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オフラインファーストなアプリケーション開発
zaki50
March 09, 2017
Technology
1
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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
zaki50
March 09, 2017
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Transcript
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ΦϑϥΠϯϑΝʔετ ΞϓϦέʔγϣϯ։ൃ 2017/3/9 Droid Kaigi 2017 16:00- Room3 Makoto
Yamazaki (@zaki50)
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Makoto Yamazaki Realm / uPhyca Inc. @zaki50
[email protected]
agenda ΦϑϥΠϯϑΝʔετͱ ΦϑϥΠϯϑΝʔετͰͷٕज़త՝ Realmతղܾࡦ σϞ ·ͱΊ
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ΦϑϥΠϯϑΝʔ ετʁ
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ΦϑϥΠϯϑΝʔετ ݩʑWebͰͷߟ͑ํ ࠷ॳ͔ΒΦϑϥΠϯͰͷಈ࡞Λߟ͑ͨWebαʔϏε ϒϥβ͕ϩʔΧϧʹετϨʔδΛ࣋ͯΔΑ͏ʹͳͬ ͨ
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ϞόΠϧ Billions of Minutes Online (USA) 0 250 500
750 1000 1250 1500 Jun 2013 Jun 2014 Jun 2015 Desktop Mobile App Mobile Browser
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ϞόΠϧͰͷΦϑϥΠϯϑΝʔετ αʔϏεΛޭͤ͞ΔͨΊʹྑ͍ΞϓϦ͕ඞཁ ΦϑϥΠϯͰͷར༻ίΞػೳ ར༻ऀΦϑϥΠϯͰ͑Δ͜ͱΛͨΓલͱࢥ͍࢝ Ίͨ
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ඞཁͳػೳ αʔόʔͱͷ௨৴ ΦϑϥΠϯ࣌ͷͨΊͷετϨʔδʗσʔλϕʔε ΦϯϥΠϯʹͳͬͨ࣌ͷσʔλಉظ ͜ΕΒ͕ࣗવͳܗͰΞϓϦͷػೳʹΈࠐ·Ε͍ͯΔ͜ͱ
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௨৴෦ͷ՝ Java, React Native, Xamarin σʔλϕʔε ௨৴ʗσʔλಉظػೳ Android
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௨৴ͷ՝
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σʔλϕʔεͷ՝ ΦϑϥΠϯ࣌༻ͷϩδοΫΛผ్࣮͢ Δ͜ͱ͕ඞཁ ΦϯϥΠϯ࣌: αʔόʔ͔Βऔಘ(ͱอଘ) ΦϑϥΠϯ࣌: σʔλϕʔε͔Βऔಘ
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ಉظͷ՝ ࠷৽ใͷऔಘλΠϛϯά ΦϯϥΠϯʹͳͬͨΒࡍͷΞοϓϩʔυ ෳͰͷมߋͷ౷߹ ਖ਼ͱ͍ͯ͠
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Realm Mobile Platform͕ղܾ͠·͢
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Realm Mobile Platform ෳσόΠεͷσʔλϕʔεΛϦΞϧλΠϜಉظ ΦϑϥΠϯͰϩʔΧϧͷσʔλϕʔε͕͑Δ 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
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RMPͰͷ௨৴ߏ Java, React Native, Xamarin σʔλϕʔε ௨৴ʗσʔλಉظػೳ Android
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୯ͳΔಉظҎ্ͷ͍ํ
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Realm Mobile Database
Ϟσϧͷఆٛ
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public class Task extends RealmObject { @PrimaryKey public
String id = UUID.randomUUID().toString(); @Required public Date createdAt = new Date(); public String text; public boolean completed; }
RealmΠϯελϯεͷऔಘ
[email protected]
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();
σʔλͷૠೖ
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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); } });
σʔλͷݕࡧͱͷΞΫηε
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final RealmResults<Task> completedTasks = realm.where(Task.class) .equalTo("completed", true) .findAll();
for (Task completedTask : completedTasks) { Log.d("debug", completedTask.text); }
σʔλͷߋ৽
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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; } });
σʔλͷআ
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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(); } });
มߋ௨
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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 } });
Realmͷ͍ํ·ͱΊ
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• Ϋϥεͱͯ͠ϞσϧΛఆٛ͢Δ • RealmΠϯελϯεΛऔಘ͢Δ • τϥϯβΫγϣϯͷதͰՃߋ৽Λߦ͏ • ݕࡧΛߦ͍ɺදࣔʹඞཁͳΦϒδΣΫτΛRealmResultsݸผͷ
ϞσϧΦϒδΣΫτͱͯ͠औಘ͢Δ • RealmResultsϞσϧΦϒδΣΫτʹηοτͨ͠ϦεφʔͰ࠷৽ ͷใΛड͚औΓදࣔ͢Δ
ͦͷଞͷಛ
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• ߴ • Ԇϩʔυ • σʔλϕʔε҉߸Խ • ΫϩεϓϥοτϑΥʔϜ(Android,
iOS) • etc.
ηοτΞοϓ
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// in build.gradle buildscript { repositories { jcenter()
} dependencies { classpath "io.realm:realm-gradle-plugin:3.0.0" } } // in app/build.gradle apply plugin: 'realm-android'
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σʔλಉظͷࣗવͳ֦ு
σʔλͷߋ৽
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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; } });
มߋ௨
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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 } });
σʔλͷߋ৽
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Server-side Realms completed = true; completed = true;
onChange()
ϩάΠϯ
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// 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);
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Demo
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িಥղܾ
ඪ४ͷղܾϧʔϧ
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আৗʹ༏ઌ͞ΕΔ ಉ͡ϓϩύςΟͷฤूޙউͪ Ϧετͷૠೖ࣌ؒॱ Operational TransformʹΑΓɺ֤ʹదͳ มߋηοτ͕͞ΕΔ
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CAPఆཧ ConsistencyʢҰ؏ੑʣ AvailabilityʢՄ༻ੑʣ Partition Toleranceʢஅੑʣ ̎ͭ·Ͱ͔͠ಉ࣌ʹຬͨ͢͜ͱ͕Ͱ͖ͳ͍
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CAPఆཧ ConsistencyʢҰ؏ੑʣ AvailabilityʢՄ༻ੑʣ Partition Toleranceʢஅੑʣ ҰൠతͳRDB
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CAPఆཧ ConsistencyʢҰ؏ੑʣ AvailabilityʢՄ༻ੑʣ Partition Toleranceʢஅੑʣ Apache HBaseɺMongoDB
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CAPఆཧ ConsistencyʢҰ؏ੑʣ AvailabilityʢՄ༻ੑʣ Partition Toleranceʢஅੑʣ DNSͳͲɻRealm Mobile Platform͜Ε
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Eventual Consistency Strong Eventual Consistency Strong Consistency Ұ؏ੑ
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·ͱΊ
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௨৴ͷ σʔλϕʔεͷ ಉظͷ ͍͜͠ͱRMPʹ·͔ͤΑ͏
ࢀߟใ
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realm.io