Quartz.NET笔记（二） Jobs And Triggers

The Quartz API

Quartz API 中主要的接口与类：

• IScheduler - the main API for interacting with the scheduler.
• IJob - an interface to be implemented by components that you wish to have executed by the scheduler.
• IJobDetail - used to define instances of Jobs.
• ITrigger - a component that defines the schedule upon which a given Job will be executed.
• JobBuilder - used to define/build JobDetail instances, which define instances of Jobs.
• TriggerBuilder - used to define/build Trigger instances.

Scheduler的生命周期以SchedulerFactory的Create（）和Shutdown（）为界。一旦创建IScheduler接口，他就可以被用来add，remove，list jobs和Triggers，和执行其他与调度相关的操作（比如暂停一个trigger）。但是，调度器实际上不会再任何触发器上执行直到启动Start()方法。

 1  // define the job and tie it to our HelloJob class
 2     IJobDetail job = JobBuilder.Create<HelloJob>()
 3         .WithIdentity("myJob", "group1") // name "myJob", group "group1"
 4         .Build();
 5 
 6     // Trigger the job to run now, and then every 40 seconds
 7     ITrigger trigger = TriggerBuilder.Create()
 8         .WithIdentity("myTrigger", "group1")
 9         .StartNow()
10         .WithSimpleSchedule(x => x
11             .WithIntervalInSeconds(40)
12             .RepeatForever())            
13         .Build();
14 
15     // Tell quartz to schedule the job using our trigger
16     sched.scheduleJob(job, trigger);

调度器执行有以下方式：

• WithCalendarIntervalSchedule
• WithCronSchedule
• WithDailyTimeIntervalSchedule
• WithSimpleSchedule

Jobs and Triggers

Job是实现IJob接口的类。

IJob Interface

1   namespace Quartz
2     {
3         public interface IJob
4         {
5             void Execute(JobExecutionContext context);
6         }
7     }

JobExecutionContext：

JobDetail：

Trigger：触发器。用于触发jobs的执行。当调度一个job时，实例化一个trigger并且‘调整’它的属性供给调度。Trigger还有JobDataMap与它们关联--这对于将参数传递给Job非常有用。Quartz附带不同的触发器类型，最经常被用到的是SimpleTrigger (interface ISimpleTrigger) and CronTrigger (interface ICronTrigger).

SimpleTrigger： SimpleTrigger是非常方便的如果你需要 '一次性' 的执行（在给定的时刻单一的执行一个job）,或者在给定的时间出发一个job。

CronTrigger ：以日历为基础触发。