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73 lines
2.4 KiB
JavaScript
73 lines
2.4 KiB
JavaScript
2 years ago
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.ReadConcern = exports.ReadConcernLevel = void 0;
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/** @public */
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exports.ReadConcernLevel = Object.freeze({
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local: 'local',
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majority: 'majority',
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linearizable: 'linearizable',
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available: 'available',
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snapshot: 'snapshot'
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});
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/**
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* The MongoDB ReadConcern, which allows for control of the consistency and isolation properties
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* of the data read from replica sets and replica set shards.
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* @public
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*
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* @see https://www.mongodb.com/docs/manual/reference/read-concern/index.html
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*/
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class ReadConcern {
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/** Constructs a ReadConcern from the read concern level.*/
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constructor(level) {
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/**
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* A spec test exists that allows level to be any string.
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* "invalid readConcern with out stage"
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* @see ./test/spec/crud/v2/aggregate-out-readConcern.json
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* @see https://github.com/mongodb/specifications/blob/master/source/read-write-concern/read-write-concern.rst#unknown-levels-and-additional-options-for-string-based-readconcerns
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*/
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this.level = exports.ReadConcernLevel[level] ?? level;
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}
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/**
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* Construct a ReadConcern given an options object.
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*
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* @param options - The options object from which to extract the write concern.
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*/
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static fromOptions(options) {
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if (options == null) {
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return;
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}
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if (options.readConcern) {
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const { readConcern } = options;
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if (readConcern instanceof ReadConcern) {
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return readConcern;
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}
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else if (typeof readConcern === 'string') {
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return new ReadConcern(readConcern);
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}
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else if ('level' in readConcern && readConcern.level) {
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return new ReadConcern(readConcern.level);
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}
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}
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if (options.level) {
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return new ReadConcern(options.level);
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}
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return;
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}
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static get MAJORITY() {
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return exports.ReadConcernLevel.majority;
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}
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static get AVAILABLE() {
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return exports.ReadConcernLevel.available;
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}
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static get LINEARIZABLE() {
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return exports.ReadConcernLevel.linearizable;
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}
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static get SNAPSHOT() {
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return exports.ReadConcernLevel.snapshot;
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}
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toJSON() {
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return { level: this.level };
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}
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}
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exports.ReadConcern = ReadConcern;
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//# sourceMappingURL=read_concern.js.map
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