package com.etown.util;
import java.util.Enumeration;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServlet;
import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import com.etown.dao.DBPool;
import com.etown.lucene.FileScheduler;
import com.etown.lucene.FileSchedulerTask;
import com.etown.lucene.TimeStep;
/**
* 系统参数初始化Servlet
* 系统启动时会自动执行此Servlet的init方法
* @author 大漠穷秋
*/
@SuppressWarnings("serial")
public class EnvInitServlet extends HttpServlet {
private String webRootDir;
public static final String WEB_HOME = "web.home";
private static Logger log = Logger.getLogger(EnvInitServlet.class);
//设置日志记录跟踪器
public static Logger etownlogger = Logger.getLogger("stdout");//设置事件日志记录器
public void init() {
//解析应用根目录
parsewebRootDir();
//初始化Log4j日志
configLog4j();
//加载配置的系统参数
loadProperties();
//初始化数据库连接
initDBConn();
//初始化Lucene相关
monitorLuceneTxTFile();
}
/**
* 解析应用根目录
*
*/
private void parsewebRootDir() {
webRootDir = getServletContext().getRealPath("/");
System.setProperty(WEB_HOME, webRootDir);
}
/**
* 初始化Log4j日志
*
*/
private void configLog4j() {
String file = getInitParameter("log4j-init-file");
if (file != null) {
PropertyConfigurator.configure(webRootDir + file);
}
etownlogger = Logger.getLogger("stdout");
}
/**
*加载配置的系统参数
*
*/
private void loadProperties() {
ServletContext sc = this.getServletContext();
Enumeration e = sc.getInitParameterNames();
while (e.hasMoreElements()) {
String name = (String) e.nextElement();
String value = sc.getInitParameter(name);
System.setProperty(name, value);
log.info("添加系统参数名：" + name + "；参数值：" + value);
}
}
/**
* 初始化数据库连接
*
*/
private void initDBConn(){
DBPool.initConn(10);
}
/**
* 初始化Lucene引擎
*
*/
private void monitorLuceneTxTFile() {
//创建local_files文件监控任务
FileSchedulerTask fileSchedulerTask = new FileSchedulerTask(System
.getProperty("web.home")
+ System.getProperty("luceneLocalFolder"));
FileScheduler fileScheduler = new FileScheduler();
fileScheduler.schedule(fileSchedulerTask, new TimeStep());
}
}