Error Handling

If a work throws an exception and fails to execute, the thrown exception will be recorded. This information can be accessed in callbacks or in WorkEnded and ErrorOccurred event.

callbacks

powerPool.QueueWorkItem(() =>
{
    throw new Exception("Message");
}, (res) =>
{
    if (res.Status == Status.Failed)
    {
        Console.WriteLine(res.Exception.Message);
    }
});

WorkEnded event
Will be invoked after the work has been executed. The event parameters include the information of exception thrown during the execution of the work logic.

powerPool.WorkEnded += (s, e) =>
{
    if (!e.Succeed)
    {
        Console.WriteLine(e.Exception.Message);
    }
};

ErrorOccurred event
Will be invoked after any exception is thrown in the work logic, callbacks, or events (except ErrorOccurred itself). The event parameters include the information of thrown exception.
Just as there is no "recycle bin for the recycle bin", users must catch exceptions thrown in ErrorOccurred themselves. Otherwise, the thread pool will crash.

powerPool.ErrorOccurred += (s, e) =>
{
    if (e.ErrorFrom == ErrorFrom.Callback)
    {
        Console.WriteLine(e.Exception.Message);
    }
};

ErrorFrom

enum ErrorFrom
{
    Callback,
    DefaultCallback,
    PoolStarted,
    PoolIdled,
    RunningWorkerCountChanged,
    WorkStarted,
    WorkEnded,
    PoolTimedOut,
    WorkTimedOut,
    WorkStopped,
    WorkCanceled,
    WorkRejected,
    WorkDiscarded,
    WorkLogic,
}