如何使用 Scala 安排 Quartz 作业

Question

我正在尝试在 Scala 中获取最简单的石英作业示例运行。

configure() 在加载我的模块时执行一次。

lazy val quartz = StdSchedulerFactory.getDefaultScheduler

override def configure() = {
  val Job = new Job {
    override def execute(jobExecutionContext: JobExecutionContext) = {
      println("Event")
    }
  }

  val job = JobBuilder.newJob(Job.getClass)
    .withIdentity("Job", "Group")
    .build

  val trigger: Trigger = TriggerBuilder
    .newTrigger
    .withIdentity("Trigger", "Group")
    .withSchedule(
      CronScheduleBuilder.cronSchedule("0/5 * * * * ?"))
    .build

  quartz.start
  quartz.scheduleJob(job, trigger)
}

但是，我在运行此代码时收到一条错误消息。

2015-09-29 15:27:05,015 [DefaultQuartzScheduler_QuartzSchedulerThread] ERROR
org.quartz.core.ErrorLogger - An error occured instantiating job to be executed. job= 'Group.Job'
org.quartz.SchedulerException: Problem instantiating class 'com.search.binder.SearchModule$$anon'
    at org.quartz.simpl.SimpleJobFactory.newJob(SimpleJobFactory.java:58) ~[quartz-2.2.1.jar:na]
    at org.quartz.simpl.PropertySettingJobFactory.newJob(PropertySettingJobFactory.java:69) ~[quartz-2.2.1.jar:na]
    at org.quartz.core.JobRunShell.initialize(JobRunShell.java:127) ~[quartz-2.2.1.jar:na]
    at org.quartz.core.QuartzSchedulerThread.run(QuartzSchedulerThread.java:375) [quartz-2.2.1.jar:na]
Caused by: java.lang.InstantiationException: com.search.binder.SearchModule$$anon
    at java.lang.Class.newInstance(Class.java:427) ~[na:1.8.0_45]
    at org.quartz.simpl.SimpleJobFactory.newJob(SimpleJobFactory.java:56) ~[quartz-2.2.1.jar:na]
    ... 3 common frames omitted
Caused by: java.lang.NoSuchMethodException: com.search.binder.SearchModule$$anon.<init>()
    at java.lang.Class.getConstructor0(Class.java:3082) ~[na:1.8.0_45]
    at java.lang.Class.newInstance(Class.java:412) ~[na:1.8.0_45]
    ... 4 common frames omitted

有人在 Scala 中有 "as simple as possible" 石英调度程序运行的示例吗？

Answer 1

我认为问题在于 quartz 正在尝试实例化 Job 的新实例，但它找不到它的构造函数，因为 class 您正在通过 Job.getClass是匿名的class。尝试按如下方式定义它：

class MyJob extends Job {
  override def execute(jobExecutionContext: JobExecutionContext) = {
    println("Event")
  }
}

然后：

val job = JobBuilder.newJob(classOf[MyJob])
  .withIdentity("Job", "Group")
  .build

如何使用 Scala 安排 Quartz 作业

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