c# – 支持更多日期/时间触发器的调度引擎

然后,您可以为每个单独的任务(或使用委托函数,任务类型)继承Task类,并定义您需要的所有自定义要求,以检查该任务是否需要运行,如果需要,则调用该特定任务的Run()方法.

将所有任务添加到列表<任务>并定期迭代它们以查看实际需要运行的任务,并且瞧;你有一个非常简单但有效的调度程序.

就个人而言,我正在使用基于优先级的调度程序而不是您描述的事件驱动调度程序,因此我实现了一个Func< bool>确定是否需要运行任务以及实际运行它的Action.我的代码如下：

public class Task : IComparable<Task>
{
    public Task(int priority,Action action,Func<bool> needsToRun,string name = "Basic Task")
    {
        Priority = priority;
        Name = name;
        Action = action;
        _needsToRun = needsToRun;
    }

    public string Name { get; set; }

    public int Priority { get; set; }

    private readonly Func<bool> _needsToRun;

    public bool NeedsToRun { get { return _needsToRun.Invoke(); } }

    /// <summary>
    /// Gets or sets the action this task performs.
    /// </summary>
    /// <value>
    /// The action.
    /// </value>
    public Action Action { get; set; }

    public void Run()
    {
        if (Action != null)
            Action.Invoke();
    }

    #region Implementation of IComparable<in State>

    /// <summary>
    /// Compares the current object with another object of the same type.
    /// </summary>
    /// <returns>
    /// A value that indicates the relative order of the objects being compared. The return value has the following meanings: Value Meaning Less than zero This object is less than the <paramref name="other"/> parameter.Zero This object is equal to <paramref name="other"/>. Greater than zero This object is greater than <paramref name="other"/>. 
    /// </returns>
    /// <param name="other">An object to compare with this object.</param>
    public int CompareTo(Task other)
    {
        return Priority == other.Priority && Name == other.Name ? 1 : 0;
    }

    #endregion
}

但我认为这可以适应订阅事件并设置一个标志,以确保每当该事件被轻易触发时NeedsToRun返回true.