hangfire后台只能调用public个方法怎么解决？

Question

我在 class 中有方法 public。当我将它添加到 hangfire 时出现编译器错误

Only public methods can be invoked in the background. Ensure your method has the public access modifier, and you aren't using explicit interface implementation.'

  public class JobsService
    {
        public void TestJob2(Parameters parameters)
        {
        }
    }

    public class JobsController : ControllerBase
    {
        private readonly JobsService _jobsService;

        public JobsController(JobsService jobsService)
        {
            _jobsService = jobsService;
        }

       public IActionResult AddOrUpdate([FromQuery]string recurringJobId = "", [FromQuery]string methodName = "", [FromQuery] bool remove = false, [FromQuery] string cronExpression = "*/1 * * * *", [FromBody] Parameters parameters = null)
       {
          Expression<Action> expression = ToExpression(() => { string t = (string)method.Invoke(_jobsService, new object[] { parameters }); });
          RecurringJob.AddOrUpdate(recurringJobId, expression, cronExpression);
       }
    }

Answer 1

lambda 及其参数需要由 Hangfire 序列化。 AFAIK，它的主体必须是一个简单的调用，例如没有方法分配。

执行作业的 JobsService 实例不能是您的控制器引用的实例。我假设你已经为依赖注入设置了 Hangfire see "Using IoC containers", or JobsService can be instantiated without needing any dependency see "Passing dependencies".

您需要为您的 JobsService 添加一个方法 class :

public void InvokeMethod(string methodName, Parameters parameters)
{
    MethodInfo mi = typeof(JobsService).GetMethod(methodName);
    string s = (string)mi.Invoke(this, new[] { parameters });
}

那么，您的 JobsController AddOrUpdate 方法将是：

public IActionResult AddOrUpdate([FromQuery]string recurringJobId = "",[FromQuery]string methodName = "", [FromQuery] bool remove = false, [FromQuery] string cronExpression = "*/1 * * * *", [FromBody] Parameters parameters = null)
{
  RecurringJob.AddOrUpdate<JobsService>(
           recurringJobId, 
           js => js.InvokeMethod(methodName, parameters), 
           () => cronExpression
           );
}

hangfire后台只能调用public个方法怎么解决？

How to resolve Only public methods can be invoked in the background in hangfire?

c#

hangfire