之前写过一篇文件《DotNetCore跨平台~Quartz热部署的福音～监控文件夹的变化》，今天主要把框架优化了一下，支持外部触发，并支持外部将参数以JobDataMap形式进行输入，然后在咱们的Job里进行使用它，故称参数化任务。
Quartz使用场景：
- 定时单次任务：在未来某个时间去执行一次
- 定点任务 ：在某个时间去执行，可以是轮询的
- 周期任务 ：按某个时间间隔去轮询执行
今天说的外部触发的任务是指第一种，即在未来某个时间点去执行，并且只执行一次。说一下思路，这种任务某个JobBase的子类，它需要重写属性IsSingle，将值设为１表示单次任务，然后在Quartz启动后，它会被立即执行，执行完成后，销毁！
用例：你可以在quartz调度中心里对外公开一些方法，让你的Job依赖于某个时间点和参数去执行，执行一次就停止，这样我们的调度就更加灵活了。
为单次任务添加了IsSingle属性
???[DisallowConcurrentExecution()] ???public abstract class JobBase : ISchedulingJob ???{ ???????#region Properties ???????/// <summary> ???????/// 取消资源 ???????/// </summary> ???????public CancellationTokenSource CancellationSource => new CancellationTokenSource(); ???????/// <summary> ???????/// 执行计划，除了立即执行的JOB之后，其它JOB需要实现它 ???????/// </summary> ???????public virtual string Cron => "* * * * * ?"; ???????/// <summary> ???????/// 是否为单次任务，黑为false ???????/// </summary> ???????public virtual bool IsSingle => false; ???????/// <summary> ???????/// Job的名称，默认为当前类名 ???????/// </summary> ???????public virtual string JobName => GetType().Name; ???????/// <summary> ???????/// Job执行的超时时间(毫秒)，默认5分钟 ???????/// </summary> ???????public virtual int JobTimeout => 5 * 60 * 1000; ???????#endregion Properties ???????#region Methods ???????/// <summary> ???????/// Job具体类去实现自己的逻辑 ???????/// </summary> ???????protected abstract void ExcuteJob(IJobExecutionContext context, CancellationTokenSource cancellationSource); ???????/// <summary> ???????/// 当某个job超时时，它将被触发，可以发一些通知邮件等 ???????/// </summary> ???????/// <param name="arg"></param> ???????private void CancelOperation(object arg) ???????{ ???????????CancellationSource.Cancel(); ???????????StdSchedulerFactory.GetDefaultScheduler().Result.Interrupt(new JobKey(JobName)); ???????????Console.WriteLine(JobName + "Job执行超时，已经取消，等待下次调度..."); ???????} ???????#endregion Methods ???????#region IJob 成员 ???????public Task Execute(IJobExecutionContext context) ???????{ ???????????Timer timer = null; ???????????try ???????????{ ???????????????timer = new Timer(CancelOperation, null, JobTimeout, Timeout.Infinite); ???????????????Console.WriteLine(DateTime.Now.ToString() + "{0}这个Job开始执行", context.JobDetail.Key.Name); ???????????????if (context.JobDetail.JobDataMap != null) ???????????????{ ???????????????????foreach (var pa in context.JobDetail.JobDataMap) ???????????????????????Console.WriteLine($"JobDataMap，key：{pa.Key}，value：{pa.Value}"); ???????????????} ???????????????ExcuteJob(context, CancellationSource); ???????????} ???????????catch (Exception ex) ???????????{ ???????????????Console.WriteLine(this.GetType().Name + "error:" + ex.Message); ???????????} ???????????finally ???????????{ ???????????????if (timer != null) timer.Dispose(); ???????????} ???????????return Task.CompletedTask; ???????} ???????#endregion ???}统一的加入Job队列的方法
在我们之前的QuartzManager管理者中，我们需要添加对单次任务的支持，这点我们将任务加入到quartz的代码进行了重构，提取到了方法里。
???????/// <summary> ???????/// 将类型添加到Job队列 ???????/// </summary> ???????/// <param name="type">类型</param> ???????/// <param name="dt">时间点</param> ???????/// <param name="param">参数</param> ???????private static void JoinToQuartz(Type type, DateTimeOffset dt, Dictionary<string, object> param = null) ???????{ ???????????var obj = Activator.CreateInstance(type); ???????????if (obj is ISchedulingJob) ???????????{ ???????????????var tmp = obj as ISchedulingJob; ???????????????string cron = tmp.Cron; ???????????????string name = tmp.JobName; ???????????????var cancel = tmp.CancellationSource; ???????????????var jobDetail = JobBuilder.Create(type) ?????????????????????????????????????????.WithIdentity(name) ?????????????????????????????????????????.Build(); ???????????????if (param != null) ???????????????????foreach (var dic in param) ???????????????????????jobDetail.JobDataMap.Add(dic.Key, dic.Value); ???????????????ITrigger jobTrigger; ???????????????if (tmp.IsSingle) ???????????????{ ???????????????????jobTrigger = TriggerBuilder.Create() ??????????????????????????????????????????????.WithIdentity(name + "Trigger") ??????????????????????????????????????????????.StartAt(dt) ??????????????????????????????????????????????.Build(); ???????????????} ???????????????else ???????????????{ ???????????????????jobTrigger = TriggerBuilder.Create() ???????????????????????????????????????????????.WithIdentity(name + "Trigger") ???????????????????????????????????????????????.StartNow() ???????????????????????????????????????????????.WithCronSchedule(cron) ???????????????????????????????????????????????.Build(); ???????????????} ???????????????StdSchedulerFactory.GetDefaultScheduler().Result.ScheduleJob(jobDetail, jobTrigger, cancel.Token); ???????????????LoggerInfo($"->任务模块{name}被装载...", ConsoleColor.Yellow); ???????????} ???????}对外公开的参数化接口
而对于外界如果希望再次触发这个单次任务，我们可以在QuartzManager里公开一个方法，用来向当前SchedulerFactory里添加新的Job就可以了，这个方法很简单，可以提供一个默认的时间策略，如默认为１分钟后执行，也可以自己控制时间。
/// <summary> ???????/// 任务在1分钟之后被执行1次 ???????/// </summary> ???????/// <param name="type"></param> ???????/// <param name="job"></param> ???????/// <param name="param"></param> ???????public static void SignalJob(Type type, Dictionary<string, object> param) ???????{ ???????????SignalJob(type, DateTimeOffset.Now.AddSeconds(10), param); ???????} ???????/// <summary> ???????/// 任务在某个时间之后被执行1次 ???????/// </summary> ???????/// <param name="type"></param> ???????/// <param name="job"></param> ???????/// <param name="offset"></param> ???????/// <param name="param"></param> ???????public static void SignalJob(Type type, DateTimeOffset offset, Dictionary<string, object> param) ???????{ ???????????JoinToQuartz(type, offset); ???????}那么，现在某个任务调度中心就更加完善了，开发人员在使用时也很简单，只要继承JobBase，或者去实现ISchedulingJob接口就可以了，非常灵活！
感谢各位的阅读！
quartz,dotnet core我们还在继续研究的路上！
DotNetCore跨平台~Quartz定时单次任务
原文地址：http://www.cnblogs.com/lori/p/7525467.html