Springboot 集成quartz 使用jpa配置多数据源

依赖包

  • springboot 是2.X版本,quartz已经在starter之中
  • maven依赖包如下:
    
        
            org.springframework.boot
            spring-boot-starter-data-jpa
        
        
            mysql
            mysql-connector-java
            runtime
        
        
            org.springframework.boot
            spring-boot-starter-quartz
        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.projectlombok
            lombok
            true
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    

配置文件

  • yml配置文件如下:
server:
  port: 8014

spring:
  application:
    name: r-project-quartz
  datasource:
    primary:
      jdbc-url: jdbc:mysql://localhost:3307/JLCredit  #连接user数据库
      username: root
      password: 123456
      driver-class-name: com.mysql.cj.jdbc.Driver

    quartz:
     jdbc-url: jdbc:mysql://localhost:3307/QUARTZ_TABLE  #连接user数据库
     username: root
     password: 123456
     driver-class-name: com.mysql.cj.jdbc.Driver

  jpa:
    show-sql: true
    hibernate:
      naming:
        #命名规则设置
        physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl

  quartz:
    #持久化方式,将定时任务信息储存到数据库
    #持久化到数据库之后,暂定/启动等定时任务状态也会持久化
    job-store-type: jdbc
    #初始化表结构
    jdbc:
      initialize-schema: never
    #由配置创建的作业是否覆盖从持久性作业存储中读取的作业
    overwrite-existing-jobs: false
    #相关属性配置
    properties:
      org:
        quartz:
          scheduler:
            instanceName: clusteredScheduler
            instanceId: AUTO
          jobStore:
            # 数据源名称
            dataSource: quartzDataSource
            class: org.quartz.impl.jdbcjobstore.JobStoreTX
            driverDelegateClass: org.quartz.impl.jdbcjobstore.StdJDBCDelegate
            tablePrefix: QRTZ_
            isClustered: true
            clusterCheckinInterval: 1000
            useProperties: false
          threadPool:
            class: org.quartz.simpl.SimpleThreadPool
            threadCount: 10
            threadPriority: 5
            threadsInheritContextClassLoaderOfInitializingThread: true
  • 在此处配置了两个mysql数据库,其中primary为默认数据库
  • jpa.hibernate.naming.physical-strategy是数据库命名规则。由于数据库中数据库名称和字段都是大写,而jpa默认字段都会转为小写,于是改变命名规则,使得其与当前书写方式完全一致
  • jobStore.dataSource是指quartz持久化所使用的数据库的来源,会带在代码中用@QuartzDataSource来注明
  • quartz. job-store-type指的是定时任务的持久化,当服务关闭再开启的时候,能够读取任务的状态,例如暂停或者开启;若是配置为memory则无需配置持久化数据库了
  • quartz.jdbc.initialize-schema据说能自动建表,但是我没成功过,建表所需的各版本sql语句参考:https://github.com/quartz-scheduler/quartz/tree/9f9e400733f51f7cb658e3319fc2c140ab8af938/quartz-core/src/main/resources/org/quartz/impl/jdbcjobstore(基本上度娘找出来的都是mysql的写法,一大堆写各版本的标题党,当真浪费时间)

多数据源设置

  • 数据源总的配置:
@Configuration
public class DataSourceConfig {

    @Primary //主数据库
    @Bean(name = "primarySource")//将该对象放入spring容器
    @Qualifier("primarySource")//寻找spring容器该名字的对象
    @ConfigurationProperties(prefix = "spring.datasource.primary")
    public DataSource primarySource() {
        return DataSourceBuilder.create().build();
    }

    @QuartzDataSource
    @Bean(name = "quartzSource")
    @Qualifier("quartzSource")
    @ConfigurationProperties(prefix = "spring.datasource.quartz")
    public DataSource quartzSource() {
        return DataSourceBuilder.create().build();
    }
}
  • @Primary 注解在主数据库上
  • @QuartzDataSource注解在quartz持久化数据库上
  • @ConfigurationProperties对应配置文件的内容,不能写错
  • 各个数据库的配置:

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef = "primaryEntityManagerFactory",
        transactionManagerRef = "primaryTransactionManager",
        basePackages = {"com.ladyishenlong.rprojectquartz.jpa.primary"}) //设置Repository所在位置
public class PrimaryConfig {

    @Autowired
    private JpaProperties jpaProperties;

    @Resource
    private HibernateProperties hibernateProperties;

    @Autowired
    @Qualifier("primarySource")
    private DataSource primaryDataSource;

    @Primary
    @Bean(name = "primaryEntityManager")
    public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
        return Objects.requireNonNull(primaryEntityManagerFactory(builder).getObject()).createEntityManager();
    }

    @Primary
    @Bean(name = "primaryEntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean primaryEntityManagerFactory(EntityManagerFactoryBuilder builder) {
        return builder
                .dataSource(primaryDataSource)
                .properties(hibernateProperties.determineHibernateProperties(
                        jpaProperties.getProperties(), new HibernateSettings()))
                .packages("com.ladyishenlong.rprojectquartz.model.primary") //设置实体类所在位置
                .persistenceUnit("primaryPersistenceUnit")
                .build();
    }


    @Primary
    @Bean(name = "primaryTransactionManager")
    public PlatformTransactionManager primaryTransactionManager(EntityManagerFactoryBuilder builder) {
        return new JpaTransactionManager(primaryEntityManagerFactory(builder).getObject());
    }


}

@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(
        entityManagerFactoryRef = "quartzEntityManagerFactory",
        transactionManagerRef = "quartzTransactionManager",
        basePackages = {"com.ladyishenlong.rprojectquartz.jpa.quartz"}) //设置Repository所在位置
public class QuartzConfig {
    
        @Autowired
        private JpaProperties jpaProperties;

        @Resource
        private HibernateProperties hibernateProperties;

        @Autowired
        @Qualifier("quartzSource")
        private DataSource quartzDataSource;

        @Bean(name = "quartzEntityManager")
        public EntityManager entityManager(EntityManagerFactoryBuilder builder) {
            return Objects.requireNonNull(quartzEntityManagerFactory(builder).getObject()).createEntityManager();
        }

        @Bean(name = "quartzEntityManagerFactory")
        public LocalContainerEntityManagerFactoryBean quartzEntityManagerFactory(EntityManagerFactoryBuilder builder) {
            return builder
                    .dataSource(quartzDataSource)
                    .properties(hibernateProperties.determineHibernateProperties(
                            jpaProperties.getProperties(), new HibernateSettings()))
                    .packages("com.ladyishenlong.rprojectquartz.model.quartz") //设置实体类所在位置
                    .persistenceUnit("quartzPersistenceUnit")
                    .build();
        }


        
        @Bean(name = "quartzTransactionManager")
        public PlatformTransactionManager quartzTransactionManager(EntityManagerFactoryBuilder builder) {
            return new JpaTransactionManager(quartzEntityManagerFactory(builder).getObject());
        }


}
  • @Primary只需要在主数据库的文件中添加
  • basePackages里面写的是继承了JpaRepository类的文件的位置;entityManagerFactoryRef与transactionManagerRef是自定义的
  • packages里面写的是该对应数据库的实体类的位置
  • @Qualifier与DataSourceConfig文件之中的@Qualifier对应
  • 至此,jpa的多数据源就配置完毕,其中一个是主要数据库,另一个是用来做quartz的持久化

Quartz定时任务

  • 注册定时任务
@Configuration
public class QuartzTaskConfig {

    @Bean
    public JobDetail uploadTaskDetail() {
        return JobBuilder
                .newJob(MyJob.class).withIdentity("MyJob","Jobs")
                .storeDurably()
                .build();
    }


    //指定具体的定时任务类
    @Bean
    public JobDetail uploadTaskDetail2() {
        return JobBuilder
                .newJob(MyJob2.class).withIdentity("MyJob2","Jobs")
                .storeDurably()
                .build();
    }


    @Bean
    public Trigger uploadTaskTrigger() {
        //每隔5秒执行一次
        CronScheduleBuilder scheduleBuilder = CronScheduleBuilder
                .cronSchedule("*/5 * * * * ?");
        // 返回任务触发器
        return TriggerBuilder
                .newTrigger()
                .forJob(uploadTaskDetail())
                .withIdentity("MyJob")
                .withSchedule(scheduleBuilder)
                .build();
    }


    @Bean
    public Trigger uploadTaskTrigger2() {
        //每隔5秒执行一次
        CronScheduleBuilder scheduleBuilder = CronScheduleBuilder
                .cronSchedule("*/5 * * * * ?");
        // 返回任务触发器
        return TriggerBuilder
                .newTrigger()
                .forJob(uploadTaskDetail2())
                .withIdentity("MyJob2")
                .withSchedule(scheduleBuilder)
                .build();
    }

}
  • 这里注册两个简单的定时任务,都是每隔5s执行一次
@Slf4j
public class MyJob extends QuartzJobBean {
    @Override
    protected void executeInternal(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        log.info("---- 这里是执行定时任务的逻辑的地方 ----");
    }
}
  • 定时任务编写方法如上所示,executeInternal方法之中编写具体的业务逻辑
  • quartz与springboot自带的定时任务不同的是,它是异步的且是可以控制的,在这里简单写了下暂停的重新开始的方法,可以用在controller用来控制定时任务
@Service
public class JobAndTriggerService {

    @Autowired
    private Scheduler scheduler;

    public void pauseJob(String jobClassName, String jobGroupName) throws SchedulerException {
        scheduler.pauseJob(JobKey.jobKey(jobClassName, jobGroupName));
    }

    public void resumeJob(String jobClassName, String jobGroupName) throws SchedulerException {
        scheduler.resumeJob(JobKey.jobKey(jobClassName, jobGroupName));
    }

}
  • 其中jobClassName以及jobGroupName是注册时候定义的,最好两个都要定义
  • 如果用jdbc持久化,且用sql已经在数据库中建表,服务第一次起来以后,数据库中会自动生成这些定时任务的信息,可以连接数据库查看

jpa的entityManager写法

  • jpa能够自动生成sql,但是有些情况需要自己写sql,于是需要使用entityManager
@Service
public class ArticleDao {

    /**
     * 多数据源配置时候,指定数据源
     */
//    @PersistenceContext //无多数据源时候
    @Autowired
    @Qualifier("primaryEntityManagerFactory")
    private EntityManager entityManager;


    public Object test() {
        String sql = "select * from article";

        List articleIndexModels = entityManager

                //将查询结果赋值给实体类
                .createNativeQuery(sql, ArticleTable.class)
                .getResultList();

        return articleIndexModels;
    }


    /**
     * 改动数据库操作必须放在事务之中
     * 增删改 操作相似
     * @return
     */
    @Transactional
    public Object test2() {
        String sql = "insert into article(id, content) values ('12334','搞事情')";
        entityManager
                .createNativeQuery(sql)
                .executeUpdate();
        return "执行成功";
    }

}
  • 如果是单数据源,EntityManager上使用@PersistenceContext注解,多数据源的情况下,需要使用@Autowired与 @Qualifier注解,其中@Qualifier内的之要和entityManagerFactoryRef里面的值一致保证连接的数据库正确
  • 增删改语句使用大致相同,如上代码所示

项目git:https://github.com/ladyishenlong/project-r

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