Get domain information (WHOIS) using Apache Commons Net API- ADF & Java

We can get any domain information using Apache commons net library. It supports various protocols and WHOIS information is one of them

WhoisClient class provides access of domain information
See what docs says -

The WhoisClient class implements the client side of the Internet Whois Protocol defined in RFC 954. To query a host you create a WhoisClient instance, connect to the host, query the host, and finally disconnect from the host. If the whois service you want to query is on a non-standard port, connect to the host at that port.

Download required library or if this link doesn't work then goto API page and download from there

This simple java method will fetch information of domain using Apache library

Blog Completed 3 awesome years

I am happy to tell you that my (Ashish Awasthi's Blog) blog has completed 3 years today.
On 14-October-2012 i have posted my first blog post on ADF Basics: Show inline Message in Oracle ADF and till now blog has more than 180 posts on ADF, Java, JavaScript, jQuery etc.

I started blogging to help Java & ADF developers, to share what i have learnt and still trying to do same
Initially started this blog with blogspot.com - oracleadf-java.blogspot.com & after one year changed it to a custom domain www.awasthiashish.com

It has 1700+ fan following on facebook -Facebook Page
Now i am trying to put some more interesting stuff to learn, Keep an eye on blog

Taking as a whole it was awesome journey of 3 years :) Thanks for your support , Keep reading Keep Learning :)

Now say Happy B'day to Ashish Awasthi's Blog  :)

ADF Basics: Reorder ADF table column using DisplayIndex property

This post is about a very simple use case that is reordering of af:table column at run time. 

Ordering of columns in af:table is controlled by DisplayIndex property of af:column
Check what docs says-

Default Value: -1

The display order index of the column. Columns can be re-arranged and they are displayed in the table based on the displayIndex. Columns are sorted based on the displayIndex property, columns without displayIndex are displayed at the end, in the order in which they appear. The displayIndex attribute is honored only for top level columns, since it is not possible to rearrange a child column outside of the parent column.
Not supported on the following renderkits: org.apache.myfaces.trinidad.core

We can set DisplayIndex property for all columns in a sequence (1,2,3 etc) that we want to see on page

Allow user input in Jdeveloper for Java applications, Using Java Scanner Class to take input from console

Sometimes we have to take input from Keyboard when we use Scanner or BufferedReader class.
and to take input from Jdeveloper we have to change a setting to allow user input in Jdeveloper.

Let's take an example of java.util.Scanner class-

package client;

import java.util.Scanner;

public class UserInput {
    public UserInput() {
        super();
    }

    public static void main(String[] args) {
        System.out.println("Please Enter your Name-");
        Scanner sc = new Scanner(System.in);
        String name = sc.next();
        System.out.println("Your Name is " + name);
    }

}

Using popupFetchListener to execute method on popup launch in Oracle ADF

Everyone must have used ADF Faces popup component , this is one of most used container to show information on top of page
In this post i am talking about popup fetch event suppose we have to perform some operation before opening popup like filtering data inside popup . We can do this by capturing popup fetch event, if you have checked af:popUp documentation then you must have seen concept of popupFetchListener

From Docs-
The PopupFetchEvent is one of two server-side popup events but doesn't have a corresponding client event. The popup fetch event is invoked during content delivery. This means that the event will only queue for popups that have a contentDelivery type of lazy or lazyUncached. Another caveat is that the event will only work when the launch id is set. This is automatically handled by the af:showPopupBehavior but must be provided as a popup hint if programmatically shown.

So here we will see -

How to use popupFetchListener to filter data inside popup ?
How to execute some operation before opening popup ?
How to call AMImpl method before launching popup?

ADF Basics: Call PL/SQL Stored function in ADF Application

This post is about calling stored function in ADF Application , a very basic requirement. Many times we need to call a PL/SQL function in ADF app for any specific requirement.
In this post i am discussing same so for that i have created a PL/SQL function that takes EmployeeId as input parameter and return it's Employees Name (Using Oracle HR Schema)

CREATE OR REPLACE FUNCTION FN_GET_EMPNAME(EMP_NO NUMBER)
RETURN VARCHAR2 IS
   EMP_NAME VARCHAR2(50) := 'N';
BEGIN
   SELECT FIRST_NAME||' '||LAST_NAME into EMP_NAME
   FROM EMPLOYEES WHERE EMPLOYEE_ID=EMP_NO;
   
   RETURN EMP_NAME;
END;

Jdeveloper installation folder size increasing beyond limit , Reason was hprof (Heap Profiling) files

Recently i faced a problem, i was lacking space on my C drive so  checked all directories and found that the size of Jdeveloper 12.1.3 installation folder Oracle-->Middleware  was approx 30 GB . This is not expected as Jdev. takes approx 1.5 to 2 GB space only

Then i found some java_pidXXXX.hprof file that was taking lot of space in this folder

Apply ValueChangeListener to programmatically created ADF Faces components

Again a post in series of  Working with ADF Faces Components programmatically
Previously i have posted about Getting value , Applying Action Listener , Applying Client/Server Listener, Creating and applying client Attributes, Setting value expression , Applying Validation to programmatically created component
Now this post post is about applying Value Change Listener to a component that is created at run time
See how to do this (Jdev 12.1.3)-

• First created a FusionWebApplication and a page in viewController project
• Dropped a button on page , on this button action i will create an inputText programmatically and assign Value Change Listener method reference to it
• To create new inputText i have added following code (described in previous post)

Apply Validator to programmatically created ADF Faces components

Again a post in series of  Working with ADF Faces Components programmatically
Previously i have posted about Getting value , Applying Action Listener , Applying Client/Server Listener, Creating and applying client Attributes, Setting value expression  to programmatically created component
Now this post post is about applying Validator to a component that is created at run time
See how to do this (Jdev 12.1.3)-

• First created a FusionWebApplication and a page in viewController project
• Dropped a button on page , on this button action i will create an inputText programmatically and assign validator method reference to it
• To create new inputText i have added following code (described in previous post)

ADF Basics: Using setPropertyListener to set value in memory scope variables

Soemtimes we need to set a value in memory scope variable on some event
In ADF af:setPropertyListener does this for you declaratively

The setPropertyListener tag provides a declarative syntax for assigning values when an event fires. The setPropertyListener implements the listener interface for a variety of events, to indicate which event type it should listen for set the 'type' attribute.

Read more about <af:setPropertyListener>

Facebook, Twitter, Google - Create large share buttons using JavaScript

This post is not like my other posts (ADF & Java), It is about creating custom large share buttons for Facebook, Twitter and Google+
Actually this share functionality of social networking sites (Facebook, Twitter, Google+ etc) works on a particular url pattern

Let's take example of Facebook , to share any url on Facebook just pass that url as a parameter in this url
http://www.facebook.com/share.php?u=url
See when i open this url on browser (I have passed www.awasthiashish.com in url parameter)
http://www.facebook.com/share.php?u=www.awasthiashish.com , it shows standard Facebook share page