quartz入门
quartz入门
Quartz简介及应用场景
1. Quartz介绍
任务调度框架“Quartz”是OpenSymphony开源组织在Job scheduling领域又一个开源项目，是完全由java开发的一个开源的任务日程管理系统，
“任务进度管理器”就是一个在预先确定（被纳入日程）的时间到达时，负责执行（或者通知）其他软件组件的系统。
简单来说就是实现“计划(或定时)任务”的系统，例如：订单下单后未付款，15分钟后自动撤消订单，并自动解锁锁定的商品
2. Quartz的触发器
触发器用来告诉调度程序作业什么时候触发。框架提供了5种触发器类型，但两个最常用的SimpleTrigger和CronTrigger。
五种类型的Trigger(定时器)
SimpleTrigger，CronTirgger，DateIntervalTrigger，NthIncludedDayTrigger和Calendar类（ org.quartz.Calendar）。
场景：
SimpleTrigger：执行N次，重复N次
CronTrigger：几秒 几分 几时 哪日 哪月 哪周 哪年，执行
3. 存储方式
RAMJobStore(内存作业存储类型)和JDBCJobStore(数据库作业存储类型)，两种方式对比如下：
优点 缺点
RAMJobStore 不要外部数据库，配置容易，运行速度快 因为调度程序信息是存储在被分配给JVM的内存里面，
所以，当应用程序停止运行时，所有调度信息将被丢失。
另外因为存储到JVM内存里面，所以可以存储多少个Job和Trigger将会受到限制
JDBCJobStor 支持集群，因为所有的任务信息都会保存 运行速度的快慢取决与连接数据库的快慢
到数据库中，可以控制事物，还有就是如
果应用服务器关闭或者重启，任务信息都
不会丢失，并且可以恢复因服务器关闭或
者重启而导致执行失败的任务
图解quartz工作流程
quartz相关表达式
在线生成表达式网址：http://cron.qqe2.com/
所需pom依赖
org.quartz-scheduler
quartz
2.2.1
org.springframework
spring-aspects
Quartz简单触发器 SimpleTrigger
RamJob
package com.xzy.quart01.job;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
/**
* @author XZY
* @site www.Xzy.com
* @company
* @create 2019-11-14 16:43
*/
public class RamJob implements Job {
@Override
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
System.out.println("此处为quartz定时任务执行的业务内容。。。");
}
}
Demo1
package com.xzy.quart01.demo;
import com.xzy.quart01.job.RamJob;
import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import static org.quartz.JobBuilder.newJob;
/**
* @author XZY
* @site www.Xzy.com
* @company
* @create 2019-11-14 16:45
*/
public class Demo1 {
public static void main(String[] args) throws SchedulerException {
SchedulerFactory factory = new StdSchedulerFactory();
Scheduler scheduler = factory.getScheduler();
JobDetail jobDetail = newJob(RamJob.class)
.withIdentity("job1","group1")
.withDescription("this is a job")
.build();
Trigger trigger = (Trigger)TriggerBuilder.newTrigger()
//(3,6)重复3次，时隔6秒
.withSchedule(SimpleScheduleBuilder.repeatSecondlyForTotalCount(3,6))
.withIdentity("trigger1","group1")
.withDescription("this is a trigger")
.build();
scheduler.scheduleJob(jobDetail,trigger);
scheduler.start();
}
}
Quartz表达式触发器CronTirgger
Demo2
package com.xzy.quart01.demo;
import com.xzy.quart01.job.RamJob;
import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import static org.quartz.JobBuilder.newJob;
/**
* @author XZY
* @site www.Xzy.com
* @company
* @create 2019-11-14 16:49
*
* 表达式触发器（定时定点，无限循环执行某一代码）
*/
public class Demo2 {
public static void main(String[] args) throws SchedulerException {
SchedulerFactory factory = new StdSchedulerFactory();
Scheduler scheduler = factory.getScheduler();
JobDetail jobDetail = newJob(RamJob.class)
.withIdentity("job2","group2")
.withDescription("this is a job2")
.build();
Trigger trigger = (Trigger)TriggerBuilder.newTrigger()
//定点执行逻辑
// .withSchedule(CronScheduleBuilder.cronSchedule("0 9 17 * * ?"))
//定点执行逻辑
.withSchedule(CronScheduleBuilder.cronSchedule("0/6 * * * * ?"))
.withIdentity("trigger2","group2")
.withDescription("this is a trigger2")
.build();
scheduler.scheduleJob(jobDetail,trigger);
scheduler.start();
}
}
Quartz中参数传递
Demo3
package com.xzy.quart01.demo;
import com.xzy.quart01.job.RamJob;
import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import static org.quartz.JobBuilder.newJob;
/**
* @author XZY
* @site www.Xzy.com
* @company
* @create 2019-11-14 16:45
*/
public class Demo3 {
public static void main(String[] args) throws SchedulerException {
SchedulerFactory factory = new StdSchedulerFactory();
Scheduler scheduler = factory.getScheduler();
JobDetail jobDetail = newJob(RamJob.class)
.withIdentity("job1","group1")
.withDescription("this is a job3")
.usingJobData("name","xzy")
.build();
JobDataMap jobDataMap = jobDetail.getJobDataMap();
jobDataMap.put("job","java");
jobDataMap.put("level","javaxiaoxu");
Trigger trigger = (Trigger)TriggerBuilder.newTrigger()
.withSchedule(SimpleScheduleBuilder.repeatSecondlyForTotalCount(3,6))
.withIdentity("trigger1","group1")
.withDescription("this is a trigger3")
.build();
scheduler.scheduleJob(jobDetail,trigger);
scheduler.start();
}
}
package com.xzy.quart01.job;
import org.quartz.Job;
import org.quartz.JobDataMap;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
/**
* @author XZY
* @site www.Xzy.com
* @company
* @create 2019-11-14 16:43
*/
public class RamJob implements Job {
@Override
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
System.out.println("quartz定时任务~~~~~~~~~~~~~~~~~~~~~");
// JobDataMap jobDataMap = JobExecutionContext().getJobDataMap();
JobDataMap jobDataMap = jobExecutionContext.getJobDetail().getJobDataMap();
System.out.println(jobDataMap.get("name") + "" + jobDataMap.get("level") + "" + jobDataMap.get("job"));
}
}
Spring task Vs Quartz
Spring task
优点：无需整合spring，作业类中就可以调用业务service
缺点：单线程；不能做数据存储型的定时任务
Quartz
优点：多线程；可以做数据存储型的定时任务，维护性高；
缺点：需要整合spring，不能直接调用业务层service；
然后我们写个案例，在运行定时的时候写一个线程休眠，看看定时的时间会不会受到影响
SpringTask
package com.xzy.quart01.task;
import org.springframework.scheduling.annotation.Scheduled;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* @author XZY
* @site www.Xzy.com
* @company
* @create 2019-11-15 16:50
*/
public class SpringTask {
@Scheduled(cron = "0/10 * * * * ?")
public void xxx(){
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.err.println("spring Task..."+format.format(new Date()));
try {
Thread.sleep(20*1000);
System.out.println("处理大数据量的耗时操作~~~~~~~~~~");
//System.out.println("每十秒执行一次 spring task");
} catch (InterruptedException e) {
e.printStackTrace();
}
//System.out.println("10 9 8 7 6 5 4 3 2 1 ");
}
}
Quart01Application中添加注解@EnableScheduling
package com.xzy.quart01;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
@EnableScheduling
@SpringBootApplication
public class Quart01Application {
public static void main(String[] args) {
SpringApplication.run(Quart01Application.class, args);
}
}
Quartz
Demo4
package com.xzy.quart01.demo;
import com.xzy.quart01.job.RamJob;
import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import static org.quartz.JobBuilder.newJob;
/**
* @author XZY
* @site www.Xzy.com
* @company
* @create 2019-11-14 16:55
*
* 讲解简单触发器
*/
public class Demo4 {
public static void main(String[] args) throws SchedulerException {
SchedulerFactory factory = new StdSchedulerFactory();
Scheduler scheduler = factory.getScheduler();
JobDetail jobDetail = newJob(RamJob.class)
.withIdentity("job2","group2")
.withDescription("this is a job")
.build();
Trigger trigger = (Trigger)TriggerBuilder.newTrigger()
.withSchedule(CronScheduleBuilder.cronSchedule("0/10 * * * * ?"))
.withIdentity("trigger2","group2")
.withDescription("this is a trigger")
.build();
scheduler.scheduleJob(jobDetail,trigger);
scheduler.start();
}
}
RamJob
package com.xzy.quart01.job;
import org.quartz.Job;
import org.quartz.JobDataMap;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* @author XZY
* @site www.Xzy.com
* @company
* @create 2019-11-14 16:43
*/
public class RamJob implements Job {
@Override
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.err.println("quartz Task 定时启动..."+format.format(new Date()));
try {
Thread.sleep(20*1000);
System.out.println("处理大数据量的好使操作~~~~~~~~~~");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
