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[英]Dependency injection in Quartz.net Core not finding registered services
[英]Quartz.Net Dependency Injection .Net Core
在我的項目中,我必須使用 Quartz,但我不知道我做錯了什么。
工作工廠:
public class IoCJobFactory : IJobFactory
{
private readonly IServiceProvider _factory;
public IoCJobFactory(IServiceProvider factory)
{
_factory = factory;
}
public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
{
return _factory.GetService(bundle.JobDetail.JobType) as IJob;
}
public void ReturnJob(IJob job)
{
var disposable = job as IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
}
石英擴展:
public static class QuartzExtensions
{
public static void UseQuartz(this IApplicationBuilder app)
{
app.ApplicationServices.GetService<IScheduler>();
}
public static async void AddQuartz(this IServiceCollection services)
{
var props = new NameValueCollection
{
{"quartz.serializer.type", "json"}
};
var factory = new StdSchedulerFactory(props);
var scheduler = await factory.GetScheduler();
var jobFactory = new IoCJobFactory(services.BuildServiceProvider());
scheduler.JobFactory = jobFactory;
await scheduler.Start();
services.AddSingleton(scheduler);
}
}
當我嘗試運行我的工作(類有依賴注入)時,我總是得到異常,因為:
_factory.GetService(bundle.JobDetail.JobType) as IJob;
始終為空。
我的班級實現IJob
並在 startup.cs 中添加:
services.AddScoped<IJob, HelloJob>();
services.AddQuartz();
和
app.UseQuartz();
我使用標准的 .net Core 依賴注入:
using Microsoft.Extensions.DependencyInjection;
這只是我解決 IoC 問題的解決方案的一個簡單示例:
作業工廠.cs
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)
{
(job as IDisposable)?.Dispose();
}
}
啟動文件
public void Configure(IApplicationBuilder app,
IHostingEnvironment env,
ILoggerFactory loggerFactory,
IApplicationLifetime lifetime,
IServiceProvider container)
{
loggerFactory.AddConsole(Configuration.GetSection("Logging"));
loggerFactory.AddDebug();
app.UseMvc();
// the following 3 lines hook QuartzStartup into web host lifecycle
var quartz = new QuartzStartup(container);
lifetime.ApplicationStarted.Register(quartz.Start);
lifetime.ApplicationStopping.Register(quartz.Stop);
}
QuartzStartup.cs
public class QuartzStartup
{
private IScheduler _scheduler; // after Start, and until shutdown completes, references the scheduler object
private readonly IServiceProvider container;
public QuartzStartup(IServiceProvider container)
{
this.container = container;
}
// starts the scheduler, defines the jobs and the triggers
public void Start()
{
if (_scheduler != null)
{
throw new InvalidOperationException("Already started.");
}
var schedulerFactory = new StdSchedulerFactory();
_scheduler = schedulerFactory.GetScheduler().Result;
_scheduler.JobFactory = new JobFactory(container);
_scheduler.Start().Wait();
var voteJob = JobBuilder.Create<VoteJob>()
.Build();
var voteJobTrigger = TriggerBuilder.Create()
.StartNow()
.WithSimpleSchedule(s => s
.WithIntervalInSeconds(60)
.RepeatForever())
.Build();
_scheduler.ScheduleJob(voteJob, voteJobTrigger).Wait();
}
// initiates shutdown of the scheduler, and waits until jobs exit gracefully (within allotted timeout)
public void Stop()
{
if (_scheduler == null)
{
return;
}
// give running jobs 30 sec (for example) to stop gracefully
if (_scheduler.Shutdown(waitForJobsToComplete: true).Wait(30000))
{
_scheduler = null;
}
else
{
// jobs didn't exit in timely fashion - log a warning...
}
}
}
考慮您應該提前將您的服務注冊到容器中(在我的例子中是 VoteJob)。
我根據這個答案實現了這個。
我希望它會有所幫助。
我遇到了同樣的問題。
我更新自
services.AddScoped<IJob, HelloJob>();
到
services.AddScoped<HelloJob>();
那么它的工作原理。
_factory.GetService(bundle.JobDetail.JobType) as IJob;
不會為空 :)
這就是我在我的應用程序中所做的。 我只添加工廠,而不是將調度程序添加到 ioc
services.AddTransient<IJobFactory, AspJobFactory>(
(provider) =>
{
return new AspJobFactory( provider );
} );
我的工作工廠看起來幾乎一樣。 瞬態並不重要,因為無論如何我只使用一次。 我使用 Quartz 擴展方法然后是
public static void UseQuartz(this IApplicationBuilder app, Action<Quartz> configuration)
{
// Job Factory through IOC container
var jobFactory = (IJobFactory)app.ApplicationServices.GetService( typeof( IJobFactory ) );
// Set job factory
Quartz.Instance.UseJobFactory( jobFactory );
// Run configuration
configuration.Invoke( Quartz.Instance );
// Run Quartz
Quartz.Start();
}
Quartz
類也是 Singleton。
Quartz.NET 3.1 將包括對 Microsoft DI 和 ASP.NET Core 托管服務的官方支持。
您可以找到重新訪問的軟件包:
查看正在進行的新 DI 集成的最佳資源是前往示例 ASP.NET Core 應用程序。
https://www.quartz-scheduler.net/2020/07/08/quartznet-3-1-beta-1-released/
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