如何使用 Scala 安排石英作业

本文介绍了如何使用 Scala 安排石英作业的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试获取在 Scala 中运行的石英作业的最简单示例.

I am trying to get the most simple example of a quartz job running in Scala.

configure() 在我的模块加载时执行一次.

configure() gets executed once when my module is loaded.

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，当此代码运行时，我收到一条错误消息.

However, I get an error message when this code runs.

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$$anon$1' at org.quartz.simpl.SimpleJobFactory.newJob(SimpleJobFactory.java:58) ~[quartz-2.2.1.jar:na] at org.quartz.simpl.PropertySettingJobFactory.newJob(PropertySettingJobFactory.java:69) ~[quartz-2.2.1.jar:na] at org.quartz.core.JobRunShell.initialize(JobRunShell.java:127) ~[quartz-2.2.1.jar:na] at org.quartz.core.QuartzSchedulerThread.run(QuartzSchedulerThread.java:375) [quartz-2.2.1.jar:na] Caused by: java.lang.InstantiationException: com.search.binder.SearchModule$$anon$1 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$1.<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

有没有人有一个在 Scala 中运行的尽可能简单"的石英调度程序示例?

Does anyone have an "as simple as possible" example of quartz scheduler running in Scala?

推荐答案

我认为问题在于quartz 试图实例化一个Job 的新实例，但它找不到它的构造函数，因为您通过 Job.getClass 传递的类是一个匿名类.尝试如下定义:

I think that the problem is that quartz is trying to instantiate a new instance of Job but it can't find its constructor because the class you are passing via Job.getClass is an anonymous class. Try defining it as follows:

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

然后:

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