MongoDB Mobile: Bringing the Power of MongoDB to Your Device
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The document introduces MongoDB Mobile, emphasizing its role in transforming businesses by providing a complete data platform for mobile devices. It details the features of MongoDB's mobile SDK, including support for local storage, seamless synchronization, and the use of SQLite for an efficient mobile storage engine. Additionally, it outlines the various programming languages and drivers available for implementation, targeting Android and iOS applications.
![The Full Stack
MongoDB Drivers
● Existing drivers for the given language
○ With a few extensions
■ Open a local storage instance
■ Close a local storage instance
○ Support today for Swift, Java, and C
○ Others created based on demand
● Can be tested directly
○ Swift: https://github.com/mongodb/swift-mongo-
mobile/
○ Java:
http://central.maven.org/maven2/org/mongodb/mongodb-
driver-embedded/
import MongoMobile
…
let client = MongoMobile.create(settings: MongoClientSettings [ dbPath: "test-path" ])
let coll = try client.db("test").collection("foo")
let insertResult = try coll.insertOne([ "test": 42 ])
let findResult = try coll.find([ "_id": insertResult!.insertedId ])
let docs = Array(findResult)](https://image.slidesharecdn.com/mongodbmobilebringingthepowerofmongodbtoyourdevice-180702150557/85/MongoDB-Mobile-Bringing-the-Power-of-MongoDB-to-Your-Device-10-320.jpg)
![The Full Stack
MongoDB Embedded SDK
● Lite version of MongoDB formed into a library
○ C ABI
○ Auth, Replication, Sharding, etc. removed
○ Supports only the mobile storage engine
○ Passive: no background threads
○ Light: disk, memory, energy
● C Interface
○ Low level
○ Not designed to be used directly
○ Drivers should be extended to invoke it
● Availability
○ Builds out of MongoDB 4.0+ community tree
○ Pre-built binary packages for mobile targets
auto status = mongo_embedded_v1_status_create();
mongo_embedded_v1_init_params params;
...
auto lib = mongo_embedded_v1_lib_init(¶ms, status);
auto config_yaml = ...
auto instance = mongo_embedded_v1_instance_create(lib,
config_yaml, status);
auto client = mongo_embedded_v1_client_create(instance, status);
auto [inputMessage, inputMessageLen] = ...
auto [output, outputLen] = ...
int err = mongo_embedded_v1_client_invoke(client,
inputMessage, inputMessageLen,
&output, &outputLen,
status);](https://image.slidesharecdn.com/mongodbmobilebringingthepowerofmongodbtoyourdevice-180702150557/85/MongoDB-Mobile-Bringing-the-Power-of-MongoDB-to-Your-Device-11-320.jpg)
MongoDB Mobile: Bringing the Power of MongoDB to Your Device
- 1. MongoDB Mobile Bringing the Power of MongoDB to Your Device
- 2. Matt Lord Senior Product Manager @mattalord
- 3. We’ve Come a Long Way
- 4. Mobile Is Transforming Everything Mobile is becoming not only the new digital hub, but also the bridge to the physical world. That’s why mobile will affect more than just your digital operations — it will transform your entire business. Thomas Husson, Vice President and Principal Analyst at Forrester Research
- 5. A Complete Data Platform ● Geographically distributed backend services ○ MongoDB Atlas ■ Point and click active/active global clusters ■ Effortless HA, DR, and low-latency access ○ MongoDB Stitch, Serverless Platform ■ Automatic scaling based on request volume ■ Stitch Query Anywhere ■ Stitch Functions ■ Stitch Triggers ■ Stitch Mobile Sync (coming soon) ● Geographically distributed frontend services ○ MongoDB Mobile ■ IoT and edge devices ■ iOS and Android apps ■ Supporting local offline storage ● Stitch provides a seamless bridge between them
- 7. The Full Stack MongoDB Embedded SDK ● A lite version of MongoDB as a library ● C language interface to the library ● Fully passive, no background threads or tasks MongoDB Drivers ● Swift for iOS, Java for Android ● Existing drivers, extended to support local storage MongoDB Stitch SDK ● Access to MongoDB Stitch services from Android and iOS ● New Stitch Interfaces for on-device (local) storage ● Synchronization between local and remote Your Mobile Application ● iOS and Android devices ● Leveraging the power of MongoDB everywhere ● Allowing you to focus on building your GREAT THING MongoDB Mobile Storage Engine ● K/V storage on top of SQLite ● Very small disk footprint and minimal memory usage ● Energy efficient
- 8. Platform Details Operating System OS Details CPUs Devices iOS, tvOS 10.2+ ARM64 x86_64 (simulators) Apple, Inc. Android 5.0/Lollipop+ x86_64 armeabi-v7a arm64-v8a Any vendor (by ABI) Linux TBD x86_64 Any vendor macOS X 10.10+ x86_64 Apple, Inc.
- 9. The Full Stack MongoDB Stitch SDK ● Packages the entire mobile stack together ● Stitches the frontend and backend together ○ End-to-end Mobile SDK ○ API for local storage ○ API for remote Stitch invocation ○ API for syncing between local and remote ○ Provides a transparent bridge for applications ● iOS SDK: https://github.com/mongodb/stitch-ios-sdk/tree/v4- alpha ● Android SDK: https://github.com/mongodb/stitch-android- sdk/tree/v4-alpha final StitchAppClient client = Stitch.getDefaultAppClient(); final MongoClient mongoClient = client.getServiceClient(LocalMongoDbService.ClientFactory); MongoCollection<Document> items = mongoClient.getDatabase(TodoItem.TODO_LIST_DATABASE).getCollection(TodoItem.TODO_LIST_COLLECTIO N); public void updateChecked(final ObjectId itemId, final boolean isChecked) { final Document updateDoc = new Document("$set", new Document(TodoItem.CHECKED_KEY, isChecked)); if (isChecked) { updateDoc.append("$currentDate", new Document(TodoItem.DONE_DATE_KEY, true)); } else { updateDoc.append("$unset", new Document(TodoItem.DONE_DATE_KEY, "")); } items.updateOne(new Document(TodoItem.ID_KEY, itemId), updateDoc); ... } private List<TodoItem> getItems() { final ArrayList<TodoItem> todoItems = new ArrayList<>(); for (final Document doc : items.find()) { if (TodoItem.isTodoItem(doc)) { final TodoItem item = new TodoItem(doc); todoItems.add(item); } } return todoItems; }
- 10. The Full Stack MongoDB Drivers ● Existing drivers for the given language ○ With a few extensions ■ Open a local storage instance ■ Close a local storage instance ○ Support today for Swift, Java, and C ○ Others created based on demand ● Can be tested directly ○ Swift: https://github.com/mongodb/swift-mongo- mobile/ ○ Java: http://central.maven.org/maven2/org/mongodb/mongodb- driver-embedded/ import MongoMobile … let client = MongoMobile.create(settings: MongoClientSettings [ dbPath: "test-path" ]) let coll = try client.db("test").collection("foo") let insertResult = try coll.insertOne([ "test": 42 ]) let findResult = try coll.find([ "_id": insertResult!.insertedId ]) let docs = Array(findResult)
- 11. The Full Stack MongoDB Embedded SDK ● Lite version of MongoDB formed into a library ○ C ABI ○ Auth, Replication, Sharding, etc. removed ○ Supports only the mobile storage engine ○ Passive: no background threads ○ Light: disk, memory, energy ● C Interface ○ Low level ○ Not designed to be used directly ○ Drivers should be extended to invoke it ● Availability ○ Builds out of MongoDB 4.0+ community tree ○ Pre-built binary packages for mobile targets auto status = mongo_embedded_v1_status_create(); mongo_embedded_v1_init_params params; ... auto lib = mongo_embedded_v1_lib_init(¶ms, status); auto config_yaml = ... auto instance = mongo_embedded_v1_instance_create(lib, config_yaml, status); auto client = mongo_embedded_v1_client_create(instance, status); auto [inputMessage, inputMessageLen] = ... auto [output, outputLen] = ... int err = mongo_embedded_v1_client_invoke(client, inputMessage, inputMessageLen, &output, &outputLen, status);
- 12. The Full Stack Mobile Storage Engine ● Leverages SQLite as a K/V store ○ Single SQLite database called “mobile” ○ Table names follow the WiredTiger filesystem / dictionary naming convention ○ Every entity you create ■ database, collection, index, ... ■ Stored in a dedicated table as K/V pairs ● Can be tested with standard mongod ./buildscripts/scons.py mongod --mobile-se=on ./build/opt/mongo/mongod --storageEngine=mobile sqlite> .database main: /.../mobile.sqlite sqlite> .tables _mdb_catalog index-1-1419396644176400596 collection-0-1419396644176400596 index-1-9204882299253173129 collection-0-9204882299253173129 sqlite> select sql from sqlite_master where name='collection-0-9204882299253173129'; CREATE TABLE "collection-0-6881873531296038739"(rec_id INT, data BLOB, PRIMARY KEY(rec_id)) sqlite> select sql from sqlite_master where name='index-1-9204882299253173129'; CREATE TABLE "index-1-9204882299253173129"(key BLOB PRIMARY KEY, value BLOB) sqlite> select * from `collection-0-9204882299253173129`; rec_id data ---------- ---------- 1 2
- 13. Andrew Morrow Embedded SDK Lead Matt Broadstone Swift Driver Lead Kaitlin Mahar Swift Driver Engineer Ross Lawley Java Driver Lead Q&A with the Engineers Eric Daniels Stitch Lead
- 14. Visit us at the MongoDB Mobile/Stitch booth! Q&A with the Team