目标:在springboot中通过读取数据库的定时任务信息,动态生成quartz定时任务
实现步骤:
1、导入pom依赖 配置基础配置
2、在项目中添加quartz.properties文件(这样就不会加载自带的properties文件)
3. 在数据库中创建quartz相关表, 逆向生成
4、自定义MyJobFactory,解决spring不能在quartz中注入bean的问题
5、创建调度器schedule
6、 创建自定义任务
7、更新quartz中的任务
8、自定义任务表与quartz内置表的区分
动态定时任务实现
案例1、读取数据库中表达式启动定时任务1(每5s执行)
案例2、更改定时任务状态(启用/禁用),定时任务1停止
案例3、读取数据库中表达式启动定时任务2(每5s执行),在对应作业类中打印定时任务2携带的参数
案例4、读取数据库中表达式启动定时任务3(每5s执行改成每20s执行),更改数据库定时任务表达式,定时任务3对应执行策略相应发生改变。
注意:为了讲解内容方便,不涉及到页面,又能将功能展现出来,本篇博客采取的是spring自带的定时器与quartz调度框架一并使用。
先新建一个module
1.导入pom依赖,以及基本配置
<!--quartz核心作业类-->
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz-jobs</artifactId>
<version>2.3.0</version>
</dependency>
<resources>
<!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
<resource>
<directory>src/main/resources</directory>
<includes>
<include>*.properties</include>
<include>*.xml</include>
<include>*.yml</include>
</includes>
</resource>
</resources>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
</dependencies>
<configuration>
<overwrite>true</overwrite>
</configuration>
</plugin>
//创建时有了
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-quartz</artifactId>
</dependency>
<!--quartz需要使用C3P0连接池将数据持久化到数据库-->
<!--Quartz各版本数据库连接池技术更新情况-->
<!--Quartz 2.0 以前 DBCP-->
<!--Quartz 2.0 以后 C3P0(包含2.0)-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
配置 .application.yml
server:
servlet:
context-path: /quartz02
spring:
datasource:
#1.JDBC
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8
username: root
password: 123
druid:
#2.连接池配置
#初始化连接池的连接数量 大小,最小,最大
initial-size: 5
min-idle: 5
max-active: 20
#配置获取连接等待超时的时间
max-wait: 60000
#配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒
time-between-eviction-runs-millis: 60000
# 配置一个连接在池中最小生存的时间,单位是毫秒
min-evictable-idle-time-millis: 30000
validation-query: SELECT 1 FROM DUAL
test-while-idle: true
test-on-borrow: true
test-on-return: false
# 是否缓存preparedStatement,也就是PSCache 官方建议MySQL下建议关闭 个人建议如果想用SQL防火墙 建议打开
pool-prepared-statements: true
max-pool-prepared-statement-per-connection-size: 20
# 配置监控统计拦截的filters,去掉后监控界面sql无法统计,'wall'用于防火墙
filter:
stat:
merge-sql: true
slow-sql-millis: 5000
#3.基础监控配置
web-stat-filter:
enabled: true
url-pattern: /*
#设置不统计哪些URL
exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
session-stat-enable: true
session-stat-max-count: 100
stat-view-servlet:
enabled: true
url-pattern: /druid/*
reset-enable: true
#设置监控页面的登录名和密码
login-username: admin
login-password: admin
allow: 127.0.0.1
#deny: 192.168.1.100
#显示日志
logging:
level:
com.zking.quartz02.mapper: debug
generatorConfig.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
<!-- 引入配置文件 -->
<properties resource="jdbc.properties"/>
<!--指定数据库jdbc驱动jar包的位置-->
<classPathEntry location="E:\maven\apache-maven-3.5.0-bin\apache-maven-3.5.0-bin\mvn_repository\mysql\mysql-connector-java\5.1.44\mysql-connector-java-5.1.44.jar"/>
<!-- 一个数据库一个context -->
<context id="infoGuardian">
<!-- 注释 -->
<commentGenerator>
<property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
<property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
</commentGenerator>
<!-- jdbc连接 -->
<jdbcConnection driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>
<!-- 类型转换 -->
<javaTypeResolver>
<!-- 是否使用bigDecimal, false可自动转化以下类型(Long, Integer, Short, etc.) -->
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 01 指定javaBean生成的位置 -->
<!-- targetPackage:指定生成的model生成所在的包名 -->
<!-- targetProject:指定在该项目下所在的路径 -->
<javaModelGenerator targetPackage="com.zking.quartz02.entity"
targetProject="src/main/java">
<!-- 是否允许子包,即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
<!-- 是否对model添加构造函数 -->
<property name="constructorBased" value="true"/>
<!-- 是否针对string类型的字段在set的时候进行trim调用 -->
<property name="trimStrings" value="false"/>
<!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法,只有构造方法 -->
<property name="immutable" value="false"/>
</javaModelGenerator>
<!-- 02 指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.zking.quartz02.mapper"
targetProject="src/main/java">
<!-- 是否允许子包,即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!-- 03 生成XxxMapper接口 -->
<!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 -->
<!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 -->
<!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 -->
<javaClientGenerator targetPackage="com.zking.quartz02.mapper"
targetProject="src/main/java" type="XMLMAPPER">
<!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model, true:com.oop.eksp.user.model.[schemaName] -->
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>
<!-- 配置表信息 -->
<!-- schema即为数据库名 -->
<!-- tableName为对应的数据库表 -->
<!-- domainObjectName是要生成的实体类 -->
<!-- enable*ByExample是否生成 example类 -->
<!--<table schema="" tableName="t_book" domainObjectName="Book"-->
<!--enableCountByExample="false" enableDeleteByExample="false"-->
<!--enableSelectByExample="false" enableUpdateByExample="false">-->
<!--<!– 忽略列,不生成bean 字段 –>-->
<!--<!– <ignoreColumn column="FRED" /> –>-->
<!--<!– 指定列的java数据类型 –>-->
<!--<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>-->
<!--</table>-->
<!-- 配置表信息 -->
<table schema="" tableName="t_schedule_trigger" domainObjectName="ScheduleTrigger"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
<property name="useActualColumnNames" value="true" />
</table>
<table schema="" tableName="t_schedule_trigger_param" domainObjectName="ScheduleTriggerParam"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
<property name="useActualColumnNames" value="true" />
</table>
</context>
</generatorConfiguration>
jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123
jdbc.initialSize=10
jdbc.maxTotal=100
jdbc.maxIdle=50
jdbc.minIdle=10
jdbc.maxWaitMillis=-1
2.在项目中添加quartz.properties文件(这样就不会加载自带的properties文件)
我们使用druid 更换成Druid连接池
1.1 引入依赖
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
1.2 导入DruidConnectionProvider.java
package com.zking.quartz02.util;
import com.alibaba.druid.pool.DruidDataSource;
import org.quartz.SchedulerException;
import org.quartz.utils.ConnectionProvider;
import java.sql.Connection;
import java.sql.SQLException;
/*
#============================================================================
# JDBC
#============================================================================
org.quartz.jobStore.driverDelegateClass:org.quartz.impl.jdbcjobstore.StdJDBCDelegate
org.quartz.jobStore.useProperties:false
org.quartz.jobStore.dataSource:qzDS
#org.quartz.dataSource.qzDS.connectionProvider.class:org.quartz.utils.PoolingConnectionProvider
org.quartz.dataSource.qzDS.connectionProvider.class:com.javaxl.q03.quartz.DruidConnectionProvider
org.quartz.dataSource.qzDS.driver:com.mysql.jdbc.Driver
org.quartz.dataSource.qzDS.URL:jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8
org.quartz.dataSource.qzDS.user:root
org.quartz.dataSource.qzDS.password:root
org.quartz.dataSource.qzDS.maxConnections:30
org.quartz.dataSource.qzDS.validationQuery: select 0
*/
/**
* [Druid连接池的Quartz扩展类]
*
* @ProjectName: []
* @Author: [xuguang]
* @CreateDate: [2015/11/10 17:58]
* @Update: [说明本次修改内容] BY[xuguang][2015/11/10]
* @Version: [v1.0]
*/
public class DruidConnectionProvider implements ConnectionProvider {
/*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* 常量配置,与quartz.properties文件的key保持一致(去掉前缀),同时提供set方法,Quartz框架自动注入值。
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
//JDBC驱动
public String driver;
//JDBC连接串
public String URL;
//数据库用户名
public String user;
//数据库用户密码
public String password;
//数据库最大连接数
public int maxConnection;
//数据库SQL查询每次连接返回执行到连接池,以确保它仍然是有效的。
public String validationQuery;
private boolean validateOnCheckout;
private int idleConnectionValidationSeconds;
public String maxCachedStatementsPerConnection;
private String discardIdleConnectionsSeconds;
public static final int DEFAULT_DB_MAX_CONNECTIONS = 10;
public static final int DEFAULT_DB_MAX_CACHED_STATEMENTS_PER_CONNECTION = 120;
//Druid连接池
private DruidDataSource datasource;
/*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* 接口实现
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
public Connection getConnection() throws SQLException {
return datasource.getConnection();
}
public void shutdown() throws SQLException {
datasource.close();
}
public void initialize() throws SQLException{
if (this.URL == null) {
throw new SQLException("DBPool could not be created: DB URL cannot be null");
}
if (this.driver == null) {
throw new SQLException("DBPool driver could not be created: DB driver class name cannot be null!");
}
if (this.maxConnection < 0) {
throw new SQLException("DBPool maxConnectins could not be created: Max connections must be greater than zero!");
}
datasource = new DruidDataSource();
try{
datasource.setDriverClassName(this.driver);
} catch (Exception e) {
try {
throw new SchedulerException("Problem setting driver class name on datasource: " + e.getMessage(), e);
} catch (SchedulerException e1) {
}
}
datasource.setUrl(this.URL);
datasource.setUsername(this.user);
datasource.setPassword(this.password);
datasource.setMaxActive(this.maxConnection);
datasource.setMinIdle(1);
datasource.setMaxWait(0);
datasource.setMaxPoolPreparedStatementPerConnectionSize(this.DEFAULT_DB_MAX_CACHED_STATEMENTS_PER_CONNECTION);
if (this.validationQuery != null) {
datasource.setValidationQuery(this.validationQuery);
if(!this.validateOnCheckout)
datasource.setTestOnReturn(true);
else
datasource.setTestOnBorrow(true);
datasource.setValidationQueryTimeout(this.idleConnectionValidationSeconds);
}
}
/*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* 提供get set方法
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
public String getDriver() {
return driver;
}
public void setDriver(String driver) {
this.driver = driver;
}
public String getURL() {
return URL;
}
public void setURL(String URL) {
this.URL = URL;
}
public String getUser() {
return user;
}
public void setUser(String user) {
this.user = user;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public int getMaxConnection() {
return maxConnection;
}
public void setMaxConnection(int maxConnection) {
this.maxConnection = maxConnection;
}
public String getValidationQuery() {
return validationQuery;
}
public void setValidationQuery(String validationQuery) {
this.validationQuery = validationQuery;
}
public boolean isValidateOnCheckout() {
return validateOnCheckout;
}
public void setValidateOnCheckout(boolean validateOnCheckout) {
this.validateOnCheckout = validateOnCheckout;
}
public int getIdleConnectionValidationSeconds() {
return idleConnectionValidationSeconds;
}
public void setIdleConnectionValidationSeconds(int idleConnectionValidationSeconds) {
this.idleConnectionValidationSeconds = idleConnectionValidationSeconds;
}
public DruidDataSource getDatasource() {
return datasource;
}
public void setDatasource(DruidDataSource datasource) {
this.datasource = datasource;
}
}
1.3 修改quartz.properties配置 #配置数据库源
#
#============================================================================
# Configure Main Scheduler Properties 调度器属性
#============================================================================
org.quartz.scheduler.instanceName: DefaultQuartzScheduler
org.quartz.scheduler.instanceId = AUTO
org.quartz.scheduler.rmi.export: false
org.quartz.scheduler.rmi.proxy: false
org.quartz.scheduler.wrapJobExecutionInUserTransaction: false
org.quartz.threadPool.class: org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount= 10
org.quartz.threadPool.threadPriority: 5
org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread: true
org.quartz.jobStore.misfireThreshold: 60000
#============================================================================
# Configure JobStore
#============================================================================
#存储方式使用JobStoreTX,也就是数据库
org.quartz.jobStore.class: org.quartz.impl.jdbcjobstore.JobStoreTX
org.quartz.jobStore.driverDelegateClass:org.quartz.impl.jdbcjobstore.StdJDBCDelegate
#使用自己的配置文件
org.quartz.jobStore.useProperties:true
#数据库中quartz表的表名前缀
org.quartz.jobStore.tablePrefix:qrtz_
org.quartz.jobStore.dataSource:qzDS
#是否使用集群(如果项目只部署到 一台服务器,就不用了)
org.quartz.jobStore.isClustered = true
#============================================================================
# Configure Datasources
#============================================================================
#配置数据库源(org.quartz.dataSource.qzDS.maxConnections: c3p0配置的是有s的,druid数据源没有s)
org.quartz.dataSource.qzDS.connectionProvider.class:com.zking.quartz02.util.DruidConnectionProvider
org.quartz.dataSource.qzDS.driver: com.mysql.jdbc.Driver
org.quartz.dataSource.qzDS.URL: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8
org.quartz.dataSource.qzDS.user: root
org.quartz.dataSource.qzDS.password: 123
org.quartz.dataSource.qzDS.maxConnection: 10
3.自定义在数据库中创建quartz相关表 以及方法的创建 (案例方法)
quartz调度框架是有内置表的
进入quartz的官网http://www.quartz-scheduler.org/,点击Downloads,
下载后在目录\docs\dbTables下有常用数据库创建quartz表的脚本,例如:“tables_mysql.sql”
table_mysql.sql
table_mysql_innodb.sql
上述两者所有的数据库引擎不一样
自定义业务表
-- 注意:job_name存放的任务类的全路径,在quartz中通过jobName和jobGroup来确定trigger的唯一性,所以这两列为联合唯一索引
create table t_schedule_trigger
(
id int primary key auto_increment, -- ID
cron varchar(200) not null, -- 时间表达式
status char(1) not null, -- 使用状态 0:禁用 1:启用
job_name varchar(200) not null, -- 任务名称
job_group varchar(200) not null, -- 任务分组
unique index(job_name,job_group)
);
-- 额外添加到任务中的参数
create table t_schedule_trigger_param
(
param_id int primary key auto_increment, -- ID
name varchar(200) not null, -- 参数名
value varchar(512), -- 参数值
schedule_trigger_id int not null, -- 外键:引用t_schedule_trigger(id)
foreign key(schedule_trigger_id) references t_schedule_trigger(id)
);
案例中需要观察表数据变化的表
-- 自定义的业务表
SELECT * FROM t_schedule_trigger;
SELECT * FROM t_schedule_trigger_param;
-- quartz调度框架自带的表
SELECT * FROM qrtz_scheduler_state;
SELECT * FROM qrtz_cron_triggers;
SELECT * FROM qrtz_simple_triggers
SELECT * FROM qrtz_triggers;
SELECT * FROM qrtz_job_details;
ScheduleTriggerMapper.java
/**
* 查询触发器中包含的所有任务
* @return
*/
List<ScheduleTrigger> queryScheduleTriggerLst();
ScheduleTriggerParamMapper.java
/**
* 查询出当前任务类对应所需的参数
* @param triggerId
* @return
*/
List<ScheduleTriggerParam> queryScheduleParamLst(Integer triggerId);
ScheduleTriggerMapper.xml
<select id="queryScheduleTriggerLst" resultType="com.zking.quartz02.entity.ScheduleTrigger">
select <include refid="Base_Column_List"/>
from t_schedule_trigger
</select>
ScheduleTriggerParamMapper.xml
<select id="queryScheduleParamLst" resultType="com.zking.quartz02.entity.ScheduleTriggerParam">
select <include refid="Base_Column_List"/>
from t_schedule_trigger_param where schedule_trigger_id=#{triggerId}
</select>
ScheduleTriggerParamService
package com.zking.quartz02.service;
import com.zking.quartz02.entity.ScheduleTriggerParam;
import java.util.List;
/**
* @author HYT
* @site
* @company
* @create 2019-02-24 16:49
*/
public interface ScheduleTriggerParamService {
/**
* 查询出当前任务类对应所需的参数
* @param triggerId
* @return
*/
List<ScheduleTriggerParam> queryScheduleParamLst(Integer triggerId);
}
ScheduleTriggerParamServiceImpl
package com.zking.quartz02.service.impl;
import com.zking.quartz02.entity.ScheduleTriggerParam;
import com.zking.quartz02.mapper.ScheduleTriggerParamMapper;
import com.zking.quartz02.service.ScheduleTriggerParamService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @author HYT
* @site
* @company
* @create 2019-02-24 16:51
*/
@Service
public class ScheduleTriggerParamServiceImpl implements ScheduleTriggerParamService {
@Autowired
private ScheduleTriggerParamMapper scheduleTriggerParamMapper;
@Override
public List<ScheduleTriggerParam> queryScheduleParamLst(Integer triggerId) {
return scheduleTriggerParamMapper.queryScheduleParamLst(triggerId);
}
}
4.自定义MyJobFactory,解决spring不能在quartz中注入bean的问题
package com.zking.quartz02.quartz;
import lombok.extern.slf4j.Slf4j;
import org.quartz.spi.TriggerFiredBundle;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
import org.springframework.scheduling.quartz.AdaptableJobFactory;
import org.springframework.stereotype.Component;
/**
* 自定义MyJobFactory,解决spring不能在quartz中注入bean的问题
*
*/
@Component
@Slf4j
public class MyJobFactory extends AdaptableJobFactory {
//这个由Spring自动注入
@Autowired
private AutowireCapableBeanFactory autowireCapableBeanFactory;
//重写Job任务对象的创建实例方法
@Override
protected Object createJobInstance(TriggerFiredBundle bundle) throws Exception {
Object jobInstance = super.createJobInstance(bundle);
//通过以下方式,解决Job任务无法使用Spring中的Bean问题
autowireCapableBeanFactory.autowireBean(jobInstance);
return jobInstance;
//原生态方法 :直接返回 return super.createJobInstance(bundle); 没有交给spring`管理
}
}
5、创建调度器schedule
QuartzConfiguration.java(quartz调度框架与spring框架整合的配置类,主要是要将org.quartz.Scheduler交给spring进行管理)
package com.zking.quartz02.quartz;
import org.quartz.Scheduler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.PropertiesFactoryBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.scheduling.quartz.SchedulerFactoryBean;
import java.io.IOException;
import java.util.Properties;
@Configuration
public class QuartzConfiguration {
@Autowired
private MyJobFactory myJobFactory;
//创建调度器工厂
@Bean
public SchedulerFactoryBean schedulerFactoryBean(){
//1.创建SchedulerFactoryBean
//2.加载自定义的quartz.properties配置文件
//3.设置MyJobFactory
SchedulerFactoryBean factoryBean=new SchedulerFactoryBean();//创建SchedulerFactoryBean
try {
factoryBean.setQuartzProperties(quartzProperties());//加载自定义的quartz.properties配置文件
factoryBean.setJobFactory(myJobFactory);//设置MyJobFactory自定义作业类
return factoryBean;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Bean
public Properties quartzProperties() throws IOException {
PropertiesFactoryBean propertiesFactoryBean=new PropertiesFactoryBean();
propertiesFactoryBean.setLocation(new ClassPathResource("/quartz.properties"));//主要为了拿到数据库连接池
propertiesFactoryBean.afterPropertiesSet();
return propertiesFactoryBean.getObject();
}
//创建并开启scheduler调度器
@Bean(name="scheduler")
public Scheduler scheduler(){
return schedulerFactoryBean().getScheduler();
}
}
6、 创建自定义任务
MyJob.java MyJob1.java MyJob2.java (详细见案例)
7.更新quartz中的任务
spring自带定时任务作业类ScheduleTriggerServiceImpl.java
package com.zking.quartz02.service.impl;
import com.zking.quartz02.entity.ScheduleTrigger;
import com.zking.quartz02.entity.ScheduleTriggerParam;
import com.zking.quartz02.mapper.ScheduleTriggerMapper;
import com.zking.quartz02.mapper.ScheduleTriggerParamMapper;
import org.quartz.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* spring自带定时任务作业类ScheduleTriggerServiceImpl.java
* @author HYT
* @site
* @company
* @create 2019-02-24 16:57
*
*/
@Service
public class ScheduleTriggerServiceImpl {
@Autowired
private ScheduleTriggerMapper scheduleTriggerMapper;
@Autowired
private ScheduleTriggerParamMapper scheduleTriggerParamMapper;
@Autowired
private Scheduler scheduler;
@Scheduled(cron = "0/10 * * * * ?")
public void refreshScheduler() {
try {
List<ScheduleTrigger> scheduleTriggers =
scheduleTriggerMapper.queryScheduleTriggerLst();//查询调度表里所有任务
if (null != scheduleTriggers) {
for (ScheduleTrigger scheduleTrigger : scheduleTriggers) {
String cron = scheduleTrigger.getCron(); //表达式
String jobName = scheduleTrigger.getJob_name(); //任务名称
String jobGroup = scheduleTrigger.getJob_group(); //任务分组
String status = scheduleTrigger.getStatus(); //任务状态
//JobName+JobGroup=Primary Key
//根据jobName和jobGroup生成TriggerKey 主键 ==withIdentity(jobName,group)
TriggerKey triggerKey =
TriggerKey.triggerKey(jobName, jobGroup);
//根据TriggerKey到Scheduler调度器中获取触发器
CronTrigger cronTrigger = (CronTrigger)
scheduler.getTrigger(triggerKey); //触发器 还未绑定条件 空的
if (null == cronTrigger) {
if (status.equals("0"))
continue;
System.out.println("创建调度器");
//创建任务类详情
JobDetail jobDetail =
JobBuilder.newJob((Class<? extends Job>) Class.forName(jobName))
.withIdentity(jobName, jobGroup)
.build();
//往Job任务中传递参数
JobDataMap jobDataMap = jobDetail.getJobDataMap();
List<ScheduleTriggerParam> params =
scheduleTriggerParamMapper.queryScheduleParamLst(scheduleTrigger.getId());
for (ScheduleTriggerParam param : params) {
jobDataMap.put(param.getName(), param.getValue());
}
//创建表达式调度器
CronScheduleBuilder cronSchedule =
CronScheduleBuilder.cronSchedule(cron);
//创建Trigger
cronTrigger = TriggerBuilder.newTrigger()
.withIdentity(jobName, jobGroup)
.withSchedule(cronSchedule)
.build();
//将jobDetail和Trigger注入到scheduler调度器中
scheduler.scheduleJob(jobDetail, cronTrigger);
} else {
//System.out.println("Quartz 调度任务中已存在该任务");
if (status.equals("0")) {
JobKey jobKey = JobKey.jobKey(jobName, jobGroup);
scheduler.deleteJob(jobKey);
continue;
}
//获取到当前正在执行的调度器中的表达式
String cronExpression =
cronTrigger.getCronExpression();
if (!cron.equals(cronExpression)) {
//创建表达式调度器
CronScheduleBuilder cronSchedule =
CronScheduleBuilder.cronSchedule(cron);
//重构
cronTrigger = cronTrigger.getTriggerBuilder()
.withIdentity(triggerKey)
.withSchedule(cronSchedule)
.build();
//刷新调度器
scheduler.rescheduleJob(triggerKey, cronTrigger);
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
Quartz02Application启动类
package com.zking.quartz02;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@MapperScan("com.zking.quartz02.mapper")
@EnableTransactionManagement
@EnableScheduling//
@SpringBootApplication
public class Quartz02Application {
public static void main(String[] args) {
SpringApplication.run(Quartz02Application.class, args);
}
}
案例1:读取数据库中表达式启动定时任务1(每5s执行)
数据库表t_schedule_trigger配置
MyJob.java
<span style="color:#333333">package com.javaxl.quartz02.quartz;
import lombok.extern.slf4j.Slf4j;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.stereotype.Component;
import java.util.Date;
@Component
@Slf4j
public class MyJob implements Job {
@Override
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
System.out.println("MyJob是一个空的任务计划,时间:"+new Date().toLocaleString());
}
}</span>
结果:
Spring自带定时任务每10s执行一次,查询自定义触发器表,获取到具体的作业类及任务表达式,quartz的任务为每5s执行一次,所以打印如上
案例2:更改定时任务状态(启用/禁用),定时任务1停止
更改数据库调度器表t_schedule_trigger的state状态
当禁用该触发器时,那么程序只会执行spring自带的定时任务,每10s执行一次查询,所以打印语句如上。
案例3:读取数据库中表达式启动定时任务2(每5s执行),在对应作业类中打印定时任务2携带的参数
数据库表配置
t_schedule_trigger
t_schedule_trigger_param
MyJob1.java
<span style="color:#333333">@Component
@Slf4j
public class MyJob1 implements Job {
@Autowired
private ScheduleTriggerParamService scheduleTriggerParamService;
@Override
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
JobDetail jobDetail =
jobExecutionContext.getJobDetail();
JobDataMap jobDataMap = jobDetail.getJobDataMap();
System.out.println(new Date().toLocaleString()+"-->携带参数个数:"+jobDataMap.size());
}
}</span>
结果:
程序执行spring自带的定时任务,每10s执行一次查询,查询t_schedule_trigger表,调度器表中有两个调度器,都是每5s执行一次,其中一个调度器是需要携带参数的,携带的参数在t_schedule_trigger_param表中,所以一开始调度器启动的时候需要查询t_schedule_trigger_param表数据,最终打印语句如上。
案例4:读取数据库中表达式启动定时任务3(每5s执行改成每20s执行),更改数据库定时任务表达式,定时任务3对应执行策略相应发生改变。
t_schedule_trigger
t_schedule_trigger_param
MyJob2.java
<span style="color:#333333">@Component
@Slf4j
public class MyJob2 implements Job{
@Override
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
JobDetail jobDetail =
jobExecutionContext.getJobDetail();
JobDataMap jobDataMap = jobDetail.getJobDataMap();
System.out.println(new Date().toLocaleString()+"-->MyJob2参数传递name="+jobDataMap.get("name")+",score="+
jobDataMap.get("score"));
}
}</span>
结果:
程序执行spring自带的定时任务,每10s执行一次查询,查询t_schedule_trigger表,将任务3的表达式由0/3 * * * * ?改成0/20 * * * * ?,最终结果如上
. 小结
要搞清楚一个问题:从数据库读取任务信息动态生成定时任务,和把quartz持久化到数据库是没有关系的。
前者是我们自己定义的业务表,而后者是quartz使用自己的表来存储信息。持久化到数据库后,
就算服务器重启或是多个quartz节点也没关系,因为他们共享数据库中的任务信息。
附录一:AutowireCapableBeanFactory
对于想要拥有自动装配能力,并且想把这种能力暴露给外部应用的BeanFactory类需要实现此接口。
正常情况下,不要使用此接口,应该更倾向于使用BeanFactory或者ListableBeanFactory接口。此接口主要是针对框架之外,没有向Spring托管Bean的应用。通过暴露此功能,Spring框架之外的程序,具有自动装配等Spring的功能。
需要注意的是,ApplicationContext接口并没有实现此接口,因为应用代码很少用到此功能,如果确实需要的话,可以调用ApplicationContext的getAutowireCapableBeanFactory方法,来获取此接口的实例。
如果一个类实现了此接口,那么很大程度上它还需要实现BeanFactoryAware接口。它可以在应用上下文中返回BeanFactory
附录二:@Configuration注解
从Spring3.0,@Configuration用于定义配置类,可替换xml配置文件,
被注解的类内部包含有一个或多个被@Bean注解的方法,这些方法将会被AnnotationConfigApplicationContext
或AnnotationConfigWebApplicationContext类进行扫描,并用于构建bean定义,初始化Spring容器。
注意:
1. @Configuration不可以是final类型;
2. @Configuration不可以是匿名类;
3. 嵌套的configuration必须是静态类。