MongoDB.local Atlanta: MongoDB Mobile: Bringing the Power of MongoDB to Your Device
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This presentation introduces MongoDB Mobile, which brings the power of MongoDB to mobile devices. It provides a complete data platform for mobile applications, including MongoDB Atlas for geographically distributed backend services, MongoDB Stitch as a serverless platform, and MongoDB Mobile for building apps on iOS and Android. MongoDB Mobile includes drivers, a lightweight embedded database, and a storage engine built on SQLite for local data storage and synchronization with Stitch.
![The Full Stack
Mobile 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)
…
* Complete example](https://image.slidesharecdn.com/130pmarcticatl-190612034824/85/MongoDB-local-Atlanta-MongoDB-Mobile-Bringing-the-Power-of-MongoDB-to-Your-Device-12-320.jpg)
![Stitch Mobile Sync
Example Usage
Stitch Syncs data when online on a per operation basis
Uses 3 client-side event responders
• ChangeListener
• ConflictHandler
• ErrorListener
Handlers receive all local/remote changes
// On changes to the remote document the trip_change
handler is called
function trip_change(changeEvent){
...
if(updatedFields.keys().includes(“Gate”)){
setStatusBarUpdate(“Gate Changed”, tripID,
gate);
}
...
}
// On a conflict, the trip_conflict handler is called
function trip_conflict(localDoc, remoteDoc){
newStatus = remoteDoc;
for(key in remoteDoc.keys()){
if(localDoc[key] != remoteDoc[key] &&
isLocalPreferred(key)){
newStatus[key] = localDoc[key]
}
}
// Returning a document from the handler will
attempt to write it
return newStatus;
};](https://image.slidesharecdn.com/130pmarcticatl-190612034824/85/MongoDB-local-Atlanta-MongoDB-Mobile-Bringing-the-Power-of-MongoDB-to-Your-Device-17-320.jpg)
MongoDB.local Atlanta: MongoDB Mobile: Bringing the Power of MongoDB to Your Device
- 1. MongoDB Mobile Bringing the Power of MongoDB to Your Device
- 2. This presentation contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward-looking statements are subject to a number of risks, uncertainties, assumptions and other factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those identified our filings with the Securities and Exchange Commission. You should not rely upon forward-looking statements as predictions of future events. Furthermore, such forward-looking statements speak only as of the date of this presentation. In particular, the development, release, and timing of any features or functionality described for MongoDB products remains at MongoDB’s sole discretion. This information is merely intended to outline our general product direction and it should not be relied on in making a purchasing decision nor is this a commitment, promise or legal obligation to deliver any material, code, or functionality. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements. Safe Harbor Statement
- 3. Matt Grogan Senior Solutions Architect Ben Ogden Senior Solutions Architect
- 4. We've Come a Long Way
- 5. 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 Mobile Is Transforming Everything
- 6. 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 (Beta) 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. Stitch The serverless platform from MongoDB Build better apps faster with MongoDB Stitch Services
- 9. Platform Details Operating System OS Details CPUs Devices iOS 11.0+ ARM64 x86_64 (simulators) Apple, Inc. tvOS 11.0+ ARM64 x86_64 (simulators) Apple, Inc. watchOS 4.2+ ARMv7k i386 (simulators) Apple, Inc. Android 5.0/Lollipop+ x86_64 armeabi-v7a arm64-v8a Any vendor (by ABI) Linux TBD x86_64 Any vendor macOS 10.10+ x86_64 Apple, Inc.
- 10. The Full Stack Your Mobile Application • iOS and Android devices • Leveraging the power of MongoDB everywhere • Allowing you to focus on building your GREAT THING MongoDB Stitch SDK • Access to MongoDB and Cloud services from Android and iOS • New Stitch interfaces for on-device (local) storage • Bi-directional synchronization between local and remote MongoDB Mobile Drivers • Swift for iOS, Java for Android • Existing drivers, extended to support local storage MongoDB Mobile Database • A lite version of MongoDB as a library • C language interface to the library • Fully passive, no background threads or tasks MongoDB Mobile Storage Engine • K/V storage on top of SQLite • Very small disk footprint and minimal memory usage • Energy efficient
- 11. The Full Stack 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 service invocation • API for syncing between local and remote • Provides a transparent bridge for applications iOS SDK: https://github.com/mongodb/stitch-ios-sdk/ Android SDK: https://github.com/mongodb/stitch-android-sdk/ final StitchAppClient client = Stitch.getDefaultAppClient(); final MongoClient mongoClient = client.getServiceClient(LocalMongoDbService.ClientFactory); MongoCollection<Document> items = mongoClient.getDatabase(TodoItem.TODO_LIST_DATABASE).getCollection(TodoItem.TODO_L IST_COLLECTION); 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; }
- 12. The Full Stack Mobile 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) … * Complete example
- 13. The Full Stack Mobile Database 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 • Drivers are extended to invoke it Availability • Builds out of MongoDB 4.0+ community tree • Pre-built binary packages for mobile targets lib = mongo_embedded_v1_lib_init (¶ms, status); instance = mongo_embedded_v1_instance_create (lib, params.yaml_config, status); client = mongoc_embedded_v1_client_create (instance); collection = mongoc_client_get_collection (client, "iot_test", "sensor_data"); insert = bson_new (); BSON_APPEND_UTF8 (insert, "message", "Hey there!"); BSON_APPEND_UTF8 (insert, "from", "Matt Lord); mongoc_collection_insert_one (collection, insert, NULL, NULL, &error); query = bson_new (); cursor = mongoc_collection_find_with_opts (collection, query, NULL, NULL); while (mongoc_cursor_next(cursor, &doc)) { str = bson_as_canonical_extended_json (doc, NULL); printf ("%sn", str); bson_free (str); } * Complete example
- 14. The Full Stack Mobile Storage Engine Leverages SQLite as a K/V store • Maintaining full MongoDB Query Language support • Single SQLite database called “mobile” • Table names follow the WiredTiger filesystem / dictionary naming convention • Every entity you create • database, collection, index, … Can be tested with standard MongoDB ./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
- 15. Mobile Sync
- 16. Stitch Mobile Sync Example Setup Steps for Sync 1. Define Sync + Conflict Handlers on a collection 2. Add Documents to be synced 3. Application manages local documents 4. Stitch then syncs state with the backend automatically • Bi-directional synchronization // Initialize your application, then configure Synced collections Stitch.initializeDefaultAppClient('<your- app-id>').then(() => { tripsColl.configureSync(trip_conflict, trip_change, trip_error); ... }); // Find all trips that should be synced and ensure they’re synced tripsColl.find({user: stitch.getUserId()}).toArray().then(trips =>{ tripsColl.syncMany(trips) }); ... tripsColl.sync().update({trip_id:currTripId},{meal_ch oice: selectedMeal}); ...
- 17. Stitch Mobile Sync Example Usage Stitch Syncs data when online on a per operation basis Uses 3 client-side event responders • ChangeListener • ConflictHandler • ErrorListener Handlers receive all local/remote changes // On changes to the remote document the trip_change handler is called function trip_change(changeEvent){ ... if(updatedFields.keys().includes(“Gate”)){ setStatusBarUpdate(“Gate Changed”, tripID, gate); } ... } // On a conflict, the trip_conflict handler is called function trip_conflict(localDoc, remoteDoc){ newStatus = remoteDoc; for(key in remoteDoc.keys()){ if(localDoc[key] != remoteDoc[key] && isLocalPreferred(key)){ newStatus[key] = localDoc[key] } } // Returning a document from the handler will attempt to write it return newStatus; };
- 18. Demo: What’s For Lunch? https://docs.mongodb.com/stitch/tutorials/todo-ios/
- 19. What’s Next
- 21. Thank You!