使用DisallowConcurrentExecution延迟执行Quartz.net

Question

我使用的是最新的nuget Quartz.net包(v2.1.2.400)。

这是我的工作。

[DisallowConcurrentExecution]
[PersistJobDataAfterExecution]
public class HelloJob : IJob
{
    public void Execute(IJobExecutionContext context)
    {
        Console.Out.WriteLine("Hello Job Now=" + DateTime.Now.ToString("s") + " Next=" + context.NextFireTimeUtc.Value.ToLocalTime().ToString("s"));
    }
}

这是我的工作和触发装置..。

            trigger = TriggerBuilder.Create()
            .WithIdentity("trigger1")
            .StartAt(DateTime.UtcNow.AddSeconds(5))
            .WithSchedule(SimpleScheduleBuilder
                .RepeatSecondlyForever(10)
                .WithMisfireHandlingInstructionIgnoreMisfires()                    
            ).Build();
            var job = JobBuilder.Create<HelloJob>().WithIdentity("job1").Build();
            sched.ScheduleJob(job, trigger);

这是我的配置...

        properties["quartz.scheduler.instanceName"] = "TestScheduler";
        properties["quartz.scheduler.instanceId"] = "AUTO";
        properties["quartz.jobStore.type"] = "Quartz.Impl.AdoJobStore.JobStoreTX, Quartz";
        properties["quartz.jobStore.useProperties"] = "true";
        properties["quartz.jobStore.dataSource"] = "default";
        properties["quartz.jobStore.tablePrefix"] = "QRTZ_";
        // if running MS SQL Server we need this
        properties["quartz.jobStore.lockHandler.type"] = "Quartz.Impl.AdoJobStore.UpdateLockRowSemaphore, Quartz";
        properties["quartz.jobStore.clustered"] = "true";

        //http://www.connectionstrings.com/mysql#mysql-connector-net-mysqlconnection
        properties["quartz.dataSource.default.connectionString"] = "Server=localhost;Database=quartz;Uid=xxxx;Pwd=xxxxxx;";
        properties["quartz.dataSource.default.provider"] = "MySql-65"; 

如果我运行一个没有DisallowConcurrentExecution属性的作业，它会按预期运行(即每10秒运行一次)，如下所示……

Hello Job Now=2013-07-04T13:04:16 Next=2013-07-04T13:04:26
Hello Job Now=2013-07-04T13:04:26 Next=2013-07-04T13:04:36
Hello Job Now=2013-07-04T13:04:36 Next=2013-07-04T13:04:46
Hello Job Now=2013-07-04T13:04:46 Next=2013-07-04T13:04:56
Hello Job Now=2013-07-04T13:04:56 Next=2013-07-04T13:05:06

如果我使用DisallowConcurrentExecution属性运行一个作业，它很快就会落后于计划，如下所示……

Hello Job Now=2013-07-04T13:11:00 Next=2013-07-04T13:11:10
Hello Job Now=2013-07-04T13:11:10 Next=2013-07-04T13:11:20
Hello Job Now=2013-07-04T13:11:47 Next=2013-07-04T13:11:30
Hello Job Now=2013-07-04T13:12:17 Next=2013-07-04T13:11:40

如何防止并发执行并让作业按时运行？

Answer 1

这是Quartz.NET中的一个错误，已在版本2.2.3中修复。我建议您升级到最新版本。