greenDAO2ObjectBox - Speaker Deck

greenDAO2ObjectBox

by Yuichi Maekawa

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greenDao2ObjectBox @kaelaela(Yuichi Maekawa) Work @ CyberAgent Twitter : kaelaela31 Github : kaelaela

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Agenda ● What is greenDAO and ObjectBox ● How to convert greenDAO to ObjectBox

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What is greenDAO and ObjectBox ● Made by greenrobot ● SQLite database ● ORM ● Based on code generation

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● Since 2011 ● ~ v2 :Need to make yourself DAOgenerator ● v3 ~ : Enable annotation ● Latest version is v3.2.1

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● Two Important concept ○ Schema: create db and make all tables and entities ○ Entity: add properties and relations to POJO ● Daos and entiries are generated by DaoGenerator

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v2 architecture DaoGenerator: generated class. Do not white code. DaoMaster: generated class. Use to get settion. DaoSession: generated class. Use to get dao. EntityDao: generated class. CRUD from database. Entity: generated entity(It has getter/setter. Editable)

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v3 architecture DaoGenerator: generated class. Do not white code. DaoMaster: generated class. Use to get settion. DaoSession: generated class. Use to get dao. EntityDao: generated class. CRUD from database. Entity: your entity. Annotate this. And generate code into this.

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● A new database based on greenDAO ● Do not use SQLite ● Pretty fast ● Latest version is v0.9.7(beta)

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ObjectBox ● Important concept ○ Object(POJO) ○ Box ○ BoxStore(like db) Memo Box Memo object

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ObjectBox ● Important concept ○ Object(POJO) ○ Box ○ BoxStore(like db) Memo Box

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ObjectBox ● Important concept ○ Object(POJO) ○ Box ○ BoxStore(like db) Memo Box some Box some Box some Box BoxStore

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v0.9.7(beta) architecture ● MyObjectBox: build BoxStore ● BoxStore: provide box for your object. Likes database. ● default.json: crucial ids here. Do not touch. ● Memo: your entity. Generated CRUD methods into this. ● Memo_: Property class. It is used to access member (ex. Memo_.id)

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interface box.put(memo); //insert, update box.remove(memo); box.getAll(); box.query().equal(Memo_.content, "test").build().find();

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Convert to ObjectBox(from v3) http://greenrobot.org/objectbox/documentation/introduction/ > Have an app with greenDAO? DaoCompat is for you! DaoCompat is an compatibility layer that gives you an greenDAO like API for ObjectBox. http://greenrobot.org/news/objectbox-presentation-thank-you/ > For existing apps using greenDAO Easy switch to ObjectBox

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Good news. Let’s try it.

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Build setting buildscript { repositories { maven { url "http://objectbox.net/beta-repo/" } } } dependencies { classpath 'io.objectbox:objectbox-gradle-plugin:0.9.7' } allprojects { repositories { maven { url "http://objectbox.net/beta-repo/" } } }

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Build setting apply plugin: 'io.objectbox' dependencies { compile 'org.greenrobot:greendao:3.2.0' compile 'io.objectbox:objectbox-android:0.9.7' compile 'io.objectbox:objectbox-daocompat:0.9.7' } objectbox { daoCompat true }

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Replace annotations ● File paths are chended org.greenrobot.greendao.annotation > io.objectbox.annotation ● Relpace @ToOne @ToMany annotations with @Relation

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Initialize MyObjectBox in Application @Override public void onCreate() { super.onCreate(); boxStore = MyObjectBox.builder().androidContext(this).build(); //use to old interface daoSession = new DaoSession(boxStore); } public BoxStore getBoxStore() { return boxStore; } public BoxStore getDaoSession() { return daoSession; }