.net核心石英依赖注入

Question

如何在.net内核中配置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

您可以使用该Quartz.Spi.IJobFactory界面并实现它.Quartz文件指出:

触发器触发时,与其关联的作业将通过Scheduler上配置的JobFactory实例化.默认的JobFactory只是激活作业类的新实例.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.请参阅IJobFactory接口和相关的Scheduler.SetJobFactory(fact)方法.

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

scheduler.JobFactory = jobFactory;

编辑

实现可能如下所示:

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Microsoft.Extensions.DependencyInjection像创建容器一样使用它:

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

参考

1. Quartz文档

2. API

Answer 2

我知道这是一个老问题，但只是想添加一个 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

我发现它比不使用 .NET Core DI 的方法更容易。但是，在我必须将它集成的项目中，Autofac 与 MS DI 一起使用（无法告诉您原因）并且它抱怨某些依赖项，因此我还必须添加以下映射：

services.AddSingleton<ITypeLoadHelper, SimpleTypeLoadHelper>();

我的总解决方案如下所示：

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 3

受Rabbans出色答案的启发，我为以下项目创建了JobFactory的完整实现Microsoft.Extensions.DependencyInjection：

实作

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();
        }
    }
}

用法

// 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;

该实现已在.NET Core 2.1控制台应用程序中通过一项工作进行了测试，并且运行良好。随时留下您的反馈或改进建议...