package com.vci.dbsync.log;

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

import org.apache.log4j.Logger;
import org.apache.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 SyncLog {
	private static String log4j_properties_file_path_for_developer = "properties/dbSynclog4j.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 = Logger.getLogger("SyncLog");
	
	static {
		File file =  new File(log4j_properties_file_path_for_developer);
		//log4j_properties_url = SyncLog.class.getResource(log4j_properties_file_path);
		String loadFrom = "";
		
		if(file.exists()){
			loadFrom = file.getAbsolutePath();
			PropertyConfigurator.configure(file.getAbsolutePath());
		} else {
			log4j_properties_url = SyncLog.class.getResource(log4j_properties_file_path);
			loadFrom = log4j_properties_url.toString();
			PropertyConfigurator.configure(log4j_properties_url);
		}
		
		logger.debug("log4j init completed. use properties file is " + loadFrom);
	}
	
}