private JsonDocumentsToReplicate GetJsonDocuments(SourceReplicationInformationWithBatchInformation destinationsReplicationInformationForSource, ReplicationStrategy destination, PrefetchingBehavior prefetchingBehavior, ReplicationStatisticsRecorder.ReplicationStatisticsRecorderScope scope)
{
var timeout = TimeSpan.FromSeconds(docDb.Configuration.Replication.FetchingFromDiskTimeoutInSeconds);
var duration = Stopwatch.StartNew();
var result = new JsonDocumentsToReplicate
{
LastEtag = Etag.Empty,
};
try
{
var destinationId = destinationsReplicationInformationForSource.ServerInstanceId.ToString();
var maxNumberOfItemsToReceiveInSingleBatch = destinationsReplicationInformationForSource.MaxNumberOfItemsToReceiveInSingleBatch;
docDb.TransactionalStorage.Batch(actions =>
{
var lastEtag = destinationsReplicationInformationForSource.LastDocumentEtag;
int docsSinceLastReplEtag = 0;
List<JsonDocument> docsToReplicate;
List<JsonDocument> filteredDocsToReplicate;
result.LastEtag = lastEtag;
while (true)
{
docDb.WorkContext.CancellationToken.ThrowIfCancellationRequested();
docsToReplicate = GetDocsToReplicate(actions, prefetchingBehavior, result, maxNumberOfItemsToReceiveInSingleBatch);
filteredDocsToReplicate =
docsToReplicate
.Where(document =>
{
var info = docDb.Documents.GetRecentTouchesFor(document.Key);
if (info != null)
{
if (info.TouchedEtag.CompareTo(result.LastEtag) > 0)
{
log.Debug(
"Will not replicate document '{0}' to '{1}' because the updates after etag {2} are related document touches",
document.Key, destinationId, info.TouchedEtag);
return false;
}
}
string reason;
return destination.FilterDocuments(destinationId, document.Key, document.Metadata, out reason) &&
prefetchingBehavior.FilterDocuments(document);
})
.ToList();
docsSinceLastReplEtag += docsToReplicate.Count;
result.CountOfFilteredDocumentsWhichAreSystemDocuments +=
docsToReplicate.Count(doc => destination.IsSystemDocumentId(doc.Key));
result.CountOfFilteredDocumentsWhichOriginFromDestination +=
docsToReplicate.Count(doc => destination.OriginsFromDestination(destinationId, doc.Metadata));
if (docsToReplicate.Count > 0)
{
var lastDoc = docsToReplicate.Last();
Debug.Assert(lastDoc.Etag != null);
result.LastEtag = lastDoc.Etag;
if (lastDoc.LastModified.HasValue)
result.LastLastModified = lastDoc.LastModified.Value;
}
if (docsToReplicate.Count == 0 || filteredDocsToReplicate.Count != 0)
{
break;
}
log.Debug("All the docs were filtered, trying another batch from etag [>{0}]", result.LastEtag);
if (duration.Elapsed > timeout)
break;
}
log.Debug(() =>
{
if (docsSinceLastReplEtag == 0)
return string.Format("No documents to replicate to {0} - last replicated etag: {1}", destination,
lastEtag);
if (docsSinceLastReplEtag == filteredDocsToReplicate.Count)
return string.Format("Replicating {0} docs [>{1}] to {2}.",
docsSinceLastReplEtag,
lastEtag,
destination);
var diff = docsToReplicate.Except(filteredDocsToReplicate).Select(x => x.Key);
return string.Format("Replicating {1} docs (out of {0}) [>{4}] to {2}. [Not replicated: {3}]",
docsSinceLastReplEtag,
filteredDocsToReplicate.Count,
destination,
string.Join(", ", diff),
lastEtag);
});
scope.Record(new RavenJObject
{
{"StartEtag", lastEtag.ToString()},
{"EndEtag", result.LastEtag.ToString()},
{"Count", docsSinceLastReplEtag},
{"FilteredCount", filteredDocsToReplicate.Count}
});
result.LoadedDocs = filteredDocsToReplicate;
docDb.WorkContext.MetricsCounters.GetReplicationBatchSizeMetric(destination).Mark(docsSinceLastReplEtag);
docDb.WorkContext.MetricsCounters.GetReplicationBatchSizeHistogram(destination).Update(docsSinceLastReplEtag);
result.Documents = new RavenJArray(filteredDocsToReplicate
.Select(x =>
{
JsonDocument.EnsureIdInMetadata(x);
EnsureReplicationInformationInMetadata(x.Metadata, docDb);
return x;
})
.Select(x => x.ToJson()));
});
}
catch (Exception e)
{
scope.RecordError(e);
log.WarnException(
"Could not get documents to replicate after: " +
destinationsReplicationInformationForSource.LastDocumentEtag, e);
}
return result;
}
private JsonDocumentsToReplicate GetJsonDocuments(SourceReplicationInformation destinationsReplicationInformationForSource, ReplicationStrategy destination, PrefetchingBehavior prefetchingBehavior, ReplicationStatisticsRecorder.ReplicationStatisticsRecorderScope scope)
{
var result = new JsonDocumentsToReplicate();
try
{
var destinationId = destinationsReplicationInformationForSource.ServerInstanceId.ToString();
docDb.TransactionalStorage.Batch(actions =>
{
var lastEtag = destinationsReplicationInformationForSource.LastDocumentEtag;
int docsSinceLastReplEtag = 0;
List<JsonDocument> docsToReplicate;
List<JsonDocument> filteredDocsToReplicate;
result.LastEtag = lastEtag;
while (true)
{
docsToReplicate = GetDocsToReplicate(actions, prefetchingBehavior, result);
filteredDocsToReplicate =
docsToReplicate
.Where(document =>
{
var info = docDb.GetRecentTouchesFor(document.Key);
if (info != null)
{
if (info.TouchedEtag.CompareTo(result.LastEtag) > 0)
{
log.Debug(
"Will not replicate document '{0}' to '{1}' because the updates after etag {2} are related document touches",
document.Key, destinationId, info.TouchedEtag);
return false;
}
}
return destination.FilterDocuments(destinationId, document.Key, document.Metadata) &&
prefetchingBehavior.FilterDocuments(document);
})
.ToList();
docsSinceLastReplEtag += docsToReplicate.Count;
result.CountOfFilteredDocumentsWhichAreSystemDocuments +=
docsToReplicate.Count(doc => destination.IsSystemDocumentId(doc.Key));
result.CountOfFilteredDocumentsWhichOriginFromDestination +=
docsToReplicate.Count(doc => destination.OriginsFromDestination(destinationId, doc.Metadata));
if (docsToReplicate.Count > 0)
{
var lastDoc = docsToReplicate.Last();
Debug.Assert(lastDoc.Etag != null);
result.LastEtag = lastDoc.Etag;
if (lastDoc.LastModified.HasValue)
result.LastLastModified = lastDoc.LastModified.Value;
}
if (docsToReplicate.Count == 0 || filteredDocsToReplicate.Count != 0)
{
break;
}
log.Debug("All the docs were filtered, trying another batch from etag [>{0}]", result.LastEtag);
}
log.Debug(() =>
{
if (docsSinceLastReplEtag == 0)
return string.Format("No documents to replicate to {0} - last replicated etag: {1}", destination,
lastEtag);
if (docsSinceLastReplEtag == filteredDocsToReplicate.Count)
return string.Format("Replicating {0} docs [>{1}] to {2}.",
docsSinceLastReplEtag,
lastEtag,
destination);
var diff = docsToReplicate.Except(filteredDocsToReplicate).Select(x => x.Key);
return string.Format("Replicating {1} docs (out of {0}) [>{4}] to {2}. [Not replicated: {3}]",
docsSinceLastReplEtag,
filteredDocsToReplicate.Count,
destination,
string.Join(", ", diff),
lastEtag);
});
scope.Record(new RavenJObject
{
{"StartEtag", lastEtag.ToString()},
{"EndEtag", result.LastEtag.ToString()},
{"Count", docsSinceLastReplEtag},
{"FilteredCount", filteredDocsToReplicate.Count}
});
result.LoadedDocs = filteredDocsToReplicate;
result.Documents = new RavenJArray(filteredDocsToReplicate
.Select(x =>
{
DocumentRetriever.EnsureIdInMetadata(x);
return x;
})
.Select(x => x.ToJson()));
});
}
catch (Exception e)
{
scope.RecordError(e);
log.WarnException(
"Could not get documents to replicate after: " +
destinationsReplicationInformationForSource.LastDocumentEtag, e);
}
return result;
}