private async Task EnqueueMissingUpdatesAsync(IAsyncFilesSynchronizationCommands destination,
SourceSynchronizationInformation lastEtag,
IList <FileHeader> needSyncingAgain)
{
LogFilesInfo("There were {0} file(s) that needed synchronization because the previous one went wrong: {1}",
needSyncingAgain);
var commands = (IAsyncFilesCommandsImpl)destination.Commands;
var filesToSynchronization = new HashSet <FileHeader>(GetFilesToSynchronization(lastEtag, 100),
new FileHeaderNameEqualityComparer());
LogFilesInfo("There were {0} file(s) that needed synchronization because of greater ETag value: {1}",
filesToSynchronization);
foreach (FileHeader needSyncing in needSyncingAgain)
{
filesToSynchronization.Add(needSyncing);
}
var filteredFilesToSynchronization =
filesToSynchronization.Where(
x => synchronizationStrategy.Filter(x, lastEtag.DestinationServerId, filesToSynchronization)).ToList();
if (filesToSynchronization.Count > 0)
{
LogFilesInfo("There were {0} file(s) that needed synchronization after filtering: {1}", filteredFilesToSynchronization);
}
// Early break. There are no files to synchronize to the selected destination.
if (!filteredFilesToSynchronization.Any())
{
return;
}
var baseUrl = commands.UrlFor();
foreach (var fileHeader in filteredFilesToSynchronization)
{
var file = fileHeader.FullPath;
var localMetadata = GetLocalMetadata(file);
RavenJObject destinationMetadata;
try
{
destinationMetadata = await destination.Commands.GetMetadataForAsync(file);
}
catch (Exception ex)
{
Log.WarnException(
string.Format("Could not retrieve a metadata of a file '{0}' from {1} in order to determine needed synchronization type", file,
baseUrl), ex);
continue;
}
NoSyncReason reason;
var work = synchronizationStrategy.DetermineWork(file, localMetadata, destinationMetadata, FileSystemUrl, out reason);
if (work == null)
{
Log.Debug("File '{0}' were not synchronized to {1}. {2}", file, baseUrl, reason.GetDescription());
if (reason == NoSyncReason.ContainedInDestinationHistory)
{
var etag = localMetadata.Value <Guid>(Constants.MetadataEtagField);
await destination.IncrementLastETagAsync(storage.Id, baseUrl, etag);
RemoveSyncingConfiguration(file, baseUrl);
}
continue;
}
if (synchronizationQueue.EnqueueSynchronization(baseUrl, work))
{
publisher.Publish(new SynchronizationUpdateNotification
{
FileName = work.FileName,
DestinationFileSystemUrl = baseUrl,
SourceServerId = storage.Id,
SourceFileSystemUrl = FileSystemUrl,
Type = work.SynchronizationType,
Action = SynchronizationAction.Enqueue,
Direction = SynchronizationDirection.Outgoing
});
}
}
}
private async Task <bool> EnqueueMissingUpdatesAsync(ISynchronizationServerClient destinationSyncClient,
SourceSynchronizationInformation synchronizationInfo,
IList <FileHeader> needSyncingAgain)
{
LogFilesInfo("There were {0} file(s) that needed synchronization because the previous one went wrong: {1}",
needSyncingAgain);
var filesToSynchronization = new HashSet <FileHeader>(GetFilesToSynchronization(synchronizationInfo.LastSourceFileEtag, NumberOfFilesToCheckForSynchronization),
FileHeaderNameEqualityComparer.Instance);
LogFilesInfo("There were {0} file(s) that needed synchronization because of greater ETag value: {1}",
filesToSynchronization);
foreach (FileHeader needSyncing in needSyncingAgain)
{
filesToSynchronization.Add(needSyncing);
}
var filteredFilesToSynchronization = filesToSynchronization.Where(
x => synchronizationStrategy.Filter(x, synchronizationInfo.DestinationServerId, filesToSynchronization)).ToList();
if (filesToSynchronization.Count > 0)
{
LogFilesInfo("There were {0} file(s) that needed synchronization after filtering: {1}", filteredFilesToSynchronization);
}
if (filteredFilesToSynchronization.Count == 0)
{
var lastFileBeforeFiltering = filesToSynchronization.LastOrDefault();
if (lastFileBeforeFiltering == null)
{
return(true); // there are no more files that need
}
if (lastFileBeforeFiltering.Etag == synchronizationInfo.LastSourceFileEtag)
{
return(true); // already updated etag on destination side
}
await destinationSyncClient.IncrementLastETagAsync(storage.Id, FileSystemUrl, lastFileBeforeFiltering.Etag).ConfigureAwait(false);
return(false); // all docs has been filtered out, update etag on destination side and retry
}
var destinationUrl = destinationSyncClient.BaseUrl;
bool enqueued = true;
foreach (var fileHeader in filteredFilesToSynchronization)
{
context.CancellationToken.ThrowIfCancellationRequested();
var file = fileHeader.FullPath;
var localMetadata = GetLocalMetadata(file);
RavenJObject destinationMetadata;
try
{
destinationMetadata = await destinationSyncClient.GetMetadataForAsync(file).ConfigureAwait(false);
}
catch (Exception ex)
{
Log.WarnException(
string.Format("Could not retrieve a metadata of a file '{0}' from {1} in order to determine needed synchronization type", file,
destinationUrl), ex);
continue;
}
NoSyncReason reason;
var work = synchronizationStrategy.DetermineWork(file, localMetadata, destinationMetadata, FileSystemUrl, out reason);
if (work == null)
{
if (Log.IsDebugEnabled)
{
Log.Debug("File '{0}' were not synchronized to {1}. {2}", file, destinationUrl, reason.GetDescription());
}
if (reason == NoSyncReason.ContainedInDestinationHistory)
{
var etag = localMetadata.Value <Guid>(Constants.MetadataEtagField);
await destinationSyncClient.IncrementLastETagAsync(storage.Id, FileSystemUrl, etag).ConfigureAwait(false);
RemoveSyncingConfiguration(file, destinationUrl);
enqueued = false;
}
continue;
}
if (synchronizationQueue.EnqueueSynchronization(destinationUrl, work))
{
publisher.Publish(new SynchronizationUpdateNotification
{
FileName = work.FileName,
DestinationFileSystemUrl = destinationUrl,
SourceServerId = storage.Id,
SourceFileSystemUrl = FileSystemUrl,
Type = work.SynchronizationType,
Action = SynchronizationAction.Enqueue,
Direction = SynchronizationDirection.Outgoing
});
}
enqueued = true;
}
return(enqueued);
}
private async Task <bool> EnqueueMissingUpdatesAsync(ISynchronizationServerClient destinationSyncClient,
SourceSynchronizationInformation synchronizationInfo,
IList <FileHeader> needSyncingAgain)
{
LogFilesInfo("There were {0} file(s) that needed synchronization because the previous one went wrong: {1}",
needSyncingAgain);
var filesToSynchronization = new HashSet <FileHeader>(GetFilesToSynchronization(synchronizationInfo.LastSourceFileEtag, NumberOfFilesToCheckForSynchronization),
FileHeaderNameEqualityComparer.Instance);
LogFilesInfo("There were {0} file(s) that needed synchronization because of greater ETag value: {1}",
filesToSynchronization);
foreach (FileHeader needSyncing in needSyncingAgain)
{
filesToSynchronization.Add(needSyncing);
}
var filteredFilesToSynchronization = filesToSynchronization.Where(
x => synchronizationStrategy.Filter(x, synchronizationInfo.DestinationServerId, filesToSynchronization)).ToList();
if (filesToSynchronization.Count > 0)
{
LogFilesInfo("There were {0} file(s) that needed synchronization after filtering: {1}", filteredFilesToSynchronization);
}
if (filteredFilesToSynchronization.Count == 0)
{
var lastFileBeforeFiltering = filesToSynchronization.LastOrDefault();
if (lastFileBeforeFiltering == null)
{
return(true); // there are no more files that need
}
if (lastFileBeforeFiltering.Etag == synchronizationInfo.LastSourceFileEtag)
{
return(true); // already updated etag on destination side
}
await destinationSyncClient.IncrementLastETagAsync(storage.Id, FileSystemUrl, lastFileBeforeFiltering.Etag).ConfigureAwait(false);
return(false); // all docs has been filtered out, update etag on destination side and retry
}
var destinationUrl = destinationSyncClient.BaseUrl;
bool enqueued = false;
var maxEtagOfFilteredDoc = Etag.Empty;
foreach (var fileHeader in filteredFilesToSynchronization)
{
context.CancellationToken.ThrowIfCancellationRequested();
var file = fileHeader.FullPath;
var localMetadata = GetLocalMetadata(file);
RavenJObject destinationMetadata;
try
{
destinationMetadata = await destinationSyncClient.GetMetadataForAsync(file).ConfigureAwait(false);
}
catch (Exception ex)
{
Log.WarnException(
string.Format("Could not retrieve a metadata of a file '{0}' from {1} in order to determine needed synchronization type", file,
destinationUrl), ex);
continue;
}
NoSyncReason reason;
var work = synchronizationStrategy.DetermineWork(file, localMetadata, destinationMetadata, FileSystemUrl, out reason);
if (work == null)
{
Log.Debug("File '{0}' was not synchronized to {1}. {2}", file, destinationUrl, reason.GetDescription());
switch (reason)
{
case NoSyncReason.ContainedInDestinationHistory:
case NoSyncReason.DestinationFileConflicted:
case NoSyncReason.NoNeedToDeleteNonExistigFile:
var localEtag = Etag.Parse(localMetadata.Value <string>(Constants.MetadataEtagField));
if (reason == NoSyncReason.ContainedInDestinationHistory)
{
RemoveSyncingConfiguration(file, destinationUrl);
}
else if (reason == NoSyncReason.DestinationFileConflicted)
{
if (needSyncingAgain.Contains(fileHeader, FileHeaderNameEqualityComparer.Instance) == false)
{
CreateSyncingConfiguration(fileHeader.Name, fileHeader.Etag, destinationUrl, SynchronizationType.Unknown);
}
}
else if (reason == NoSyncReason.NoNeedToDeleteNonExistigFile)
{
// after the upgrade to newer build there can be still an existing syncing configuration for it
RemoveSyncingConfiguration(file, destinationUrl);
}
if (EtagUtil.IsGreaterThan(localEtag, maxEtagOfFilteredDoc))
{
maxEtagOfFilteredDoc = localEtag;
}
break;
}
continue;
}
if (synchronizationQueue.EnqueueSynchronization(destinationUrl, work))
{
publisher.Publish(new SynchronizationUpdateNotification
{
FileName = work.FileName,
DestinationFileSystemUrl = destinationUrl,
SourceServerId = storage.Id,
SourceFileSystemUrl = FileSystemUrl,
Type = work.SynchronizationType,
Action = SynchronizationAction.Enqueue,
Direction = SynchronizationDirection.Outgoing
});
}
enqueued = true;
}
if (enqueued == false && EtagUtil.IsGreaterThan(maxEtagOfFilteredDoc, synchronizationInfo.LastSourceFileEtag))
{
await destinationSyncClient.IncrementLastETagAsync(storage.Id, FileSystemUrl, maxEtagOfFilteredDoc).ConfigureAwait(false);
return(false); // we bumped the last synced etag on a destination server, let it know it need to repeat the operation
}
return(true);
}