For this I am using a java project with an ant file.

In my previous post I have detailed how to create ant hello world ant project.

I will use the same project here as well.

To create an executable jar file one need to edit projectBuilder.xml file.

So new projectBuilder.xml will looks like as below:

<?xml version="1.0" encoding="UTF-8"?>
<project name="AntProject" default="makejar" basedir=".">
<target name="makejar" description="Create a jar for the HW project">
<jar jarfile="HelloWorld.jar" includes="*.class" basedir="bin">
 <manifest>
 <attribute name="Main-Class" value="Main" />
 </manifest>
</jar>
</target>
</project>

Now run this ant file right click and run as Ant build.

Here I added a manifest tag with Main-class in jar tag.

This will set Main-Class in MANIFEST.MF

One can see the Manidest.MF by double click on HelloWorld.jar–>META-INF–>Manifest.MF As below:

Manifest-Version: 1.0

Ant-Version: Apache Ant 1.8.3

Created-By: 1.6.0_18-b07 (Sun Microsystems Inc.)

Main-Class: Main

One can also execute HelloWorld.jar on the command line as below.

This article is about how to start with ant tool. In this article I am going to create a Java Project and will create a jar file  of  java project using ant file.

In my previous post I have written about Eclipse | Hello World Java Project. I am  going to use same project and here also.

So my project structure will be as below:

Now to introduce ant file create a xml file using File–> New wizard and  name it projectBuilder.xml and place below code in xml file.

<project name="AntProject" default="makejar" basedir=".">
 <target name ="makejar" description="Create a jar for the ant project">
   <jar jarfile="HelloWorld.jar" includes="*.class" basedir="bin"/>
 </target>
</project>

  
Now right click on projectbuilder.xml select run as ant file. As the execution stops refresh the ant project.
A jar file named HelloWorld.jar will be in root project folder.

Prerequisite: Java must be installed.

In eclipse click on File -> New Project -> Java Project (as below)

It will open new java project wizard. (as below)

Enter a valid a project name in project name text box. Click next (or one can directly click on finish also)

Click on finish on next wizard page. (as below)

Now create a new java class in src package. 

On click of class will open a page for new class entry. Enter valid class name in name text box.

Also check main method check box as below. It will create a main method in class itself.

Now a add sys out statement in main method. (as below)

public class Main {
 public static void main(String[] args) {
 System.out.println("Hello World !!!");
 }
}

Noe one can run this as java application. (as below)

It will first compile and then run TestProject application.

On console it will print result. ‘Hello World !!!’

In HTML, hyperlink can be used by using <a> tag. Hyperlink is a group of word which can be clicked and get executed by opening clicked link.

Syntax of HTML hyperlink is as below: 

<a href="http://www.coffeewithcode.com/">Visit coffeewithcode</a>

Here ‘Visit coffeewithcode’ text can be clicked together and for this clickable text destination is http://www.coffeewithcode.com which is described in href attribute of <a> tag. So on click of Visit coffeewithcode it will open http://www coffeewithcode.com in same tab / browser.

In case if once required to open hyperlink in new tab / browser window then also it is possible.

For this one need to add new attribute target and value for this attribute is “_blank”.

So new syntax will be as below:

<a href="http://www.coffeewithcode.com/" target="_blank">Visit coffeewithcode</a>

Now on click on ‘Visit coffeewithcode’ will open http://www coffeewithcode.com in new tab / windows.

Execute following command in terminal to complete installation of oracle OCI8 extension in php.ini.

1) Get Oracle repository from this link.

     http://oss.oracle.com/debian unstable main non-free

2) Make sure to add the proper GPG key for the repository.

      sudo wget http://oss.oracle.com/el4/RPM-GPG-KEY-oracle -O- | sudo apt-key add -

3) Get all the packages for PHP5, Oracle, and Apache2 server.

       sudo apt-get update

       sudo apt-get install build-essential

       sudo apt-get install php5-dev

       sudo apt-get install php5

       sudo apt-get install php-pear

       sudo apt-get install oracle-xe-client

       sudo apt-get install apache2

       sudo apt-get install libapache2-mod-php5

4) Install Oracle OCI8 library.

       pecl install oci8

5) This will ask for your home directory. At the time of installing the Oracle client was installed in following path :

     /usr/lib/oracle/xe/app/oracle/product/10.2.0/client/

6) When the installation is complete you will need to add the extension information to both instance of php.ini.

     echo “extension=oci8.so” >> /etc/php5/cli/php.ini

     echo “extension=oci8.so” >> /etc/php5/apache2/php.ini

7) Restart Apache2 server.

    /etc/init.d/apache2 restart

Now make a simple test to find oracle connectivity with php.

Make test.php and paste following  code.

<?php
//oracle connection variables
$ora_user = 'USER_NAME'; //username
$ora_pass = 'PASSWORD'; //password
$ora_host = 'SERVER_IP_OF_ORACLE"'; //host name or server ip address
$ora_db = ‘DATABASE_NAME'; //database name
 
$conn = oci_connect($ora_user,$ora_pass,'//'.$ora_host.'/'.$ora_db);
 
// error handling
if (!ora_conn){ // if variable $conn fails to connect
// do the following if it fails
$ora_conn_erno = oci_error(); // insert oci_error() function into variable
echo ($ora_conn_erno['message']."\n"); // print the $ora_conn_erno variable/oci_error() function selecting only the message (human readable)
oci_close($conn); // close the connection just in case php doesn't close it
} else {
// if it doesn't fail it will proceed with the rest of the script
echo "Connection Successful\n"; //echo message if connection does not error
oci_close($conn); // close the connection
}
?>

1.) How to get number of  twitter followers.

fnction get_followers($twitter_id){
    $xml=file_get_contents('http://twitter.com/users/show.xml?screen_name='.$twitter_id);
    if (preg_match('/followers_count>(.*)</',$xml,$match)!=0) {
        $tw['count'] = $match[1];
    }
 
    return $tw['count'];
}

Now call this function with this code

$followers = get_followers(‘vimalm4u’);
echo “You have”.$followers.”followers!”;

2.) Get number of retweets for a specific page.

       Function will get the number of  retweets of the url passed as a parameter

function rtweetCount($url) {
   $content = file_get_contents("http://api.tweetmeme.com/url_info?url=".$url);
   $element = new SimpleXmlElement($content);
   $retweets = $element->story->url_count;
   if($retweets){
       return $retweets;
   } else {
       return 0;
   }
}
 
echo rtweetCount('http://www.coffeewithcode.com');

3) Shorten urls for Twitter

      As we know, we can’t tweets messages which are longer than 140 characters. To avoid this problem, you have to use an url shortener.

function getTinyUrl($url) {
   return file_get_contents("http://tinyurl.com/api-create.php?url=".$url);
}

Below is  java file.In which there is a main method.In this main method a script engine instance is taken.This script engine is already with jdk.For this one need not to add any other jar file.

import java.io.FileNotFoundException;
import java.io.FileReader;
 
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
 
public class Driver {
 
/**
* @param args
* @throws FileNotFoundException
*/
public static void main(String[] args) throws FileNotFoundException {
try {
/**
* To call a anonymous function from java script file
*/
ScriptEngine engine = new ScriptEngineManager()
.getEngineByName("javascript");
FileReader fr = new FileReader("src/js/MySpec.js");
engine.eval(fr);
 
} catch (ScriptException scrEx) {
scrEx.printStackTrace();
}
}
}

Below is the java script file with an anonymous fuction.This function is to print on the console.

// java script anonumous function
(function() {
 print('Hello world');
})();

Below is the folder structure of the project.

Folder Structure

Your Suggestions Are Always Welcomed.

While creating any new hibernate related file this plugin will help you by configuring the parameter which are necessary to create that file.

Below are the suggestion by hibernate plugin in the new wizards.

Hibernate plugin in eclipse

On click of any of four link it will start a new wizard.New wizard will ask for the required input parameter to build respective file.By using this wizard one need not to create specific file manually and do entries.

While working with hibernate mapping file hibernate plugin also help with suggestions of bean properties.

There may many other features of hibernate plugin which are helpful at the time of development.As I came across I will share them on this blog.

Above are the benefits at the time of the development.Hibernate plugins also provide a complete hibernate tutorial inside the eclipse with examples.

To see the hibernate tutorial inside the eclipse go to

• Help
• Help Contents

It will open a new windows.This contains the guide to develop hibernate application with examples.

Here below is the screenshot of newly opened window:

Hibernate plugin in eclipse

Your Suggestions Are Always Welcomed.

To install hibernate plugin / tools in eclipse one need to follow below steps.

• Go to help menu in eclipse
• Install new software (This will vary in different eclipse version)

Hibernate plugin installation in eclipse

• Click on Add site

Hibernate plugin installation in eclipse

• In location text box paste following url   

             http://download.jboss.org/jbosstools/updates/stable/

Hibernate plugin installation in eclipse

• It will show all the jBoss software to install.If you only want to install hibernate plugin then in search text box type hibernate.It will filter out only hibernate related plugins.

Hibernate plugin installation in eclipse

• Click next to install  (May be it will take some time to install the plugin (I f you are facing error in installing the hibernate plugin at this stage then there is a check box in above screen named contact all update site during install to find required software, please check it. It will resolve all the resolve required dependency.)

• Once installed it will ask to restart the eclipse.
• After restart one can verify it.

• To verify:
• Go to windows
• Open perspective
• In other option you can see the hibernate

Hibernate plugin installation in eclipse

This plugin is helpful while creating the hibernate file in new wizard.

Hibernate plugin installation in eclipse

Your Suggestions Are Always Welcomed.

Here is the Student bean class with id and name properties with annotations. 

package beans;
 
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
 
@Entity
@Table(name="student_master")
public class Student  {
 
 @Id
 @GeneratedValue
 @Column(name="stud_id")
 private long id;
 
 @Column(name="name")
 private String name;
 
 /**
  * getters and setters
  * @return
  */
 public long getId() {
 return id;
 }
 public void setId(long id) {
 this.id = id;
 }
 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
}

Here is the hibernate.cfg.xml file. For this example mysql used as the data base.

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 
<hibernate-configuration>
 <session-factory>
 <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
 <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test</property>
 <property name="hibernate.connection.username">root</property>
 <property name="hibernate.connection.password">root</property>
 <property name="show_sql">true</property>
 <property name="hibernate.hbm2ddl.auto">create</property>
 <property name="dialect">org.hibernate.dialect.MySQLDialect</property>
 
  <mapping class="beans.Student"/>
 </session-factory>
</hibernate-configuration>

Here is the Driver class. In the driver class we have created an instance of student and saved to the database.

package driver;
 
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
 
import beans.Student;
 
public class Driver {
 /**
  * main method
  */
 public static void main(String[] args) {
 Session session = null;
 try {
 //getting session factory instance
 SessionFactory sessionFactory = new Configuration().configure(
 "hibernate/hibernate.cfg.xml").buildSessionFactory();
 session = sessionFactory.openSession();
 session.beginTransaction();
 //student instance
 Student student = new Student();
 student.setName("Sanjay ");
 session.save(student);
 session.getTransaction().commit();
 } catch (Exception e) {
 System.out.println(e.getMessage());
 } finally {
 session.flush();
 session.close();
 }
 }
}

Your Suggestions Are Always Welcomed.