Window.alert(caught.toString()); in ContactUs alerts this exception when I use rpc in my gwt application. can anyone tell me why this is happening so?
The java classes are as follows :-
ContactUs.java :-
package com.businesstool.home.client;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
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.Composite;
import com.google.gwt.user.client.ui.HasText;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.TextArea;
import com.google.gwt.user.client.ui.Hyperlink;
import com.google.gwt.event.logical.shared.AttachEvent;
public class ContactUs extends Composite implements HasText {
private static ContactUsUiBinder uiBinder = GWT
.create(ContactUsUiBinder.class);
@UiField TextBox fullName;
@UiField TextBox emailId;
@UiField TextBox subject;
@UiField TextArea message;
@UiField Button postUs;
@UiField Hyperlink home;
interface ContactUsUiBinder extends UiBinder<Widget, ContactUs> {
}
public ContactUs() {
initWidget(uiBinder.createAndBindUi(this));
}
@Override
public String getText() {
// TODO Auto-generated method stub
return null;
}
@Override
public void setText(String text) {
// TODO Auto-generated method stub
}
@UiHandler("postUs")
void onPostUsClick(ClickEvent event) {
ContactUsBean contactUsBean=new ContactUsBean();
contactUsBean.setFullName(fullName.getText());
contactUsBean.setEmail(emailId.getText());
contactUsBean.setSubject(subject.getText());
contactUsBean.setMessage(message.getText());
if(contactUsBean.getFullName()==null || contactUsBean.getFullName().isEmpty()) {
Window.alert("Please fill First Name/Company Name");
} else if(contactUsBean.getEmail()==null || contactUsBean.getEmail().isEmpty()) {
Window.alert("Please fill contact email");
} else if(contactUsBean.getSubject()==null || contactUsBean.getSubject().isEmpty()) {
Window.alert("Please fill a subject");
} else if(contactUsBean.getMessage()==null || contactUsBean.getMessage().isEmpty()) {
Window.alert("Please fill your message");
} else {
ContactUsSubmissionServiceAsync contactUsSubmissionServiceAsync=ContactUsSubmissionService.Util.getInstance();
AsyncCallback<String> asyncCallback=new AsyncCallback<String>() {
@Override
public void onSuccess(String result) {
Window.alert(result);
fullName.setText("");
emailId.setText("");
subject.setText("");
message.setText("");
}
@Override
public void onFailure(Throwable caught) {
Window.alert(caught.toString());
}
};
ServiceDefTarget serviceDefTarget=(ServiceDefTarget) contactUsSubmissionServiceAsync;
String moduleRelativeURL=GWT.getModuleBaseURL()+"ContactUsSubmissionService";
serviceDefTarget.setServiceEntryPoint(moduleRelativeURL);
// contactUsSubmissionServiceAsync.submitContactUs(fName, email, subj, msg, asyncCallback);
contactUsSubmissionServiceAsync.submitContactUs(contactUsBean, asyncCallback);
}
}
@UiHandler("home")
void onHomeAttachOrDetach(AttachEvent event) {
}
@UiHandler("home")
void onHomeClick(ClickEvent event) {
RootPanel rootPanel=RootPanel.get();
rootPanel.remove(0);
rootPanel.add(new IndexPage());
}
}
ContactUsSubmissionService.java :-
package com.businesstool.home.client;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
@RemoteServiceRelativePath("ContactUsSubmissionService")
public interface ContactUsSubmissionService extends RemoteService {
/**
* Utility class for simplifying access to the instance of async service.
*/
public static class Util {
private static ContactUsSubmissionServiceAsync instance;
public static ContactUsSubmissionServiceAsync getInstance(){
if (instance == null) {
instance = GWT.create(ContactUsSubmissionService.class);
}
return instance;
}
}
public abstract String submitContactUs(ContactUsBean contactUsBean);
}
ContactUsSubmissionServiceAsync.java :-
package com.businesstool.home.client;
import com.google.gwt.user.client.rpc.AsyncCallback;
public interface ContactUsSubmissionServiceAsync {
public abstract void submitContactUs(ContactUsBean contactUsBean,
AsyncCallback<String> callback);
}
ContactUsSubmissionServiceImpl.java :-
package com.businesstool.home.server;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import vsrd.web.mail.SendMail;
import vsrd.web.mail.Validator;
import com.businesstool.home.client.ContactUsBean;
import com.businesstool.home.client.ContactUsSubmissionService;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
public class ContactUsSubmissionServiceImpl extends RemoteServiceServlet
implements ContactUsSubmissionService {
/**
*
*/
private static final long serialVersionUID = -6319962734395453042L;
@Override
public void service(final HttpServletRequest request,
HttpServletResponse response) {
}
@Override
public String submitContactUs(ContactUsBean contactUsBean) {
String fullName = contactUsBean.getFullName();
String email = contactUsBean.getEmail();
String subject = contactUsBean.getSubject();
String message = contactUsBean.getMessage();
String output = "Successfully sent your message to the admistrator.\nThanks";
Validator validator = new Validator();
if (fullName == null || fullName.trim().isEmpty()) {
output = "Invalid full name, failed posting message";
} else if (email == null || email.trim().isEmpty()) {
output = "Invalid Email Id, failed posting message";
} else if (subject == null || subject.trim().isEmpty()) {
output = "Invalid subject, failed posting message";
} else if (message == null || message.trim().isEmpty()) {
output = "Invalid message, failed posting message";
} else if (!validator.isValidEmail(email)) {
output = "Invalid email id, failed posting message";
} else {
message += "\n" + "Full name : " + fullName + "\nEMail Id : "
+ email;
SendMail sendMail = new SendMail();
String mailStatus = sendMail.sendMail("[email protected]",
"[email protected]", "Mr.XXX", email, subject,
message);
if (mailStatus == null) {
String mailStatus2 = sendMail
.sendMail(
"[email protected]",
email,
fullName,
"[email protected]",
"Confirmation mail from http://xxx.appspot.com",
"Thank you for your valuable message\n\n\nThanks & Regards\nAdministrator");
if (mailStatus2 == null) {
output += ", we have sent a confirmation message to your email.";
} else {
output += ",\n we have received your mail \nbut we failed to send a confirmation mail to "
+ email + " \nplease give the correct email id.";
}
} else {
output = "Posting failed";
}
}
return output;
}
}
ContactUsBean.java :-
package com.businesstool.home.client;
import java.io.Serializable;
public class ContactUsBean implements Serializable {
/**
*
*/
private static final long serialVersionUID = -2345125743115814903L;
private String fullName;
private String email;
private String subject;
private String message;
//getter setter methods.....
}
I fixed this problem by removing the overridden method public void service(final HttpServletRequest request, HttpServletResponse response) from ContactUsSubmissionServiceImpl.java. The issue was super.service(request, response) was not called in it therefore it could not handle any incoming requests.