Repository: jike-engineering/mongo-es Branch: master Commit: 019e37686a76 Files: 22 Total size: 59.5 KB Directory structure: gitextract_qgmg3l8r/ ├── .gitignore ├── .npmignore ├── .npmrc ├── .prettierignore ├── .prettierrc ├── README.md ├── examples/ │ ├── config.json │ └── example.js ├── license ├── package.json ├── src/ │ ├── config.ts │ ├── elasticsearch.ts │ ├── index.ts │ ├── indices.ts │ ├── main.ts │ ├── mongodb.ts │ ├── processor.ts │ └── types.ts ├── test/ │ ├── _init.ts │ ├── elasticsearch.test.ts │ └── processor.test.ts └── tsconfig.json ================================================ FILE CONTENTS ================================================ ================================================ FILE: .gitignore ================================================ .idea/ node_modules/ dist/ *temp* npm-debug.log* ================================================ FILE: .npmignore ================================================ node_modules/ *temp* ================================================ FILE: .npmrc ================================================ registry=https://registry.npmjs.org ================================================ FILE: .prettierignore ================================================ package-lock.json dist/ .* license ================================================ FILE: .prettierrc ================================================ { "printWidth": 100, "semi": false, "singleQuote": true, "trailingComma": "all" } ================================================ FILE: README.md ================================================ # Mongo-ES A MongoDB to Elasticsearch connector [![npm version](https://badge.fury.io/js/mongo-es.svg)](https://badge.fury.io/js/mongo-es) ## Installation ```bash npm i -g mongo-es ``` ## Usage ### Command Line ```bash # normal mode mongo-es ./config.json # debug mode, with debug info printed NODE_ENV=dev mongo-es ./config.json ``` ### Programmatically ```javascript const fs = require('fs') const Redis = require('ioredis') const { Config, Task, run } = require('mongo-es') const redis = new Redis('localhost') Task.onSaveCheckpoint((name, checkpoint) => { return redis.set(`mongo-es:${name}`, JSON.stringify(checkpoint)) }) // this will overwrite task.from in config file Task.onLoadCheckpoint((name) => { return redis.get(`mongo-es:${name}`).then(JSON.parse) }) run(new Config(fs.readFileSync('config.json', 'utf8'))) ``` ## Concepts ### Scan phase scan entire database for existed documents ### Tail phase tail the oplog for documents' create, update or delete ## Configuration Structure: ```json { "controls": {}, "mongodb": {}, "elasticsearch": {}, "tasks": [ { "extract": {}, "transform": {}, "load": {} } ] } ``` [Detail example](https://github.com/jike-engineering/mongo-es/blob/master/examples/config.json) ### controls - `mongodbReadCapacity` - Max docs read per second (default: `10000`). (optional) - `elasticsearchBulkInterval` - Max bluk interval per request (default: `5000`). (optional) - `elasticsearchBulkSize` - Max bluk size per request (default: `5000`). (optional) - `indexNameSuffix` - Index name suffix, for index version control. (optional) ### mongodb - `url` - The connection URI string, eg: `mongodb://user:password@localhost:27017/db?replicaSet=rs0`. **notice**: must use a `admin` user to access oplog. - `options` - Connection settings, see: [MongoClient](http://mongodb.github.io/node-mongodb-native/2.1/api/MongoClient.html#.connect). (optional) ### elasticsearch - `options` - Elasticsearch Config Options, see: [Configuration](https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/configuration.html). - `indices` - If set, auto create indices when program start, see: [Indeces Create](https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/api-reference-5-0.html#api-indices-create-5-0). (optional) ### task.from - `phase` - `scan` or `tail` - `time` - tail oplog with query: `{ ts: { $gte: new Timestamp(0, new Date(time).getTime() / 1000) } }` - `id` - scan collection with query `{ _id: { $gte: id }}` ### task.extract - `db` - Database name. - `collection` - Collection name in database. - `projection` - Projection selector, see [Projection](https://docs.mongodb.com/manual/reference/operator/projection/). ### task.transform - `mapping` - The field mapping from mongodb's collection to elasticsearch's index. - `parent` - The field in mongodb's collection to use as the `_parent` in elasticsearch's index. (optional) ### task.load - `index` - The name of the index. - `type` - The name of the document type. - `body` - The request body, see [Put Mapping](https://www.elastic.co/guide/en/elasticsearch/reference/5.x/indices-put-mapping.html). ## License [Mozilla Public License Version 2.0](https://www.mozilla.org/en-US/MPL/2.0/) ================================================ FILE: examples/config.json ================================================ { "controls": { "mongodbReadCapacity": 10000, "elasticsearchBulkSize": 5000, "elasticsearchBulkInterval": 5000, "indexNameSuffix": "_v1" }, "mongodb": { "url": "mongodb://user:password@localhost:27017/db?replicaSet=rs0", "options": { "authSource": "admin", "readPreference": "secondaryPreferred" } }, "elasticsearch": { "options": { "host": "http://host:9200", "apiVersion": "5.2" }, "indices": [ { "index": "banner", "body": { "settings": { "index": { "number_of_shards": 3, "number_of_replicas": 1, "mapper.dynamic": false } } } } ] }, "tasks": [ { "from": { "phase": "tail", "time": "2017-08-16T10:55:24.474Z" }, "extract": { "db": "jike", "collection": "banners", "projection": { "name": 1, "shareCount.all": 1, "deleted": 1 } }, "transform": { "mapping": { "name": "name", "shareCount.all": "shareCount.all", "deleted": "isDeleted" } }, "load": { "index": "banner", "type": "banner", "body": { "dynamic": false, "properties": { "name": { "type": "text", "analyzer": "ik_max_word", "search_analyzer": "ik_smart", "fields": { "exact": { "type": "keyword" } } }, "shareCount.all": { "type": "long" }, "isDeleted": { "type": "boolean" } } } } } ] } ================================================ FILE: examples/example.js ================================================ const fs = require('fs') const Redis = require('ioredis') const { Config, Task, run } = require('../dist/src/index') const redis = new Redis('localhost') Task.onSaveCheckpoint((name, checkpoint) => { return redis.set(`mongo-es:${name}`, JSON.stringify(checkpoint)) }) Task.onLoadCheckpoint((name) => { return redis.get(`mongo-es:${name}`).then((str) => { console.log('loaded', `mongo-es:${name}`, str) return JSON.parse(str) }) }) run(new Config(fs.readFileSync('examples/config.json', 'utf8'))) ================================================ FILE: license ================================================ Mozilla Public License Version 2.0 ================================== 1. Definitions -------------- 1.1. "Contributor" means each individual or legal entity that creates, contributes to the creation of, or owns Covered Software. 1.2. "Contributor Version" means the combination of the Contributions of others (if any) used by a Contributor and that particular Contributor's Contribution. 1.3. "Contribution" means Covered Software of a particular Contributor. 1.4. "Covered Software" means Source Code Form to which the initial Contributor has attached the notice in Exhibit A, the Executable Form of such Source Code Form, and Modifications of such Source Code Form, in each case including portions thereof. 1.5. "Incompatible With Secondary Licenses" means (a) that the initial Contributor has attached the notice described in Exhibit B to the Covered Software; or (b) that the Covered Software was made available under the terms of version 1.1 or earlier of the License, but not also under the terms of a Secondary License. 1.6. "Executable Form" means any form of the work other than Source Code Form. 1.7. "Larger Work" means a work that combines Covered Software with other material, in a separate file or files, that is not Covered Software. 1.8. "License" means this document. 1.9. "Licensable" means having the right to grant, to the maximum extent possible, whether at the time of the initial grant or subsequently, any and all of the rights conveyed by this License. 1.10. "Modifications" means any of the following: (a) any file in Source Code Form that results from an addition to, deletion from, or modification of the contents of Covered Software; or (b) any new file in Source Code Form that contains any Covered Software. 1.11. "Patent Claims" of a Contributor means any patent claim(s), including without limitation, method, process, and apparatus claims, in any patent Licensable by such Contributor that would be infringed, but for the grant of the License, by the making, using, selling, offering for sale, having made, import, or transfer of either its Contributions or its Contributor Version. 1.12. "Secondary License" means either the GNU General Public License, Version 2.0, the GNU Lesser General Public License, Version 2.1, the GNU Affero General Public License, Version 3.0, or any later versions of those licenses. 1.13. "Source Code Form" means the form of the work preferred for making modifications. 1.14. "You" (or "Your") means an individual or a legal entity exercising rights under this License. For legal entities, "You" includes any entity that controls, is controlled by, or is under common control with You. For purposes of this definition, "control" means (a) the power, direct or indirect, to cause the direction or management of such entity, whether by contract or otherwise, or (b) ownership of more than fifty percent (50%) of the outstanding shares or beneficial ownership of such entity. 2. License Grants and Conditions -------------------------------- 2.1. Grants Each Contributor hereby grants You a world-wide, royalty-free, non-exclusive license: (a) under intellectual property rights (other than patent or trademark) Licensable by such Contributor to use, reproduce, make available, modify, display, perform, distribute, and otherwise exploit its Contributions, either on an unmodified basis, with Modifications, or as part of a Larger Work; and (b) under Patent Claims of such Contributor to make, use, sell, offer for sale, have made, import, and otherwise transfer either its Contributions or its Contributor Version. 2.2. Effective Date The licenses granted in Section 2.1 with respect to any Contribution become effective for each Contribution on the date the Contributor first distributes such Contribution. 2.3. Limitations on Grant Scope The licenses granted in this Section 2 are the only rights granted under this License. No additional rights or licenses will be implied from the distribution or licensing of Covered Software under this License. Notwithstanding Section 2.1(b) above, no patent license is granted by a Contributor: (a) for any code that a Contributor has removed from Covered Software; or (b) for infringements caused by: (i) Your and any other third party's modifications of Covered Software, or (ii) the combination of its Contributions with other software (except as part of its Contributor Version); or (c) under Patent Claims infringed by Covered Software in the absence of its Contributions. This License does not grant any rights in the trademarks, service marks, or logos of any Contributor (except as may be necessary to comply with the notice requirements in Section 3.4). 2.4. Subsequent Licenses No Contributor makes additional grants as a result of Your choice to distribute the Covered Software under a subsequent version of this License (see Section 10.2) or under the terms of a Secondary License (if permitted under the terms of Section 3.3). 2.5. Representation Each Contributor represents that the Contributor believes its Contributions are its original creation(s) or it has sufficient rights to grant the rights to its Contributions conveyed by this License. 2.6. Fair Use This License is not intended to limit any rights You have under applicable copyright doctrines of fair use, fair dealing, or other equivalents. 2.7. Conditions Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted in Section 2.1. 3. Responsibilities ------------------- 3.1. Distribution of Source Form All distribution of Covered Software in Source Code Form, including any Modifications that You create or to which You contribute, must be under the terms of this License. You must inform recipients that the Source Code Form of the Covered Software is governed by the terms of this License, and how they can obtain a copy of this License. You may not attempt to alter or restrict the recipients' rights in the Source Code Form. 3.2. Distribution of Executable Form If You distribute Covered Software in Executable Form then: (a) such Covered Software must also be made available in Source Code Form, as described in Section 3.1, and You must inform recipients of the Executable Form how they can obtain a copy of such Source Code Form by reasonable means in a timely manner, at a charge no more than the cost of distribution to the recipient; and (b) You may distribute such Executable Form under the terms of this License, or sublicense it under different terms, provided that the license for the Executable Form does not attempt to limit or alter the recipients' rights in the Source Code Form under this License. 3.3. Distribution of a Larger Work You may create and distribute a Larger Work under terms of Your choice, provided that You also comply with the requirements of this License for the Covered Software. If the Larger Work is a combination of Covered Software with a work governed by one or more Secondary Licenses, and the Covered Software is not Incompatible With Secondary Licenses, this License permits You to additionally distribute such Covered Software under the terms of such Secondary License(s), so that the recipient of the Larger Work may, at their option, further distribute the Covered Software under the terms of either this License or such Secondary License(s). 3.4. Notices You may not remove or alter the substance of any license notices (including copyright notices, patent notices, disclaimers of warranty, or limitations of liability) contained within the Source Code Form of the Covered Software, except that You may alter any license notices to the extent required to remedy known factual inaccuracies. 3.5. Application of Additional Terms You may choose to offer, and to charge a fee for, warranty, support, indemnity or liability obligations to one or more recipients of Covered Software. However, You may do so only on Your own behalf, and not on behalf of any Contributor. You must make it absolutely clear that any such warranty, support, indemnity, or liability obligation is offered by You alone, and You hereby agree to indemnify every Contributor for any liability incurred by such Contributor as a result of warranty, support, indemnity or liability terms You offer. You may include additional disclaimers of warranty and limitations of liability specific to any jurisdiction. 4. Inability to Comply Due to Statute or Regulation --------------------------------------------------- If it is impossible for You to comply with any of the terms of this License with respect to some or all of the Covered Software due to statute, judicial order, or regulation then You must: (a) comply with the terms of this License to the maximum extent possible; and (b) describe the limitations and the code they affect. Such description must be placed in a text file included with all distributions of the Covered Software under this License. Except to the extent prohibited by statute or regulation, such description must be sufficiently detailed for a recipient of ordinary skill to be able to understand it. 5. Termination -------------- 5.1. The rights granted under this License will terminate automatically if You fail to comply with any of its terms. However, if You become compliant, then the rights granted under this License from a particular Contributor are reinstated (a) provisionally, unless and until such Contributor explicitly and finally terminates Your grants, and (b) on an ongoing basis, if such Contributor fails to notify You of the non-compliance by some reasonable means prior to 60 days after You have come back into compliance. Moreover, Your grants from a particular Contributor are reinstated on an ongoing basis if such Contributor notifies You of the non-compliance by some reasonable means, this is the first time You have received notice of non-compliance with this License from such Contributor, and You become compliant prior to 30 days after Your receipt of the notice. 5.2. If You initiate litigation against any entity by asserting a patent infringement claim (excluding declaratory judgment actions, counter-claims, and cross-claims) alleging that a Contributor Version directly or indirectly infringes any patent, then the rights granted to You by any and all Contributors for the Covered Software under Section 2.1 of this License shall terminate. 5.3. In the event of termination under Sections 5.1 or 5.2 above, all end user license agreements (excluding distributors and resellers) which have been validly granted by You or Your distributors under this License prior to termination shall survive termination. ************************************************************************ * * * 6. Disclaimer of Warranty * * ------------------------- * * * * Covered Software is provided under this License on an "as is" * * basis, without warranty of any kind, either expressed, implied, or * * statutory, including, without limitation, warranties that the * * Covered Software is free of defects, merchantable, fit for a * * particular purpose or non-infringing. The entire risk as to the * * quality and performance of the Covered Software is with You. * * Should any Covered Software prove defective in any respect, You * * (not any Contributor) assume the cost of any necessary servicing, * * repair, or correction. This disclaimer of warranty constitutes an * * essential part of this License. No use of any Covered Software is * * authorized under this License except under this disclaimer. * * * ************************************************************************ ************************************************************************ * * * 7. Limitation of Liability * * -------------------------- * * * * Under no circumstances and under no legal theory, whether tort * * (including negligence), contract, or otherwise, shall any * * Contributor, or anyone who distributes Covered Software as * * permitted above, be liable to You for any direct, indirect, * * special, incidental, or consequential damages of any character * * including, without limitation, damages for lost profits, loss of * * goodwill, work stoppage, computer failure or malfunction, or any * * and all other commercial damages or losses, even if such party * * shall have been informed of the possibility of such damages. This * * limitation of liability shall not apply to liability for death or * * personal injury resulting from such party's negligence to the * * extent applicable law prohibits such limitation. Some * * jurisdictions do not allow the exclusion or limitation of * * incidental or consequential damages, so this exclusion and * * limitation may not apply to You. * * * ************************************************************************ 8. Litigation ------------- Any litigation relating to this License may be brought only in the courts of a jurisdiction where the defendant maintains its principal place of business and such litigation shall be governed by laws of that jurisdiction, without reference to its conflict-of-law provisions. Nothing in this Section shall prevent a party's ability to bring cross-claims or counter-claims. 9. Miscellaneous ---------------- This License represents the complete agreement concerning the subject matter hereof. If any provision of this License is held to be unenforceable, such provision shall be reformed only to the extent necessary to make it enforceable. Any law or regulation which provides that the language of a contract shall be construed against the drafter shall not be used to construe this License against a Contributor. 10. Versions of the License --------------------------- 10.1. New Versions Mozilla Foundation is the license steward. Except as provided in Section 10.3, no one other than the license steward has the right to modify or publish new versions of this License. Each version will be given a distinguishing version number. 10.2. Effect of New Versions You may distribute the Covered Software under the terms of the version of the License under which You originally received the Covered Software, or under the terms of any subsequent version published by the license steward. 10.3. Modified Versions If you create software not governed by this License, and you want to create a new license for such software, you may create and use a modified version of this License if you rename the license and remove any references to the name of the license steward (except to note that such modified license differs from this License). 10.4. Distributing Source Code Form that is Incompatible With Secondary Licenses If You choose to distribute Source Code Form that is Incompatible With Secondary Licenses under the terms of this version of the License, the notice described in Exhibit B of this License must be attached. Exhibit A - Source Code Form License Notice ------------------------------------------- This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/. If it is not possible or desirable to put the notice in a particular file, then You may include the notice in a location (such as a LICENSE file in a relevant directory) where a recipient would be likely to look for such a notice. You may add additional accurate notices of copyright ownership. Exhibit B - "Incompatible With Secondary Licenses" Notice --------------------------------------------------------- This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0. ================================================ FILE: package.json ================================================ { "name": "mongo-es", "version": "3.4.4", "description": "A MongoDB to Elasticsearch connector", "keywords": [ "mongodb", "elasticsearch", "connector", "etl" ], "main": "dist/src/index.js", "types": "dist/src/index.d.ts", "typings": "dist/src/index.d.ts", "scripts": { "start": "node dist/src/main.js", "compile": "tsc", "build": "npm run clean && npm run compile", "dev": "npm run clean && tsc -w & NODE_ENV=dev nodemon dist/src/main.js", "test": "npm run compile && ava dist/test/*.test.js", "clean": "rm -rf dist", "purge": "rm -rf package-lock.json node_modules && npm run clean", "format": "prettier --config .prettierrc --write '**/*'", "prepublishOnly": "npm run build" }, "bin": { "mongo-es": "dist/src/main.js" }, "repository": { "type": "git", "url": "git+https://github.com/jike-engineering/mongo-es.git" }, "author": "", "license": "MPL-2.0", "bugs": { "url": "https://github.com/jike-engineering/mongo-es/issues" }, "homepage": "https://github.com/jike-engineering/mongo-es#readme", "dependencies": { "elasticsearch": "16.7.1", "lodash": "4.17.21", "mongodb": "3.6.0", "rx": "4.1.0" }, "devDependencies": { "@types/elasticsearch": "5.0.36", "@types/lodash": "4.14.159", "@types/mongodb": "3.5.26", "@types/rx": "4.1.2", "ava": "3.11.1", "husky": "4.2.5", "nodemon": "2.0.4", "prettier": "2.0.5", "pretty-quick": "2.0.1", "source-map-support": "0.5.19", "typescript": "3.9.7" }, "husky": { "hooks": { "pre-commit": "pretty-quick --staged" } } } ================================================ FILE: src/config.ts ================================================ import { ObjectID, MongoClientOptions } from 'mongodb' import { ConfigOptions, IndicesCreateParams, IndicesPutMappingParams } from 'elasticsearch' export class MongoConfig { url: string options?: MongoClientOptions constructor({ url, options = {} }) { this.url = url this.options = options } } export class ElasticsearchConfig { options: ConfigOptions indices: IndicesCreateParams[] constructor({ options, indices = [] }) { this.options = options this.indices = indices } } export class CheckPoint { phase: 'scan' | 'tail' id: ObjectID time: Date constructor({ phase, id = '000000000000000000000000', time = Date.now() }) { this.phase = phase if (phase === 'scan') { this.id = new ObjectID(id) } this.time = new Date(time) } } export type ExtractTask = { db: string collection: string projection: { [key: string]: 1 | 0 } } export type TransformTask = { parent?: string mapping: { [key: string]: string } static?: { [key: string]: string } } export type LoadTask = IndicesPutMappingParams export class Task { from: CheckPoint extract: ExtractTask transform: TransformTask load: LoadTask static onSaveCallback: (name: string, checkPoint: CheckPoint) => Promise static onLoadCallback: (name: string) => Promise constructor({ from, extract, transform, load }) { this.from = new CheckPoint(from) this.extract = extract this.transform = transform this.load = load } name(): string { return `${this.extract.db}.${this.extract.collection}___${this.load.index}.${this.load.type}` } async endScan(): Promise { this.from.phase = 'tail' delete this.from.id await Task.saveCheckpoint(this.name(), this.from) } static onSaveCheckpoint(onSaveCallback: (name: string, checkPoint: CheckPoint) => Promise) { Task.onSaveCallback = onSaveCallback } static onLoadCheckpoint(onLoadCallback: (name: string) => Promise) { Task.onLoadCallback = onLoadCallback } static async saveCheckpoint(name: string, checkPoint: CheckPoint): Promise { if (Task.onSaveCallback && Task.onSaveCallback instanceof Function) { try { await Task.onSaveCallback(name, checkPoint) } catch (err) { console.error('on save checkpoint', name, checkPoint, err) } } } static async loadCheckpoint(name: string): Promise { try { if (Task.onLoadCallback && Task.onLoadCallback instanceof Function) { const obj = await Task.onLoadCallback(name) if (obj && obj.phase) { return new CheckPoint(obj) } } return null } catch (err) { console.error('on load checkpoint', name, err) return null } } } export class Controls { mongodbReadCapacity: number elasticsearchBulkInterval: number elasticsearchBulkSize: number indexNameSuffix: string constructor({ mongodbReadCapacity = Infinity, elasticsearchBulkInterval = 5000, elasticsearchBulkSize = 5000, indexNameSuffix = '', }) { this.mongodbReadCapacity = mongodbReadCapacity this.elasticsearchBulkInterval = elasticsearchBulkInterval this.elasticsearchBulkSize = elasticsearchBulkSize this.indexNameSuffix = indexNameSuffix } } export class Config { mongodb: MongoConfig elasticsearch: ElasticsearchConfig tasks: Task[] controls: Controls constructor(str: string) { const { mongodb, elasticsearch, tasks, controls } = JSON.parse(str) this.mongodb = new MongoConfig(mongodb) this.elasticsearch = new ElasticsearchConfig(elasticsearch) this.tasks = tasks.map((task) => new Task(task)) this.controls = new Controls(controls) } } ================================================ FILE: src/elasticsearch.ts ================================================ import { Client, BulkIndexDocumentsParams } from 'elasticsearch' import * as _ from 'lodash' import { ESDoc } from './types' import { ElasticsearchConfig, Task } from './config' export default class Elasticsearch { static client: Client task: Task searchBuffer: { [id: string]: ((doc: ESDoc | null) => void)[] } = {} searchRunning: boolean = false retrieveBuffer: { [id: string]: ((doc: ESDoc | null) => void)[] } = {} retrieveRunning: boolean = false constructor(elasticsearch: ElasticsearchConfig, task: Task) { if (!Elasticsearch.client) { Elasticsearch.client = new Client({ ...elasticsearch.options }) } this.task = task } async bulk(params: BulkIndexDocumentsParams): Promise { return new Promise((resolve, reject) => { Elasticsearch.client.bulk(params, (err, response) => { err ? reject(err) : resolve(response) }) }) } async search(id: string): Promise { return new Promise((resolve) => { this.searchBuffer[id] = this.searchBuffer[id] || [] this.searchBuffer[id].push(resolve) if (!this.searchRunning) { this.searchRunning = true setTimeout(this._search.bind(this), 1000) } }) } async _search(): Promise { const ids = _.take(_.keys(this.searchBuffer), 1024) if (ids.length === 0) { this.searchRunning = false return } const docs = await this._searchBatchSafe(ids) ids.forEach((id) => { const cbs = this.searchBuffer[id] delete this.searchBuffer[id] cbs.forEach((cb) => { cb(docs[id] || null) }) }) setTimeout(this._search.bind(this), 1000) } async _searchBatchSafe(ids: string[]): Promise<{ [id: string]: ESDoc }> { return new Promise<{ [id: string]: ESDoc }>((resolve) => { Elasticsearch.client.search( { index: this.task.load.index, type: this.task.load.type, body: { query: { terms: { _id: ids, }, }, }, }, (err, response) => { try { if (err) { console.warn('search from elasticsearch', this.task.name(), ids, err.message) resolve({}) return } console.debug('search from elasticsearch', response) const docs: ESDoc[] = response.hits.hits.map(this._mapResponse.bind(this)) resolve(_.keyBy(docs, (doc) => doc._id)) } catch (err2) { console.error('search from elasticsearch', this.task.name(), ids, err2) resolve({}) } }, ) }) } async retrieve(id: string): Promise { return new Promise((resolve) => { this.retrieveBuffer[id] = this.retrieveBuffer[id] || [] this.retrieveBuffer[id].push(resolve) if (!this.retrieveRunning) { this.retrieveRunning = true setTimeout(this._retrieve.bind(this), 1000) } }) } async _retrieve(): Promise { const ids = _.take(_.keys(this.retrieveBuffer), 1024) if (ids.length === 0) { this.retrieveRunning = false return } const docs = await this._retrieveBatchSafe(ids) ids.forEach((id) => { const cbs = this.retrieveBuffer[id] delete this.retrieveBuffer[id] cbs.forEach((cb) => { cb(docs[id] || null) }) }) setTimeout(this._retrieve.bind(this), 1000) } async _retrieveBatchSafe(ids: string[]): Promise<{ [id: string]: ESDoc }> { return new Promise<{ [id: string]: ESDoc }>((resolve) => { Elasticsearch.client.mget( { index: this.task.load.index as string, type: this.task.load.type, body: { ids, }, }, (err, response) => { try { if (err || !response.docs) { console.warn('retrieve from elasticsearch', this.task.name(), ids, err.message) resolve({}) return } console.debug('retrieve from elasticsearch', response) const docs: ESDoc[] = response.docs .filter((doc) => doc.found) .map(this._mapResponse.bind(this)) resolve(_.keyBy(docs, (doc) => doc._id)) } catch (err2) { console.error('retrieve from elasticsearch', this.task.name(), ids, err2) resolve({}) } }, ) }) } _mapResponse(hit: { _id: string; _parent?: string; _source: ESDoc }): ESDoc { const doc = hit._source || {} doc._id = hit._id if (this.task.transform.parent && hit._parent) { _.set(doc, this.task.transform.parent, hit._parent) } return doc } } ================================================ FILE: src/index.ts ================================================ import MongoDB from './mongodb' import Elasticsearch from './elasticsearch' import Indices from './indices' import Processor from './processor' import { Config, Task } from './config' export async function run(config: Config): Promise { console.log('run', new Date()) // check and create indices, mappings await Indices.init(config) // load checkpoint for (let task of config.tasks) { const checkpoint = await Task.loadCheckpoint(task.name()) if (checkpoint) { task.from = checkpoint } console.log('from checkpoint', task.name(), task.from) } // run tasks for (let task of config.tasks) { const mongodb = await MongoDB.init(config.mongodb, task) const elasticsearch = new Elasticsearch(config.elasticsearch, task) const processor = new Processor(task, config.controls, mongodb, elasticsearch) if (task.from.phase === 'scan') { console.log('scan', task.name(), 'from', task.from.id) await processor.scanDocument() await task.endScan() console.log('scan', task.name(), 'end') } console.log('tail', task.name(), 'from', task.from.time) processor.tailOpLog().catch((err) => { console.error('tailOpLog', err) process.exit(0) }) } } console.debug = process.env.NODE_ENV === 'dev' ? console.log : () => null export { Config, Task } ================================================ FILE: src/indices.ts ================================================ import { Client, IndicesCreateParams, IndicesPutMappingParams, IndicesExistsParams, } from 'elasticsearch' import { Config, ElasticsearchConfig } from './config' export default class Indices { static client: Client private constructor(elasticsearch: ElasticsearchConfig) { if (!Indices.client) { Indices.client = new Client({ ...elasticsearch.options }) } } static async init(config: Config): Promise { const indices = new Indices(config.elasticsearch) for (let index of config.elasticsearch.indices) { index.index += config.controls.indexNameSuffix if (!(await indices.exists(index))) { await indices.create(index) console.log('create index', index.index) } } for (let task of config.tasks) { task.load.index += config.controls.indexNameSuffix await indices.putMapping(task.load) console.log('put mapping', task.load.index, task.load.type) } } async create(params: IndicesCreateParams): Promise { return new Promise((resolve, reject) => { Indices.client.indices.create(params, (err, response) => { err ? reject(err) : resolve(response) }) }) } async putMapping(params: IndicesPutMappingParams): Promise { return new Promise((resolve, reject) => { Indices.client.indices.putMapping(params, (err, response) => { err ? reject(err) : resolve(response) }) }) } async exists(params: IndicesExistsParams): Promise { return new Promise((resolve, reject) => { Indices.client.indices.exists(params, (err, response) => { err ? reject(err) : resolve(response) }) }) } } ================================================ FILE: src/main.ts ================================================ #!/usr/bin/env node import { readFile } from 'fs' import { resolve as resolvePath } from 'path' import { Config } from './config' import { run } from './index' async function readConfig(path: string): Promise { return new Promise((resolve, reject) => { readFile(resolvePath(path), 'utf8', (err, str) => { err ? reject(err) : resolve(new Config(str)) }) }) } readConfig(process.argv[2]) .then(run) .catch((err) => { console.error('run', err) }) ================================================ FILE: src/mongodb.ts ================================================ import { Readable } from 'stream' import * as _ from 'lodash' import { Timestamp, Cursor, MongoClient, ObjectID, Collection } from 'mongodb' import { MongoDoc } from './types' import { Task, MongoConfig } from './config' export default class MongoDB { static oplog: Collection collection: Collection task: Task retrieveBuffer: { [id: string]: ((doc: MongoDoc | null) => void)[] } = {} retrieveRunning: boolean = false private constructor(collection: Collection, task: Task) { this.collection = collection this.task = task } static async init(mongodb: MongoConfig, task: Task): Promise { const collection = (await MongoClient.connect(mongodb.url, mongodb.options)) .db(task.extract.db) .collection(task.extract.collection) if (!MongoDB.oplog) { MongoDB.oplog = (await MongoClient.connect(mongodb.url, mongodb.options)) .db('local') .collection('oplog.rs') } return new MongoDB(collection, task) } getCollection(): Readable { return this.collection .find({ _id: { $gte: this.task.from.id, }, }) .project(this.task.extract.projection) .stream() } getOplog(): Cursor { return MongoDB.oplog .find({ ns: `${this.task.extract.db}.${this.task.extract.collection}`, ts: { $gte: new Timestamp(0, this.task.from.time.getTime() / 1000), }, fromMigrate: { $ne: true, }, }) .addCursorFlag('tailable', true) .addCursorFlag('oplogReplay', true) .addCursorFlag('noCursorTimeout', true) .addCursorFlag('awaitData', true) } async retrieve(id: ObjectID): Promise { return new Promise((resolve) => { this.retrieveBuffer[id.toHexString()] = this.retrieveBuffer[id.toHexString()] || [] this.retrieveBuffer[id.toHexString()].push(resolve) if (!this.retrieveRunning) { this.retrieveRunning = true setTimeout(this._retrieve.bind(this), 1000) } }) } async _retrieve(): Promise { const ids = _.take(_.keys(this.retrieveBuffer), 1024) if (ids.length === 0) { this.retrieveRunning = false return } const docs = await this._retrieveBatchSafe(ids) ids.forEach((id) => { const cbs = this.retrieveBuffer[id] delete this.retrieveBuffer[id] cbs.forEach((cb) => { cb(docs[id] || null) }) }) setTimeout(this._retrieve.bind(this), 1000) } async _retrieveBatchSafe(ids: string[]): Promise<{ [id: string]: MongoDoc }> { try { const docs = await this.collection .find({ _id: { $in: ids.map(ObjectID.createFromHexString), }, }) .toArray() console.debug('retrieve from mongodb', docs) return _.keyBy(docs, (doc) => doc._id.toHexString()) } catch (err) { console.warn('retrieve from mongodb', this.task.name(), ids, err) return {} } } } ================================================ FILE: src/processor.ts ================================================ import { Readable } from 'stream' import { Observable } from 'rx' import * as _ from 'lodash' import { Timestamp } from 'mongodb' import { Task, Controls, CheckPoint } from './config' import { IR, MongoDoc, ESDoc, OpLog } from './types' import Elasticsearch from './elasticsearch' import MongoDB from './mongodb' export default class Processor { static provisionedReadCapacity: number static consumedReadCapacity: number task: Task controls: Controls mongodb: MongoDB elasticsearch: Elasticsearch queue: OpLog[][] = [] running: boolean = false constructor(task: Task, controls: Controls, mongodb: MongoDB, elasticsearch: Elasticsearch) { this.task = task this.controls = controls this.mongodb = mongodb this.elasticsearch = elasticsearch Processor.provisionedReadCapacity = controls.mongodbReadCapacity Processor.consumedReadCapacity = 0 } static controlReadCapacity(stream: Readable): Readable { if (!Processor.provisionedReadCapacity) { return stream } const interval = setInterval(() => { Processor.consumedReadCapacity = 0 stream.resume() }, 1000) stream.addListener('data', () => { Processor.consumedReadCapacity++ if (Processor.consumedReadCapacity >= Processor.provisionedReadCapacity) { stream.pause() } }) stream.addListener('end', () => { clearInterval(interval) }) return stream } transformer( action: 'upsert' | 'delete', doc: MongoDoc | ESDoc, timestamp?: Timestamp, isESDoc: boolean = false, ): IR | null { if (action === 'delete') { return { action: 'delete', id: doc._id.toString(), parent: this.task.transform.parent && _.get(doc, this.task.transform.parent), timestamp: timestamp ? timestamp.getHighBits() : 0, } } const data = _.reduce( this.task.transform.mapping, (obj, value, key) => { if (isESDoc) { key = value } if (_.has(doc, key)) { _.set(obj, value, _.get(doc, key)) } return obj }, { ...this.task.transform.static } || {}, ) if (_.isEmpty(data)) { return null } return { action: 'upsert', id: doc._id.toString(), data, parent: this.task.transform.parent && _.get(doc, this.task.transform.parent), timestamp: timestamp ? timestamp.getHighBits() : 0, } } applyUpdateMongoDoc( doc: MongoDoc, set: { [key: string]: any } = {}, unset: { [key: string]: any } = {}, ): MongoDoc { _.forEach(this.task.transform.mapping, (ignored, key) => { if (_.get(unset, key)) { _.unset(doc, key) } if (_.has(set, key)) { _.set(doc, key, _.get(set, key)) } }) return doc } applyUpdateESDoc( doc: ESDoc, set: { [key: string]: any } = {}, unset: { [key: string]: any } = {}, ): ESDoc { _.forEach(this.task.transform.mapping, (value, key) => { if (_.get(unset, key)) { _.unset(doc, value) } if (_.has(set, key)) { _.set(doc, value, _.get(set, key)) } }) return doc } ignoreUpdate(oplog: OpLog): boolean { let ignore = true if (oplog.op === 'u') { _.forEach(this.task.transform.mapping, (value, key) => { ignore = ignore && !(_.has(oplog.o, key) || _.has(oplog.o.$set, key) || _.get(oplog.o.$unset, key)) }) } return ignore } scan(): Observable { return Observable.create((observer) => { try { const stream = Processor.controlReadCapacity(this.mongodb.getCollection()) stream.addListener('data', (doc: MongoDoc) => { observer.onNext(doc) }) stream.addListener('error', (err: Error) => { observer.onError(err) }) stream.addListener('end', () => { observer.onCompleted() }) } catch (err) { observer.onError(err) } }) } tail(): Observable { return Observable.create((observer) => { try { const cursor = this.mongodb.getOplog() cursor.forEach( (log: OpLog) => { observer.onNext(log) }, () => { observer.onCompleted() }, ) } catch (err) { observer.onError(err) } }) } async oplog(oplog: OpLog): Promise { try { switch (oplog.op) { case 'i': { return this.transformer('upsert', oplog.o, oplog.ts) } case 'u': { if (!oplog.o2._id) { console.warn('oplog', 'cannot transform', oplog) return null } if (this.ignoreUpdate(oplog)) { console.debug('ignoreUpdate', oplog) return null } if (_.keys(oplog.o).find((key) => !key.startsWith('$'))) { return this.transformer( 'upsert', { _id: oplog.o2._id, ...oplog.o, }, oplog.ts, ) } const old = this.task.transform.parent ? await this.elasticsearch.search(oplog.o2._id.toHexString()) : await this.elasticsearch.retrieve(oplog.o2._id.toHexString()) const doc = old ? this.applyUpdateESDoc(old, oplog.o.$set, oplog.o.$unset) : await this.mongodb.retrieve(oplog.o2._id) return doc ? this.transformer('upsert', doc, oplog.ts, !!old) : null } case 'd': { if (_.size(oplog.o) !== 1 || !oplog.o._id) { console.warn('oplog', 'cannot transform', oplog) return null } const doc = this.task.transform.parent ? await this.elasticsearch.search(oplog.o._id.toHexString()) : oplog.o console.debug(doc) return doc ? this.transformer('delete', doc, oplog.ts) : null } default: { return null } } } catch (err) { console.error('oplog', err) return null } } async load(irs: IR[]): Promise { if (irs.length === 0) { return } const body: any[] = [] irs.forEach((ir) => { switch (ir.action) { case 'upsert': { body.push({ index: { _index: this.task.load.index, _type: this.task.load.type, _id: ir.id, _parent: ir.parent, }, }) body.push(ir.data) break } case 'delete': { body.push({ delete: { _index: this.task.load.index, _type: this.task.load.type, _id: ir.id, _parent: ir.parent, }, }) break } } }) return await this.elasticsearch.bulk({ body }) } mergeOplogs(oplogs: OpLog[]): OpLog[] { const store: { [key: string]: OpLog } = {} for (let oplog of _.sortBy(oplogs, 'ts')) { switch (oplog.op) { case 'i': { store[oplog.ns + oplog.o._id.toString()] = oplog break } case 'u': { const key = oplog.ns + oplog.o2._id.toString() const log = store[key] if (log && log.op === 'i') { log.o = this.applyUpdateMongoDoc(log.o, oplog.o.$set, oplog.o.$unset) log.ts = oplog.ts } else if (log && log.op === 'u') { log.o = _.merge(log.o, oplog.o) log.ts = oplog.ts } else { store[key] = oplog } break } case 'd': { const key = oplog.ns + oplog.o._id.toString() if (store[key] && store[key].op === 'i') { delete store[key] } else { store[key] = oplog } break } } } return _.sortBy( _.map(store, (oplog) => oplog), 'ts', ) } async scanDocument(): Promise { return new Promise((resolve, reject) => { this.scan() .bufferWithTimeOrCount( this.controls.elasticsearchBulkInterval, this.controls.elasticsearchBulkSize, ) .map((docs) => _.compact(_.map(docs, (doc) => this.transformer('upsert', doc)))) .subscribe( async (irs) => { if (irs.length === 0) { return } try { await this.load(irs) await Task.saveCheckpoint( this.task.name(), new CheckPoint({ phase: 'scan', id: irs[0].id, }), ) console.log('scan', this.task.name(), irs.length, irs[0].id) } catch (err) { console.warn('scan', this.task.name(), err.message) } }, reject, resolve, ) }) } async tailOpLog(): Promise { return new Promise((resolve, reject) => { this.tail() .bufferWithTimeOrCount( this.controls.elasticsearchBulkInterval, this.controls.elasticsearchBulkSize, ) .subscribe( (oplogs) => { this.queue.push(oplogs) if (!this.running) { this.running = true setImmediate(this._processOplog.bind(this)) } }, (err) => { console.error('tail', this.task.name(), err) reject(err) }, () => { const err = new Error('should not complete') console.error('tail', this.task.name(), err) reject(err) }, ) }) } async _processOplog() { if (this.queue.length === 0) { this.running = false return } while (this.queue.length > 0) { const oplogs = _.flatten(this.queue) this.queue = [] await this._processOplogSafe(oplogs) } setImmediate(this._processOplog.bind(this)) } async _processOplogSafe(oplogs) { try { const irs = _.compact( await Promise.all( this.mergeOplogs(oplogs).map(async (oplog) => { return await this.oplog(oplog) }), ), ) if (irs.length > 0) { await this.load(irs) await Task.saveCheckpoint( this.task.name(), new CheckPoint({ phase: 'tail', time: Date.now() - 1000 * 10, }), ) console.log('tail', this.task.name(), irs.length, new Date(irs[0].timestamp * 1000)) } } catch (err) { console.warn('tail', this.task.name(), err.message) } } } ================================================ FILE: src/types.ts ================================================ import { Timestamp, ObjectID } from 'mongodb' export type MongoDoc = { _id: ObjectID [key: string]: any } export type ESDoc = { _id: string [key: string]: any } export type OplogInsert = { op: 'i' o: { _id: ObjectID [key: string]: any } } export type OplogUpdate = { op: 'u' o: { $set?: { [key: string]: any } $unset?: { [key: string]: any } [key: string]: any } o2: { _id: ObjectID } } export type OplogDelete = { op: 'd' o: { _id: ObjectID } } export type OpLog = { ts: Timestamp ns: string fromMigrate?: boolean } & (OplogInsert | OplogUpdate | OplogDelete) export type IRUpsert = { action: 'upsert' id: string parent?: string data: { [key: string]: any } timestamp: number } export type IRDelete = { action: 'delete' id: string parent?: string timestamp: number } export type IR = IRUpsert | IRDelete ================================================ FILE: test/_init.ts ================================================ import 'source-map-support/register' ================================================ FILE: test/elasticsearch.test.ts ================================================ import test from 'ava' import { Client } from 'elasticsearch' import Processor from '../src/processor' import Elasticsearch from '../src/elasticsearch' import { Controls, Task } from '../src/config' const client = new Client({ host: 'localhost:9200', }) const task: Task = new Task({ from: { phase: 'scan', }, extract: {}, transform: { mapping: { 'field0.field1': 'field1', 'field0.field2': 'field2', }, }, load: { index: 'test', type: 'test', }, }) test('load', async (t) => { const elasticsearch = new Elasticsearch( { options: { host: 'localhost:9200', }, indices: [], }, task, ) const processor = new Processor(task, new Controls({}), null as any, elasticsearch) await processor.load([ { action: 'upsert', id: 'aaaaaaaaaaaaaaaaaaaaaaaa', data: { field1: 1, field2: 2, }, parent: undefined, timestamp: 0, }, ]) const data = await client.get({ index: 'test', type: 'test', id: 'aaaaaaaaaaaaaaaaaaaaaaaa', }) t.deepEqual(data, { _index: 'test', _type: 'test', _id: 'aaaaaaaaaaaaaaaaaaaaaaaa', _version: 1, found: true, _source: { field1: 1, field2: 2, }, }) }) test.before('create index', (t) => { return client.indices.create({ index: 'test', }) }) test.after.always('delete index', (t) => { return client.indices.delete({ index: 'test', }) }) ================================================ FILE: test/processor.test.ts ================================================ import test from 'ava' import { ObjectID, Timestamp } from 'mongodb' import { OpLog, MongoDoc, IR, ESDoc } from '../src/types' import { Controls, Task } from '../src/config' import Processor from '../src/processor' const oplog: OpLog = { ts: new Timestamp(14, 1495012567), op: 'u', ns: 'db0.collection0', o2: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, o: { $set: { 'field0.field1': 'set nested field', }, $unset: { 'field0.field2': 1, }, }, } const task: Task = new Task({ from: { phase: 'scan', }, extract: {}, transform: { mapping: { 'field0.field1': 'field1', 'field0.field2': 'field2', }, }, load: {}, }) const task2: Task = new Task({ from: { phase: 'scan', }, extract: {}, transform: { mapping: { 'field0.field3': 'field3', }, }, load: {}, }) const mongoDoc: MongoDoc = { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), field0: { field1: 1, field2: 2, }, } const esDoc: ESDoc = { _id: 'aaaaaaaaaaaaaaaaaaaaaaaa', field1: 1, field2: 2, } test('transformer create', (t) => { const processor = new Processor(task, new Controls({}), null as any, null as any) t.deepEqual(processor.transformer('upsert', mongoDoc), { action: 'upsert', id: 'aaaaaaaaaaaaaaaaaaaaaaaa', data: { field1: 1, field2: 2, }, parent: undefined, timestamp: 0, }) }) test('transformer update', (t) => { const processor = new Processor(task, new Controls({}), null as any, null as any) t.deepEqual(processor.transformer('upsert', mongoDoc), { action: 'upsert', id: 'aaaaaaaaaaaaaaaaaaaaaaaa', data: { field1: 1, field2: 2, }, parent: undefined, timestamp: 0, }) }) test('transformer delete', (t) => { const processor = new Processor(task, new Controls({}), null as any, null as any) t.deepEqual(processor.transformer('delete', mongoDoc), { action: 'delete', id: 'aaaaaaaaaaaaaaaaaaaaaaaa', parent: undefined, timestamp: 0, }) }) test('applyUpdateMongoDoc', (t) => { const transform = new Processor(task, new Controls({}), null as any, null as any) t.deepEqual(transform.applyUpdateMongoDoc(mongoDoc, oplog.o.$set, oplog.o.$unset), { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), field0: { field1: 'set nested field', }, }) }) test('applyUpdateESDoc', (t) => { const transform = new Processor(task, new Controls({}), null as any, null as any) t.deepEqual(transform.applyUpdateESDoc(esDoc, oplog.o.$set, oplog.o.$unset), { _id: 'aaaaaaaaaaaaaaaaaaaaaaaa', field1: 'set nested field', }) }) test('ignoreUpdate true', (t) => { const processor = new Processor(task2, new Controls({}), null as any, null as any) t.is(processor.ignoreUpdate(oplog), true) }) test('ignoreUpdate false', (t) => { const processor = new Processor(task, new Controls({}), null as any, null as any) t.is(processor.ignoreUpdate(oplog), false) }) test('mergeOplogs insert then update', (t) => { const processor = new Processor( { transform: { mapping: { 'field0.field1': 'field1', 'field0.field2': 'field2', }, }, } as any, new Controls({}), null as any, null as any, ) const oplogs = processor.mergeOplogs([ { ts: new Timestamp(0, 0), op: 'i', ns: 'example1', o: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), 'field0.field1': 0, }, }, { ts: new Timestamp(0, 1), op: 'u', ns: 'example1', o: { $set: { 'field0.field1': 1, }, $unset: { 'field0.field2': 1, }, }, o2: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, ]) t.deepEqual(oplogs, [ { ts: new Timestamp(0, 1), op: 'i', ns: 'example1', o: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), 'field0.field1': 1, }, }, ]) }) test('mergeOplogs update then update', (t) => { const processor = new Processor( { transform: { mapping: { 'field0.field1': 'field1', 'field0.field2': 'field2', }, }, } as any, new Controls({}), null as any, null as any, ) const oplogs = processor.mergeOplogs([ { ts: new Timestamp(0, 1), op: 'u', ns: 'example1', o: { 'field0.field1': 1, $set: { 'field0.field2': 1, }, }, o2: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, { ts: new Timestamp(0, 0), op: 'u', ns: 'example1', o: { $set: { 'field0.field1': 3, 'field0.field2': 2, }, }, o2: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, ]) t.deepEqual(oplogs, [ { ts: new Timestamp(0, 1), op: 'u', ns: 'example1', o: { 'field0.field1': 1, $set: { 'field0.field1': 3, 'field0.field2': 1, }, }, o2: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, ]) }) test('mergeOplogs update then delete', (t) => { const processor = new Processor( { transform: { mapping: { 'field0.field1': 'field1', 'field0.field2': 'field2', }, }, } as any, new Controls({}), null as any, null as any, ) const oplogs = processor.mergeOplogs([ { ts: new Timestamp(0, 0), op: 'u', ns: 'example1', o: { 'field0.field1': 1, $set: { 'field0.field2': 1, }, }, o2: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, { ts: new Timestamp(0, 1), op: 'd', ns: 'example1', o: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, ]) t.deepEqual(oplogs, [ { ts: new Timestamp(0, 1), op: 'd', ns: 'example1', o: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, ]) }) test('mergeOplogs insert then delete', (t) => { const processor = new Processor( { transform: { mapping: { 'field0.field1': 'field1', 'field0.field2': 'field2', }, }, } as any, new Controls({}), null as any, null as any, ) const oplogs = processor.mergeOplogs([ { ts: new Timestamp(0, 0), op: 'i', ns: 'example1', o: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), field0: 1, }, }, { ts: new Timestamp(0, 1), op: 'd', ns: 'example1', o: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, ]) t.deepEqual(oplogs, []) }) test('mergeOplogs insert then update then update', (t) => { const processor = new Processor( { transform: { mapping: { 'field0.field1': 'field1', }, }, } as any, new Controls({}), null as any, null as any, ) const oplogs = processor.mergeOplogs([ { ts: new Timestamp(0, 0), op: 'i', ns: 'example1', o: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), 'field0.field1': 0, }, }, { ts: new Timestamp(0, 2), op: 'u', ns: 'example1', o: { $set: { 'field0.field1': 2, }, }, o2: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, { ts: new Timestamp(0, 1), op: 'u', ns: 'example1', o: { $set: { 'field0.field1': 1, }, }, o2: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), }, }, ]) t.deepEqual(oplogs, [ { ts: new Timestamp(0, 2), op: 'i', ns: 'example1', o: { _id: new ObjectID('aaaaaaaaaaaaaaaaaaaaaaaa'), 'field0.field1': 2, }, }, ]) }) ================================================ FILE: tsconfig.json ================================================ { "compileOnSave": true, "compilerOptions": { "outDir": "dist", "rootDir": "./", "module": "commonjs", "sourceMap": true, "declaration": true, "target": "es6", "strictNullChecks": true, "typeRoots": ["node_modules/@types"] }, "exclude": ["dist", "node_modules"] }