package com.vci.common.log;

import java.io.File;
import java.io.FileInputStream;
import java.net.URL;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.config.ConfigurationSource;
import org.apache.logging.log4j.core.config.Configurator;
//import org.apache.logging.log4j.PropertyConfigurator;

/**
 * <p>Title: </p>
 * <p>Description: use log4j to note some meaningful info.
 * the info has four kinds: INFO, DEBUG, WARN and ERROR.
 * it display log infos in console and save them into a
 * log file. Programeers can lookup useful info from them.
 * And programeers can set the level in 
 * properties/ServerWithLog4j.properties to decide which info
 * they want to save.</p>
 */
public class ServerWithLog4j {
	
	private static String log4j_properties_dev = "properties/ServerLog4j2.xml";
	private static String log4j_properties = "/" + log4j_properties_dev;
//	private static String log4j_properties_file_path_for_developer = "properties/ServerWithLog4j.properties";
//	private static String log4j_properties_file_path = "/" + log4j_properties_file_path_for_developer;
	private static URL log4j_properties_url = null;
	
	
	public static Logger logger = null;//LogManager.getLogger("ServerLog");
	
	static {
		try {
			File file =  new File(log4j_properties_dev);
			
			System.out.println("=====log4j_properties_dev = " + file.getAbsolutePath());
			
			String loadFrom = "";
			
			if(file.exists()){
				loadFrom = file.getAbsolutePath();
			} else {
				log4j_properties_url = ServerWithLog4j.class.getResource(log4j_properties);
				loadFrom = log4j_properties_url.toString();
			}
			
			ConfigurationSource source = new ConfigurationSource(new FileInputStream(loadFrom));
			Configurator.initialize(null, source);
			
			logger = LogManager.getLogger("ServerLog");
			
			logger.debug("log4j init completed. use properties file is " + loadFrom);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
}