Is this sorted ? Same problem here too :( On Sunday, February 26, 2012 at 2:54:18 PM UTC+5:30, ani wrote: > > Hello, I’m trying to connect an android application with Google app > engine. I am using Google App Engine Datastore as my “database”. The > problem is that I am having difficulties in building entities on the > GAE datastore. > > I’m using JDO to create my entity and I am following the same code > pattern as on code.google.com > (http://code.google.com/appengine/docs/java/datastore/jdo/ > dataclasses.html > <http://code.google.com/appengine/docs/java/datastore/jdo/dataclasses.html>). > > > The whole thing runs without error but when I open it on Datastore > viewer at http://localhost:8888/_ah/admin, where I’m suppose to see > all my entities, none of them are being displayed. Instead I’m > receiving the following message: > “Datastore has no entities in the Empty namespace. You need to add > data programmatically before you can use this tool to view and edit > it.” > > I even tried to store a simple data object in the datastore for the > entity I created, but it does not work, so I am confusing whether the > entity has been created or not. > (http://code.google.com/appengine/docs/java/datastore/jdo/ > creatinggettinganddeletingdata.html > <http://code.google.com/appengine/docs/java/datastore/jdo/creatinggettinganddeletingdata.html>) > > > > Below is my Entity Category > > import javax.jdo.annotations.IdentityType; > import javax.jdo.annotations.IdGeneratorStrategy; > import javax.jdo.annotations.PersistenceCapable; > import javax.jdo.annotations.Persistent; > import javax.jdo.annotations.PrimaryKey; > > > @PersistenceCapable(identityType = IdentityType.APPLICATION) > public class Category{ > > @PrimaryKey > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) > Long id; > @Persistent > private String ccode; > @Persistent > private String cname; > > public Category(String ccode, String cname){ > this.ccode = ccode; > this.cname = cname; > } > > public Long getID() { > return id; > } > public void setID(Long id) { > this.id = id; > } > public String getCcode() { > return ccode; > } > public void setCode(String ccode) { > this.ccode = ccode; > } > public String getCname() { > return cname; > } > public void setCname(String cname) { > this.cname = cname; > } > > } > > Here i"m trying to add an object data in Entity category > > Class PMF > import javax.jdo.JDOHelper; > import javax.jdo.PersistenceManagerFactory; > import javax.jdo.PersistenceManager; > import com.google.appengine.api.datastore.Key; > import com.google.appengine.api.datastore.KeyFactory; > import our.fy.project.Category; > > public final class PMF { > private static final PersistenceManagerFactory pmfInstance = > JDOHelper.getPersistenceManagerFactory("transactions- > optional"); > private PMF() {} > public static PersistenceManagerFactory > getPersistenceManagerFactory() { > return pmfInstance; > } > public void addCategory(Category c) { > PersistenceManager pm = > getPersistenceManagerFactory().getPersistenceManager(); > c = new Category("abc","xyz"); > Key key = > KeyFactory.createKey(Category.class.getSimpleName(), "011"); > > c.setKey(key); > > try { > pm.makePersistent(c); > } finally { > pm.close(); > } > } > > > Can anyone help, whether I am missing something or not? Thanks.
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