How to register App on Facebook

Steps to create Apps on Facebook :

• 
  Login to your Facebook account and then Goto https://developers.facebook.com/ and then click on Apps tab. Check below screenshot :

Registration Page

• Enter the Display Name. This is required. 
• Enter Namespace. (Optional)
• Choose a Category and then click on Create App button. After verifying captcha It will show you the App ID and App Secret which is nothing but ClientId and ClientSecret . Check below screenshot :
  
  

• Select “Settings” and then click on “Advance” tab.
  
• Scroll down and enter your callback URL in “Valid Oauth redirect URIs” and then click on “Save Changes button to save your apps.
  

Congratulation!!! You have created your Apps on Facebook.

How to setup of WSO2 Identity Server on windows

What is WSO2 Identity Server ?

WSO2 Identity Server is an enterprise-ready, fully-open source, lean, component-based solution for facilitating security and provides secure identity management for enterprise web applications, services, and APIs by managing identity and entitlements of the user securely and efficiently.
It helps improve customer experience by reducing identity provisioning time, guaranteeing secure online interactions, and delivering a reduced single sign-on environment. WSO2 Identity Server decreases identity management, entitlement management, and administration burden by including role-based access control (RBAC) convention, fine-grained policy-based access control, and SSO bridging.

Downloading the product :

• In your Web browser, go to http://wso2.com/products/identity-server.

• If you are a new user downloading WSO2 products for the first time, register and log in.

• Once you are logged in, click the Binary button in the upper right corner of the page.

The binary distribution contains the Carbon binary files for both Windows and Linux operating systems, compressed into a single ZIP file.

Installing the Identity Server :

Before installing, You must set your JAVA_HOME environment variable.

• Download the latest version of the Identity Server as described above
• Extract the archive file to a dedicated directory for the Identity Server, which will hereafter be referred to as <WSO2_HOME>.

Starting the Server :

To start the server, you need to run the script “wso2server.bat” which is under $WSO2_HOME/bin folder.

Once the server has started, you can see the Management Console by opening a Web browser and typing in the management console's URL. You can check the URL as the last line in the start script's console. Check the screenshot below :

Use “admin” as username and password to sign in to the Management Console.

By default, The session-timeout value is 15 minutes but you can change this in the $WSO2_HOME/repository/conf/tomcat/carbon/WEB-INF/web.xml file as follows:

<session-config>

<session-timeout>15</session-timeout>

</session-config>

Stopping the Server :

To stop the server, press Ctrl+C in the command window or click the Shutdown/Restart link in the navigation pane in the Management Console.

Resources :
http://wso2.com/products/identity-server/

http://docs.wso2.org/display/IS460/WSO2+Identity+Server+Documentation

How to substitute dynamic placeholder in properties file

This blog will explain you how can you use replace placeholder with original value in properties file. To achieve this task we will you Java API MessageFormat.

Suppose you have properties file named "welcome.properties" having message :

welcome=Hi {0} , Welcome to {1}

Sample : 

import java.io.File;
import java.io.FileInputStream;
import java.text.MessageFormat;
import java.util.Properties;

/**
 * @author abdul
 *
 */
public class DynamicPlaceholder {

/**
* @param args
* @throws Exception 
*/
public static void main(String[] args) throws Exception {
File propFile = new File("D:\\juno\\Practise\\src\\com\\waheed\\dynamic\\placeholder\\substitution\\welcome.properties");
Properties props = new Properties();
FileInputStream stream=new FileInputStream(propFile);
props.load(stream);
String message = props.getProperty("welcome");
               // Here the {0} and {1} will be substitute with "Waheed" and "India".
String welcome = MessageFormat.format(message, "Waheed","India");
System.out.println("Your message : " + welcome);
}
}

Output : 

Your message : Hi Waheed , Welcome to India