I spent one week trying to connect my GWT Client application to my Servlet throug RPC and I got a similar problem. I gave up testing from Eclipse/GWT plugin against my servlet handling the JDBC connection. It looks like GWT is forcing you to use Jetty and GWT database.
I solved the problem with the following solution: I created a Java package (.jar) to handle all JDBC statements only. The Servlet invokes the classes in that .jar files. I deployed the Servlet and the package in Tomcat I wrote a JSP to test the Servlet. It works great. I generated a jar file with my GWT Client application which implements RPC to call the Servlet. I deployed the GWT Client application in Tomcat. I tested the whole thing successfully. You can spent about one hours splitting your application in three pieces, but it'll work. After that I'm very happy using GWT just for UI. I hope this can help you. Greetings, JC On Jul 23, 5:16 pm, edprog <[email protected]> wrote: > Hello, > > I like the look and feel of GWT but I can find out why i am getting > a > > Error when invoking the pageable data service :404 <html> > <head> > <meta http-equiv="Content-Type" content="text/html; > charset=ISO-8859-1"/> > <title>Error 404 NOT_FOUND</title> > </head> > <body><h2>HTTP ERROR 404</h2> > <p>Problem accessing /timesheettracking/timesheetlogin. Reason: > <pre> NOT_FOUND</pre></p><hr /><i><small>Powered by Jetty://</small> > > I have spent 2 days already trying to figure it out and about to give > up. Here is my code > > WEB.XML > > <?xml version="1.0" encoding="UTF-8"?> > <!DOCTYPE web-app > PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" > "http://java.sun.com/dtd/web-app_2_3.dtd";> > <web-app> > <!-- Servlets --> > <servlet> > <servlet-name>timesheetLoginServlet</servlet-name> > <servlet- > class>com.timesheet.tmproject.server.TimeSheetLoginServiceImpl</ > servlet-class> > </servlet> > <servlet-mapping> > <servlet-name>timesheetLoginServlet</servlet-name> > <url-pattern>/TimeSheetTracking/timesheetlogin</url-pattern> > </servlet-mapping> > <!-- Default page to serve --> > <welcome-file-list> > <welcome-file>TimeSheetTracking.html</welcome-file> > </welcome-file-list> > </web-app> > > //TIMESHEET LOGIN SERVICE > > package com.timesheet.tmproject.client; > > import java.util.List; > > import com.google.gwt.user.client.rpc.RemoteService; > import com.google.gwt.user.client.rpc.RemoteServiceRelativePath; > > public interface TimeSheetLoginService extends RemoteService { > > public boolean isAuthenticated(String empID, String password ); > > } > > //TIMESHEET LOGIN SERVICE ASYNC > > package com.timesheet.tmproject.client; > > import com.google.gwt.user.client.rpc.AsyncCallback; > > public interface TimeSheetLoginServiceAsync { > public void isAuthenticated(String empID, String > password ,AsyncCallback callback); > > } > > //TIMESHEETTRACK.JAVA > > package com.timesheet.tmproject.client; > > import java.util.ArrayList; > import java.util.Iterator; > > import com.google.gwt.core.client.EntryPoint; > import com.google.gwt.core.client.GWT; > import com.google.gwt.event.dom.client.ClickEvent; > import com.google.gwt.event.dom.client.ClickHandler; > import com.google.gwt.event.dom.client.KeyCodes; > import com.google.gwt.event.dom.client.KeyUpEvent; > import com.google.gwt.event.dom.client.KeyUpHandler; > import com.google.gwt.user.client.Window; > import com.google.gwt.user.client.rpc.AsyncCallback; > import com.google.gwt.user.client.rpc.ServiceDefTarget; > import com.google.gwt.user.client.ui.Button; > import com.google.gwt.user.client.ui.ClickListener; > import com.google.gwt.user.client.ui.DialogBox; > import com.google.gwt.user.client.ui.FlowPanel; > import com.google.gwt.user.client.ui.HTML; > import com.google.gwt.user.client.ui.HorizontalPanel; > import com.google.gwt.user.client.ui.Label; > import com.google.gwt.user.client.ui.PasswordTextBox; > import com.google.gwt.user.client.ui.RootPanel; > import com.google.gwt.user.client.ui.SourcesTabEvents; > import com.google.gwt.user.client.ui.TabPanel; > import com.google.gwt.user.client.ui.TabListener; > import com.google.gwt.user.client.ui.TabPanel; > import com.google.gwt.user.client.ui.TextBox; > import com.google.gwt.user.client.ui.VerticalPanel; > import com.google.gwt.user.client.ui.Widget; > > /** > * Entry point classes define <code>onModuleLoad()</code>. > */ > public class TimeSheetTracking implements EntryPoint { > > VerticalPanel vpLogin = new VerticalPanel(); > private Label lblLoginEmpID = new Label("Employee ID"); > private TextBox txtEmpID = new TextBox(); > private Label lblLoginPassword = new Label("**Password "); > private PasswordTextBox txtPassword = new PasswordTextBox(); > private Button btnLogin = new Button("Login"); > private String _empID; > private String _password; > > final TimeSheetLoginServiceAsync timesheetLoginServlet = > (TimeSheetLoginServiceAsync) GWT > .create(TimeSheetLoginService.class); > > @SuppressWarnings("deprecation") > public void onModuleLoad() { > > ServiceDefTarget endpoint = (ServiceDefTarget) > timesheetLoginServlet; > endpoint.setServiceEntryPoint(GWT.getModuleBaseURL() + > "timesheetlogin"); > > txtEmpID.setStyleName("txtTextbox"); > txtPassword.setStyleName("txtTextbox"); > > lblLoginEmpID.setStyleName("lblLabels"); > lblLoginPassword.setStyleName("lblLabels"); > > btnLogin.setStyleName("btnButtons"); > > // Create a tab panel with three items. > TabPanel panel = new TabPanel(); > HorizontalPanel hpLogin = new HorizontalPanel(); > hpLogin.add(lblLoginEmpID); > hpLogin.add(txtEmpID); > vpLogin.add(hpLogin); > > HorizontalPanel hpLogin2 = new HorizontalPanel(); > hpLogin2.add(lblLoginPassword); > hpLogin2.add(txtPassword); > hpLogin2.add(btnLogin); > vpLogin.add(hpLogin2); > > panel.add(vpLogin, "Login"); > > panel.setWidth("100%"); > panel.selectTab(0); > > // Hook up a tab listener to do something when the user selects a > tab. > panel.addTabListener(new TabListener() { > public void onTabSelected(SourcesTabEvents sender, int > tabIndex) { > // Let the user know what they just did. > } > > public boolean onBeforeTabSelected(SourcesTabEvents sender, > int tabIndex) { > > // Just for fun, let's disallow selection of 'panel'. > // if (tabIndex == 1) > // return false; > return true; > } > }); > > // Add it to the root panel. > panel.setSize("500px", "250px"); > panel.addStyleName("table-center"); > > RootPanel.get().add(panel); > > btnLogin.addClickListener(new ClickListener() { > public void onClick(Widget sender) { > getLoginResult(); > } > > }); > } > > private void getLoginResult() { > AsyncCallback callback = new AsyncCallback() { > public void onSuccess(Object result) { > _empID = txtEmpID.toString(); > _password = txtPassword.toString(); > } > > public void onFailure(Throwable caught) { > Window.alert("Error when invoking the > pageable data service :" + > caught.getMessage()); > } > }; > > timesheetLoginServlet.isAuthenticated(txtEmpID.toString(),txtPassword.toStr > ing(), > callback); > > } > > } > > //TIMESHEETLOGINSERVICEIMPL > > package com.timesheet.tmproject.server; > > import java.sql.Connection; > import java.sql.DriverManager; > import java.sql.ResultSet; > import java.sql.SQLException; > import java.sql.Statement; > import java.util.ArrayList; > import java.util.List; > > import com.google.gwt.user.server.rpc.RemoteServiceServlet; > import com.timesheet.tmproject.client.TimeSheetLoginService; > > public class TimeSheetLoginServiceImpl extends RemoteServiceServlet > implements TimeSheetLoginService { > > private boolean isAuthentic = false; > private String _empID; > private String _password; > > public TimeSheetLoginServiceImpl() { > super(); > Authenticate(); > } > > public boolean Authenticate() > { > Connection conn = null; > try { > Class.forName("com.mysql.jdbc.Driver") > conn = > DriverManager.getConnection("jdbc:mysql://localhost:3306/ > timex", "root", ""); > > Statement st = conn.createStatement(); > ResultSet rs = st.executeQuery("SELECT employeeid, > password FROM > employee WHERE " + > > "employeeeID="+_empID+" AND password = > "+_password); > if(rs == null) > { > isAuthentic = false; > } > else > { > isAuthentic = true; > } > > } catch (SQLException e) { > e.printStackTrace(); > } catch (ClassNotFoundException e) { > e.printStackTrace(); > } finally{ > try { > conn.close(); > } catch (SQLException e) { > // TODO Auto-generated catch block > e.printStackTrace(); > } > } > return isAuthentic; > } > public boolean isAuthenticated(String empID, String password) { > _empID = empID; > _password = password; > > return Authenticate(); > } > > } > > Please, if you see anything here that may be causing this error, I > would appreciate to post a note. I am new at GWT and I am very > frustrated as I have spent too much time on this task... > > Thank you -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
