public async Task <bool> RemoveRow(
GrainReference grainRef,
string reminderName,
string eTag
)
{
var row = await _db
.Reminders
.FirstOrDefaultAsync(a =>
a.ServiceId == _clusterOptions.Value.ServiceId &&
a.GrainId == grainRef.ToKeyString() &&
a.ReminderName == reminderName
);
if (row == null)
{
return(false);
}
if (row.ETag != eTag)
{
throw new OrleansEFReminderException.EtagMismatch(
$"etag mismatch. " +
$"grainId: {grainRef.ToKeyString()} " +
$"reminderName: {reminderName}"
);
}
_db.Reminders.Remove(row);
await _db.SaveChangesAsync();
return(true);
}
public async Task <IGrainState> ClearStateAsync(
string grainType,
GrainReference grainReference,
IGrainState grainState
)
{
try
{
if (string.IsNullOrWhiteSpace(grainType))
{
throw new ArgumentNullException(nameof(grainType));
}
grainReference = grainReference ??
throw new ArgumentNullException(nameof(grainReference));
grainState = grainState ??
throw new ArgumentNullException(nameof(grainState));
grainState.ETag =
null;
grainState.State =
null;
var dbGrain = await _db
.Storage
.FirstOrDefaultAsync(a =>
a.Type == grainType &&
a.PrimaryKey == grainReference.ToKeyString()
);
if (dbGrain == null)
{
return(grainState);
}
_db.Storage.Remove(dbGrain);
await _db.SaveChangesAsync();
return(grainState);
}
catch (Exception e)
{
_logger.LogError(0, e, nameof(ClearStateAsync));
throw;
}
}
/// <summary>
/// delete old silo entries
/// </summary>
/// <param name="beforeDate"></param>
/// <returns></returns>
public async Task CleanupDefunctSiloEntries(DateTimeOffset beforeDate)
{
using (await _semaphore.DisposableWaitAsync())
{
var deadSilos = await _orleansEfContext
.Memberships
.Where(a =>
a.DeploymentId == _clusterOptions.ClusterId &&
a.IAmAliveTime < beforeDate.UtcDateTime
)
.ToListAsync();
deadSilos.ForEach(a =>
_logger.Info(0, $"cleaning up suspected dead silo. address={a.Address}:{a.Port} hostname={a.HostName} last_i_am_alive={a.IAmAliveTime}")
);
_orleansEfContext.Memberships.RemoveRange(deadSilos);
await _orleansEfContext.SaveChangesAsync();
}
}