Use SocketAppender to write log on other machine

In this tutorial I will explain how can we write log from one system to other system,
For this purpose I will use SocketAppender of Log4j.For more info regard SocketAppender you can go through this link
https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/net/SocketAppender.html

For Demonstration I will use two log4j configuration file and two java class
one for client machine(localHost) and other for server or remote machine


=========  client log configuration File (client.xml)=========


<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

  <appender name="socket" class="org.apache.log4j.net.SocketAppender">
  <param name="Port" value="1342"/>
  <param name="RemoteHost" value="192.000.000.00"/>
  <param name="ReconnectionDelay" value="5000"/>
  <param name="LocationInfo" value="true"/>
  </appender>
 <root>
    <param name="level" value="INFO"/>
    <appender-ref ref="socket" />
  </root>

</log4j:configuration>

class = The SocketAppender class
RemoteHost =  Ip of that machine where you want to write your log
Port = port number of Remote machine

=========  Server log configuration File (server.xml)=========

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

  <appender name="rolling" class="org.apache.log4j.DailyRollingFileAppender">
        <param name="file"   value="C:/Test/LogFile.log" />
        <param name="datePattern" value="'.'yyyy-MM-dd-HH " />
        <param name="append" value="true" />
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d [%t] %-5p %C{6} (%F:%L) - %m%n"/>
        </layout>
    </appender>
<root> 
    <param name="level" value="INFO"/>
    <appender-ref ref="rolling" /> 
  </root>
</log4j:configuration>

Class = you can use any log4j class as per your requirement I am using  DailyRollingFileAppender.


========= Client Java class =========

package com.amit.blog.clientlogging;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.log4j.xml.DOMConfigurator;

/**
 * This class use to logging on remote server on xml defined port.
*/
public class Client
{
    private static Log logger = LogFactory.getLog(Client.class);
    public static void main(String[] a)
    {
      try
      {
        DOMConfigurator.configure("client.xml");
         for(int i=0;i<10;i++)
          {
              logger.info("writing on remote server !");      
          }
      }
       catch (Exception e)
       {
           logger.info("Failed to write on remote server");
       }
    }
}


========= Server Java class =========

package com.amit.blog.serverlogging;

import org.apache.log4j.net.SimpleSocketServer;
/**
 * This class use to receive the log entries from client on port open by method.
 */

public class Server
{
  public static void main(String[] args)
  {
    try
       {
        String defaultPort="1342"; //Need to mention one port to open for writing

         /** This class is provided by log4j
         * It takes two parameters, namely the port to start the
         * server on and the server side log4j configuration file.
         */
        String[] arguments = {defaultPort, "server.xml"};
        SimpleSocketServer.main(arguments);
       }
       catch (Exception ex)
        {
          System.out.println(ex.getMessage());
        }
   }
}



I think It will help you to manage your log.