Codebits by David Medinets
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2020

09/16/2010: How Do I Expose the Current RSPEC File and Description

My goal with this monkey patch was to expose the rspec filename and description as global variables so that my exception handling code can know which rspec test caused the exception. 
module Spec
  module Example
    module ExampleMethods
      alias :old_execute execute
      def execute(run_options, instance_variables)
        $rspec_location = @_proxy.location
        $rspec_description = description
        old_execute(run_options, instance_variables)
      end
    end
 end
end

09/12/2010: Compiling and Running Hadoop WordCount Example in NetBeans

In order to compile and run the Hadoop WordCount example in NetBeans, I followed these steps:
  1. Create a new Java project called hadoop.
  2. Copy the src/examples/org/apache/hadoop/WordCount.java to src/hadoop.
  3. Select Run>Set Project Configuration>Customize and change the Main class entry to hadoop.WordCount. Also set the arguments entry to 'input output".
  4. Add the following jar files as libraries: hadoop-0.20.2-core.jar, commons-cli-1.2.jar, commons-logging-1.0.4.jar, commons-httpclient-3.0.1.jar
  5. Add the following method to the WordCount class: 
    static public boolean deleteDirectory(File path) {
        if (path.exists()) {
            File[] files = path.listFiles();
            for (int i = 0; i < files.length; i++) {
                if (files[i].isDirectory()) {
                    deleteDirectory(files[i]);
                } else {
                    files[i].delete();
                }
            }
        }
        return (path.delete());
    }
  6. Add the following lines of code just before the "new Job" line: 
      // delete the output directory.
   WordCount.deleteDirectory(new File(otherArgs[1]));
  7. Create the input directory.
  8. Copy a text file into the input directory.
  9. Press F6 to run the program.
  10. Read the files in the output directory.