quartz cron 값 변경

쿼츠를 이용하여 스케줄링 할 때 스케줄링 시간을 설정/변경 하고 싶을 때 아래와 같은 방법을 사용한다.

MainClass

public static void main(String[] args) {       ...       String cronStr = CommonUtil.getPropVal("MAIL.CRONTAB");  // properties 파일에서 읽기       SchedulerCronTrigger.getInstance(cronStr);       ... }

cronTriger class (singleton 으로 작성했다)

public class SchedulerCronTrigger { private static Logger logger = Logger.getLogger(SchedulerCronTrigger.class); private static volatile SchedulerCronTrigger INSTANCE; private SchedulerFactory schedFact = null; private Scheduler sched = null; private SchedulerCronTrigger() {} public static SchedulerCronTrigger getInstance(String cronStr) { if( INSTANCE == null ) { synchronized (SchedulerCronTrigger.class)  { if( INSTANCE == null) { INSTANCE = new SchedulerCronTrigger(); INSTANCE.initInstance(cronStr); } } } return INSTANCE; } private void initInstance(String cronStr) { try  { if(null == schedFact) { logger.debug("Create scheduler"); // 스케쥴 생성후 시작 schedFact = new StdSchedulerFactory(); sched = schedFact.getScheduler(); if(false == sched.isStarted()) { sched.start(); logger.debug("Start scheduler with ["+cronStr+"]"); JobDetail mailSender =                                                           new JobDetail("job", "mailSender", SendMail.class); CronTrigger trigger = null; try { trigger = new CronTrigger("trigger", "mailSender", cronStr); } catch(Exception e) { trigger = new CronTrigger("trigger", "mailSender",                                                             "0/10 * * * * ?");  // default 10초 마다 } sched.scheduleJob(mailSender, trigger); } } }  catch (Exception e)  { e.printStackTrace(); } } }

실제 스케줄링 작업 (메일 전송)

public class SendMail implements Job{ private Logger logger = Logger.getLogger(SendMail.class); private MailService mailService; public SendMail() { ApplicationContext context =                         new ClassPathXmlApplicationContext("framework/applicationContext.xml"); mailService = (MailService) context.getBean("mailService"); } @Override public void execute(JobExecutionContext arg0) throws JobExecutionException  { try { logger.debug("cheduler job execute"); mailService.sendMail(); } catch(Exception e) { logger.error("scheduler job execute exception"); logger.error(e.getMessage()); } } }