。净岩心石英依赖注入

Question

如何在 .net 核心中配置 Quartz 以使用依赖注入？我使用标准的.net核心依赖机制。在实现 IJob 的类的构造函数中，我需要注入一些依赖项。

Answer 1

我知道这是个老问题，但只想补充一个2020年的答案:

https://www.quartz-scheduler.net/documentation/quartz-3.x/packages/microsoft-di-integration.html

https://www.quartz-scheduler.net/documentation/quartz-3.x/packages/aspnet-core-integration.html

我发现它甚至比不使用.NET Core DI的方法更容易。然而，在我必须集成它的项目中，Autofac与MS DI一起使用（不能告诉你为什么），并且它抱怨一些依赖关系，所以我也必须添加以下映射：

services.AddSingleton<ITypeLoadHelper, SimpleTypeLoadHelper>();

我的总体解决方案如下：

services.AddTransient<UpcomingReleasesNotificationJob>();
services.AddSingleton<ITypeLoadHelper, SimpleTypeLoadHelper>();

var jobKey = new JobKey("notificationJob");
services.AddQuartz(q =>
{
   q.SchedulerId = "JobScheduler";
   q.SchedulerName = "Job Scheduler";
   q.UseMicrosoftDependencyInjectionScopedJobFactory();
   q.AddJob<UpcomingReleasesNotificationJob>(j => j.WithIdentity(jobKey));
   q.AddTrigger(t => t
      .WithIdentity("notificationJobTrigger")
      .ForJob(jobKey)
      .StartNow()
      .WithSchedule(CronScheduleBuilder.DailyAtHourAndMinute(14, 00))
   );
});

services.AddQuartzServer(options =>
{
   options.WaitForJobsToComplete = true;
});

Answer 2

受到Rabbans伟大答案的启发，我为Microsoft.Extensions.DependencyInjection创建了一个完整的JobFactory实现：

using Microsoft.Extensions.DependencyInjection;
using Quartz;
using Quartz.Spi;
using System;
using System.Collections.Concurrent;

class JobFactory : IJobFactory
{
    protected readonly IServiceProvider _serviceProvider;

    protected readonly ConcurrentDictionary<IJob, IServiceScope> _scopes = new ConcurrentDictionary<IJob, IServiceScope>();

    public JobFactory(IServiceProvider serviceProvider)
    {
        _serviceProvider = serviceProvider;
    }

    public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
    {
        var scope = _serviceProvider.CreateScope();
        IJob job;

        try
        {
            job = scope.ServiceProvider.GetRequiredService(bundle.JobDetail.JobType) as IJob;
        }
        catch
        {
            // Failed to create the job -> ensure scope gets disposed
            scope.Dispose();
            throw;
        }

        // Add scope to dictionary so we can dispose it once the job finishes
        if (!_scopes.TryAdd(job, scope))
        {
            // Failed to track DI scope -> ensure scope gets disposed
            scope.Dispose();
            throw new Exception("Failed to track DI scope");
        }

        return job;
    }

    public void ReturnJob(IJob job)
    {
        if (_scopes.TryRemove(job, out var scope))
        {
            // The Dispose() method ends the scope lifetime.
            // Once Dispose is called, any scoped services that have been resolved from ServiceProvider will be disposed.
            scope.Dispose();
        }
    }
}

// Prepare the DI container
var services = new ServiceCollection();
// Register job
services.AddTransient<MyJob>();
// Register job dependencies
services.AddTransient<IFoo, Foo>();
var container = services.BuildServiceProvider();

// Create an instance of the job factory
var jobFactory = new JobFactory(container);

// Create a Quartz.NET scheduler
var schedulerFactory = new StdSchedulerFactory(properties);
var scheduler = schedulerFactory.GetScheduler();

// Tell the scheduler to use the custom job factory
scheduler.JobFactory = jobFactory;

该实现已经在一个.NETCore2.1控制台应用程序中通过一个作业进行了测试，效果良好。请随时留下您的反馈或改进建议。。。

Answer 3

您可以使用Quartz.Spi.IJobFactory接口并实现它。Quartz文档指出：

触发触发器时，将通过调度程序上配置的JobFactory实例化与其关联的作业。默认的JobFactory只是激活job类的一个新实例。您可能希望创建自己的JobFactory实现来完成一些事情，例如让应用程序的IoC或DI容器生成/初始化作业实例。请参阅IJobFactory接口和相关的调度程序。SetJobFactory（事实）方法。

ISchedulerFactory schedulerFactory = new StdSchedulerFactory(properties);
var scheduler = schedulerFactory.GetScheduler();

scheduler.JobFactory = jobFactory;

编辑

实现可以如下所示：

public class JobFactory : IJobFactory
{
    protected readonly IServiceProvider Container;

    public JobFactory(IServiceProvider container)
    {
        Container = container;
    }

    public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
    {
        return Container.GetService(bundle.JobDetail.JobType) as IJob;
    }

    public void ReturnJob(IJob job)
    {
        // i couldn't find a way to release services with your preferred DI, 
        // its up to you to google such things
    }
}

要将其与 Microsoft.Extensions.DependencyInjection 一起使用，请按如下方式创建容器：

var services = new ServiceCollection();
services.AddTransient<IAuthorizable, AuthorizeService>();
var container = services.BuildServiceProvider();
var jobFactory = new JobFactory(container);

参考

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石英文档

应用程序接口