public void Save(Checkpoint checkpoint)
{
collection.Update(
Query<ProjectionCheckpointDto>
.EQ(c => c.Id, checkpoint.Mode),
Update<ProjectionCheckpointDto>
.Set(c => c.CommitIdProcessed, checkpoint.CommitIdProcessed)
.Set(c => c.CommitStampProcessed, checkpoint.CommitStampProcessed));
}
public void Save(Checkpoint checkpoint)
{
using (var con = db.OpenDbConnection())
{
con.Update(new ProjectionCheckpointDto
{
Mode = checkpoint.Mode,
CommitIdProcessed = checkpoint.CommitIdProcessed,
CommitStampProcessed = checkpoint.CommitStampProcessed
});
}
}
public void Save(Checkpoint checkpoint)
{
using (var con = db.OpenDbConnection())
{
using (IDbCommand cmd = con.CreateCommand())
{
cmd.CommandText = "UPDATE ProjectionCheckpointDto SET CommitIdProcessed = @CommitId, CommitStampProcessed = @CommitStamp WHERE Mode = @Mode";
AddParam(cmd, "@CommitId", DbType.Guid, checkpoint.CommitIdProcessed);
AddParam(cmd, "@CommitStamp", DbType.DateTime, checkpoint.CommitStampProcessed);
AddParam(cmd, "@Mode", DbType.String, checkpoint.Mode);
cmd.ExecuteNonQuery();
}
}
}
public CheckpointStoreMock MockLoad(string mode, Checkpoint result)
{
checkpoints[mode] = result;
return this;
}
public void Save(Checkpoint checkpoint)
{
checkpoints[checkpoint.Mode] = checkpoint;
}
private void Rebuild(Checkpoint from, Checkpoint to, IEnumerable<IProjection> rawProjections)
{
var projections = rawProjections.Select(e => new ProjectionWrapper(e, log)).ToArray();
if (!projections.Any())
{
return;
}
if (from.IsUndefined)
{
foreach (var projection in projections)
projection.Clear();
}
DateTime start;
if (from.IsUndefined)
{
start = new DateTime(2013, 1, 1);
}
else
{
start = from.CommitStampProcessed.Value.AddSeconds(-2);
}
foreach (var projection in projections)
projection.Begin();
var commits = historyReader.Read(start, DateTime.UtcNow);
commits = FilterByCheckpoints(commits, from, to);
commits = PauseAware(commits, from);
commits = ShowLogs(commits, from, to, projections);
foreach (var commit in commits)
RebuildCommit(commit, projections);
foreach (var projection in projections)
projection.Flush();
}
private IEnumerable<Commit> ShowLogs(IEnumerable<Commit> commits, Checkpoint from, Checkpoint to, ProjectionWrapper[] projections)
{
bool first = true;
ICommit commitProcessed = null;
long noOfCommits = 0;
Stopwatch timer = new Stopwatch();
timer.Start();
foreach (var commit in commits)
{
noOfCommits++;
if (first)
{
if (from.IsUndefined)
log.Info("Rebuild started from the beginning");
else
log.Info(string.Format("Rebuild started from {0} due to checkpoint {1}", commit.CommitId, from));
first = false;
}
yield return commit;
commitProcessed = commit;
if (noOfCommits % 1000 == 0)
log.Info(string.Format("{0} commits were processed {1}", noOfCommits, timer.Elapsed));
if (noOfCommits % 10000 == 0)
log.Debug("Projection statistics" + Environment.NewLine + ProjectionWrapper.GetStatistic(projections, take: 3));
}
if (commitProcessed != null)
{
log.Info(string.Format("{0} commits were processed {1:mm\\:ss\\.ff}", noOfCommits, timer.Elapsed));
if (to.IsUndefined)
log.Info(string.Format("Rebuild finished on the end {0}", commitProcessed.CommitId));
else
log.Info(string.Format("Rebuild finished on checkpoint {0}", to));
log.Info("Projection statistics" + Environment.NewLine + ProjectionWrapper.GetStatistic(projections, take: 20, takeEvents: 5));
}
}
private IEnumerable<Commit> PauseAware(IEnumerable<Commit> commits, Checkpoint from)
{
ICommit commitProcessed = null;
foreach (var commit in commits)
{
if (commit.Headers.ContainsKey("SagaType"))
continue;
yield return commit;
commitProcessed = commit;
if (running.IsCancellationRequested)
break;
}
if (commitProcessed != null)
{
from.Set(commitProcessed);
if (running.IsCancellationRequested == false && from.Mode == Checkpoint.PROJECTION_CHANGE)
{
from.Set(null);
}
checkpoints.Save(from);
}
}
private IEnumerable<Commit> FilterByCheckpoints(IEnumerable<Commit> commits, Checkpoint from, Checkpoint to)
{
bool startFound = from.IsUndefined;
foreach (var commit in commits)
{
if (!startFound)
{
if (from.IsProcessed(commit))
{
startFound = true;
}
continue;
}
yield return commit;
if (!to.IsUndefined && to.IsProcessed(commit))
yield break;
}
if (!startFound)
throw new Exception(string.Format("Checkpoint {0} {1} can not be found. At the end", from.CommitIdProcessed, from.CommitStampProcessed));
}
