public async Task <TResult> FindByIdAsync <TEntity, TResult>(
string rowKey, string partitionKey,
Func <TEntity, TResult> onSuccess,
Func <TResult> onNotFound,
Func <ExtendedErrorInformationCodes, string, TResult> onFailure =
default(Func <ExtendedErrorInformationCodes, string, TResult>),
AzureStorageDriver.RetryDelegate onTimeout =
default(AzureStorageDriver.RetryDelegate))
{
var tableName = typeof(TEntity).GetAttributesInterface <IProvideTable>()
.First(
(attr, next) => typeof(TEntity).Name, //attr.TableName,
() => typeof(TEntity).Name);
var propertyNames = typeof(TEntity)
.GetProperties()
.Where(propInfo => propInfo.ContainsAttributeInterface <IPersistInAzureStorageTables>())
.Select(propInfo => propInfo.GetAttributesInterface <IPersistInAzureStorageTables>().First().GetTablePropertyName(propInfo))
.Join(",");
using (var http = new HttpClient(
new SharedKeySignatureStoreTablesMessageHandler(this.accountName, this.accountKey))
{
Timeout = new TimeSpan(0, 5, 0)
})
{
var url = $"https://{accountName}.table.core.windows.net/{tableName}(PartitionKey='{partitionKey}',RowKey='{rowKey}')?$select=propertyNames";
var response = await http.GetAsync(url);
return(onSuccess(default(TEntity)));
}
}
public async Task <TResult> FindAllAsync <TEntity, TResult>(
string filter,
Func <TEntity[], TResult> onSuccess,
Func <ExtendedErrorInformationCodes, string, TResult> onFailure =
default(Func <ExtendedErrorInformationCodes, string, TResult>),
AzureStorageDriver.RetryDelegate onTimeout =
default(AzureStorageDriver.RetryDelegate))
{
var tableName = typeof(TEntity).GetAttributesInterface <IProvideTable>()
.First(
(attr, next) => typeof(TEntity).Name, //attr.TableName,
() => typeof(TEntity).Name);
var propertyNames = typeof(TEntity)
.GetProperties()
.Where(propInfo => propInfo.ContainsAttributeInterface <IPersistInAzureStorageTables>())
.Select(propInfo => propInfo.GetAttributesInterface <IPersistInAzureStorageTables>().First().GetTablePropertyName(propInfo))
.Join(",");
using (var http = new HttpClient(
new SharedKeySignatureStoreTablesMessageHandler(this.accountName, this.accountKey))
{
Timeout = new TimeSpan(0, 5, 0)
})
{
var filterAndParameter = filter.IsNullOrWhiteSpace(
() => string.Empty,
queryExpression => $"$filter={queryExpression}&");
var url = $"https://{accountName}.table.core.windows.net/{tableName}()?{filterAndParameter}$select=propertyNames";
// https://myaccount.table.core.windows.net/mytable()?$filter=<query-expression>&$select=<comma-separated-property-names>
var response = await http.GetAsync(url);
return(onSuccess(default(TEntity).AsArray()));
}
}
public static Task <TResult> ResolveCreate <TResult>(this StorageException exception,
Microsoft.WindowsAzure.Storage.Table.CloudTable table,
Func <TResult> retry,
Func <ExtendedErrorInformationCodes, string, TResult> onFailure = default,
Func <TResult> onAlreadyExists = default,
AzureStorageDriver.RetryDelegate onTimeout = default)
{
return(exception.ParseStorageException(
onEntityAlreadyExists: (msg) => onAlreadyExists().AsTask(),
onNotFound: async(msg) => // IsProblemTableDoesNotExist
{
try
{
await table.CreateIfNotExistsAsync();
return retry();
}
catch (StorageException createEx)
{
// Catch bug with azure storage table client library where
// if two resources attempt to create the table at the same
// time one gets a precondtion failed error.
System.Threading.Thread.Sleep(1000);
return retry();
}
catch (Exception) { throw; };
},
onTimeout: async(msg) => // IsProblemTimeout
{
if (onTimeout.IsDefaultOrNull())
{
onTimeout = AzureStorageDriver.GetRetryDelegate();
}
bool shouldRetry = false;
await onTimeout(exception.RequestInformation.HttpStatusCode, exception,
() =>
{
shouldRetry = true;
return 1.AsTask();
});
if (shouldRetry)
{
return retry();
}
throw exception;
},
onDefaultCallback:
(error, msg) => onFailure(error, msg).AsTask()));
}
