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简述

有时会遇到需要在IJob实现类中依赖注入其他类或接口的情况，但Quartz的默认JobFactory并不能识别具有有参构造函数的IJob实现类，也就无法进行依赖注入

需要被依赖注入的类：

public class TestClass
{public TestClass(Type jobType, string cronExpression){JobType = jobType;CronExpression = cronExpression;}public Type JobType { get; }public string CronExpression { get; }
}

解决方式

1.安装依赖：Quartz、Microsoft.Extensions.DependencyInjection

2.实现接口

        实现IJob接口

    public class MyJob : IJob{private readonly TestClass test;public MyJob(TestClass test){this.test = test;}public Task Execute(IJobExecutionContext context){Console.WriteLine("hello");Console.WriteLine(test.ToString());return Task.CompletedTask;}}

        实现IJobFactory接口

public class MyJobFactory : IJobFactory
{private readonly IServiceProvider _serviceProvider;public MyJobFactory(IServiceProvider serviceProvider){_serviceProvider = serviceProvider;}public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler){return _serviceProvider.GetRequiredService(bundle.JobDetail.JobType) as IJob;}public void ReturnJob(IJob job) { }
}

3.将IJob实现类、IJobFactory实现类、需要被依赖注入的类（TestClass）添加进容器

private static ServiceProvider ConfigureServices()
{var services = new ServiceCollection();services.AddSingleton<MyJob>();services.AddSingleton<IJobFactory, MyJobFactory>();services.AddSingleton(new TestClass(jobType: typeof(MyJob),cronExpression: "0/5 * * * * ?"));return services.BuildServiceProvider();
}

4.将scheduler的JobFactory属性替换为IJobFactory实现类的实例

var scheduler = await StdSchedulerFactory.GetDefaultScheduler();// JobFactory替换为IJobFactory实现类的实例
scheduler.JobFactory = serviceProvider.GetService<IJobFactory>();

5.测试

        static async Task Main(string[] args){var serviceProvider = ConfigureServices();var scheduler = await StdSchedulerFactory.GetDefaultScheduler();// JobFactory替换为IJobFactory实现类的实例scheduler.JobFactory = serviceProvider.GetService<IJobFactory>();var jobSchedule = serviceProvider.GetService<TestClass>();var jobDetail = JobBuilder.Create(jobSchedule.JobType).Build();var trigger = TriggerBuilder.Create().WithCronSchedule(jobSchedule.CronExpression).Build();await scheduler.ScheduleJob(jobDetail, trigger);await scheduler.Start();Thread.Sleep(10000);}