spring cloud 集成 quartz (注解方式）

我会带着你远行 2022-12-31 08:26 302阅读 0赞

相比于scheduler，quartz支持分布式、持久化。当你部署多个实例时，定时任务会在多个实例上调度执行，提升了处理能力，同时多个实例也不会重复执行同一任务。而且也保证了服务的可靠性和高可用。

# 依赖 #

implementation("org.springframework.boot:spring-boot-starter-quartz")

现在我都用gradle进行依赖管理，比maven简洁和智能。  
gradle后台使用的也是maven源。

# 配置 #

application.yml

spring:
      quartz:
        job-store-type: jdbc
        jdbc:
          initialize-schema: always
        properties:
          org:
            quartz:
              scheduler:
                instanceName: clusteredScheduler
                instanceId: AUTO
              jobStore:
                class: org.quartz.impl.jdbcjobstore.JobStoreTX
                driverDelegateClass: org.quartz.impl.jdbcjobstore.StdJDBCDelegate
                tablePrefix: QRTZ_
                isClustered: true
                clusterCheckinInterval: 10000
                useProperties: false
              threadPool:
                class: org.quartz.simpl.SimpleThreadPool
                threadCount: 10
                threadPriority: 5
                threadsInheritContextClassLoaderOfInitializingThread: true

由于配置了`job-store-type: jdbc`，我们需要有一个数据源，比如mysql：

spring:
      datasource:
        url: jdbc:mysql://192.168.1.11:3306/test?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=Asia/Shanghai
        username: root
        password: xxxxx
        type: com.zaxxer.hikari.HikariDataSource
        hikari:
          minimum-idle: 5
          idle-timeout: 180000
          maximum-pool-size: 10
          max-lifetime: 1800000
          connection-timeout: 30000
          connection-test-query: select 1

和平时的datasource是一致的。

# 定时任务代码 #

## 注解配置trigger ##

代码是用kotlin写的：

@Configuration
    class QuartzSchedulerConfig { 
    
    
        @Bean
        fun jobTrigger(jobDetail:JobDetail):CronTriggerFactoryBean{ 
            val trigger = CronTriggerFactoryBean()
            trigger.setJobDetail(jobDetail)
            trigger.setCronExpression("0/15 * * * * ?")
            return trigger
        }
    
        @Bean
        fun jobDetail():JobDetailFactoryBean{ 
            val jobDetailFactoryBean = JobDetailFactoryBean()
            jobDetailFactoryBean.setJobClass(WeatherJob::class.java)
            jobDetailFactoryBean.setDurability(true)
            return jobDetailFactoryBean
        }
    
    
    }

## 任务代码 ##

@Component
    class WeatherJob : QuartzJobBean() { 
        private val log:Logger = LoggerFactory.getLogger(WeatherJob::class.java)
        /** * Execute the actual job. The job data map will already have been * applied as bean property values by execute. The contract is * exactly the same as for the standard Quartz execute method. * @see .execute */
        override fun executeInternal(context: JobExecutionContext) { 
            log.info("start job")
        }
    }

每15秒会调用上面的`executeInternal`方法。

完成！