我还有工作。每 5 秒运行一次。但如果作业需要超过 5 秒,我需要取消下一个作业并在完成后按计划运行下一个作业。
工作类别:
public class LoggerJob : IJob
{
private readonly ILogger<LoggerJob> _logger;
public LoggerJob(ILogger<LoggerJob> logger)
{
this._logger = logger;
}
public Task Execute(IJobExecutionContext context)
{
//some logic here
_logger.LogInformation($"Log Job: at {DateTime.Now} and Jobtype: {context.JobDetail.JobType}");
return Task.CompletedTask;
}
}
安排班级开始方法:
public async Task StartAsync(CancellationToken cancellationToken)
{
Scheduler = await _schedulerFactory.GetScheduler(cancellationToken);
Scheduler.JobFactory = _jobFactory;
_jobsMetadata?.ForEach(async jobMetadata =>
{
IJobDetail jobDetail = CreateJob(jobMetadata);
ITrigger trigger = CreateTrigger(jobMetadata);
await Scheduler.ScheduleJob(jobDetail, trigger, cancellationToken);
});
await Scheduler.Start(cancellationToken);
}
我尝试了这样的方法,但它只是阻止了其他作业的执行,并且它们等待直到锁定:
public Task Execute(IJobExecutionContext context)
{
lock (_lock)
{
if (!_isRunning)
{
//somelogic
_logger.LogInformation($"Log Job: at {DateTime.Now} and Jobtype: {context.JobDetail.JobType}");
}
else
{
_logger.LogInformation($"Job canceled at {DateTime.Now}");
context.JobDetail.JobDataMap.Put("cancel", true);
}
}
return Task.CompletedTask;
}
使用锁控制作业执行可能会阻塞其他作业,从而导致效率低下。相反,请考虑使用带有取消标记的异步编程以获得更有效的解决方案。通过设置作业执行的超时时间,如果超过指定的时间限制,您可以取消作业。以下是如何调整代码以实现此方法:
public class LoggerJob : IJob
{
private readonly ILogger<LoggerJob> _logger;
private readonly CancellationTokenSource _cancellationTokenSource;
public LoggerJob(ILogger<LoggerJob> logger)
{
_logger = logger;
_cancellationTokenSource = new CancellationTokenSource();
}
public Task Execute(IJobExecutionContext context)
{
// Set a timeout for the job execution
var timeoutTask = Task.Delay(TimeSpan.FromSeconds(5), _cancellationTokenSource.Token);
// Execute the job logic asynchronously
var jobTask = ExecuteJobLogic(context);
// Wait for either the job completion or the timeout
var completedTask = Task.WhenAny(jobTask, timeoutTask);
// Handle the completed task
return completedTask.ContinueWith(task =>
{
if (task == jobTask)
{
// Job completed before timeout, cancel the timeout
_cancellationTokenSource.Cancel();
}
else
{
// Timeout occurred, log cancellation
_logger.LogInformation($"Job canceled due to timeout at {DateTime.Now}");
}
});
}
private async Task ExecuteJobLogic(IJobExecutionContext context)
{
try
{
// Your job logic goes here
_logger.LogInformation($"Log Job: at {DateTime.Now} and Jobtype: {context.JobDetail.JobType}");
await Task.Delay(/* Your job logic */);
}
catch (Exception ex)
{
// Handle any exceptions thrown by the job logic
_logger.LogError(ex, "Error executing job");
}
}
}