quartz-scheduler

I am designing a scheduler and using quartz library. I want to check whether cron expression time refer to the time in the future, Otherwise trigger won't be executed at all. Is there any way of comparing cron expression time with current time in java. Something to consider is that a standard valid cron expression will always refer to a valid time in the future. The one caveat to this is that Quartz cron expressions may include an optional year field, which could be in the past as well as the future. To check the validity of the expression, you can build a CronExpression instance then ask it

I am working on web project based on spring hibernate.I am using c3p0 for connection pooling.Sometimes the server is automatically stopped and showing that "The web application registered JDBC driver but failed to unregister" .And also the following error. "The web application appears to have started DefaultQuartzSchelduler_Worker_1 but has failed to stop" This error is still occurs after i have removed Quartz job related code in my project.I have closed all the stream which causes memory leaks but still I dont know why this is happening.Please help me out regarding this issue because the

I create a crawler that gets the news from the other website that i defined before for it ,so i use quartz to run a task in background.the schedule is defined like this : public class JobBackground : IJob { public void Execute(IJobExecutionContext context) { for (int j = 1; j <= 920; j++) { NewsRepository newsRepository = new NewsRepository(); GoyaAgent Goyaagent = new GoyaAgent(); Task<List<NewsContent>> lst = Goyaagent.parsing("http://www.gooyait.com/page/"+j); List<NewsContent> enresult = lst.Result; foreach (NewsContent newsContent in enresult) { News newnews = new News(); newnews.Subject

How to customize the exception handling for "@Scheduled" annotation from spring ? I have cron jobs which will be triggered in the server (Tomcat 6) and when any exceptions occur I need to do some handling. Spring version 3.2 Tomcat Server 6 You could implement and register an ErrorHandler for the ThreadPoolTaskScheduler that is used for your scheduling annotations. <task:annotation-driven scheduler="yourThreadPoolTaskScheduler" /> <bean id="yourThreadPoolTaskScheduler" class="org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler"> <property name="poolSize" value="5" /> <property

Something i am not clear on. Say i have jobs randomly scheduled throughout the day and each job takes 30 minutes to run. Say i have five of these jobs running and Tomcat gets killed. Do the jobs restart when i start Tomcat with my application, or are the currently running jobs lost because they already fired? Short answer, by default, currently running Jobs are considered fired and are not recovered .. but you can set requestRecovery property when you build a Job (JobDetail) to tell Quartz to recover that running Jobs in case of crash a.k.a. "hard shutdown". Quoting the official documentation