private static TableQuery <EventTagEntry> GenerateTaggedMessageQuery(
ReplayTaggedMessages replay)
{
var partitionKeyFilter =
TableQuery.GenerateFilterCondition(
"PartitionKey",
QueryComparisons.Equal,
EventTagEntry.GetPartitionKey(replay.Tag));
var utcTicksTRowKeyFilter =
TableQuery.CombineFilters(
TableQuery.GenerateFilterCondition(
"RowKey",
QueryComparisons.GreaterThan,
$"{replay.FromOffset.ToJournalRowKey()}{EventTagEntry.AsciiIncrementedDelimiter}"),
TableOperators.And,
TableQuery.GenerateFilterCondition(
"RowKey",
QueryComparisons.LessThanOrEqual,
$"{replay.ToOffset.ToJournalRowKey()}{EventTagEntry.Delimiter}"));
var filter =
TableQuery.CombineFilters(
partitionKeyFilter,
TableOperators.And,
utcTicksTRowKeyFilter);
var returnValue = new TableQuery <EventTagEntry>().Where(filter);
return(returnValue);
}
/// <summary>
/// Replays all events with given tag within provided boundaries from current database.
/// </summary>
/// <param name="replay">TBD</param>
/// <returns>TBD</returns>
private async Task <long> ReplayTaggedMessagesAsync(
ReplayTaggedMessages replay)
{
var query = GenerateTaggedMessageQuery(replay);
// While we can specify the TakeCount, the CloudTable client does
// not really respect this fact and will keep pulling results.
query.TakeCount =
replay.Max > int.MaxValue
? int.MaxValue
: (int)replay.Max;
// In order to actually break at the limit we ask for we have to
// keep a separate counter and track it ourselves.
var counter = 0;
TableQuerySegment <EventTagEntry> result = null;
var maxOrderingId = 0L;
do
{
result = await Table.ExecuteQuerySegmentedAsync(query, result?.ContinuationToken);
foreach (var entry in result.Results.OrderBy(x => x.UtcTicks))
{
var deserialized = _serialization.PersistentFromBytes(entry.Payload);
var persistent =
new Persistent(
deserialized.Payload,
deserialized.SequenceNr,
deserialized.PersistenceId,
deserialized.Manifest,
deserialized.IsDeleted,
ActorRefs.NoSender,
deserialized.WriterGuid,
timestamp: entry.UtcTicks);
foreach (var adapted in AdaptFromJournal(persistent))
{
_log.Debug("Sending replayed message: persistenceId:{0} - sequenceNr:{1} - event:{2}",
deserialized.PersistenceId, deserialized.SequenceNr, deserialized.Payload);
replay.ReplyTo.Tell(new ReplayedTaggedMessage(adapted, replay.Tag, entry.UtcTicks), ActorRefs.NoSender);
counter++;
}
maxOrderingId = Math.Max(maxOrderingId, entry.UtcTicks);
}
if (counter >= replay.Max)
{
break;
}
} while (result.ContinuationToken != null);
return(maxOrderingId);
}
private void StartTaggedSubscription(ReplayTaggedMessages msg)
{
long?nullable = msg.FromOffset == 0 ? (long?)null : msg.FromOffset;
_subscriptions.Subscribe(
Sender,
msg.Tag,
nullable,
(int)msg.Max,
@event => new ReplayedTaggedMessage(
_eventAdapter.Adapt(@event),
msg.Tag,
@event.Link?.EventNumber ?? @event.OriginalEventNumber)
);
}
/// <summary>
/// Replays all events with given tag withing provided boundaries from current database.
/// </summary>
/// <param name="replay">TBD</param>
/// <returns>TBD</returns>
private async Task <long> ReplayTaggedMessagesAsync(ReplayTaggedMessages replay)
{
// Limit allows only integer
var limitValue = replay.Max >= int.MaxValue ? int.MaxValue : (int)replay.Max;
var fromSequenceNr = replay.FromOffset;
var toSequenceNr = replay.ToOffset;
var tag = replay.Tag;
// Do not replay messages if limit equal zero
if (limitValue == 0)
{
return(0);
}
var builder = Builders <JournalEntry> .Filter;
var filter = builder.AnyEq(x => x.Tags, tag);
if (fromSequenceNr > 0)
{
filter &= builder.Gt(x => x.Ordering, new BsonTimestamp(fromSequenceNr));
}
if (toSequenceNr != long.MaxValue)
{
filter &= builder.Lte(x => x.Ordering, new BsonTimestamp(toSequenceNr));
}
var sort = Builders <JournalEntry> .Sort.Ascending(x => x.Ordering);
long maxOrderingId = 0;
await _journalCollection.Value
.Find(filter)
.Sort(sort)
.Limit(limitValue)
.ForEachAsync(entry => {
var persistent = new Persistent(entry.Payload, entry.SequenceNr, entry.PersistenceId, entry.Manifest, entry.IsDeleted, ActorRefs.NoSender, null);
foreach (var adapted in AdaptFromJournal(persistent))
{
replay.ReplyTo.Tell(new ReplayedTaggedMessage(adapted, tag, entry.Ordering.Value), ActorRefs.NoSender);
}
maxOrderingId = entry.Ordering.Value;
});
return(maxOrderingId);
}
protected override async Task HandleReplayTaggedMessages(ReplayTaggedMessages req, OracleCommand command)
{
var replyTo = req.ReplyTo;
try
{
var maxSequenceNr = 0L;
var tag = req.Tag;
var toOffset = req.ToOffset;
var fromOffset = req.FromOffset;
var take = Math.Min(toOffset - fromOffset, req.Max);
command.CommandText = ByTagSql;
command.Parameters.Clear();
AddParameter(command, ":Ordering", OracleDbType.Int64, fromOffset);
AddParameter(command, ":Tag", OracleDbType.NVarchar2, "%;" + tag + ";%");
AddParameter(command, ":Take", OracleDbType.Int64, take);
using (var reader = await command.ExecuteReaderAsync())
{
while (await reader.ReadAsync())
{
var persistent = ReadEvent(reader);
var ordering = reader.GetInt64(OrderingIndex);
maxSequenceNr = Math.Max(maxSequenceNr, persistent.SequenceNr);
foreach (var adapted in AdaptFromJournal(persistent))
{
replyTo.Tell(new ReplayedTaggedMessage(adapted, tag, ordering), ActorRefs.NoSender);
}
}
}
replyTo.Tell(new RecoverySuccess(maxSequenceNr));
}
catch (Exception cause)
{
replyTo.Tell(new ReplayMessagesFailure(cause));
}
}
/// <summary>
/// Replays all events with given tag withing provided boundaries from current database.
/// </summary>
/// <param name="replay">TBD</param>
/// <returns>TBD</returns>
private async Task <long> ReplayTaggedMessagesAsync(ReplayTaggedMessages replay)
{
/*
* NOTE: limit is used like a pagination value, not a cap on the amount
* of data returned by a query. This was at the root of https://github.com/akkadotnet/Akka.Persistence.MongoDB/issues/80
*/
// Limit allows only integer
var limitValue = replay.Max >= int.MaxValue ? int.MaxValue : (int)replay.Max;
var fromSequenceNr = replay.FromOffset;
var toSequenceNr = replay.ToOffset;
var tag = replay.Tag;
var builder = Builders <JournalEntry> .Filter;
var seqNoFilter = builder.AnyEq(x => x.Tags, tag);
if (fromSequenceNr > 0)
{
seqNoFilter &= builder.Gt(x => x.Ordering, new BsonTimestamp(fromSequenceNr));
}
if (toSequenceNr != long.MaxValue)
{
seqNoFilter &= builder.Lte(x => x.Ordering, new BsonTimestamp(toSequenceNr));
}
// Need to know what the highest seqNo of this query will be
// and return that as part of the RecoverySuccess message
var maxSeqNoEntry = await _journalCollection.Value.Find(seqNoFilter)
.SortByDescending(x => x.Ordering)
.Limit(1)
.SingleOrDefaultAsync();
if (maxSeqNoEntry == null)
{
return(0L); // recovered nothing
}
var maxOrderingId = maxSeqNoEntry.Ordering.Value;
var toSeqNo = Math.Min(toSequenceNr, maxOrderingId);
var readFilter = builder.AnyEq(x => x.Tags, tag);
if (fromSequenceNr > 0)
{
readFilter &= builder.Gt(x => x.Ordering, new BsonTimestamp(fromSequenceNr));
}
if (toSequenceNr != long.MaxValue)
{
readFilter &= builder.Lte(x => x.Ordering, new BsonTimestamp(toSeqNo));
}
var sort = Builders <JournalEntry> .Sort.Ascending(x => x.Ordering);
await _journalCollection.Value
.Find(readFilter)
.Sort(sort)
.Limit(limitValue)
.ForEachAsync(entry =>
{
var persistent = ToPersistenceRepresentation(entry, ActorRefs.NoSender);
foreach (var adapted in AdaptFromJournal(persistent))
{
replay.ReplyTo.Tell(new ReplayedTaggedMessage(adapted, tag, entry.Ordering.Value),
ActorRefs.NoSender);
}
});
return(maxOrderingId);
}
