public override void Commit()
{
_storage.UseStatelessSessionInTransaction(session =>
{
foreach (var command in _commandQueue)
{
command(session);
//does nothing
}
});
}
public void Execute(CancellationToken cancellationToken)
{
Logger.DebugFormat("Aggregating records in '{0}' table", _tableName);
long removedCount = 0;
do
{
_storage.UseStatelessSessionInTransaction(session =>
{
var counters = session.Query <_Counter>().Take(NumberOfRecordsInSinglePass).ToList();
if (counters.Any())
{
var countersByName = counters.GroupBy(counter => counter.Key)
.Select(i =>
new
{
i.Key,
value = i.Sum(counter => counter.Value),
expireAt = i.Max(counter => counter.ExpireAt)
})
.ToList();
foreach (var item in countersByName)
{
session.UpsertEntity <_AggregatedCounter>(i => i.Key == item.Key,
n =>
{
n.ExpireAt = MaxOfDateTimes(n.ExpireAt, item.expireAt);
n.Value += item.value;
}, n => { n.Key = item.Key; });
}
removedCount =
session.DeleteByInt32Id <_Counter>(counters.Select(counter => counter.Id)
.ToArray());
}
});
if (removedCount >= NumberOfRecordsInSinglePass)
{
cancellationToken.Wait(DelayBetweenPasses);
cancellationToken.ThrowIfCancellationRequested();
}
} while (removedCount >= NumberOfRecordsInSinglePass);
Logger.TraceFormat($"Records from the '{_tableName}' aggregated.");
cancellationToken.Wait(_storage.Options.CountersAggregateInterval);
}
internal void Initialize()
{
var started = Stopwatch.StartNew();
do
{
if (SqlUtil.WrapForTransaction(() => SqlUtil.WrapForDeadlock(_cancellationToken, () =>
{
var done = TryLock(() =>
{
var result = false;
_storage.UseStatelessSessionInTransaction(session =>
{
var distributedLock = session.Query <_DistributedLock>()
.FirstOrDefault(i => i.Resource == _resource);
var utcNow = session.Storage.UtcNow;
var expireAtAsLong = utcNow.Add(_timeout).ToEpochDate();
if (distributedLock == null)
{
distributedLock = new _DistributedLock
{
CreatedAt = utcNow,
Resource = _resource,
ExpireAtAsLong = expireAtAsLong
};
session.Insert(distributedLock);
_lockId = distributedLock.Id;
result = true;
if (Logger.IsDebugEnabled())
{
Logger.Debug($"Inserted row for distributed lock '{_resource}'");
}
}
else if (distributedLock.ExpireAtAsLong < utcNow.ToEpochDate())
{
distributedLock.CreatedAt = utcNow;
distributedLock.ExpireAtAsLong = expireAtAsLong;
session.Update(distributedLock);
if (Logger.IsDebugEnabled())
{
Logger.Debug($"Re-used row for distributed lock '{_resource}'");
}
_lockId = distributedLock.Id;
result = true;
}
});
return(result);
}, () => false);
return(done);
}, _options)))
{
if (Logger.IsDebugEnabled())
{
Logger.DebugFormat("Granted distributed lock '{0}'", _resource);
}
return;
}
if (started.Elapsed > _timeout)
{
break;
}
if (Logger.IsDebugEnabled())
{
Logger.Debug(
$"Will poll for distributed lock '{_resource}' in {_options.DistributedLockPollInterval}.");
}
_cancellationToken.Wait(_options.DistributedLockPollInterval);
} while (true);
//dont change this. Hangfire looks for resource name in exception properties
throw new DistributedLockTimeoutException(_resource);
}
