In this example, would Customer or AccountInfo properly be the entity group parent?
- by Badhu Seral
In this example, the Google App Engine documentation makes the Customer the entity group parent of the AccountInfo entity. Wouldn't AccountInfo encapsulate Customer rather than the other way around? Normally I would think of an AccountInfo class as including all of the information about the Customer.
import javax.jdo.annotations.IdGeneratorStrategy;
import javax.jdo.annotations.PersistenceCapable;
import javax.jdo.annotations.Persistent;
import javax.jdo.annotations.PrimaryKey;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.KeyFactory;
@PersistenceCapable
public class AccountInfo {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
public void setKey(Key key) {
this.key = key;
}
}
// ...
KeyFactory.Builder keyBuilder = new KeyFactory.Builder(Customer.class.getSimpleName(), "custid985135");
keyBuilder.addChild(AccountInfo.class.getSimpleName(), "acctidX142516");
Key key = keyBuilder.getKey();
AccountInfo acct = new AccountInfo();
acct.setKey(key);
pm.makePersistent(acct);
