public override bool TryResolve(string id, RavenJObject metadata, RavenJObject document, JsonDocument existingDoc, Func <string, JsonDocument> getDocument)
{
var existingDocumentIsInConflict = existingDoc.Metadata[Constants.RavenReplicationConflict] != null;
var existingDocumentIsDeleted = existingDoc.Metadata[Constants.RavenDeleteMarker] != null &&
existingDoc.Metadata[Constants.RavenDeleteMarker].Value <bool>();
if (existingDocumentIsInConflict && existingDocumentIsDeleted == false)
{
var conflictIds =
existingDoc.DataAsJson.Value <RavenJArray>("Conflicts")
.Select(x => x.Value <string>())
.ToArray();
if (conflictIds.Length == 0)
{
return(false);
}
return
(conflictIds
.Select(getDocument)
.All(doc => Historian.IsDirectChildOfCurrent(metadata, doc.Metadata)));
}
return(false);
}
public ConflictItem Check(string fileName, RavenJObject localMetadata, RavenJObject remoteMetadata, string remoteServerUrl)
{
if (Historian.IsDirectChildOfCurrent(localMetadata, remoteMetadata))
{
return(null);
}
return
(new ConflictItem
{
CurrentHistory = TransformToFullConflictHistory(localMetadata),
RemoteHistory = TransformToFullConflictHistory(remoteMetadata),
FileName = fileName,
RemoteServerUrl = remoteServerUrl
});
}
public override bool TryResolve(string id, RavenJObject metadata, byte[] data, Attachment existingAttachment,
Func <string, Attachment> getAttachment, out RavenJObject metadataToSave,
out byte[] dataToSave)
{
var existingAttachmentIsInConflict = existingAttachment.Metadata[Constants.RavenReplicationConflict] != null;
var existingAttachmentIsDeleted = existingAttachment.Metadata[Constants.RavenDeleteMarker] != null &&
existingAttachment.Metadata[Constants.RavenDeleteMarker].Value <bool>();
metadataToSave = null;
dataToSave = null;
if (existingAttachmentIsInConflict && existingAttachmentIsDeleted == false)
{
var conflictIds =
existingAttachment.Data().ToJObject().Value <RavenJArray>("Conflicts")
.Select(x => x.Value <string>())
.ToArray();
if (conflictIds.Length == 0)
{
return(false);
}
if (conflictIds
.Select(getAttachment)
.All(doc => Historian.IsDirectChildOfCurrent(metadata, doc.Metadata)) == false)
{
return(false);
}
metadataToSave = metadata;
dataToSave = data;
return(true);
}
return(false);
}
public void Replicate(string id, RavenJObject metadata, TExternal incoming)
{
if (metadata.Value <bool>(Constants.RavenDeleteMarker))
{
ReplicateDelete(id, metadata, incoming);
return;
}
TInternal existingItem;
Guid existingEtag;
var existingMetadata = TryGetExisting(id, out existingItem, out existingEtag);
if (existingMetadata == null)
{
log.Debug("New item {0} replicated successfully from {1}", id, Src);
AddWithoutConflict(id, null, metadata, incoming);
return;
}
// we just got the same version from the same source - request playback again?
// at any rate, not an error, moving on
if (existingMetadata.Value <string>(Constants.RavenReplicationSource) == metadata.Value <string>(Constants.RavenReplicationSource) &&
existingMetadata.Value <long>(Constants.RavenReplicationVersion) == metadata.Value <long>(Constants.RavenReplicationVersion))
{
return;
}
var existingDocumentIsInConflict = existingMetadata[Constants.RavenReplicationConflict] != null;
var existingDocumentIsDeleted = existingMetadata[Constants.RavenDeleteMarker] != null &&
existingMetadata[Constants.RavenDeleteMarker].Value <bool>();
if (existingDocumentIsInConflict == false && // if the current document is not in conflict, we can continue without having to keep conflict semantics
existingDocumentIsDeleted == false &&
(Historian.IsDirectChildOfCurrent(metadata, existingMetadata))) // this update is direct child of the existing doc, so we are fine with overwriting this
{
log.Debug("Existing item {0} replicated successfully from {1}", id, Src);
AddWithoutConflict(id, existingEtag, metadata, incoming);
return;
}
if (existingDocumentIsInConflict == false && // if the current document is not in conflict, we can continue without having to keep conflict semantics
existingDocumentIsDeleted &&
(Historian.IsDirectChildOfCurrent(metadata, existingMetadata))) // this update is direct child of the existing doc, so we are fine with overwriting this
{
log.Debug("Existing item {0} replicated successfully from {1}", id, Src);
AddWithoutConflict(id, null, metadata, incoming);
return;
}
if (TryResolveConflict(id, metadata, incoming, existingItem))
{
AddWithoutConflict(id, existingEtag, metadata, incoming);
return;
}
Database.TransactionalStorage.ExecuteImmediatelyOrRegisterForSyncronization(() =>
Database.RaiseNotifications(new DocumentChangeNotification
{
Id = id,
Type = ReplicationConflict
}));
var newDocumentConflictId = SaveConflictedItem(id, metadata, incoming, existingEtag);
if (existingDocumentIsInConflict) // the existing document is in conflict
{
log.Debug("Conflicted item {0} has a new version from {1}, adding to conflicted documents", id, Src);
AppendToCurrentItemConflicts(id, newDocumentConflictId, existingMetadata, existingItem);
return;
}
log.Debug("Existing item {0} is in conflict with replicated version from {1}, marking item as conflicted", id, Src);
// we have a new conflict
// move the existing doc to a conflict and create a conflict document
var existingDocumentConflictId = id + "/conflicts/" + HashReplicationIdentifier(existingEtag);
CreateConflict(id, newDocumentConflictId, existingDocumentConflictId, existingItem, existingMetadata);
}
private void ReplicateDelete(string id, RavenJObject metadata, TExternal incoming)
{
TInternal existingItem;
Guid existingEtag;
var existingMetadata = TryGetExisting(id, out existingItem, out existingEtag);
if (existingMetadata == null)
{
log.Debug("Replicating deleted item {0} from {1} that does not exist, ignoring", id, Src);
return;
}
if (existingMetadata.Value <bool>(Constants.RavenReplicationConflict)) // locally conflicted
{
log.Debug("Replicating deleted item {0} from {1} that is already conflicted, adding to conflicts.", id, Src);
var savedConflictedItemId = SaveConflictedItem(id, metadata, incoming, existingEtag);
AppendToCurrentItemConflicts(id, savedConflictedItemId, existingMetadata, existingItem);
return;
}
if (existingMetadata.Value <bool>(Constants.RavenDeleteMarker)) //deleted locally as well
{
log.Debug("Replicating deleted item {0} from {1} that was deleted locally. Merging histories", id, Src);
var existingHistory = existingMetadata.Value <RavenJArray>(Constants.RavenReplicationHistory) ?? new RavenJArray();
var newHistory = metadata.Value <RavenJArray>(Constants.RavenReplicationHistory) ?? new RavenJArray();
foreach (var item in newHistory)
{
existingHistory.Add(item);
}
if (metadata.ContainsKey(Constants.RavenReplicationVersion) &&
metadata.ContainsKey(Constants.RavenReplicationSource))
{
existingHistory.Add(new RavenJObject
{
{ Constants.RavenReplicationVersion, metadata[Constants.RavenReplicationVersion] },
{ Constants.RavenReplicationSource, metadata[Constants.RavenReplicationSource] }
});
}
while (existingHistory.Length > Constants.ChangeHistoryLength)
{
existingHistory.RemoveAt(0);
}
MarkAsDeleted(id, metadata);
return;
}
if (Historian.IsDirectChildOfCurrent(metadata, existingMetadata)) // not modified
{
log.Debug("Delete of existing item {0} was replicated successfully from {1}", id, Src);
DeleteItem(id, existingEtag);
MarkAsDeleted(id, metadata);
return;
}
Database.TransactionalStorage.ExecuteImmediatelyOrRegisterForSyncronization(() =>
Database.RaiseNotifications(new DocumentChangeNotification
{
Id = id,
Type = DocumentChangeTypes.ReplicationConflict
}));
var newConflictId = SaveConflictedItem(id, metadata, incoming, existingEtag);
log.Debug("Existing item {0} is in conflict with replicated delete from {1}, marking item as conflicted", id, Src);
// we have a new conflict move the existing doc to a conflict and create a conflict document
var existingDocumentConflictId = id + "/conflicts/" + HashReplicationIdentifier(existingEtag);
CreateConflict(id, newConflictId, existingDocumentConflictId, existingItem, existingMetadata);
}
public SynchronizationWorkItem DetermineWork(string file, RavenJObject localMetadata, RavenJObject destinationMetadata, string localServerUrl, out NoSyncReason reason)
{
reason = NoSyncReason.Unknown;
if (localMetadata == null)
{
reason = NoSyncReason.SourceFileNotExist;
return(null);
}
if (destinationMetadata != null && destinationMetadata[SynchronizationConstants.RavenSynchronizationConflict] != null && destinationMetadata[SynchronizationConstants.RavenSynchronizationConflictResolution] == null)
{
reason = NoSyncReason.DestinationFileConflicted;
return(null);
}
if (localMetadata[SynchronizationConstants.RavenSynchronizationConflict] != null)
{
reason = NoSyncReason.SourceFileConflicted;
return(null);
}
if (localMetadata[SynchronizationConstants.RavenDeleteMarker] != null)
{
if (localMetadata.ContainsKey(SynchronizationConstants.RavenRenameFile))
{
var rename = localMetadata.Value <string>(SynchronizationConstants.RavenRenameFile);
if (destinationMetadata != null)
{
return(new RenameWorkItem(file, rename, localServerUrl, storage));
}
return(new ContentUpdateWorkItem(rename, localServerUrl, storage, sigGenerator));
// we have a rename tombstone but file does not exists on destination
}
return(new DeleteWorkItem(file, localServerUrl, storage));
}
if (destinationMetadata != null && Historian.IsDirectChildOfCurrent(localMetadata, destinationMetadata))
{
reason = NoSyncReason.ContainedInDestinationHistory;
return(null);
}
// file exists on dest and has the same content
if (destinationMetadata != null && localMetadata.Value <string>("Content-MD5") == destinationMetadata.Value <string>("Content-MD5"))
{
// check metadata to detect if any synchronization is needed
if (localMetadata.Keys.Except(new[] { "ETag", "Last-Modified" })
.Any(key => !destinationMetadata.ContainsKey(key) || localMetadata[key] != destinationMetadata[key]))
{
return(new MetadataUpdateWorkItem(file, localServerUrl, destinationMetadata, storage));
}
reason = NoSyncReason.SameContentAndMetadata;
return(null); // the same content and metadata - no need to synchronize
}
return(new ContentUpdateWorkItem(file, localServerUrl, storage, sigGenerator));
}
public void Replicate(string id, RavenJObject metadata, TExternal incoming)
{
if (metadata.Value <bool>(Constants.RavenDeleteMarker))
{
ReplicateDelete(id, metadata, incoming);
return;
}
TInternal existingItem;
Etag existingEtag;
bool deleted;
RavenJObject existingMetadata;
try
{
existingMetadata = TryGetExisting(id, out existingItem, out existingEtag, out deleted);
}
catch (Exception e)
{
log.ErrorException(string.Format("Replication - fetching existing item failed. (key = {0})", id), e);
throw new InvalidOperationException("Replication - fetching existing item failed. (key = " + id + ")", e);
}
if (existingMetadata == null)
{
AddWithoutConflict(id, null, metadata, incoming);
if (log.IsDebugEnabled)
{
log.Debug("New item {0} replicated successfully from {1}", id, Src);
}
return;
}
// we just got the same version from the same source - request playback again?
// at any rate, not an error, moving on
if (existingMetadata.Value <string>(Constants.RavenReplicationSource) ==
metadata.Value <string>(Constants.RavenReplicationSource)
&&
existingMetadata.Value <long>(Constants.RavenReplicationVersion) ==
metadata.Value <long>(Constants.RavenReplicationVersion))
{
return;
}
var existingDocumentIsInConflict = existingMetadata[Constants.RavenReplicationConflict] != null;
if (existingDocumentIsInConflict == false &&
// if the current document is not in conflict, we can continue without having to keep conflict semantics
(Historian.IsDirectChildOfCurrent(metadata, existingMetadata)))
// this update is direct child of the existing doc, so we are fine with overwriting this
{
var etag = deleted == false ? existingEtag : null;
AddWithoutConflict(id, etag, metadata, incoming);
if (log.IsDebugEnabled)
{
log.Debug("Existing item {0} replicated successfully from {1}", id, Src);
}
return;
}
// this is the case where the incoming metadata is an older version of the metadata we have.
// this can happen when multiple sources send data with diffrent latencies
if (existingDocumentIsInConflict == false && Historian.IsDirectChildOfCurrent(existingMetadata, metadata))
{
return;
}
RavenJObject resolvedMetadataToSave;
TExternal resolvedItemToSave;
if (TryResolveConflict(id, metadata, incoming, existingItem, out resolvedMetadataToSave, out resolvedItemToSave))
{
if (resolvedMetadataToSave.ContainsKey("Raven-Remove-Document-Marker") &&
resolvedMetadataToSave.Value <bool>("Raven-Remove-Document-Marker"))
{
if (metadata.ContainsKey(Constants.RavenEntityName))
{
resolvedMetadataToSave[Constants.RavenEntityName] = metadata[Constants.RavenEntityName];
}
DeleteItem(id, null);
MarkAsDeleted(id, resolvedMetadataToSave);
}
else
{
var etag = deleted == false ? existingEtag : null;
var resolvedItemJObject = resolvedItemToSave as RavenJObject;
if (resolvedItemJObject != null)
{
ExecuteRemoveConflictOnPutTrigger(id, metadata, resolvedItemJObject);
}
AddWithoutConflict(id, etag, resolvedMetadataToSave, resolvedItemToSave);
}
return;
}
//this is expensive but worth trying if we can avoid conflicts
if (TryResolveConflictByCheckingIfIdentical(id, metadata, incoming, existingItem, out resolvedMetadataToSave))
{
//The metadata here is merged (changed), it needs to be pushed.
AddWithoutConflict(id, null, resolvedMetadataToSave, incoming);
return;
}
CreatedConflict createdConflict;
var newDocumentConflictId = SaveConflictedItem(id, metadata, incoming, existingEtag);
if (existingDocumentIsInConflict) // the existing document is in conflict
{
if (log.IsDebugEnabled)
{
log.Debug("Conflicted item {0} has a new version from {1}, adding to conflicted documents", id, Src);
}
createdConflict = AppendToCurrentItemConflicts(id, newDocumentConflictId, existingMetadata, existingItem);
}
else
{
if (log.IsDebugEnabled)
{
log.Debug("Existing item {0} is in conflict with replicated version from {1}, marking item as conflicted", id, Src);
}
// we have a new conflict
// move the existing doc to a conflict and create a conflict document
var existingDocumentConflictId = id + "/conflicts/" + GetReplicationIdentifierForCurrentDatabase();
createdConflict = CreateConflict(id, newDocumentConflictId, existingDocumentConflictId, existingItem,
existingMetadata);
}
Database.TransactionalStorage.ExecuteImmediatelyOrRegisterForSynchronization(() =>
Database.Notifications.RaiseNotifications(new ReplicationConflictNotification()
{
Id = id,
Etag = createdConflict.Etag,
ItemType = ReplicationConflict,
OperationType = ReplicationOperationTypes.Put,
Conflicts = createdConflict.ConflictedIds
}));
}
private void ReplicateDelete(string id, RavenJObject newMetadata, TExternal incoming)
{
TInternal existingItem;
Etag existingEtag;
bool deleted;
var existingMetadata = TryGetExisting(id, out existingItem, out existingEtag, out deleted);
if (existingMetadata == null)
{
if (log.IsDebugEnabled)
{
log.Debug("Replicating deleted item {0} from {1} that does not exist, ignoring.", id, Src);
}
return;
}
if (existingMetadata.ContainsKey(Constants.RavenEntityName))
{
newMetadata[Constants.RavenEntityName] = existingMetadata[Constants.RavenEntityName];
}
RavenJObject currentReplicationEntry = null;
if (newMetadata.ContainsKey(Constants.RavenReplicationVersion) &&
newMetadata.ContainsKey(Constants.RavenReplicationSource))
{
currentReplicationEntry = new RavenJObject
{
{ Constants.RavenReplicationVersion, newMetadata[Constants.RavenReplicationVersion] },
{ Constants.RavenReplicationSource, newMetadata[Constants.RavenReplicationSource] }
};
}
var existingHistory = ReplicationData.GetOrCreateHistory(existingMetadata);
if (currentReplicationEntry != null &&
existingHistory.Any(x => RavenJTokenEqualityComparer.Default.Equals(
((RavenJObject)x)[Constants.RavenReplicationSource], currentReplicationEntry[Constants.RavenReplicationSource]) &&
((RavenJObject)x)[Constants.RavenReplicationVersion].Value <long>() >= currentReplicationEntry[Constants.RavenReplicationVersion].Value <long>()))
{
if (log.IsDebugEnabled)
{
log.Debug("Replicated delete for {0} already exist in item history, ignoring", id);
}
return;
}
if (existingMetadata.Value <bool>(Constants.RavenDeleteMarker)) //deleted locally as well
{
if (log.IsDebugEnabled)
{
log.Debug("Replicating deleted item {0} from {1} that was deleted locally. Merging histories.", id, Src);
}
var newHistory = ReplicationData.GetOrCreateHistory(newMetadata);
if (currentReplicationEntry != null)
{
newHistory.Add(currentReplicationEntry);
}
//Merge histories
ReplicationData.SetHistory(newMetadata, Historian.MergeReplicationHistories(newHistory, existingHistory, id));
newMetadata[Constants.RavenReplicationMergedHistory] = true;
MarkAsDeleted(id, newMetadata);
return;
}
if (Historian.IsDirectChildOfCurrent(newMetadata, existingMetadata)) // not modified
{
if (log.IsDebugEnabled)
{
log.Debug("Delete of existing item {0} was replicated successfully from {1}", id, Src);
}
DeleteItem(id, existingEtag);
MarkAsDeleted(id, newMetadata);
return;
}
CreatedConflict createdConflict;
if (existingMetadata.Value <bool>(Constants.RavenReplicationConflict)) // locally conflicted
{
if (log.IsDebugEnabled)
{
log.Debug("Replicating deleted item {0} from {1} that is already conflicted, adding to conflicts.", id, Src);
}
var savedConflictedItemId = SaveConflictedItem(id, newMetadata, incoming, existingEtag);
createdConflict = AppendToCurrentItemConflicts(id, savedConflictedItemId, existingMetadata, existingItem);
}
else
{
RavenJObject resolvedMetadataToSave;
TExternal resolvedItemToSave;
if (TryResolveConflict(id, newMetadata, incoming, existingItem, out resolvedMetadataToSave, out resolvedItemToSave))
{
if (resolvedMetadataToSave.ContainsKey("Raven-Delete-Marker") &&
resolvedMetadataToSave.Value <bool>("Raven-Delete-Marker"))
{
// the deleted document "wins"
if (newMetadata.ContainsKey(Constants.RavenEntityName))
{
resolvedMetadataToSave[Constants.RavenEntityName] = newMetadata[Constants.RavenEntityName];
}
DeleteItem(id, null);
MarkAsDeleted(id, resolvedMetadataToSave);
}
else
{
var etag = deleted == false ? existingEtag : null;
AddWithoutConflict(id, etag, resolvedMetadataToSave, resolvedItemToSave);
}
return;
}
var newConflictId = SaveConflictedItem(id, newMetadata, incoming, existingEtag);
if (log.IsDebugEnabled)
{
log.Debug("Existing item {0} is in conflict with replicated delete from {1}, marking item as conflicted", id, Src);
}
// we have a new conflict move the existing doc to a conflict and create a conflict document
var existingDocumentConflictId = id + "/conflicts/" + GetReplicationIdentifierForCurrentDatabase();
createdConflict = CreateConflict(id, newConflictId, existingDocumentConflictId, existingItem, existingMetadata);
}
Database.TransactionalStorage.ExecuteImmediatelyOrRegisterForSynchronization(() =>
Database.Notifications.RaiseNotifications(new ReplicationConflictNotification()
{
Id = id,
Etag = createdConflict.Etag,
Conflicts = createdConflict.ConflictedIds,
ItemType = ReplicationConflictTypes.DocumentReplicationConflict,
OperationType = ReplicationOperationTypes.Delete
}));
}
private void ReplicateDelete(string id, RavenJObject metadata, TExternal incoming)
{
TInternal existingItem;
Etag existingEtag;
bool deleted;
var existingMetadata = TryGetExisting(id, out existingItem, out existingEtag, out deleted);
if (existingMetadata == null)
{
log.Debug("Replicating deleted item {0} from {1} that does not exist, ignoring", id, Src);
return;
}
if (existingMetadata.Value <bool>(Constants.RavenDeleteMarker)) //deleted locally as well
{
log.Debug("Replicating deleted item {0} from {1} that was deleted locally. Merging histories", id, Src);
var existingHistory = new RavenJArray(ReplicationData.GetHistory(existingMetadata));
var newHistory = new RavenJArray(ReplicationData.GetHistory(metadata));
foreach (var item in newHistory)
{
existingHistory.Add(item);
}
if (metadata.ContainsKey(Constants.RavenReplicationVersion) &&
metadata.ContainsKey(Constants.RavenReplicationSource))
{
existingHistory.Add(new RavenJObject
{
{ Constants.RavenReplicationVersion, metadata[Constants.RavenReplicationVersion] },
{ Constants.RavenReplicationSource, metadata[Constants.RavenReplicationSource] }
});
}
while (existingHistory.Length > Constants.ChangeHistoryLength)
{
existingHistory.RemoveAt(0);
}
MarkAsDeleted(id, metadata);
return;
}
if (Historian.IsDirectChildOfCurrent(metadata, existingMetadata)) // not modified
{
log.Debug("Delete of existing item {0} was replicated successfully from {1}", id, Src);
DeleteItem(id, existingEtag);
MarkAsDeleted(id, metadata);
return;
}
CreatedConflict createdConflict;
if (existingMetadata.Value <bool>(Constants.RavenReplicationConflict)) // locally conflicted
{
log.Debug("Replicating deleted item {0} from {1} that is already conflicted, adding to conflicts.", id, Src);
var savedConflictedItemId = SaveConflictedItem(id, metadata, incoming, existingEtag);
createdConflict = AppendToCurrentItemConflicts(id, savedConflictedItemId, existingMetadata, existingItem);
}
else
{
RavenJObject resolvedMetadataToSave;
TExternal resolvedItemToSave;
if (TryResolveConflict(id, metadata, incoming, existingItem, out resolvedMetadataToSave, out resolvedItemToSave))
{
AddWithoutConflict(id, existingEtag, resolvedMetadataToSave, resolvedItemToSave);
return;
}
var newConflictId = SaveConflictedItem(id, metadata, incoming, existingEtag);
log.Debug("Existing item {0} is in conflict with replicated delete from {1}, marking item as conflicted", id, Src);
// we have a new conflict move the existing doc to a conflict and create a conflict document
var existingDocumentConflictId = id + "/conflicts/" + GetReplicationIdentifierForCurrentDatabase();
createdConflict = CreateConflict(id, newConflictId, existingDocumentConflictId, existingItem, existingMetadata);
}
Database.TransactionalStorage.ExecuteImmediatelyOrRegisterForSynchronization(() =>
Database.Notifications.RaiseNotifications(new ReplicationConflictNotification()
{
Id = id,
Etag = createdConflict.Etag,
Conflicts = createdConflict.ConflictedIds,
ItemType = ReplicationConflictTypes.DocumentReplicationConflict,
OperationType = ReplicationOperationTypes.Delete
}));
}
public void Replicate(string id, RavenJObject metadata, TExternal incoming)
{
if (metadata.Value <bool>(Constants.RavenDeleteMarker))
{
ReplicateDelete(id, metadata, incoming);
return;
}
TInternal existingItem;
Etag existingEtag;
bool deleted;
RavenJObject existingMetadata;
try
{
existingMetadata = TryGetExisting(id, out existingItem, out existingEtag, out deleted);
}
catch (Exception e)
{
log.Error("Replication - fetching existing item failed. (key = {0})", id);
throw new InvalidOperationException("Replication - fetching existing item failed. (key = " + id + ")", e);
}
if (existingMetadata == null)
{
log.Debug("New item {0} replicated successfully from {1}", id, Src);
AddWithoutConflict(id, null, metadata, incoming);
return;
}
// we just got the same version from the same source - request playback again?
// at any rate, not an error, moving on
if (existingMetadata.Value <string>(Constants.RavenReplicationSource) ==
metadata.Value <string>(Constants.RavenReplicationSource)
&&
existingMetadata.Value <long>(Constants.RavenReplicationVersion) ==
metadata.Value <long>(Constants.RavenReplicationVersion))
{
return;
}
var existingDocumentIsInConflict = existingMetadata[Constants.RavenReplicationConflict] != null;
if (existingDocumentIsInConflict == false &&
// if the current document is not in conflict, we can continue without having to keep conflict semantics
(Historian.IsDirectChildOfCurrent(metadata, existingMetadata)))
// this update is direct child of the existing doc, so we are fine with overwriting this
{
log.Debug("Existing item {0} replicated successfully from {1}", id, Src);
var etag = deleted == false ? existingEtag : null;
AddWithoutConflict(id, etag, metadata, incoming);
return;
}
RavenJObject resolvedMetadataToSave;
TExternal resolvedItemToSave;
if (TryResolveConflict(id, metadata, incoming, existingItem, out resolvedMetadataToSave, out resolvedItemToSave))
{
if (metadata.ContainsKey("Raven-Remove-Document-Marker") &&
metadata.Value <bool>("Raven-Remove-Document-Marker"))
{
DeleteItem(id, null);
MarkAsDeleted(id, metadata);
}
else
{
var etag = deleted == false ? existingEtag : null;
AddWithoutConflict(id, etag, resolvedMetadataToSave, resolvedItemToSave);
}
return;
}
CreatedConflict createdConflict;
var newDocumentConflictId = SaveConflictedItem(id, metadata, incoming, existingEtag);
if (existingDocumentIsInConflict) // the existing document is in conflict
{
log.Debug("Conflicted item {0} has a new version from {1}, adding to conflicted documents", id, Src);
createdConflict = AppendToCurrentItemConflicts(id, newDocumentConflictId, existingMetadata, existingItem);
}
else
{
log.Debug("Existing item {0} is in conflict with replicated version from {1}, marking item as conflicted", id, Src);
// we have a new conflict
// move the existing doc to a conflict and create a conflict document
var existingDocumentConflictId = id + "/conflicts/" + HashReplicationIdentifier(existingEtag);
createdConflict = CreateConflict(id, newDocumentConflictId, existingDocumentConflictId, existingItem,
existingMetadata);
}
Database.TransactionalStorage.ExecuteImmediatelyOrRegisterForSynchronization(() =>
Database.Notifications.RaiseNotifications(new ReplicationConflictNotification()
{
Id = id,
Etag = createdConflict.Etag,
ItemType = ReplicationConflict,
OperationType = ReplicationOperationTypes.Put,
Conflicts = createdConflict.ConflictedIds
}));
}
