public virtual IEnumerable <ICommit> GetFrom(string checkpointToken)
{
Logger.Debug(Messages.GettingAllCommitsFromCheckpoint, checkpointToken);
LongCheckpoint checkpoint = LongCheckpoint.Parse(checkpointToken);
return(QueryCommits <RavenCommitByCheckpoint>(x => x.CheckpointNumber > checkpoint.LongValue, x => x.CheckpointNumber));
}
public void RebuildStarted(IProjection projection, String lastCommitId)
{
var projectionName = projection.GetCommonName();
_checkpoints.Update(
Query.EQ("_id", projectionName),
Update <Checkpoint> .Set(x => x.RebuildStart, DateTime.UtcNow)
.Set(x => x.RebuildStop, null)
.Set(x => x.RebuildTotalSeconds, 0)
.Set(x => x.RebuildActualSeconds, 0)
.Set(x => x.Current, null)
.Set(x => x.Events, 0)
.Set(x => x.Details, null)
);
//Check if some commit was deleted and lastCommitId in Eventstore
//is lower than the latest dispatched commit.
var trackerLastValue = LongCheckpoint.Parse(_checkpointTracker[projection.GetCommonName()]).LongValue;
var lastCommitIdLong = LongCheckpoint.Parse(lastCommitId).LongValue;
if (trackerLastValue > 0)
{
//new projection, it has no dispatched checkpoint.
_slotRebuildTracker[_projectionToSlot[projectionName]] = true;
}
if (lastCommitIdLong < trackerLastValue)
{
_checkpointTracker[projection.GetCommonName()] = lastCommitId;
_checkpoints.Update(
Query.EQ("_id", projectionName),
Update <Checkpoint> .Set(x => x.Value, lastCommitId));
}
_higherCheckpointToDispatchInRebuild = Math.Max(
_higherCheckpointToDispatchInRebuild,
Math.Min(trackerLastValue, lastCommitIdLong));
}
void ConfigureProjections()
{
_checkpointTracker.SetUp(_allProjections, 1);
var lastCommit = GetLastCommitId();
foreach (var slot in _projectionsBySlot)
{
var maxCheckpointDispatchedInSlot = slot.Value
.Select(projection =>
{
var checkpoint = _checkpointTracker.GetCheckpoint(projection);
var longCheckpoint = LongCheckpoint.Parse(checkpoint);
return(longCheckpoint.LongValue);
})
.Max();
foreach (var projection in slot.Value)
{
//Rebuild the slot only if it has at least one dispatched commit
if (_checkpointTracker.NeedsRebuild(projection) && maxCheckpointDispatchedInSlot >= 0)
{
//be sure that projection in rebuild has the same Last dispatched commit fo the entire slot
_checkpointTracker.SetCheckpoint(projection.GetCommonName(), maxCheckpointDispatchedInSlot.ToString());
projection.Drop();
projection.StartRebuild(_rebuildContext);
_checkpointTracker.RebuildStarted(projection, lastCommit);
}
projection.SetUp();
}
}
}
public IEnumerable <ICommit> GetFrom(string bucketId, string checkpointToken)
{
var intCheckpoint = LongCheckpoint.Parse(checkpointToken);
Logger.Debug(Messages.GettingAllCommitsFromBucketAndCheckpoint, bucketId, intCheckpoint.Value);
return(QueryCommits <RavenCommitByCheckpoint>(x => x.BucketId == bucketId && x.CheckpointNumber > intCheckpoint.LongValue, x => x.CheckpointNumber));
}
string GetStartCheckpointForSlot(string slotName)
{
LongCheckpoint min = null;
var projections = _projectionsBySlot[slotName];
foreach (var projection in projections)
{
if (_checkpointTracker.NeedsRebuild(projection))
{
return(null);
}
var currentValue = _checkpointTracker.GetCurrent(projection);
if (currentValue == null)
{
return(null);
}
var currentCheckpoint = LongCheckpoint.Parse(currentValue);
if (min == null || currentCheckpoint.LongValue < min.LongValue)
{
min = currentCheckpoint;
}
}
return(min.Value);
}
string GetStartGlobalCheckpoint()
{
var checkpoints = _projectionsBySlot.Keys.Select(GetStartCheckpointForSlot).Distinct().ToArray();
var min = checkpoints.Any() ? checkpoints.Min(x => LongCheckpoint.Parse(x).LongValue) : 0;
return(new LongCheckpoint(min).Value);
}
public void should_have_a_checkpoint_greater_than_the_previous_commit_on_the_other_process()
{
long chkNum1 = LongCheckpoint.Parse(_commit1.CheckpointToken).LongValue;
long chkNum2 = LongCheckpoint.Parse(_commit2.CheckpointToken).LongValue;
chkNum2.ShouldBeGreaterThan(chkNum1);
}
public static BsonDocument ToMongoCommit(this CommitAttempt commit, LongCheckpoint checkpoint, IDocumentSerializer serializer)
{
int streamRevision = commit.StreamRevision - (commit.Events.Count - 1);
int streamRevisionStart = streamRevision;
IEnumerable <BsonDocument> events = commit
.Events
.Select(e =>
new BsonDocument
{
{ MongoCommitFields.StreamRevision, streamRevision++ },
{ MongoCommitFields.Payload, new BsonDocumentWrapper(typeof(EventMessage), serializer.Serialize(e)) }
});
return(new BsonDocument
{
{ MongoCommitFields.CheckpointNumber, checkpoint.LongValue },
{ MongoCommitFields.CommitId, commit.CommitId },
{ MongoCommitFields.CommitStamp, commit.CommitStamp },
{ MongoCommitFields.Headers, BsonDocumentWrapper.Create(commit.Headers) },
{ MongoCommitFields.Events, new BsonArray(events) },
{ MongoCommitFields.Dispatched, false },
{ MongoCommitFields.StreamRevisionFrom, streamRevisionStart },
{ MongoCommitFields.StreamRevisionTo, streamRevision - 1 },
{ MongoCommitFields.BucketId, commit.BucketId },
{ MongoCommitFields.StreamId, commit.StreamId },
{ MongoCommitFields.CommitSequence, commit.CommitSequence }
});
}
protected override void Context()
{
var commit = Persistence.Commit(Guid.NewGuid().ToString().BuildAttempt());
_checkpointBeforePurge = LongCheckpoint.Parse(commit.CheckpointToken);
Persistence.DeleteStream(commit.StreamId);
Persistence.Purge("default");
}
public Task <ICheckpoint> GetCheckpoint(string checkpointToken)
{
if (string.IsNullOrWhiteSpace(checkpointToken))
{
return(Task.FromResult <ICheckpoint>(new LongCheckpoint(-1)));
}
return(Task.FromResult <ICheckpoint>(LongCheckpoint.Parse(checkpointToken)));
}
public ICheckpoint GetCheckpoint(string checkpointToken)
{
if (string.IsNullOrWhiteSpace(checkpointToken))
{
return(new LongCheckpoint(-1));
}
return(LongCheckpoint.Parse(checkpointToken));
}
public void OnNext(ICommit value)
{
var chkpoint = LongCheckpoint.Parse(value.CheckpointToken).LongValue;
if (chkpoint > _lastCheckpoint)
{
_counter++;
}
_lastCheckpoint = chkpoint;
}
void ConfigureProjections()
{
_checkpointTracker.SetUp(_allProjections, 1);
var lastCommit = GetLastCommitId();
foreach (var slot in _projectionsBySlot)
{
var maxCheckpointDispatchedInSlot = slot.Value
.Select(projection =>
{
var checkpoint = _checkpointTracker.GetCheckpoint(projection);
var longCheckpoint = LongCheckpoint.Parse(checkpoint);
return(longCheckpoint.LongValue);
})
.Max();
foreach (var projection in slot.Value)
{
if (_checkpointTracker.NeedsRebuild(projection))
{
//Check if this slot has ever dispatched at least one commit
if (maxCheckpointDispatchedInSlot > 0)
{
_checkpointTracker.SetCheckpoint(projection.GetCommonName(),
maxCheckpointDispatchedInSlot.ToString());
projection.Drop();
projection.StartRebuild(_rebuildContext);
_checkpointTracker.RebuildStarted(projection, lastCommit);
}
else
{
//this is a new slot, all the projection should execute
//as if they are not in rebuild, because they are new
//so we need to immediately stop rebuilding.
projection.StopRebuild();
}
}
projection.SetUp();
}
}
var errors = _checkpointTracker.GetCheckpointErrors();
if (errors.Any())
{
StringBuilder fullError = new StringBuilder();
foreach (var error in errors)
{
Logger.ErrorFormat("CheckpointError: {0}", error);
fullError.AppendLine(error);
}
throw new Exception(String.Format("Found {0} errors in checkpoint status: {1}", errors.Count, fullError.ToString()));
}
}
public IEnumerable <ICommit> GetFrom(string checkpointToken)
{
Logger.Debug(Resources.GettingAllCommitsFromCheckpoint, checkpointToken);
ICheckpoint checkpoint = LongCheckpoint.Parse(checkpointToken);
return(_buckets
.Values
.SelectMany(b => b.GetCommits())
.Where(c => c.Checkpoint.CompareTo(checkpoint) > 0)
.OrderBy(c => c.Checkpoint)
.ToArray());
}
public CheckPointReplayStatus GetCheckpointStatus(string id, string checkpoint)
{
string lastDispatched = _checkpointTracker[id];
var currentCheckpointValue = LongCheckpoint.Parse(checkpoint).LongValue;
long lastDispatchedValue = LongCheckpoint.Parse(lastDispatched).LongValue;
bool isLast = currentCheckpointValue == lastDispatchedValue;
bool isReplay = currentCheckpointValue <= lastDispatchedValue;
_checkpointSlotTracker[_projectionToSlot[id]] = _higherCheckpointToDispatchInRebuild - currentCheckpointValue;
return(new CheckPointReplayStatus(isLast, isReplay));
}
public IEnumerable <ICommit> GetFrom(string checkpointToken)
{
LongCheckpoint checkpoint = LongCheckpoint.Parse(checkpointToken);
Logger.Debug(Messages.GettingAllCommitsFromCheckpoint, checkpointToken);
return(ExecuteQuery(query =>
{
string statement = _dialect.GetCommitsFromCheckpoint;
query.AddParameter(_dialect.CheckpointNumber, checkpoint.LongValue);
return query.ExecutePagedQuery(statement, (q, r) => { })
.Select(x => x.GetCommit(_serializer, _dialect));
}));
}
public void SetUp(IProjection[] projections, int version)
{
var versionInfo = _checkpoints.FindOneById("VERSION");
if (versionInfo == null)
{
versionInfo = new Checkpoint("VERSION", "0");
}
int currentVersion = int.Parse(versionInfo.Value);
string projectionStartFormCheckpointValue = new LongCheckpoint(0).Value;
if (currentVersion == 0)
{
var eventsVersion = _checkpoints.FindOneById("events");
if (eventsVersion != null)
{
projectionStartFormCheckpointValue = eventsVersion.Value;
}
}
//set all projection to active = false
_checkpoints.Update(
Query <Checkpoint> .NE(c => c.Slot, null),
Update <Checkpoint> .Set(c => c.Active, false),
UpdateFlags.Multi
);
foreach (var projection in projections)
{
Add(projection, projectionStartFormCheckpointValue);
}
// mark db
if (version > currentVersion)
{
versionInfo.Value = new LongCheckpoint(version).Value;
_checkpoints.Save(versionInfo);
}
foreach (var slot in projections.Select(p => p.GetSlotName()).Distinct())
{
var slotName = slot;
MetricsHelper.SetCheckpointCountToDispatch(slot, () => GetCheckpointCount(slotName));
_checkpointSlotTracker[slot] = 0;
_slotRebuildTracker[slot] = false;
}
MetricsHelper.SetCheckpointCountToDispatch("", GetCheckpointMaxCount);
}
public IEnumerable <ICommit> GetFrom(string bucketId, string checkpointToken)
{
LongCheckpoint checkpoint = LongCheckpoint.Parse(checkpointToken);
Logger.Debug(Messages.GettingAllCommitsFromBucketAndCheckpoint, bucketId, checkpointToken);
return(this.ExecuteQuery(query =>
{
string statement = this._dialect.GetCommitsFromBucketAndCheckpoint;
query.AddParameter(this._dialect.BucketId, bucketId, DbType.AnsiString);
query.AddParameter(this._dialect.CheckpointNumber, checkpoint.LongValue);
return query.ExecutePagedQuery(statement, (q, r) => { })
.Select(x => x.GetCommit(this._serializer, this._dialect));
}));
}
private void Init()
{
_maxDispatchedCheckpoint = 0;
DumpProjections();
TenantContext.Enter(_config.TenantId);
_housekeeper.Init();
_eventstore = Wireup
.Init()
.LogTo(t => new NEventStoreLog4NetLogger(LoggerFactory.Create(t)))
.UsingMongoPersistence(() => _config.EventStoreConnectionString, new DocumentObjectSerializer())
.InitializeStorageEngine()
.Build();
ConfigureProjections();
// cleanup
_housekeeper.RemoveAll(_eventstore.Advanced);
var allSlots = _projectionsBySlot.Keys.ToArray();
//recreate all polling clients.
foreach (var bucket in _config.BucketInfo)
{
var client = _pollingClientFactory(_eventstore.Advanced);
_clients.Add(client);
_bucketToClient.Add(bucket, client);
}
foreach (var slotName in allSlots)
{
MetricsHelper.CreateMeterForDispatcherCountSlot(slotName);
var startCheckpoint = GetStartCheckpointForSlot(slotName);
Logger.InfoFormat("Slot {0} starts from {1}", slotName, startCheckpoint);
var name = slotName;
//find right consumer
var slotBucket = _config.BucketInfo.SingleOrDefault(b =>
b.Slots.Any(s => s.Equals(slotName, StringComparison.OrdinalIgnoreCase))) ??
_config.BucketInfo.Single(b => b.Slots[0] == "*");
var client = _bucketToClient[slotBucket];
client.AddConsumer(commit => DispatchCommit(commit, name, LongCheckpoint.Parse(startCheckpoint)));
}
MetricsHelper.SetProjectionEngineCurrentDispatchCount(() => _countOfConcurrentDispatchingCommit);
}
public IEnumerable <ICommit> GetFrom(string checkpointToken)
{
var intCheckpoint = LongCheckpoint.Parse(checkpointToken);
Logger.Debug(Messages.GettingAllCommitsFromCheckpoint, intCheckpoint.Value);
return(TryMongo(() => PersistedCommits
.Find(
Query.And(
Query.NE(MongoCommitFields.BucketId, MongoSystemBuckets.RecycleBin),
Query.GT(MongoCommitFields.CheckpointNumber, intCheckpoint.LongValue)
)
)
.SetSortOrder(MongoCommitFields.CheckpointNumber)
.Select(x => x.ToCommit(_serializer))
));
}
private void Init()
{
_maxDispatchedCheckpoint = 0;
DumpProjections();
_stopping = new ManualResetEventSlim(false);
TenantContext.Enter(_config.TenantId);
_housekeeper.Init();
_eventstore = Wireup
.Init()
.LogTo(t => new NEventStoreLog4NetLogger(LoggerFactory.Create(t)))
.UsingMongoPersistence(() => _config.EventStoreConnectionString, new DocumentObjectSerializer())
.InitializeStorageEngine()
.Build();
ConfigureProjections();
// cleanup
_housekeeper.RemoveAll(_eventstore.Advanced);
var allSlots = _projectionsBySlot.Keys.ToArray();
_client.Create(_eventstore.Advanced, _config.PollingMsInterval);
var subscriptions = new List <IDisposable>();
_observeCommits = _client.ObserveFrom(GetStartGlobalCheckpoint());
foreach (var slotName in allSlots)
{
MetricsHelper.CreateMeterForDispatcherCountSlot(slotName);
var startCheckpoint = GetStartCheckpointForSlot(slotName);
Logger.InfoFormat("Slot {0} starts from {1}", slotName, startCheckpoint);
var name = slotName;
subscriptions.Add(
_observeCommits.Subscribe(commit => DispatchCommit(commit, name, LongCheckpoint.Parse(startCheckpoint)),
HandleError));
}
_subscriptions = subscriptions.ToArray();
}
public MongoPersistenceEngine(MongoDatabase store, IDocumentSerializer serializer, MongoPersistenceOptions options)
{
if (store == null)
{
throw new ArgumentNullException("store");
}
if (serializer == null)
{
throw new ArgumentNullException("serializer");
}
if (options == null)
{
throw new ArgumentNullException("options");
}
_store = store;
_serializer = serializer;
_options = options;
// set config options
_commitSettings = _options.GetCommitSettings();
_snapshotSettings = _options.GetSnapshotSettings();
_streamSettings = _options.GetStreamSettings();
_insertCommitWriteConcern = _options.GetInsertCommitWriteConcern();
_getLastCheckPointNumber = () => TryMongo(() =>
{
var max = PersistedCommits
.FindAll()
.SetFields(Fields.Include(MongoCommitFields.CheckpointNumber))
.SetSortOrder(SortBy.Descending(MongoCommitFields.CheckpointNumber))
.SetLimit(1)
.FirstOrDefault();
return(max != null ? max[MongoCommitFields.CheckpointNumber].AsInt64 : 0L);
});
_getNextCheckpointNumber = () => new LongCheckpoint(_getLastCheckPointNumber() + 1L);
_updateScript = new BsonJavaScript("function (x){ return insertCommit(x);}");
_checkpointZero = new LongCheckpoint(0);
}
public ICheckpoint ParseCheckpoint(string checkpointValue)
{
return(LongCheckpoint.Parse(checkpointValue));
}
public void should_have_checkpoint_equal_to_two()
{
LongCheckpoint.Parse(_commit.CheckpointToken).LongValue.ShouldBe(2);
}
public ICheckpoint GetCheckpoint(string checkpointToken = null)
{
return(LongCheckpoint.Parse(checkpointToken));
}
public void should_have_correct_checkpoint()
{
LongCheckpoint.Parse(_checkpointToken).LongValue.ShouldBe(Clients * Iterations + 1);
}
public void last_deleted_commit_has_the_higher_checkpoint_number()
{
LongCheckpoint.Parse(_commits[0].CheckpointToken).LongValue.ShouldBe(4);
}
protected override void Because()
{
var commit = Persistence.Commit(Guid.NewGuid().ToString().BuildAttempt());
_checkpointAfterPurge = LongCheckpoint.Parse(commit.CheckpointToken);
}
public Task <ICheckpoint> GetCheckpoint(string checkpointToken = null)
{
return(Task.FromResult <ICheckpoint>(LongCheckpoint.Parse(checkpointToken)));
}
public ICheckpoint GetCheckpoint(string checkpointToken)
{
return(string.IsNullOrWhiteSpace(checkpointToken) ? null : LongCheckpoint.Parse(checkpointToken));
}
