Here is a simple snippet to find out the calling Java Class.

Class.forName(new Throwable().getStackTrace()[2].getClassName()));

Converting images from gif to jpg for web or other reason can be done easily using the ImageIO package. The following snippet convert all the gif images in directory rootDir to jpg images.Compile this class and execute using java command line. This utility class is also available as part of the Livrona Tools Project.The following is the code for the Image Converter.

By default rails does not clear out stale sessions from the session store. Depending on the configuration session can be stored in the local file system or the database.

This script retrieves the content of url and dumps it to the output

Example copy this script into file named : get_page.rb

#!/usr/bin/ruby
require 'net/http'
host,port,url = ARGV
http = Net::HTTP.new(host, port)
STDERR.puts "url {#url}"
response, data = http.get(url)
puts data

Usage

ruby get_page.rb <host> <port> <url>

The url is specified as a relative path