scheduler

type Dispatcher struct {
	TaskChannel     chan Job      // Store all job
	DispatchControl chan bool     // Control add job go routine
	WorkerPool      chan chan Job // Store worker private job channel
	WorkerList      []*Worker     // Store worker instance
	MaxWorker       int           // Max worker number
	IsClosed        bool          // Dispatcher is closed ?
}

type Job func()

type Worker struct {
	Dispatcher *Dispatcher
	JobChannel chan Job
	Quit       chan bool
	ID         int
}