1.0life michael bloghttps://lifemichael.com/enHaim Michaelhttps://lifemichael.com/en/author/lifemichaelblog/rich600338<blockquote class="wp-embedded-content" data-secret="n8T8IuTtht"><a href="https://lifemichael.com/en/vaadin-architecture-pro/">Vaadin Architecture <font size=-2><a href=http://www.lifemichael.com/en/?page_id=73>PRO</a></font></a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://lifemichael.com/en/vaadin-architecture-pro/embed/#?secret=n8T8IuTtht" width="600" height="338" title="“Vaadin Architecture <font size=-2><a href=http://www.lifemichael.com/en/?page_id=73>PRO</a></font>” — life michael blog" data-secret="n8T8IuTtht" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,l){"use strict";var e=!1,o=!1;if(l.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=0;o<n.length;o++)n[o].style.display="none";for(o=0;o<i.length;o++)if(r=i[o],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=l.createElement("a"),a=l.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,a.host===s.host)if(l.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=l.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> The Vaadin framework is implemented on top of the Java Servlets API. When the web container receives the first request it instantiates the ApplicationServlet class. This is one of Vaadin framework classes. It extends HttpServlet. When developing a web application using the Vaadin framework we should define a class that extends com.vaadin.Application. Each and every […]