Google App Engine Low Level API Put and Get Sample

gaeds-lowlevel-put-get-sample.scala

// 共通部分
import com.google.appengine.api.datastore.{ DatastoreServiceFactory, Entity }

val ds = DatastoreServiceFactory.getDatastoreService
val kind = "Person"

// データ定義
case class Person(name: String, age: Long)

// 保存
val p = Person("John", 13)
val e = new Entity(kind)
e.setProperty("name", p.name)
e.setProperty("age", p.age)
val key = ds.put(e)

// 取得
val e2 = ds.get(key)
val p2 = Person(e2.getProperty("name").asInstanceOf[String], e2.getProperty("age").asInstanceOf[Long])