Topshelf需要使用Autofac的Quartz作业工厂

Question

我正在尝试将TopShelf与Quartz.net和Autofac一起使用.我下面的代码工作得很好.但是,这一行:

cfg.UsingQuartzJobFactory(() => container.Resolve<IJobFactory>());

似乎是错误的做事方式.有没有更好的方法告诉Topshelf使用自定义autofac jobfactory？jobfactory的生命范围是什么？我担心这行代码会在将来的某个时候引起一些麻烦.如何在不再需要时释放jobfactory？这条线是否正常？

class Poller : IJob
{
    private readonly ILogger _log;

    public Poller(ILogger log)
    {
        _log = log;
        _log.Info("Instantiating...");
    }

    public void Execute(IJobExecutionContext context)
    {
        _log.Info("Executing...");
    }
}

class Program
{
    static Autofac.IContainer BuildContainer()
    {
        var builder = new ContainerBuilder();

        builder.RegisterModule<NLogModule>();
        builder.RegisterModule<QuartzAutofacFactoryModule>();
        builder.RegisterModule(new QuartzAutofacJobsModule(typeof(Poller).Assembly));

        var container = builder.Build();
        return container;
    }

    static void Main(string[] args)
    {
        var container = BuildContainer();

        HostFactory.Run(cfg =>
        {
            cfg.UseNLog();
            cfg.UseAutofacContainer(container);
            cfg.SetDescription("DESCRIPTION");
            cfg.SetDisplayName("DISPLAY");
            cfg.SetServiceName("NAME");

            cfg.UsingQuartzJobFactory(() => container.Resolve<IJobFactory>());

            cfg.ScheduleQuartzJobAsService(q =>
            {
                q.WithJob(() => JobBuilder.Create<Poller>().Build());
                q.AddTrigger(() => TriggerBuilder.Create().WithSimpleSchedule(b => b.WithIntervalInSeconds(20).RepeatForever()).Build());
            });

            cfg.StartAutomatically();
            cfg.RunAsLocalSystem();

        });
    }
}

供参考: TopShelf.Quartz.ScheduleHobHostConfiguratorExtensions

另请参考:Autofac.Extras.Quartz.QuartzAutofacFactoryModule

Answer 1

我认为你应该用容器初始化quartz Server，这个例子使用unity，但我确信它可以与其他容器一起使用。

try
        {
            var container = new UnityContainer();
            schedulerFactory = CreateSchedulerFactory();
            quartzscheduler = GetScheduler();
            SyncPost.Initialize.RepositoryConfig(container);
            SyncPost.Initialize.AddToSchedulerContextCustomVars(quartzscheduler, container);
            quartzscheduler.JobFactory = new JobFactoryInjection(container);

        }
        catch (Exception e)
        {
            logger.Error("Server initialization failed:" + e.Message, e);
            throw;
        }

其中 JobFactoryInjection 实现 IJobFactory：

 public class JobFactoryInjection : IJobFactory
{

        private readonly UnityContainer container = new UnityContainer(); 

        public JobFactoryInjection(UnityContainer container)
        {

            if (container == null) throw new ArgumentNullException("container", "Container is null");
            this.container = container;
        }



    public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler) {


            // Return job registrated in container
            bundle.JobDetail.JobDataMap.Put(SyncUtils.ContextKeyCenterCode, scheduler.Context.Get(SyncUtils.ContextKeyCenterCode));
            return (IJob)container.Resolve(bundle.JobDetail.JobType);

    }

    public void ReturnJob(IJob job) {

    }
}

关于JobFactory的生命周期，不用担心。来自 Quartz 文档：“JobFactory 只是激活作业类的一个新实例。您可能希望创建自己的 JobFactory 实现来完成诸如让应用程序的 IoC 或 DI 容器生成/初始化作业实例之类的事情”