package com.vaadin.tests.minitutorials.v70;
import javax.servlet.http.Cookie;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinService;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Notification;
import com.vaadin.ui.TextField;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;
/**
* Tutorial example for
* https://vaadin.com/wiki/-/wiki/Main/Setting%20and%20reading%20Cookies
*/
public class CookieMonsterUI extends UI {
private static final String NAME_COOKIE = "name";
@Override
protected void init(VaadinRequest request) {
final VerticalLayout layout = new VerticalLayout();
layout.setMargin(true);
setContent(layout);
final TextField nameField = new TextField();
layout.addComponent(nameField);
// Read previously stored cookie value
Cookie nameCookie = getCookieByName(NAME_COOKIE);
if (getCookieByName(NAME_COOKIE) != null) {
nameField.setValue(nameCookie.getValue());
}
Button button = new Button("Store name in cookie");
button.addClickListener(new Button.ClickListener() {
@Override
public void buttonClick(ClickEvent event) {
String name = nameField.getValue();
// See if name cookie is already set
Cookie nameCookie = getCookieByName(NAME_COOKIE);
if (nameCookie != null) {
String oldName = nameCookie.getValue();
nameCookie.setValue(name);
Notification.show("Updated name in cookie from " + oldName
+ " to " + name);
} else {
// Create a new cookie
nameCookie = new Cookie(NAME_COOKIE, name);
nameCookie
.setComment("Cookie for storing the name of the user");
Notification.show("Stored name " + name + " in cookie");
}
// Make cookie expire in 2 minutes
nameCookie.setMaxAge(120);
// Set the cookie path.
nameCookie.setPath(VaadinService.getCurrentRequest()
.getContextPath());
// Save cookie
VaadinService.getCurrentResponse().addCookie(nameCookie);
}
});
layout.addComponent(button);
}
private Cookie getCookieByName(String name) {
// Fetch all cookies from the request
Cookie[] cookies = VaadinService.getCurrentRequest().getCookies();
// Iterate to find a cookie by its name
for (Cookie cookie : cookies) {
if (name.equals(cookie.getName())) {
return cookie;
}
}
return null;
}
}