/// <summary>
/// Conditionally update the row for this entry, but only if the eTag matches with the current record in data store
/// </summary>
/// <param name="siloEntry">Silo Entry to be written</param>
/// <param name="eTag">ETag value for the entry being updated</param>
/// <returns></returns>
internal async Task <bool> UpdateSiloEntryConditionally(SiloInstanceTableEntry siloEntry, string entryEtag, SiloInstanceTableEntry tableVersionEntry, string versionEtag)
{
try
{
await storage.UpdateTwoTableEntriesConditionallyAsync(siloEntry, entryEtag, tableVersionEntry, versionEtag);
return(true);
}
catch (Exception exc)
{
HttpStatusCode httpStatusCode;
string restStatus;
if (!AzureStorageUtils.EvaluateException(exc, out httpStatusCode, out restStatus))
{
throw;
}
if (logger.IsVerbose2)
{
logger.Verbose2("UpdateSiloEntryConditionally failed with httpStatusCode={0}, restStatus={1}", httpStatusCode, restStatus);
}
if (AzureStorageUtils.IsContentionError(httpStatusCode))
{
return(false);
}
throw;
}
}
/// <summary>
/// Insert (create new) row entry
/// </summary>
/// <param name="siloEntry">Silo Entry to be written</param>
/// <param name="tableVersionEntry">Version row to update</param>
/// <param name="tableVersionEtag">Version row eTag</param>
internal async Task <bool> InsertSiloEntryConditionally(SiloInstanceTableEntry siloEntry, SiloInstanceTableEntry tableVersionEntry, string tableVersionEtag)
{
try
{
await storage.InsertTwoTableEntriesConditionallyAsync(siloEntry, tableVersionEntry, tableVersionEtag);
return(true);
}
catch (Exception exc)
{
HttpStatusCode httpStatusCode;
string restStatus;
if (!AzureStorageUtils.EvaluateException(exc, out httpStatusCode, out restStatus))
{
throw;
}
if (logger.IsEnabled(LogLevel.Trace))
{
logger.Trace("InsertSiloEntryConditionally failed with httpStatusCode={0}, restStatus={1}", httpStatusCode, restStatus);
}
if (AzureStorageUtils.IsContentionError(httpStatusCode))
{
return(false);
}
throw;
}
}
/// <summary>
/// Insert (create new) row entry
/// </summary>
/// <param name="siloEntry">Silo Entry to be written</param>
internal async Task <bool> TryCreateTableVersionEntryAsync()
{
try
{
var versionRow = await storage.ReadSingleTableEntryAsync(DeploymentId, SiloInstanceTableEntry.TABLE_VERSION_ROW);
if (versionRow != null && versionRow.Item1 != null)
{
return(false);
}
SiloInstanceTableEntry entry = CreateTableVersionEntry(0);
await storage.CreateTableEntryAsync(entry);
return(true);
}
catch (Exception exc)
{
HttpStatusCode httpStatusCode;
string restStatus;
if (!AzureStorageUtils.EvaluateException(exc, out httpStatusCode, out restStatus))
{
throw;
}
if (logger.IsVerbose2)
{
logger.Verbose2("InsertSiloEntryConditionally failed with httpStatusCode={0}, restStatus={1}", httpStatusCode, restStatus);
}
if (AzureStorageUtils.IsContentionError(httpStatusCode))
{
return(false);
}
throw;
}
}
private void CheckAlertWriteError(string operation, object data1, string data2, Exception exc)
{
HttpStatusCode httpStatusCode;
string restStatus;
if (AzureStorageUtils.EvaluateException(exc, out httpStatusCode, out restStatus) && AzureStorageUtils.IsContentionError(httpStatusCode))
{
// log at Verbose, since failure on conditional is not not an error. Will analyze and warn later, if required.
if (Logger.IsVerbose)
{
Logger.Verbose(ErrorCode.AzureTable_13,
$"Intermediate Azure table write error {operation} to table {TableName} data1 {(data1 ?? "null")} data2 {(data2 ?? "null")}", exc);
}
}
else
{
Logger.Error(ErrorCode.AzureTable_14,
$"Azure table access write error {operation} to table {TableName} entry {data1}", exc);
}
}
private void CheckAlertWriteError(string operation, object data, string tableVersionData, Exception exc)
{
HttpStatusCode httpStatusCode;
string restStatus;
if (AzureStorageUtils.EvaluateException(exc, out httpStatusCode, out restStatus) && AzureStorageUtils.IsContentionError(httpStatusCode))
{
// log at Verbose, since failure on conditional is not not an error. Will analyze and warn later, if required.
if (Logger.IsVerbose)
{
Logger.Verbose(ErrorCode.AzureTable_13,
String.Format("Intermediate Azure table write error {0} to table {1} version {2} entry {3}",
operation, TableName, (tableVersionData ?? "null"), (data ?? "null")), exc);
}
}
else
{
Logger.Error(ErrorCode.AzureTable_14,
string.Format("Azure table access write error {0} to table {1} entry {2}", operation, TableName, data), exc);
}
}