grails - quartz 服务

Question

我用Grails编写了一个应用程序，但是 quartz 存在一些问题。
我想从数据库中获取用户，然后再获取其服务器。
如果有任何服务器，我想检查每台服务器上的PING命令，但会收到如下消息:

" [quartzScheduler_Worker-1] ERROR listeners.ExceptionPrinterJobListener - Exception occurred in job: GRAILS_JOBS. Message: java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request. Line | Method ->> 96 | execute in grails.plugins.quartz.GrailsJobFactory$GrailsJob - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | 216 | run in org.quartz.core.JobRunShell ^ 549 | run . . in org.quartz.simpl.SimpleThreadPool$WorkerThread
Caused by IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request. ->> 131 | currentRequestAttributes in org.springframework.web.context.request.RequestContextHolder"

这是我的代码:

 def execute() {
     pingService.checkPing()
 }



 def checkPing = {
     User user = User.findByLogin(session.user.login) //get user
     def hostsToPing = importFromDB()
     if (!hostsToPing.isEmpty()) {
         hostsToPing.each {host ->
             doPing(host)
         }
     } else {
         //something else
     }
 }

 def importFromDB = {
     User user = User.findByLogin(session.user.login)
     def hostsList = Host.findAllByUser(user)
     hostsList
 }

 def doPing(Host host) {
     println "InetAdress: " + InetAddress.getByName(host.hostAdress)
     println "InetAdress is Rea: " + InetAddress.getLocalHost().isReachable(1000)
 }

出现以下情况时不会出现此问题:

def doPing(Host host) {
    println "InetAdress: " + InetAddress.getByName("www.google.com")
    println "InetAdress is Reachable : " + InetAddress.getLocalHost().isReachable(1000)
}

有人知道怎么了吗？

Answer 1

这是因为您指的是session.user.login。 session期间没有Job。
想象一下，当没有用户登录时作业就开始了-那么您指的是哪个用户？

因此，要么检查User.list()中的每个用户，要么使一个单例bean与用户一起排队。