public void OnPerforming(PerformingContext filterContext)
{
//设置新的分布式锁,分布式锁会阻止两个相同的任务并发执行，用方法名称和JobName
var jobresource = $"{filterContext.BackgroundJob.Job.Method.Name}.{filterContext.BackgroundJob.Job.Args[1]}";
var locktimeout = TimeSpan.FromSeconds(_timeoutInSeconds);
try
{
var jobItem = filterContext.BackgroundJob.Job.Args.FirstOrDefault();
var job = jobItem as HttpJobItem;
if (job != null)
{
var isCronJob = !string.IsNullOrEmpty(job.Cron);
var key = isCronJob ? job.JobName : filterContext.BackgroundJob.Id;
var conts = filterContext.Connection.GetAllItemsFromSet($"JobPauseOf:{key}");
if (conts.Contains("true"))
{
filterContext.Canceled = true;//任务被暂停不执行直接跳过
return;
}
if (!string.IsNullOrEmpty(job.JobName))
{
filterContext.BackgroundJob.Id.AddTags(job.JobName);
}
}
//设置运行时被设置的参数
try
{
var hashKey = CodingUtil.MD5(filterContext.BackgroundJob.Id + ".runtime");
var excuteDataList = filterContext.Connection.GetAllEntriesFromHash(hashKey);
if (excuteDataList.Any())
{
filterContext.SetJobParameter("runtimeKey", hashKey);
foreach (var keyvalue in excuteDataList)
{
filterContext.SetJobParameter(keyvalue.Key, keyvalue.Value);
}
}
}
catch (Exception)
{
//ignore
}
//申请分布式锁
var distributedLock = filterContext.Connection.AcquireDistributedLock(jobresource, locktimeout);
filterContext.Items["DistributedLock"] = distributedLock;
}
catch (Exception ec)
{
filterContext.Canceled = true;
logger.Info($"[OnPerforming] BackgroundJob.Job.JObName:{filterContext.BackgroundJob.Job.Args[1]} AcquireDistributedLock Timeout,BackgroundJob.Id:{filterContext.BackgroundJob.Id},Exception:{ec}");
}
}
void IServerFilter.OnPerforming(PerformingContext filterContext)
{
var jobId = this.GetJobIdentifier(filterContext.BackgroundJob.Job);
var connection = JobStorage.Current.GetConnection();
var hashEntries = connection.GetAllEntriesFromHash(jobId);
if (hashEntries is null)
{
return;
}
if (hashEntries.TryGetValue(ParameterName, out string lastSuccessUtcString) &&
DateTime.TryParseExact(lastSuccessUtcString, "O", CultureInfo.InvariantCulture, DateTimeStyles.None, out var lastSuccess))
{
filterContext.SetJobParameter(ParameterName, lastSuccess);
}
}
public void OnPerforming(PerformingContext filterContext)
{
Assert.NotNull(filterContext);
if (_cancelsTheCreation)
{
filterContext.Canceled = true;
}
_results.Add(String.Format("{0}::{1}", _name, "OnPerforming"));
if (_setOnPreMethodParameters != null)
{
foreach (var parameter in _setOnPreMethodParameters)
{
filterContext.SetJobParameter(parameter.Key, parameter.Value);
}
}
if (_readParameters != null)
{
foreach (var parameter in _readParameters)
{
Assert.Equal(
parameter.Value,
filterContext.GetJobParameter<string>(parameter.Key));
}
}
if (_throwException)
{
throw new Exception();
}
}