public async Task QueryTablesAsync()
{
string storageUri = StorageUri;
string accountName = StorageAccountName;
string storageAccountKey = PrimaryStorageAccountKey;
string tableName = "OfficeSupplies3p2" + _random.Next();
var serviceClient = new TableServiceClient(
new Uri(storageUri),
new TableSharedKeyCredential(accountName, storageAccountKey));
await serviceClient.CreateTableAsync(tableName);
#region Snippet:TablesSample3QueryTablesAsync
// Use the <see cref="TableServiceClient"> to query the service. Passing in OData filter strings is optional.
AsyncPageable <TableItem> queryTableResults = serviceClient.QueryAsync(filter: $"TableName eq '{tableName}'");
Console.WriteLine("The following are the names of the tables in the query result:");
// Iterate the <see cref="Pageable"> in order to access individual queried tables.
await foreach (TableItem table in queryTableResults)
{
Console.WriteLine(table.Name);
}
#endregion
await serviceClient.DeleteTableAsync(tableName);
}
public async Task <List <string> > ListTablesAsync()
{
var result = new List <string>();
var tableItems = tableServiceClient.QueryAsync();
await foreach (var tableItem in tableItems)
{
result.Add(tableItem.Name);
}
return(result);
}
public static async Task <List <string> > ListTablesAsync(string account, string key)
{
TableServiceClient client = new TableServiceClient(Client.GetConnectionString(account, key));
List <string> results = new List <string>();
await foreach (var table in client.QueryAsync())
{
results.Add(table.Name);
}
return(results);
}
/// <summary>
/// Inspects the Service Fabric diagnostic tables and removes old items when found.
/// </summary>
/// <returns></returns>
internal async Task CleanupDiagnosticTablesAsync()
{
if ((string.IsNullOrWhiteSpace(this._endpoint)) || (string.IsNullOrWhiteSpace(this._sasToken)))
{
ServiceEventSource.Current.Error("Storage account information not set.");
return;
}
try
{
// Create the storage credentials and connect to the storage account.
// The SAS token must be a Table service SAS URL with permissions to read, delete and list table entries. HTTPS must be used.
AzureSasCredential sc = new AzureSasCredential(this._sasToken);
TableServiceClient client = new TableServiceClient(new Uri(this._endpoint), sc);
// Inspect each table for items to be removed.
foreach (string tableName in this._tablesToInspect)
{
await foreach (var table in client.QueryAsync(t => t.Name == tableName))
{
var tableClient = client.GetTableClient(table.Name);
await this.EnumerateTableItemsAsync(table, tableClient);
}
}
this._healthState = HealthState.Ok;
}
catch (RequestFailedException ex)
{
this._healthState = HealthState.Error;
ServiceEventSource.Current.Exception(ex.Message, ex.GetType().Name, ex.StackTrace);
}
catch (Exception ex)
{
ServiceEventSource.Current.Exception(ex.Message, ex.GetType().Name, ex.StackTrace);
}
}
private async Task DeleteExpiredTables(DateTimeOffset endTime)
{
// Note: in practice you would likely debounce / limit the number of times this method gets called
// For brevity we just do it on every read operation.
var minBucket = GetBucketNameForTimeSpan(endTime);
_logger.LogInformation("Deleting tables before: [{bucket}]", minBucket);
await foreach (var table in _tableServiceClient.QueryAsync())
{
// Skip tables that aren't a part of this, they've done nothing wrong.
if (!table.Name.StartsWith(_tablePrefix))
{
continue;
}
var bucketId = GetBucketId(table.Name);
if (bucketId < minBucket)
{
_logger.LogInformation("Deleting expired table: [{tableName}]", table.Name);
await _tableServiceClient.DeleteTableAsync(table.Name);
}
}
}
public IAsyncEnumerable <TableItem> GetTables() => serviceClient.QueryAsync();
/// <summary>
/// Does the table exist
/// </summary>
/// <returns></returns>
public async Task <bool> TableExistsAsync()
{
return((await _cloudTableService.QueryAsync(e => e.Name == _tableName).ToListAsync()).Any());
}
