JAVA BY RAMAKRISHNA: November 2013

Friday, 8 November 2013

C3PO Connection Pooling

=>We can use C3PO Connection pooling in standalone applications or web based application to connect with database

=>Here i am using mysql db
=>First download c3po related jars or add dependencies for maven
=>Write the code to create connection pooling

pom.xml for maven dependencies:

<dependencies>

<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>

</dependencies>

Program:

import java.beans.PropertyVetoException;
import java.sql.Connection;
import java.sql.SQLException;

import com.mchange.v2.c3p0.ComboPooledDataSource;

/**
*
* @author ramakrishna.v
*
*/
public class C3POWithMySQLExample {

public static void main(String[] args) throws SQLException {

ComboPooledDataSource cpds = new ComboPooledDataSource();
//loads the mysql jdbc driver
try {
cpds.setDriverClass("com.mysql.jdbc.Driver");
} catch (PropertyVetoException e) {
e.printStackTrace();
}
cpds.setJdbcUrl("jdbc:mysql://localhost:3306/ramakrishna");
cpds.setUser("root");
cpds.setPassword("root");

Connection con=cpds.getConnection();
//System.out.println(con);

System.out.println("MinPoolSize:::"+cpds.getMinPoolSize());
System.out.println("MaxPoolSize:::"+cpds.getMaxPoolSize());
System.out.println("InitialSize:::"+cpds.getInitialPoolSize());
System.out.println("=================================================");

cpds.setMinPoolSize(5);
cpds.setMaxPoolSize(25);
cpds.setInitialPoolSize(6);
cpds.setAcquireIncrement(5);

System.out.println("MinPoolSize:::"+cpds.getMinPoolSize());
System.out.println("MaxPoolSize:::"+cpds.getMaxPoolSize());
System.out.println("InitialSize:::"+cpds.getInitialPoolSize());

}

}

Output:

MinPoolSize:::3
MaxPoolSize:::15
InitialSize:::3
=================================================
MinPoolSize:::5
MaxPoolSize:::25
InitialSize:::6

DBCP Connection Pooling

=>We can use DBCPConnection pooling in standalone applications or web based application to connect with database
=>Here i am using mysql db
=>First download dbcp related jars/add dependencies for maven
=>Write the code to create connection pooling

pom.xml for Maven Dependencies

<dependencies>

<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.2</version>
</dependency>

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.26</version>
</dependency>

</dependencies>

Program:

import java.sql.*;
import org.apache.commons.dbcp.BasicDataSource;

/**
*
* @author ramakrishna.v
*
*/
public class DBCPWithMySQLExample {

public static void main(String[] args) {

BasicDataSource bds = new BasicDataSource();
bds.setDriverClassName("com.mysql.jdbc.Driver");
bds.setUrl("jdbc:mysql://localhost:3306/ramakrishna");
bds.setUsername("root");
bds.setPassword("root");

try {
Connection con = bds.getConnection();

System.out.println("MaxActive:::::::::"+bds.getMaxActive());
System.out.println("MaxIdle:::::::::::"+bds.getMaxIdle());
System.out.println("Initial Size:::::::::::"+bds.getInitialSize());
System.out.println("Present no.of Active::::::::"+bds.getNumActive());
System.out.println("Present Idle:::::::::::"+bds.getNumIdle());

bds.setMaxActive(25);
bds.setMaxIdle(10);
bds.setInitialSize(5);

System.out.println("MaxActive:::::::::"+bds.getMaxActive());
System.out.println("MaxIdle:::::::::::"+bds.getMaxIdle());
System.out.println("Initial Size:::::::::::"+bds.getInitialSize());
System.out.println("Present no.of Active::::::::"+bds.getNumActive());
System.out.println("Present Idle:::::::::::"+bds.getNumIdle());

con.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}

Output:

MaxActive:::::::::8
MaxIdle:::::::::::8
Initial Size:::::::::::0
Present no.of Active::::::::1
Present Idle:::::::::::0
MaxActive:::::::::25
MaxIdle:::::::::::10
Initial Size:::::::::::5
Present no.of Active::::::::1
Present Idle:::::::::::0

Monday, 4 November 2013

Get selected table data using JQuery deligate method

=>Just Use jquery.js fiel,And use this code

=>Here no need to maintain tr id.

=>After double click on any row ,data will be display in text boxes.

<html>
<head>
<script src="jquery.js"></script>
<script>
$(document).ready(function() {
$("#mytable").delegate("tr",'click',function() {
$(this).find("td").each(function(i){
var value=$(this).text();
$("#"+i).val(value);
});
});

});
</script>
</head>
<body>
<input type="text" id="0"/>
<input type="text" id="1"/></br></br>
<table id="mytable" border="2">
<tr>
<td>1000</td><td>2000</td>
</tr>
<tr>
<td>3000</td><td>4000</td>
</tr>
<tr>
<td>5000</td><td>6000</td>
</tr>
<tr>
<td>7000</td><td>8000</td>
</tr>
</table>
</body>
</html>

Get Selected table data using JQuery

=>Just use jquery.js file,And use this code

=>After double click on any row,Data will be display in text boxes.

<html>
<head>
<script src="jquery.js"></script>
<script>
$(document).ready(function() {

$("#mytable tr").dblclick(function() {
var trid=$(this).attr("id");

$("#"+trid+" td").each(function(i) {
var value=$(this).text();
$("#"+i).val(value);
});
});
});
</script>
</head>
<body>
<input type="text" id="0"/>
<input type="text" id="1"/></br></br>
<table id="mytable" border="2">
<tr id="tr1">
<td>1000</td><td>2000</td>
</tr>
<tr id="tr2">
<td>3000</td><td>4000</td>
</tr>
<tr id="tr3">
<td>5000</td><td>6000</td>
</tr>
<tr id="tr4">
<td>7000</td><td>8000</td>
</tr>
</table>
</body>
</html>

Output:

Friday, 1 November 2013

Jackrabbit Repository jar,war download

Jackrabbit standalone-2.6.4.jar download.Click below link

http://jackrabbit.apache.org/downloads.html#v2.6

=>Use this command to create Jackrabbit repository and start that

=>java -jar jackrabbit-standalone-2.6.4.jar -port 2629

=>We can use any port(Without conflicts to other services)

=>When we run the above command jackrabbit repository file will create,so that we can store files,and we can download files from jackrabbit.

=>To see how the files are storing into jackrabbit we can use jackrabbit explorer war file

Jackrabbit war download.Click below link

https://code.google.com/p/jackrabbitexplorer/downloads/list

=>After download this war,just deploy into any server(Tomcat or other) .

=>Access the jackrabbit explorer as follows

=>http://localhost:8080/jackrabbitexplorer/

=>Default user name and passwords are admin,admin

=>Just change port number of jackrabbit,what we assigned (2629) and login,It will open jackrabbit explorer

SOAP WebService Using Apache CXF Example with Service and Client (Bottom To Top Approach)

=>First Develope One interface.Develope your own methods.

=>These methods i want to expose as a FirstService

=>Just Create Normal Java interface with @WebService Annotation only

package com.service;

import javax.jws.WebService;

@WebService
public interface FirstService {

public String methodOne();

public int methodTwo();

}

=>Provide the implementation for Above Interface

=>Just add extra annotation @WebService(endpointInterface="com.service.FirstService")
End point means interface name with package only

package com.service.impl;

import javax.jws.WebService;

@WebService(endpointInterface="com.service.FirstService")
public class FirstServiceImpl implements FirstService {

public FirstServiceImpl() {
System.out.println("+++++From FirstServiceImpl+++");
}

@Override
public String methodOne() {
System.out.println("+++From FirstServiceImpl methodOne()+++");
return "k fine";
}

@Override
public int methodTwo() {
System.out.println("+++From FirstServiceImpl methodTwo()+++");
return 100;
}
}

=>Add Maven Dependencies for Spring with Apache CFX

<id>sourceforge</id>

<url>http://oss.sonatype.org/content/groups/sourceforge/</url>

</releases>

</snapshots>

</repository>

</repositories>

<cxf.version>2.7.2</cxf.version>

<org.springframework.version>3.0.5.RELEASE</org.springframework.version>

</properties>

<groupId>org.apache.cxf</groupId>

<artifactId>cxf-rt-frontend-jaxws</artifactId>