Question

我试图在.Net Core中优雅地关闭Azure webjobs。现在我创建了一个名为GracefulShutdown的类，如下所示。我把这个班级注册为单身人士。在program.cs中我使用这个类启动webjob。在我的工作中，我得到同一个班级来检查是否要求关机。但我得到的价值总是假的。我认为这里有一些多线程的事情，但我不确定。我做错了什么？

Program.cs的

...
serviceCollection.AddSingleton<IGracefulShutdown, GracefulShutdown>();
...
var gracefulShutdown = serviceProvider.GetService<IGracefulShutdown>();
...
gracefulShutdown.StartJob(config);

GracefulShutdown.cs

public class GracefulShutdown : IGracefulShutdown
{
    private bool gracefulShutdown;

    public bool CheckGracefulShutdownStatus()
    {
        return gracefulShutdown;
    }

    public void StartJob(JobHostConfiguration configuration)
    {
        using (var jobHost = new JobHost(configuration))
        {
            Environment.SetEnvironmentVariable("WEBJOBS_SHUTDOWN_FILE", Directory.GetCurrentDirectory());
            WebJobsShutdownWatcher watcher = new WebJobsShutdownWatcher();
            gracefulShutdown = false;

            Task.Run(() => {
                jobHost.Start();
                while (!gracefulShutdown)
                {
                    if (watcher.Token.IsCancellationRequested)
                    {
                        gracefulShutdown = true;
                        System.Threading.Thread.Sleep(50000);
                    }
                }
            }, watcher.Token).Wait();
        }
    }
}

ProcessorJob.cs

...
private readonly IGracefulShutdown gracefulShutdown;
...
public ProcessorJob(IGracefulShutdown gracefulShutdown)
{
   this.gracefulShutdown = gracefulShutdown;
}
...
if (gracefulShutdown.CheckGracefulShutdownStatus())
{
   return;
}

Answer 1

我的单例具有不同值的问题是在program.cs中调用了两次serviceCollection.BuildServiceProvider（）。当然这不是必需的，并且在重构之后代码可以工作。

我还将布尔变量gracefulShutdown更改为属性。

获取注入类的变量值

1 个答案: