オフラインファーストなアプリケーション開発

DroidKaigi 2017 Day1
16:00-16:50 Room 3

1. my@realm.io ΦϑϥΠϯϑΝʔετ ΞϓϦέʔγϣϯ։ൃ 2017/3/9 Droid Kaigi 2017 16:00- Room3 Makoto Yamazaki (@zaki50)
2. my@realm.io Makoto Yamazaki Realm / uPhyca Inc. @zaki50
3. my@realm.io agenda ΦϑϥΠϯϑΝʔετͱ͸ ΦϑϥΠϯϑΝʔετͰͷٕज़త՝୊ Realmతղܾࡦ σϞ ·ͱΊ
4. my@realm.io ΦϑϥΠϯϑΝʔ ετʁ
5. my@realm.io ΦϑϥΠϯϑΝʔετ ݩʑ͸WebͰͷߟ͑ํ ࠷ॳ͔ΒΦϑϥΠϯͰͷಈ࡞Λߟ͑ͨWebαʔϏε ϒϥ΢β͕ϩʔΧϧʹετϨʔδΛ࣋ͯΔΑ͏ʹͳͬ ͨ
6. my@realm.io ϞόΠϧ Billions of Minutes Online (USA) 0 250 500 750 1000 1250 1500 Jun 2013 Jun 2014 Jun 2015 Desktop Mobile App Mobile Browser
7. my@realm.io ϞόΠϧͰͷΦϑϥΠϯϑΝʔετ αʔϏεΛ੒ޭͤ͞ΔͨΊʹ͸ྑ͍ΞϓϦ͕ඞཁ ΦϑϥΠϯͰͷར༻͸ίΞػೳ ར༻ऀ͸ΦϑϥΠϯͰ࢖͑Δ͜ͱΛ౰ͨΓલͱࢥ͍࢝ Ίͨ
8. my@realm.io ඞཁͳػೳ αʔόʔͱͷ௨৴ ΦϑϥΠϯ࣌ͷͨΊͷετϨʔδʗσʔλϕʔε ΦϯϥΠϯʹͳͬͨ࣌ͷσʔλಉظ ͜ΕΒ͕ࣗવͳܗͰΞϓϦͷػೳʹ૊Έࠐ·Ε͍ͯΔ͜ͱ
9. my@realm.io ௨৴෦෼ͷ՝୊ Java, React Native, Xamarin σʔλϕʔε ௨৴ʗσʔλಉظػೳ Android
10. my@realm.io ௨৴ͷ՝୊
11. my@realm.io σʔλϕʔεͷ՝୊ ΦϑϥΠϯ࣌༻ͷϩδοΫΛผ్࣮૷͢ Δ͜ͱ͕ඞཁ ΦϯϥΠϯ࣌: αʔόʔ͔Βऔಘ(ͱอଘ) ΦϑϥΠϯ࣌: σʔλϕʔε͔Βऔಘ
12. my@realm.io ಉظͷ՝୊ ࠷৽৘ใͷऔಘλΠϛϯά ΦϯϥΠϯʹͳͬͨΒࡍͷΞοϓϩʔυ ෳ਺୺຤Ͱͷมߋͷ౷߹ ਖ਼௚ͱͯ΋೉͍͠
13. my@realm.io Realm Mobile Platform͕ղܾ͠·͢
14. my@realm.io Realm Mobile Platform ෳ਺σόΠεͷσʔλϕʔεΛϦΞϧλΠϜಉظ ΦϑϥΠϯͰ΋ϩʔΧϧͷσʔλϕʔε͕࢖͑Δ ΦϑϥΠϯ࣌ͷมߋিಥΛࣗಈղܾ SD SD SD SDK SD Object Store Sync
 Server RMP Dashboar d Event Auth System Encryption Layer Rules Engine Data Connect ors Real-time Sync
15. my@realm.io RMPͰͷ௨৴ߏ੒ Java, React Native, Xamarin σʔλϕʔε ௨৴ʗσʔλಉظػೳ Android
16. my@realm.io ୯ͳΔಉظҎ্ͷ࢖͍ํ
17. my@realm.io Realm Mobile Database
18. Ϟσϧͷఆٛ my@realm.io public class Task extends RealmObject { @PrimaryKey public String id = UUID.randomUUID().toString(); @Required
 public Date createdAt = new Date();
 
 public String text;
 public boolean completed; }
19. RealmΠϯελϯεͷऔಘ my@realm.io Realm realm = Realm.getDefaultInstance(); // 様々な機能へアクセスするための入り口。 // データベースコネクションと捉えることも可能。 ... // 終わったら忘れずに閉じる realm.close();

20. σʔλͷૠೖ my@realm.io final Task task = new Task();
 task.text = "原稿を書く"; realm.executeTransactionAsync(new Realm.Transaction() {
 @Override
 public void execute(Realm realm) {
 realm.insert(task);
 }
 });
21. σʔλͷݕࡧͱ஋΁ͷΞΫηε my@realm.io final RealmResults<Task> completedTasks = realm.where(Task.class)
 .equalTo("completed", true) .findAll();
 for (Task completedTask : completedTasks) {
 Log.d("debug", completedTask.text);
 }

22. σʔλͷߋ৽ my@realm.io RealmResults<Task> allTasks = realm.where(Task.class) .findAllSorted("createdAt"); // たとえばリストで position == 5 の要素がタップされた時 final Task task = allTasks.get(5); 
 realm.executeTransaction(new Realm.Transaction() {
 @Override
 public void execute(Realm realm) { task.completed = true; }
 });
23. σʔλͷ࡟আ my@realm.io RealmResults<Task> allTasks = realm.where(Task.class) .findAllSorted("createdAt"); // たとえばリストで position == 5 の要素がスワイプされた時 final Task task = allTasks.get(5); 
 realm.executeTransaction(new Realm.Transaction() {
 @Override
 public void execute(Realm realm) { task.deleteFromRealm(); }
 });
24. มߋ௨஌ my@realm.io completedTasks.addChangeListener(
 new OrderedRealmCollectionChangeListener<RealmResults<Task>>() {
 @Override
 public void onChange(RealmResults<Task> tasks,
 OrderedCollectionChangeSet changeSet) {
 // changeSetから、追加／削除／更新があった要素を取得 可能
 }
 });
25. Realmͷ࢖͍ํ·ͱΊ my@realm.io • Ϋϥεͱͯ͠ϞσϧΛఆٛ͢Δ • RealmΠϯελϯεΛऔಘ͢Δ • τϥϯβΫγϣϯͷதͰ௥Ճ΍ߋ৽Λߦ͏ • ݕࡧΛߦ͍ɺදࣔʹඞཁͳΦϒδΣΫτΛRealmResults΍ݸผͷ ϞσϧΦϒδΣΫτͱͯ͠औಘ͢Δ • RealmResults΍ϞσϧΦϒδΣΫτʹηοτͨ͠ϦεφʔͰ࠷৽ ͷ৘ใΛड͚औΓදࣔ͢Δ
26. ͦͷଞͷಛ௃ my@realm.io • ߴ଎ • ஗Ԇϩʔυ • σʔλϕʔε҉߸Խ • ΫϩεϓϥοτϑΥʔϜ(Android, iOS) • etc.
27. ηοτΞοϓ my@realm.io // in build.gradle buildscript { repositories { jcenter() } dependencies { classpath "io.realm:realm-gradle-plugin:3.0.0" } } // in app/build.gradle apply plugin: 'realm-android'
28. my@realm.io σʔλಉظ΁ͷࣗવͳ֦ு
29. σʔλͷߋ৽ my@realm.io RealmResults<Task> allTasks = realm.where(Task.class) .findAllSorted("createdAt"); // たとえばリストで position == 5 の要素がタップされた時 final Task task = allTasks.get(5); 
 realm.executeTransaction(new Realm.Transaction() {
 @Override
 public void execute(Realm realm) { task.completed = true; }
 });
30. มߋ௨஌ my@realm.io completedTasks.addChangeListener(
 new OrderedRealmCollectionChangeListener<RealmResults<Task>>() {
 @Override
 public void onChange(RealmResults<Task> tasks,
 OrderedCollectionChangeSet changeSet) {
 // changeSetから、追加／削除／更新があった要素を取得可能
 }
 });
31. σʔλͷߋ৽ my@realm.io Server-side Realms completed = true; completed = true; onChange()
32. ϩάΠϯ my@realm.io // 認証 SyncCredentials credential = SyncCredentials.usernamePassword(email, password, false);
 SyncUser user = SyncUser.login(credential, RealmTasksApplication.AUTH_URL);
 SyncConfiguration defaultConfig = new SyncConfiguration.Builder(user, RealmTasksApplication.REALM_URL) .build();
 Realm.setDefaultConfiguration(defaultConfig);
33. my@realm.io Demo
34. my@realm.io িಥղܾ
35. ඪ४ͷղܾϧʔϧ my@realm.io ࡟আ͸ৗʹ༏ઌ͞ΕΔ ಉ͡ϓϩύςΟͷฤू͸ޙউͪ Ϧετ΁ͷૠೖ͸࣌ؒॱ Operational TransformʹΑΓɺ֤୺຤ʹద੾ͳ มߋηοτ͕഑෍͞ΕΔ
36. my@realm.io CAPఆཧ ConsistencyʢҰ؏ੑʣ AvailabilityʢՄ༻ੑʣ Partition Toleranceʢ෼அ଱ੑʣ ̎ͭ·Ͱ͔͠ಉ࣌ʹຬͨ͢͜ͱ͕Ͱ͖ͳ͍
37. my@realm.io CAPఆཧ ConsistencyʢҰ؏ੑʣ AvailabilityʢՄ༻ੑʣ Partition Toleranceʢ෼அ଱ੑʣ ҰൠతͳRDB
38. my@realm.io CAPఆཧ ConsistencyʢҰ؏ੑʣ AvailabilityʢՄ༻ੑʣ Partition Toleranceʢ෼அ଱ੑʣ Apache HBaseɺMongoDB
39. my@realm.io CAPఆཧ ConsistencyʢҰ؏ੑʣ AvailabilityʢՄ༻ੑʣ Partition Toleranceʢ෼அ଱ੑʣ DNSͳͲɻRealm Mobile Platform΋͜Ε
40. my@realm.io Eventual Consistency Strong Eventual Consistency Strong Consistency Ұ؏ੑ
41. my@realm.io ·ͱΊ
42. my@realm.io ௨৴ͷ໰୊ σʔλϕʔεͷ໰୊ ಉظͷ໰୊ ೉͍͜͠ͱ͸RMPʹ·͔ͤΑ͏
43. ࢀߟ৘ใ my@realm.io realm.io