Recently, I am looking into Java remoting. I need to find the fastest protocol in remoting spectrum in order to ship a large number of objects across the net. Here I found a great article that experimented several popular remoting protocols and did a comparison. The protocols covered include:

RMI - Java remoting standard, each method needs [...]

Continue reading " Java Remoting - Benchmark "

Performance Testing
The goal is to identify the bottleneck in your code and optimize it if possible. 

Test against a single box - white box testing.
Bottleneck can happen in different levels:

Network
Application (code efficiency)
Database
OS (memory, CPU, IO, Swap) 

Tuning

Start at application and database level 
For the bottleneck that you fixed, you can use JUnitPref to check this out. JUnitPref enhances unit [...]

Continue reading " Agile Testing "

Create 2 tables
Item(id) and Item_log(item_id, price)
Populate it
insert into item(id) values(1);
insert into item(id) values(2);
insert into item(id) values(3);
insert into item(id) values(4);

insert into item_log(item_id, price) values(1, 100);
insert into item_log(item_id, price) values(1, 100);
insert into item_log(item_id, price) values(1, 100);
insert into item_log(item_id, price) values(1, 200);
insert into item_log(item_id, price) values(1, 200);
insert into item_log(item_id, price) values(1, 200);
insert into item_log(item_id, price) values(1, 200);
insert into [...]

Continue reading " Postgresql - Power of Array Type "

Unit test is to test the logic of a class with its dependencies mocked. To do that, here are the best practices I used when I test classes in different layers of my project.
Use TestNG
TestNG is a replacement for JUnit. It “fixes” many of the issues with JUnit, and we will use it as our [...]

Continue reading " Unit test your layered architecture "

Introduction of Spring MVC
I have heard that Spring MVC is cleaner and well-design than Struts 1.x. I found it no surprise as Spring already wins the heart of most J2EE developers like us. I decide to take a look at Spring MVC and see how I can logically map my concept from Struts to Spring [...]

Continue reading " Spring MVC - Part 1 "