Configuring log4j property file to store in mysql Database

Question

It\'s been a while that I began with log4j; pretty cool logging framework. I\'ve done other type of logging like Console and File Logging. So trying for DB Adapters with mys

Answer 1

If you are using mysql. create a file log4j.properties. This worked for me. Put this at the root folder of you application. i.e root of all packages. I also do have a table logs with fields id,date,user, message and class.

log4j.rootLogger=DEBUG,DB
log4j.appender.DB=org.apache.log4j.jdbc.JDBCAppender
log4j.appender.DB.URL=jdbc:mysql://localhost:3306/test
log4j.appender.DB.user=root
log4j.appender.DB.password=root
log4j.appender.DB.sql=INSERT INTO logs(date, user, message,class) VALUES ('%d{yyyy-MM-dd HH:mm:ss}', '%X{User}','%m','%c')
log4j.appender.DB.layout=org.apache.log4j.PatternLayout
log4j.appender.CA.layout.ConversionPattern=INSERT INTO logs (date, user,message,class) VALUES ('%d{yyyy-MM-dd HH:mm:ss}', '%X{User}','%m','%c')

log4j.category.ke.co=ERROR
log4j.category.ke.co.appender-ref=DB

Then use it as follows.

package com.zeddarn;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import org.apache.log4j.Logger;
import org.apache.log4j.MDC;

public class MySQLDatabaseConnector {

static ThreadLocal<Connection> connection = new ThreadLocal<Connection>();
private static Logger logger = Logger.getLogger(MySQLDatabaseConnector.class);

public static Connection getDBConnection() {

    //check if a mysql connection already exits. This is to avoid reconnecting 
   if (connection.get() == null) {
        try {
            //loading the mysql driver. This means you also have to add mysql libary. You can add manually or via maven
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            //do something to deal with the error of missing mysql driver e.g notification to the user.
             MDC.put("User", "loggeduser");
            logger.error(e.getMessage());
            MDC.getContext().clear();
        }
        try {

            connection.set(DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root"));

        } catch (SQLException e) {               
            MDC.put("User", "loggeduser");
            logger.error(e.getMessage());
            MDC.getContext().clear();
      }
    }
    return connection.get();
}

public static void main(String args[]) {
      MDC.put("User", "loggeduser");
            logger.error("message from exception.getMessage() method");
            MDC.getContext().clear();
}

}