SingleWindow MutliProcess App

If you are using Google Chrome browser then you must have noticed that when you start Google Chrome, many chrome.exe processes appears in Windows Task Manager. Many people think that why there are so many chrome.exe processes are running when I have started only once Google Chrome browser, well that's because for every tab and every enabled extension chrome creates a new process to give you seamless experience of browsing even if any one of the tab or extension hangs due to any reason. When I first noticed about the Single chrome window with multiple tabs running each process for every tab, I wondered and thought they must have wrote awesome code to achieve this and never thought it would be so easy in reality. ;)
Here is how they might have done this -
Well that's very simple, you need to create a Main application window and then write your code in such a way that by any IPC technique when you get Handle for top most window you create new window as child window of this Main application window.
In C++, Win32 API you can create top main window using CreateWindow/Ex function, when you want to create a child window with different process create a new process of the same executable. Then pass this HWND to this process using any of the IPC method or simply in command line arguments to this new process, and design your code in such a way that when you get handle then you create new window using same CreateWindow/Ex api with this handle as parent handle and there it is. You get your SingleWindow multi process application. I will attach a sample code for this later.. :)
TIP: By SingleWindow I mean a single main application window with which user usually interact.

Comments

Java Tools Plugin for Notepad++

This post and the plugin is outdated. Please use plugin from this link which is updated and allows customization of shortcut key mappings and much more . Notepad++ is a great free editor. I like notepad++ because its a light weight editor and loads instantly. I use notepad++ for editing many files everyday. One plugin I always wanted was a plugin which lets me compile my java files and execute them from editor itself, but I couldn't find it so I wrote a myself. This plugin can be downloaded from this link . I am working on this plugin to make it more effective, so that if user have more than one installations of JDK or JRE then user should be able to choose which one to use etc. This is a simple plugin which has two commands- Compile - compiles a java file. Run - executes a java file. For using this plugin Java must be installed on the system.

Encrypt Decrypt data using AES in Java

AES stands for Advanced Encryption Standard. AES is an Symmetric Key Algorithm, that means key used for encrypting the data, same key will be used for decryption of the encrypted data. This algorithm supplants DES algorithm. This post shows how to use AES algorithm in Java to encrypt and decrypt data. Encrypting Data- import java.security.GeneralSecurityException; import javax.crypto.Cipher; import javax.crypto.KeyGenerator; import javax.crypto.SecretKey; public class AESTest1 { public static void main(String[] args) throws GeneralSecurityException { KeyGenerator keyGenerator = KeyGenerator.getInstance("AES"); keyGenerator.init(128); SecretKey key = keyGenerator.generateKey(); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, key); byte encryptedData[] = cipher.doFinal(args[0].getBytes()); } } In above example we have used KeyGenerator class, which generates key for encrypting data, as we are using...

Java Tools Plugin for Notepad++ Update

This post and the plugin is outdated. Please use plugin from this link which is updated and allows customization of shortcut key mappings and much more . This post is regarding the update for Notepad++ plugin which I wrote to use compile and execute Java programs from the Notepad++ editor itself. I have updated the plugin so that user can customize the shortcut keys assigned for compiling and executing the programs. Following image shows simple Settings dialog where you can customize the shortcut keys mapping. Although user can customize the keys but to apply them Notepad++ must be restarted. Well, I tried but in Notepad++, there is no way to change mapping after initialization process of plugin.. Click here to download the plugin.

TechSach

Search This Blog