private bool RequeueJobIfTimedOut(RedisConnection connection, string jobId, string queue)
{
var flags = connection.Redis.GetValuesFromHash(
String.Format(RedisStorage.Prefix + "job:{0}", jobId),
"Fetched",
"Checked");
var fetched = flags[0];
var @checked = flags[1];
if (String.IsNullOrEmpty(fetched) && String.IsNullOrEmpty(@checked))
{
// If the job does not have these flags set, then it is
// in the implicit 'Fetched' state. This state has no
// information about the time it was fetched. So we
// can not do anything with the job in this state, because
// there are two options:
// 1. It is going to move to the implicit 'Fetched' state
// in a short time.
// 2. It will stay in the 'Fetched' state forever due to
// its processing server is dead.
// To ensure its server is dead, we'll move the job to
// the implicit 'Checked' state with the current timestamp
// and will not do anything else at this pass of the watcher.
// If job's state will still be 'Checked' on the later passes
// and after the CheckedTimeout expired, then the server
// is dead, and we'll re-queue the job.
connection.Redis.SetEntryInHash(
String.Format(RedisStorage.Prefix + "job:{0}", jobId),
"Checked",
JobHelper.SerializeDateTime(DateTime.UtcNow));
// Checkpoint #1-2. The job is in the implicit 'Checked' state.
// It will be re-queued after the CheckedTimeout will be expired.
}
else
{
if (TimedOutByFetchedTime(fetched) || TimedOutByCheckedTime(fetched, @checked))
{
var fetchedJob = new RedisFetchedJob(connection.Redis, jobId, queue);
fetchedJob.Dispose();
return(true);
}
}
return(false);
}
private bool RequeueJobIfTimedOut(RedisConnection connection, string jobId, string queue)
{
var flags = connection.Redis.GetValuesFromHash(
String.Format(RedisStorage.Prefix + "job:{0}", jobId),
"Fetched",
"Checked");
var fetched = flags[0];
var @checked = flags[1];
if (String.IsNullOrEmpty(fetched) && String.IsNullOrEmpty(@checked))
{
// If the job does not have these flags set, then it is
// in the implicit 'Fetched' state. This state has no
// information about the time it was fetched. So we
// can not do anything with the job in this state, because
// there are two options:
// 1. It is going to move to the implicit 'Fetched' state
// in a short time.
// 2. It will stay in the 'Fetched' state forever due to
// its processing server is dead.
// To ensure its server is dead, we'll move the job to
// the implicit 'Checked' state with the current timestamp
// and will not do anything else at this pass of the watcher.
// If job's state will still be 'Checked' on the later passes
// and after the CheckedTimeout expired, then the server
// is dead, and we'll re-queue the job.
connection.Redis.SetEntryInHash(
String.Format(RedisStorage.Prefix + "job:{0}", jobId),
"Checked",
JobHelper.SerializeDateTime(DateTime.UtcNow));
// Checkpoint #1-2. The job is in the implicit 'Checked' state.
// It will be re-queued after the CheckedTimeout will be expired.
}
else
{
if (TimedOutByFetchedTime(fetched) || TimedOutByCheckedTime(fetched, @checked))
{
var fetchedJob = new RedisFetchedJob(connection.Redis, jobId, queue);
fetchedJob.Dispose();
return true;
}
}
return false;
}