Bo's Thinking

Overview GWT is not for the faint hearted. Even setting up the development environment causes the numerous efforts to get it right, I sweated a lot during my own time for bootstrap of the dev env. The special part of GWT is the capability of converting the Java code to the Javascript code. In light of this methodology, GWT is not as intuitive or natural as the regular Java development or Javascript development. In the following paragraphs, I'm going to highlight the most common obstacles developers might confront when bootstrapping the GWT development. I will take this repository -- https://github.com/Bo-Ye/three-kings-gwt as the example. Run following command to download source code from Github. git clone https://github.com/Bo-Ye/three-kings-gwt.git Troubleshooting in Eclipse GWT, first of all, is a web application which follows standard web project layout and can be deployed into web container such as, tomcat, jetty, etc. The example repository is a maven web...

Overview Trade Me is the most popular online auction e-commerce website in New Zealand, which features things very much like eBay. As an e-commerce platform, Trade Me provides APIs for third-parties vendors to spark their own ideas on top of Trade Me platform powerhouse. The API reference manual is as follows:  http://developer.trademe.co.nz/ , in the reference, among others, the authentication way on basis of OAuth is very complicated, check the following link for details:  http://developer.trademe.co.nz/api-overview/authentication/example-oauth-flow/ , unfortunately, Trade Me API manual doesn't contain vivid code examples to simplify the understanding. In this article, I will list all of steps with code snippets for Trade Me OAuth flow to make it vigorous in force, therefore, projects which lies on Trade Me API are easy to get started, especially for Java. Please be aware, trade me adopts OAuth 1.0 as authentication mechanism which is not compatible with OAuth...

Overview When we want to develop WebSocket application based on Java, Tomcat is a good fit because Tomcat 7 and onwards support WebSocket in default. Nevertheless, Tomcat deployed on Heroku Cloud PaaS needs slight tweaks. There are two existing solutions: Embedded Tomcat :  https://devcenter.heroku.com/articles/create-a-java-web-application-using-embedded-tomcat Webapp Runner :  https://devcenter.heroku.com/articles/java-webapp-runner Unfortunately, those two solutions don't work for WebSocket applications that work under standard tomcat. The Reason why exisiting solutions don't work The critical part makes WebSocket up and running in Tomcat is two jars under lib directory --  websocket-api.jar and  tomcat7-websocket.jar , they are the implementation of JSR 356 , Java API for WebSocket, the link tells the details,  http://www.oracle.com/technetwork/articles/java/jsr356-1937161.html . If we can find those two or stuff like that with regard t...

Overview Programming games could be super complicated, just imagine how fancy the scenes you can see in the Counter-Strike are, how sophisticated the weapon facilities are available in the Warcraft. However, on the flip side, building a game based on computer can also be reasonably easy and entertaining. Board games come into this category, in this article, I am going to use Java Swing to build a simple board game involved with board, layout and pieces, etc, which can serve as the entry level game programming that certainly paves the way to more advanced stages of game programming. Of note, Java Swing gains massive performance improvements in recent years due to the optimisations across multiple levels. The game rules and illustrations Game Board: There are two players, for each player there are three pieces. There are four borderlines forming square of the board; one horizontal line, one vertical line and two sloped lines are crossed at the centre point on the board. ...