NoSQL database for Mobile Apps

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1. Mohit Sharma Developer Advocate,MongoDB @codeWithMohit NoSQL database for Mobile Apps WELCOME
2. Why NoSQL DB ? DB + NoSQL @codeWithMohit
3. How many brave souls here ? Ref: https://www.couchbase.com/blog/wp-content/uploads/2021/05/data-model-sql-to-json.png
4. How many lucky? @codeWithMohit
5. Response Json is update! @codeWithMohit
6. App developers @codeWithMohit
7. Repo ? Repo Cache Database Network
8. Evolution Repo Cache Database Network API 1 API 2 @codeWithMohit
9. Evolution Evilution Repo Cache Database Network API 3.1 API 3.2 API 2.1 API 2.2 API 1.1 API 1.2 API xx API xx API xx API xx API xx API xx API xx API xx
10. Occupational Hazard @codeWithMohit
11. Do more! @codeWithMohit
12. Possible future? @codeWithMohit
13. Introspect @codeWithMohit
14. Realm MongoDB @codeWithMohit
15. Realm Reactive Notifications Built-in Encryption Offline-First, Background Sync Object Schema & Relationships Simple to Learn & Master Idiomatic Query Language
16. Realm History • Free and Open Source Database • Founded 2011. First release in 2014 • C++ with Language SDK’s on top • Part of MongoDB since 2019 By MongoDB
17. Realm By MongoDB
18. Realm Object Classes are the Schema class Dog : RealmObject { var name: String = "" var age: Int = 0 } class Person : RealmObject { var name: String = "" var dog: Dog? = null var puppies: RealmList<Expert> = RealmList() } @codeWithMohit
19. Relationships class Person : RealmObject { var name: String = "" var dog: Dog? = null var puppies: RealmList<Expert> = RealmList() var tags: RealmMap<String, Object> = RealmMap() var activities: RealmSet<String> = RealmSet() } @codeWithMohit
20. Realm // Minimal configuration val config = RealmConfiguration.with(schema = setOf(Person::class, Dog::class)) // Extended Configuration val config2 = RealmConfiguration.Builder(schema = setOf(Person::class, Dog::class)) .name("my-realm.realm") .deleteRealmIfMigrationNeeded() .build() // Opening a Realm val realm = Realm.open(config) // Closing a Realm (not strictly needed) realm.close() @codeWithMohit
21. Realm // Minimal configuration val config = RealmConfiguration.with(schema = setOf(Person::class, Dog::class)) // Extended Configuration val config2 = RealmConfiguration.Builder(schema = setOf(Person::class, Dog::class)) .name("my-realm.realm") .deleteRealmIfMigrationNeeded() .build() // Opening a Realm val realm = Realm.open(config) // Closing a Realm (not strictly needed) realm.close() @codeWithMohit
22. Encryption & Schema Migration • Automatic Migration for basic use-case like Addition or deletion. • Single call API for encrypting complete database. @codeWithMohit
23. Realm // Minimal configuration val config = RealmConfiguration.with(schema = setOf(Person::class, Dog::class)) // Extended Configuration val config2 = RealmConfiguration.Builder(schema = setOf(Person::class, Dog::class)) .name("my-realm.realm") .deleteRealmIfMigrationNeeded() .build() // Opening a Realm val realm = Realm.open(config) // Closing a Realm (not strictly needed) realm.close() @codeWithMohit
24. Dependency Injection val koinModule = module { single { RealmConfiguration.with(schema = setOf(Person::class)) } single { Realm.open(get()) } } class MyRepository : KoinComponent { val realm: Realm by inject() } @codeWithMohit
25. Queries val id = "my-id" val realm: Realm by inject() val results: RealmResults<Person> = realm.query<Counter>("id = ${id}") @codeWithMohit
26. Realm Query Language • alwaysFalse • alwaysTrue • and • beginGroup • beginsWith • between • contains • distinct • endsWith • endGroup • equalTo • greaterThan • greaterThanOrEqual • in • isEmpty • isNotEmpty • isNotNull • isNull • lessThan • lessThanOrEqual • like • limit • maximumDate • minimumDate • not • notEqualTo • or • sort • average • count • sum • max • min @codeWithMohit
27. Realm Query langua ge Realm Query language @codeWithMohit
28. Listen for & React to changes in data val myPuppy = realm.query<Dog>("age”, “1").first().find() // Observe Realm Notifications myDog.asFlow().map{ when(it){ is InitialResults -> TODO() is UpdatedResults -> TODO() } } // Update the puppy’s age to see the effect realm.write { myPuppy.age = 3 } @codeWithMohit
29. Realm Studio @codeWithMohit
30. Half win!
31. Half win!
32. Atlas Device Sync Out of the box device-cloud synchronization Atlas Database Atlas Device Sync Mobile App @codeWithMohit
35. Sync Conflict Resolution Offline client deletes User1 Driver adds User3 and updates User2’s number t0 t1 Sync Changes t2 Sync Changes t2 Send Merged Changes t4 Send Merged Changes t4 Apply Conflict Resolution Rules t3 Delete Always Wins MongoDB Device Sync Last Update Wins Inserts in lists are ordered by time MongoDB Atlas Realm Sync Client Final State User List |- user0 : 000 |- user2 : 999 |- user3 : 003 Initial State User List |- user0 : 000 |- user1 : 001 |- user2 : 002
36. Thatʼs not all ! Out-of-the-box device-cloud synchronization Mobile-optimized database Ultra-lightweight and fast Object-oriented No ORM or DAO required Advanced security and permissions Built-in conflict resolution The leading developer data platform on the cloud Functions Triggers GraphQL DataAPI Data Access Control Atlas Realm Kotlin SDK Atlas Device Sync Search Charts Time Series @codewithMohit
37. Leading innovators leverage MongoDBʼs mobile & device solution
38. Scan to QR code to win cool Realm & MongoDB Swags
39. Thank you for your time. codeWithMohit