/// <summary>
/// 执行的后台任务方法。
/// </summary>
/// <returns>返回任务实例。</returns>
public async Task RunAsync()
{
var tasks = (await _taskManager.LoadTasksAsync()).ToList();
if (!tasks.Any())
{
tasks = new List <TaskDescriptor>();
}
foreach (var service in _services)
{
var task = tasks.SingleOrDefault(t => t.Type.Equals(service.GetType().DisplayName()));
if (task == null)
{
task = new TaskDescriptor();
task.Type = service.GetType().DisplayName();
task.Name = service.Name;
task.Description = service.Description;
task.DependenceArgument = service.DependenceArgument;
task.TaskInterval = service.Interval;
task.NextExecuting = DateTime.Now.AddDays(-1);
task.ExtensionName = service.ExtensionName;
await _taskManager.SaveAsync(task);
tasks.Add(task);
}
task.Service = service.ExecuteAsync;
}
await ExecuteAsync(tasks);
}
private async Task ExecuteArgumentAsync(TaskDescriptor task)
{
var argument = await _taskManager.GetArgumentAsync(task.Id);
if (argument != null)
{
try
{
//在服务运行后可以更改当前参数值
if (argument.Args != null)
{
argument.Args.SetArgumentAsync = args => _taskManager.SetArgumentAsync(argument.Id, args);
}
await task.Service(argument.Args);
await _taskManager.SetArgumentAsync(argument.Id);
}
catch (Exception ex)
{
await
_taskManager.SetArgumentAsync(argument.Id, argument.TryTimes + 1,
ex.Message);
_taskManager.LogError(task.Name, ex);
}
}
await Task.Delay(TimeSpan.FromSeconds(1));
}
private async Task ExecuteArgumentAsync(TaskDescriptor task)
{
//for (int i = 0; i < (int)ArgumentStatus.Failured; i++)
//{
var argument = await _taskManager.GetArgumentAsync(task.Id);
if (argument != null)
{
try
{
await task.Service(argument.Args);
await _taskManager.SetArgumentAsync(argument.Id);
}
catch (Exception ex)
{
await
_taskManager.SetArgumentAsync(argument.Id, argument.TryTimes + 1,
ex.Message);
_taskManager.LogError(task.Name, ex);
}
}
await Task.Delay(TimeSpan.FromSeconds(1));
//}
}
/// <summary>
/// 保存后台服务实例对象。
/// </summary>
/// <param name="task">后台服务实例对象。</param>
public async Task SaveAsync(TaskDescriptor task)
{
await _repository.CreateAsync(task);
}