 52 | + // last argument is the callback |
| 53 | + const origCallback = modifiedArguments.pop(); |
| 54 | + const callbackWithContext = |
| 55 | + typeof origCallback === 'function' ? context.bind(context.active(), origCallback) : origCallback; |
| 56 | + modifiedArguments.push(callbackWithContext); |
| 57 | + return origMemoizer.apply(this, modifiedArguments); |
| 58 | + }; |
| 59 | + }; |
| 60 | + |
| 61 | + // sync function preserves context, but we still need to export it |
| 62 | + // as the lru-memoizer package does |
| 63 | + asyncMemoizer.sync = moduleExports.sync; |
| 64 | + return asyncMemoizer; |
| 65 | + }, |
| 66 | + undefined, // no need to disable as this instrumentation does not create any spans |
| 67 | + ), |
| 68 | + ]; |
| 69 | + } |
| 70 | +} |
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