Few days back I had a situation where I have to fetch some data based on a value of an item stored in one-to-many relationship. I my project I had two classes like below. I had to fetch all the Oders that has particular item.class Order { private List<Item> items; //more code ...}class Item { private String itemId; private String ...
Recently Blogger started providing different views for the blogs created in it. They are very cute way to view our blogs in different angles. Following is snapshot view of my blog. Try my blog on those different views using following urls.http://sandarenu.blogspot.com/view/flipcardhttp://sandarenu.blogspot.com/view/mosaichttp://sandarenu.blogspot.com/view/sideb
Its being long time since my last post......Hopping to do some posts more frequently in coming months. So keep your fingers crossed :) Sandarenu's Blog
Few weeks back I was given a task to migrate a Java application using MySQL as its database to MS SQL Server. It was actually not a full migration, rather application should be able work with both MySQL and MS SQL Server. Since we had used Hibernate in our application I thought it will be a easy thing. But when ...
Size of the javascript files and css files in a website has a big affect on its performance. Especially in slow connections lot of time will be spent on downloading those files. We recently came across such situation. Our website was using jQuery and some other javascipt libraries. Some of them were more than 100kb. Sometimes it took more than ...
This is a really nice comic I came across few days back. It is really nice and explains every thing what we generally going through as software engineers.....This one was originally published at http://www.my25percent.com/2009/09/eight-stages-of-programming-new-feature.html Sandarenu's Blog
SDPs are commonly developed as core systems which interconnect different Telco network services and provide one unified access point for customers (application developers). This will reduce the application development cost rapidly and easy management of applications for the Telco. Even though SDP reduces the application development cost, still the most difficult part remains; which is the development of the business ...
Last few weeks I was involved with a development related to SCTP protocol in Java. I have also done two posts on how to get started with SCTP. During that project I came across a strange issue. That is I receive two responses for all the packets I send to the peer. After doing some investigation we found that it ...
Shutdown hook is a mechanism provided by java for us to handle shutdown event of our applications. We can attach any piece of code to this and execute them just before JVM exits.public class ShutDownHookTest { public static void main(String [] args) throws Exception { System.out.println("System Started..."); Runtime.getRuntime().addShutdownHook(new Thread( new Runnable() { public void run() { System.out.println("System is Shutting Down..."); ...
Finally, a feature I was waiting for long time has been included to InfoQ. Now they give the mp3 files of the presentations posted in the site. Previously we had to use some tools to capture the streaming flash video and convert them in to mp3.
JMX is a mechanism where we can used to monitor and control our java applications remotely. We can expose variables and methods to outside using JMX. To access these exposed variables or methods, we have to use JMX Client. JConsole is the JMX client application shipped with Java. It is a swing based application. There is nothing wrong with JConsole ...
InfoQ is a very resource full web site for anyone in the software industry. They have lot of articles, white papers, and presentations in various topics related to software engineering. Presentation videos found in InfoQ have being recorded during various conferences and are really useful. I really love watching those videos since it is great opportunity to listen to industry ...
Few days back I came across this presentation at InfoQ site regarding "Eclipse, Mylyn and the TFI". I've seen the Mylyn view in the Eclipse and my idea about that was like some kind of a task management tool that comes with Eclipse IDE. After watching the vide my idea about Mylyn changed a lot and I was really ...
As I promised in my previous article here is very simple Client Server example for SCTP in Java. If you still have not installed and tested OpenJDK please follow the instructions given in my previous article. SCTP Server import java.io.IOException; import java.net.InetSocketAddress; import java.net.SocketAddress; import java.nio.ByteBuffer; import com.sun.nio.sctp.MessageInfo; import com.sun.nio.sctp.SctpChannel; import com.sun.nio.sctp.SctpServerChannel; /** * @author sandarenu * $LastChangedDate$ * $LastC
SCTP - Stream Control Transmission Protocol is a relatively new (standardize in year 200 by IETF) transport layer protocol to design to operate over IP. It is an alternative for TCP and UDP and combines many good features of those protocols. Main intention of developing SCTP was to cater the growing demand of IP telephony market. Since SCTP is relatively ...
There were lot of good feed back for my OpenCV articles (Article1, Article 2). There were lot of inquires regarding Haar Training and how to do it. Since I was bit busy with my work at hSenind I couldn't put any replies for that. Finally I managed to find some time to put together few URL and important tools where ...
Few days back I started to refactor some code of a project which I started few years back. Well actually I started working on that project during my second year first semester at the university. It is kind of a pet project which I started with one of my friends. When we started the project, our knowledge about best practices ...
This is nice presentation by Robert C. Martin posted at InfoQ. Here he talk about things that makes us professional. He talk about lot of important topics which help us to do better programming. If you are interested in programming this a going to be really really helpful for you.In my point of view it is a MUST read for ...
First release of the diGIT magazine was launched this month. It is a magazine dedicated for various stuff related to IT. This first release of the magazine is fairly large and rich in content ranging from introductory articles to advance stuff like ...
