Adding a new collaborator in github

Adding a new collaborator in github

Step1 : Open github
Step2 : Select the project (as a administrator).
Step3 : Click on the repository URL
Step4 : Click on the Admin button
Step5 : Select Private
Step6 : Click on "Add another collaborator" link
Step7 : Enter collaborator github account name.

Installing jdk and setting java path in ubuntu

Installing Java
step 1: Open Synaptic
step 2: Type sun in search box
step 3: select sun-java6-jre, sun-java6-jdk, sun-java6-fonts, sun-java6-bin

Setting Java path :
step 1: "which java" command gives the place where its installed , /usr/bin/java
step 2: open bashrc file and add java path,
#nano ~/.bashrc
add the java path,
export JAVA_HOME=/usr/lib/jvm/java-6-sun
export PATH=$PATH:$JAVA_HOME/bin
step 3:Execute the bashrc file
#source ~/.bashrc
step 4:check if java is compiling successfully,
#javac
This command should leave all the details of successful compilation

Amazon RDS installation and configuration on ubuntu

Amazon RDS(Relational Database Service)
Prerequisite : Account on aws.amazon.com

Installation :
Step 1: Download Amazon RDS command line tool kit http://developer.amazonwebservices.com/connect/entry.jspa%3FexternalID%3D2928%26categoryID%3D294
Step 2: Unzip the files to a location, I kept in /opt/RDSCli-1.1.005
Step 3: Create a credential file in RDSCli-1.1.005 folder
#cd RDSCli-1.1.005
Create a credential file as credential-file-path.conf
Step 4: credential-file-path.conf has access key and secret access key info as,
AWSAccessKeyId=xxxxxxxxx
AWSSecretKey=xxxxxxxxxxx
Step 5: Configure ~/.bashrc as
export AWS_RDS_HOME=/opt/RDSCli-1.1.005
export AWS_CREDENTIAL_FILE=$AWS_RDS_HOME/credential-file-path.conf
export PATH=$PATH:$AWS_RDS_HOME/bin
Step 6: Execute the bashrc file as,
# source ~/.bashrc
Step 7: To see that the command line toolkit is setup correctly type $rds—help

EC2 API Tools Installation

EC2 API tools serve as client interface for Amazon EC2 web service. One can use these tools to register and launch instances.


Installation on Ubuntu:


# apt-get install ec2-api-tools



Firefox extension for Amazon EC2

step 1: Download and Install the Firefox Extension for Amazon EC2 from http://s3.amazonaws.com/ec2-downloads/ec2ui.xpi

step 2: Run the extension, Launch Firefox and click on Tools/EC2 UI menu

step 3: Register your credentials with the plugin, Click on the “Credentials” button in the top left of the window. Enter your Account Name.Your Account Name needs to

match your username on the AWS developer site. Then enter your Access Key and Secret Key (these can be found when you log into the Amazon Web Services home page

( http://www.amazon.com/gp/browse.html%3Fnode%3D3435361)

step 4: View the list of available AMIs.

How to add "Cross Sell" with rails

cross_sell products (Related products):

create table products :

CREATE TABLE products (
id INT NOT NULL AUTO_INCREMENT,
name varchar(255) NOT NULL,
PRIMARY KEY (id)
);

Create a table 'cross_sell' in the mysql query browser :

CREATE TABLE cross_sells (
product_id INT NOT NULL,
cross_sell_product_id INT NOT NULL,
cs_position INT NOT NULL,
PRIMARY KEY (product_id, cross_sell_product_id),
UNIQUE KEY pos (cs_position)
);

steps to create a table in mysql query browser:

1. Right click on the database and select 'create table'.
2. Fill all the fields, all the columns and say apply. and execute.

In the model say 'product', type the following :
has_and_belongs_to_many :cross_sell_products,
:join_table => 'cross_sells',
:foreign_key => 'product_id',
:association_foreign_key => 'cross_sell_product_id',
:class_name => 'Product',
:order => 'cs_position'

In the show view of product :i.e in our example : /view/home/product.html.erb

Related Products :

<% @product.cross_sell_products.each do |cross_sell_product|%>
<%= link_to cross_sell_product.name, :action => 'product',
:id => cross_sell_product.id %>

<% end %>

Now fill in the table cross_sell, with product_id and its related product id, ie. cross_sell_id.

ActionWebService : Ruby on Rails

Installing the gem
$ sudo gem install datanoise-actionwebservice --source http://gems.github.com

Configuration

1. Add this line to your config/environment.rb file in the initializer section:

   config.gem 'datanoise-actionwebservice', :lib => 'actionwebservice'
   

2. Add this require statement to test/test_helper.rb file:

   require 'action_web_service/test_invoke'

Generating API controller

ActionWebService gem includes web_service generator that you can use like this:

$ ./script/generate web_service post
exists app/services/
exists app/controllers/
exists test/functional/
create app/services/post_api.rb
create app/controllers/post_controller.rb
create test/functional/post_api_test.rb


Note that your Apis are placed into app/services directory which Rails automatically includes in the search path, instead of the old app/apis directory.

Define your API

Open app/services/post_api.rb file and add methods that your service exposes:

class PostApi < ActionWebService::API::Base
api_method :get_posts, :returns => [[:string]]
end


Here, we defined get_posts method that accepts no parameters and returns an array of strings.

API implementation

We are going to use direct dispatching mode, so all methods that implement our API go directly to PostController itself:

class PostController < ApplicationController
wsdl_service_name 'Post'
web_service_api PostApi
web_service_scaffold :invocation if Rails.env == 'development'

def get_posts
["Post 1", "Post 2"]
end
end


Several things need to mention here:

1. We use scaffolding in the development mode, so we can easily test our API via the browser. Just go to http://localhost:3000/post/invocation and follow the screens to make an API call.

2. You can get WSDL of our Post API from http://localhost:3000/post/wsdl:

   $ curl http://localhost:3000/post/wsdl
   
    ...
   

3. The URL that you actually use to make API calls is http://localhost:3000/post/api

Unit Testing

As you probably noticed, our web_service generator created a unit test file test/functional/post_api_test.rb. Lets test our get_posts method:

require File.dirname(__FILE__) + '/../test_helper'
require 'post_controller'

class PostController; def rescue_action(e) raise e end; end

class PostControllerApiTest < Test::Unit::TestCase
def setup
@controller = PostController.new
@request = ActionController::TestRequest.new
@response = ActionController::TestResponse.new
end

def test_get_posts
result = invoke :get_posts
assert_equal(["Post 1", "Post 2"], result)
end
end


Lets see if it works:

$ ruby test/functional/post_api_test.rb
Loaded suite test/functional/post_api_test
Started
.
Finished in 0.182469 seconds.

1 tests, 1 assertions, 0 failures, 0 errors

Compiling Apache from source

Steps to compile apache:

step 1: get the source cd /home/hkorupol/software/

# wget http://mirrors.devlib.org/apache//httpd/httpd-2.2.10.tar.gz

#tar -xvzf http*

#cd httpd *

#./configure --prefix=/usr/local/apache2 \
--enable-so --enable-modules=all \
--enable-mods-shared=all –enable-proxy

#make

#make install