public static ReplicatedTableQuorumWriteResult TryUploadBlobs <T>(List <CloudBlockBlob> blobs, T configuration)
where T : class
{
string content = configuration.ToString();
// Update blobs ...
int numberOfBlobs = blobs.Count;
ReplicatedTableWriteBlobResult[] writeResultArray = new ReplicatedTableWriteBlobResult[numberOfBlobs];
Parallel.For(0, numberOfBlobs, index =>
{
writeResultArray[index] = TryWriteBlob(blobs[index], content, "*");
});
int successRate = writeResultArray.Count(e => e.Success == true);
if (successRate == numberOfBlobs)
{
return(new ReplicatedTableQuorumWriteResult(ReplicatedTableQuorumWriteCode.Success, writeResultArray.ToList()));
}
return(new ReplicatedTableQuorumWriteResult(ReplicatedTableQuorumWriteCode.QuorumWriteFailure, writeResultArray.ToList()));
}
public static ReplicatedTableQuorumWriteResult TryWriteBlobQuorum <T>(List <CloudBlockBlob> blobs, T configuration, Func <string, T> ParseBlobFunc, Func <T, T, bool> ConfigIdComparer, Func <T, T> GenerateConfigId)
where T : ReplicatedTableConfigurationBase, new()
{
// Fetch all blobs ...
List <T> valuesArray;
List <string> eTagsArray;
List <ReplicatedTableReadBlobResult> resultArray = TryReadAllBlobs(blobs, out valuesArray, out eTagsArray, ParseBlobFunc);
// Find majority ...
int quorumIndex;
ReplicatedTableQuorumReadResult majority = FindMajority(resultArray.AsReadOnly(), valuesArray.AsReadOnly(), out quorumIndex);
string readDetails = majority.ToString();
switch (majority.Code)
{
case ReplicatedTableQuorumReadCode.NotFound:
// Create blobs ...
break;
case ReplicatedTableQuorumReadCode.UpdateInProgress:
return(new ReplicatedTableQuorumWriteResult(ReplicatedTableQuorumWriteCode.ConflictDueToUpdateInProgress, readDetails));
case ReplicatedTableQuorumReadCode.Exception:
return(new ReplicatedTableQuorumWriteResult(ReplicatedTableQuorumWriteCode.ReadExceptions, readDetails));
case ReplicatedTableQuorumReadCode.NullOrLowSuccessRate:
return(new ReplicatedTableQuorumWriteResult(ReplicatedTableQuorumWriteCode.ReadNoQuorum, readDetails));
case ReplicatedTableQuorumReadCode.Success:
// Blob has changed since ...
if (ConfigIdComparer(valuesArray[quorumIndex], configuration) == false)
{
return(new ReplicatedTableQuorumWriteResult(ReplicatedTableQuorumWriteCode.ConflictDueToBlobChange, readDetails));
}
// Update blobs ...
break;
case ReplicatedTableQuorumReadCode.BlobsNotInSyncOrTransitioning:
return(new ReplicatedTableQuorumWriteResult(ReplicatedTableQuorumWriteCode.BlobsNotInSyncOrTransitioning, readDetails));
case ReplicatedTableQuorumReadCode.NullObject:
default:
{
var msg = string.Format("Unexpected value majority=\'{0}\' ", majority.Code);
throw new Exception(msg);
}
}
// Generate a new Id for the copy of the input configuration
T newConfiguration = GenerateConfigId(configuration);
string content = newConfiguration.ToString();
// Update blobs ...
int numberOfBlobs = blobs.Count;
ReplicatedTableWriteBlobResult[] writeResultArray = new ReplicatedTableWriteBlobResult[numberOfBlobs];
Parallel.For(0, numberOfBlobs, index =>
{
T currentValue = valuesArray[index];
string currentETag = eTagsArray[index];
if (currentValue == null)
{
currentETag = null;
}
else if (!ConfigIdComparer(currentValue, configuration))
{
currentETag = "*";
}
writeResultArray[index] = TryWriteBlob(blobs[index], content, currentETag);
});
int successRate = writeResultArray.Count(e => e.Success == true);
int quorum = (numberOfBlobs / 2) + 1;
if (successRate >= quorum)
{
// Return new config Id to the caller for record
string newConfId = newConfiguration.GetConfigId().ToString();
return(new ReplicatedTableQuorumWriteResult(ReplicatedTableQuorumWriteCode.Success, newConfId, writeResultArray.ToList()));
}
return(new ReplicatedTableQuorumWriteResult(ReplicatedTableQuorumWriteCode.QuorumWriteFailure, writeResultArray.ToList()));
}
