greenDAO2ObjectBox

Links
Sample code
- https://github.com/kaelaela/greenDAO2ObjectBox

ObjectBox press release
- http://greenrobot.org/announcement/introducing-objectbox-beta/

ObjectBox repo
- https://github.com/greenrobot/ObjectBox

Transcript

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

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

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

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

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5. ● 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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6. 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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7. 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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8. ● A new database based on greenDAO
   ● Do not use SQLite
   ● Pretty fast
   ● Latest version is v0.9.7(beta)
   

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

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

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

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

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14. 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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15. 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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16. Good news. Let’s try it.
    

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17. 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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18. 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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19. Replace annotations
    ● File paths are chended
    org.greenrobot.greendao.annotation
    > io.objectbox.annotation
    ● Relpace @ToOne @ToMany annotations with @Relation
    

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20. 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;
    }
    

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21. That’s all.
    Let’s build!!
    

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23. It is not work yet well.
    And source code is not public
    Wait for v1.
    

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24. Sample code
    https://github.com/kaelaela/greenDAO2ObjectBox
    

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25. See you next version released!
    

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