[appengine-java] Re: failure in simple JDO query
hmm...
I did through eclipse...
On Oct 8, 3:11 am, Arnold wrote:
> May be try restarting the development mode server.
>
> On Oct 7, 8:42 pm, x_maras wrote:
>
>
>
> > Hi,
>
> > I was trying to do some simple JDO queries in order to find my way in
> > java google app engine.
> > I have an persistent object where I store information about users,
> > called UserData
> > I also have made a class DAO where I have methods for creating new
> > users for checking if a user exist and to show data for users.
> > I created 2 records successfully but I can't read them.
> > The error that I get is
> > HTTP ERROR 500
>
> > Problem accessing /. Reason:
>
> > com.awt.oat.dao.UserDao.showUserData()V
> > Caused by:
>
> > java.lang.NoSuchMethodError: com.awt.oat.dao.UserDao.showUserData()V
> > at org.apache.jsp.auction_jsp._jspService(auction_jsp.java:89)
> > at
> > org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
> >
> > and a lot more
> >
>
> > I'm sure that I 'm doing something really stupid. Please someone to
> > help me...
>
> > Here is my DAO class code:
>
> > package com.awt.oat.dao;
>
> > import javax.jdo.PersistenceManager;
> > import com.awt.oat.PMF;
> > import com.awt.oat.model.UserData;
> > import com.google.appengine.api.users.User;
> > import javax.jdo.Query;
> > import java.util.List;
> > import java.util.Date;
> > import javax.jdo.JDOObjectNotFoundException;
>
> > public class UserDao {
> > public void createUser(String uniqueID, String userName, String
> > email)
> > {
> > Date date = new Date();
> > UserData newUser = new UserData(uniqueID, userName, email,
> > date);
>
> > PersistenceManager pm = PMF.get().getPersistenceManager();
> > try {
> > pm.makePersistent(newUser);
> > }finally {
> > pm.close();
> > }
> > }
>
> > public void showUserData(){
>
> > PersistenceManager pm = PMF.get().getPersistenceManager();
> > Query query = pm.newQuery(UserData.class);
>
> > try{
> > List results = (List)query.execute();
>
> > if (results.iterator().hasNext()) {
> > for(UserData u : results){
> > System.out.println("" +
> > "username"
> > + u.getUserName() + ""
> > + "email"
> > + u.getEmail() + " > table>");
> > }
> > } else {
> > System.out.printf("No results in the
> > datastore");
> > }
> > }finally{
> > query.closeAll();
> > }
> > }
>
> > }
>
> > and here my jsp file
>
> > <%@ page contentType="text/html;charset=UTF-8" language="java" %>
> > <%@ page import="java.util.List" %>
> > <%@ page import="javax.jdo.PersistenceManager" %>
> > <%@ page import="com.google.appengine.api.users.User" %>
> > <%@ page import="com.google.appengine.api.users.UserService" %>
> > <%@ page import="com.google.appengine.api.users.UserServiceFactory" %>
> > <%@ page import="com.awt.oat.dao.UserDao" %>
> > <%@ page import="java.io.*" %>
>
> >
> >
> >
> >
> >
> > <%
> > UserService userService = UserServiceFactory.getUserService();
> > User user = userService.getCurrentUser();
> > if (user != null) {
> > %>
> > Hello, <%= user.getNickname() %>! (You can
> > sign out.)
> > <%
> > } else {
> > %>
> > Sign in
> > <%
> > }
> > UserDao dao = new UserDao();
> > //dao.createUser(user.getUserId(), user.getNickname(),
> > user.getEmail()); this one works creates new users in the database
> > dao.showUserData(); //this gives me error
> > %>
> >
> >
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[appengine-java] Re: failure in simple JDO query
May be try restarting the development mode server.
On Oct 7, 8:42 pm, x_maras wrote:
> Hi,
>
> I was trying to do some simple JDO queries in order to find my way in
> java google app engine.
> I have an persistent object where I store information about users,
> called UserData
> I also have made a class DAO where I have methods for creating new
> users for checking if a user exist and to show data for users.
> I created 2 records successfully but I can't read them.
> The error that I get is
> HTTP ERROR 500
>
> Problem accessing /. Reason:
>
> com.awt.oat.dao.UserDao.showUserData()V
> Caused by:
>
> java.lang.NoSuchMethodError: com.awt.oat.dao.UserDao.showUserData()V
> at org.apache.jsp.auction_jsp._jspService(auction_jsp.java:89)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
>
> and a lot more
>
>
> I'm sure that I 'm doing something really stupid. Please someone to
> help me...
>
> Here is my DAO class code:
>
> package com.awt.oat.dao;
>
> import javax.jdo.PersistenceManager;
> import com.awt.oat.PMF;
> import com.awt.oat.model.UserData;
> import com.google.appengine.api.users.User;
> import javax.jdo.Query;
> import java.util.List;
> import java.util.Date;
> import javax.jdo.JDOObjectNotFoundException;
>
> public class UserDao {
> public void createUser(String uniqueID, String userName, String email)
> {
> Date date = new Date();
> UserData newUser = new UserData(uniqueID, userName, email,
> date);
>
> PersistenceManager pm = PMF.get().getPersistenceManager();
> try {
> pm.makePersistent(newUser);
> }finally {
> pm.close();
> }
> }
>
> public void showUserData(){
>
> PersistenceManager pm = PMF.get().getPersistenceManager();
> Query query = pm.newQuery(UserData.class);
>
> try{
> List results = (List)query.execute();
>
> if (results.iterator().hasNext()) {
> for(UserData u : results){
> System.out.println("" +
> "username" +
> u.getUserName() + ""
> + "email" +
> u.getEmail() + " table>");
> }
> } else {
> System.out.printf("No results in the
> datastore");
> }
> }finally{
> query.closeAll();
> }
> }
>
> }
>
> and here my jsp file
>
> <%@ page contentType="text/html;charset=UTF-8" language="java" %>
> <%@ page import="java.util.List" %>
> <%@ page import="javax.jdo.PersistenceManager" %>
> <%@ page import="com.google.appengine.api.users.User" %>
> <%@ page import="com.google.appengine.api.users.UserService" %>
> <%@ page import="com.google.appengine.api.users.UserServiceFactory" %>
> <%@ page import="com.awt.oat.dao.UserDao" %>
> <%@ page import="java.io.*" %>
>
>
>
>
>
>
> <%
> UserService userService = UserServiceFactory.getUserService();
> User user = userService.getCurrentUser();
> if (user != null) {
> %>
> Hello, <%= user.getNickname() %>! (You can
> sign out.)
> <%
> } else {
> %>
> Sign in
> <%
> }
> UserDao dao = new UserDao();
> //dao.createUser(user.getUserId(), user.getNickname(),
> user.getEmail()); this one works creates new users in the database
> dao.showUserData(); //this gives me error
> %>
>
>
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