Ever since I advanced beyond the “hello worlds” of Java, I had never stopped coding. This section is for documenting code usages that I had employed while solving the technological problems that I had encountered.
It was time when simple file IO was not enough to manage data persistence in the .NET application that I had been building. Prior to encountering this situation, I had always wanted to gain practical experience with SQLite. With some googling, I found a .NET wrapper around the SQLite library that I could use in my application. This post documents my experience with using the System.Data.SQLite wrapper.
As software developers, we are always developing applications that can communication with other components: A server side script that echoes html to the browser, the client application that send information to a remote server endpoint and etc. One of the requirements that I got from my project was to display feedback from a windows service. However, because of session 0 isolation in windows 7, invocations of visual display logic from the windows service application is not enough to fulfill the requirement. In order to display feedback from a windows service application, I created a separate form application that runs when users log in and have the form application connects to the windows service application via TCP/IP to listen for feedback. Communication between the two applications is achieved via Object Serialization in .NET framework.
A few weeks back, I wrote some logic to send a file and a from a windows client over to a Java server endpoint. There are a few ways to do that: via application protocols like FTP and HTTP or even implementing a custom protocol using TCP/IP. Since the Java server was already serving HTTP requests and that HTTP requests can usually get through firewalls quite easily, I chose the HTTP protocol.
Recently, I have been tasked to write a .NET application that will prepare the operating system environment for a user who had logged on a Windows 7 machine. As a first step, the application should grab some settings from the network by providing the username of the user to a server application. The application will then prepare the operating system environment based on the settings received.
There are times when you feel that the default look of a submit button is just not enough for your webpage. One way to change the default look of your submit button is to use a background image. In this post, I document my attempt in using a background image for my submit button in the search this blog section of my blog.
When it comes to task automation in the windows environment, vbscript is a very good scripting language to use. This post documents some useful functions that I had included in my scripts to deal with zip files and creating folders.
Content is king and large software cannot get away from serving content. In this post, I shall document how to use Java to access relational databases, with the MySQL database as an example.
Object creation can be expensive in terms of processing time and memory utilization. While there are cases where multiple object instances are inevitable to getting things done, there are certainly cases where only a single instance of object is sufficient. For example, if your program is only going to access a single database instance, it suffice to dedicate a single object that manages database connection(s) to your database server. Other examples are objects used for logging messages, objects used for loading/saving configuration details, objects used for managing threads and objects used for managing access to shared hardware devices such as the printer.
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