| 1 | ;
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| 2 | /*!
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| 3 | * Copyright 2017 Google Inc. All Rights Reserved.
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| 4 | *
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| 5 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 6 | * you may not use this file except in compliance with the License.
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| 7 | * You may obtain a copy of the License at
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| 8 | *
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| 9 | * http://www.apache.org/licenses/LICENSE-2.0
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| 10 | *
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| 11 | * Unless required by applicable law or agreed to in writing, software
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| 12 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 14 | * See the License for the specific language governing permissions and
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| 15 | * limitations under the License.
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| 16 | */
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| 17 | Object.defineProperty(exports, "__esModule", { value: true });
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| 18 | exports.Throttler = exports.noop = exports.promisifySome = void 0;
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| 19 | const promisify_1 = require("@google-cloud/promisify");
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| 20 | /**
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| 21 | * This replaces usage of promisifyAll(), going forward. Instead of opting
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| 22 | * some methods out, you will need to opt methods in. Additionally, this
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| 23 | * function validates method names against the class using TypeScript,
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| 24 | * to generate compile-time failures for misspellings and changes.
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| 25 | *
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| 26 | * Future work in the library should all be Promise-first.
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| 27 | *
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| 28 | * @private
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| 29 | */
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| 30 | function promisifySome(class_, classProto, methods, options) {
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| 31 | methods.forEach(methodName => {
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| 32 | // Do the same stream checks as promisifyAll().
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| 33 | const m = classProto[methodName];
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| 34 | classProto[methodName] = (0, promisify_1.promisify)(m, options);
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| 35 | });
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| 36 | }
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| 37 | exports.promisifySome = promisifySome;
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| 38 | function noop() { }
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| 39 | exports.noop = noop;
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| 40 | /**
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| 41 | * Provides a very simple throttling capability for tasks like error logs.
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| 42 | * This ensures that no task is actually completed unless N millis have passed
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| 43 | * since the last one.
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| 44 | *
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| 45 | * @private
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| 46 | */
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| 47 | class Throttler {
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| 48 | constructor(minMillis) {
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| 49 | this.minMillis = minMillis;
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| 50 | }
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| 51 | /**
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| 52 | * Performs the task requested, if enough time has passed since the
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| 53 | * last successful call.
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| 54 | */
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| 55 | doMaybe(task) {
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| 56 | const now = Date.now();
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| 57 | const doTask = !this.lastTime ||
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| 58 | (this.lastTime && now - this.lastTime >= this.minMillis);
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| 59 | if (doTask) {
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| 60 | task();
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| 61 | this.lastTime = now;
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| 62 | }
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| 63 | }
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| 64 | }
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| 65 | exports.Throttler = Throttler;
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| 66 | //# sourceMappingURL=util.js.map |
| \ | No newline at end of file |