By default the kind of the datastore entity is derived from the simple name of the class, and test.test1.Test.class.getSimpleName() is the same as test.test2.Test.class.getSimpleName(). This is documented here: http://code.google.com/appengine/docs/java/datastore/dataclasses.html#Class_and_Field_Annotations
If you need to persist two classes in different packages but with the same
name you can override the kind like this:
@PersistenceCapable(table = "SomethingElse")
public class Test {
// ...
}
Hope this helps,
Max
On Fri, Jan 8, 2010 at 3:45 PM, w <windic...@gmail.com> wrote:
> I have two persistable classes: test.test1.Test and test.test2.Test,
> but I can't persist/query objects of these classes right. There is a
> simple example shows wrong behavior:
>
> test.TestServlet.java:
>
> package test;
>
> import java.io.IOException;
>
> import javax.jdo.JDOHelper;
> import javax.jdo.PersistenceManager;
> import javax.jdo.PersistenceManagerFactory;
> import javax.servlet.http.HttpServlet;
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.http.HttpServletResponse;
>
> public class TestServlet extends HttpServlet {
>
> public void doGet(HttpServletRequest request, HttpServletResponse
> response) throws IOException {
> PersistenceManager pm = pmFactory.getPersistenceManager();
> pm.makePersistent(new test.test1.Test("1", "test1"));
> pm.close();
>
> pm = pmFactory.getPersistenceManager();
> pm.makePersistent(new test.test2.Test("1", "test2"));
> pm.close();
>
> pm = pmFactory.getPersistenceManager();
> response.getWriter().println("RESULT: " + pm.getObjectById
> (test.test1.Test.class, "1"));
> pm.close();
> }
>
> public static final PersistenceManagerFactory pmFactory =
> JDOHelper.getPersistenceManagerFactory("transactions-optional");
>
> }
>
> test.test1.TestServlet.java and test.test2.TestServlet.java are the
> same except package name, so I missed it:
>
> import javax.jdo.annotations.*;
>
> @PersistenceCapable(identityType = IdentityType.APPLICATION)
> public class Test {
>
> public Test(String id, String data) {
> this.id = id; this.data = data;
> }
>
> public String toString() {
> return getClass().getName() + ": id=" + id + " data=" + data;
> }
>
> @PrimaryKey
> private String id;
>
> @Persistent
> private String data;
>
> }
>
> Surprising result I got is following:
>
> RESULT: test.test1.Test: id=1 data=test2
>
> Expected result:
>
> RESULT: test.test1.Test: id=1 data=test1
>
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