Here are the steps to run the super dev mode which is a new feature of GWT 2.5. The versions i used are GWT 2.5.1-rc1 and Chrome 26.0. That version of Chrome requires the latest version of GWT, otherwise it will not work. I tested it with GWT 2.5 previously and I could not see … Read more
To print a widget or an entire page with GWT, you can use JSNI and the JavaScript print function. A good practice is to put all the content you want to print inside a DIV tag, for instance : An id is assigned to that DIV tag (line 10) and a button is added to … Read more
Here is my book review of the second edition of the book Programmation GWT 2 (author : Sami Jaber). In French since the book is written in French. Cette deuxième édition fait 21 chapitres (516 pages) alors que la première édition comptait 17 chapitres (461 pages). Soit environ 50 pages supplémentaires. Elle prend en compte … Read more
And here is the report : https://vaadin.com/gwt/report-2012/ 1300 respondents who answered 30 questions. The report is 20 pages and full of data, charts, stats and commentaries ! Here are some conclusions from the report : compile time and widgets quality are the worst features of GWT cross browser compatibility is the favorite feature size of … Read more
I want to relay this interesting survey from the GWT Steering Committee (and Vaadin). You can take it here : https://vaadin.com/blog/-/blogs/the-future-of-gwt-survey
I have recently done a presentation of GWT 2.4 It is now available on slideshare.net : Presentation of GWT 2.4 View more presentations from Celinio Fernandes I might work on it again later. To make it a bit nicer.
GWT uses an embedded Jetty server. It is used at the beginning of the development of an application. During the prototype phase. Personally, I used it for about a year, until we got the need to use JMS. And since Jetty is not a Java EE server – it does not implement the JMS API … Read more
AOP can be a good solution to protect the business methods in an application developed with (or without) GWT. If we have a method called displayCustomerData(…) and we want to make sure only a certain category of users can call it, for instance the category MANAGER, then AOP can come to the rescue. I used … Read more
Uploading files to a filesystem, a remote server, a database, etc, is a frequent need in web applications. These files are often multipart data (that is of varying types such as XML, HTML, plain text, binary … ). With GWT, a good solution to handle this need is the use of the Apache Jakarta Commons … Read more
Here is a tip that I found on other blogs and I think is worth mentioning again. I tried it, it reduced the number of permutations from 15 to 3 only (1 permutation for IE, 1 permutation for the FR locale, 1 permutation for the EN locale). That means a compilation time of 1:05.750s instead … Read more
I just added a very basic GWT project to my github account to display a table with pagination and one sortable column. The code is mostly based on the official GWT tutorial : http://code.google.com/intl/en/webtoolkit/doc/latest/DevGuideUiCellTable.html I basically just added the SimplePage element to handle pagination : SimplePager pager = new SimplePager(); pager.setDisplay(table); Source : https://github.com/longbeach/MyFirstCellTable Demo … Read more
This has nothing to do with JPA. I was trying to deploy a GWT webapp to GAE when I suddenly got an error. As a remedy, i got the message : “java.io.IOException: Error posting to URL: https://appengine.google.com/api/appversion/create?app_id=tableaupagination&version=2& 409 Conflict Another transaction by user xxxxx is already in progress for this app and major version. That … Read more
Here is a first quick and simple tutorial on how to develop and deploy your very first GWT web application to Google App Engine.
Requirements :
Eclipse
Google Web Toolkit plugin for Eclipse
A Google App Engine account + GMAIL account
So here are the steps :