public static void DeleteEntity(TableServiceEntity entity, string tableName)
{
var tableServiceContext = GetTableServiceContext(tableName);
tableServiceContext.DeleteObject(entity);
tableServiceContext.SaveChangesWithRetries();
}
public static void AddEntity(TableServiceEntity entity, string tableName)
{
var tableServiceContext = GetTableServiceContext(tableName);
// Add the new customer to the people table
tableServiceContext.AddObject(tableName, entity);
// Submit the operation to the table service
tableServiceContext.SaveChangesWithRetries();
}
/// <summary>
/// Creates tables from a DataServiceContext derived class.
/// </summary>
/// <param name="serviceContextType">A DataServiceContext derived class that defines the table schemas.</param>
/// <param name="baseAddress">The baseAddress of the table storage endpoint.</param>
/// <param name="credentials">Storage account credentials.</param>
/// <remarks>
/// For each table, the class exposes one or more IQueryable<T> properties, where T is a
/// TableServiceEntity derived class with the required schema.
/// </remarks>
public static void CreateTablesFromModel(Type serviceContextType, string baseAddress, StorageCredentials credentials)
{
CloudTableClient.CreateTablesFromModel(serviceContextType, baseAddress, credentials);
CloudTableClient tableStorage = new CloudTableClient(baseAddress, credentials);
// Execute conditionally for development storage only
if (tableStorage.BaseUri.IsLoopback)
{
var properties = serviceContextType.GetProperties(BindingFlags.Instance | BindingFlags.Public);
foreach (var table in properties.Where(p => p.PropertyType.IsGenericType && p.PropertyType.GetGenericTypeDefinition() == typeof(IQueryable <>)))
{
TableServiceEntity entity = Activator.CreateInstance(table.PropertyType.GetGenericArguments()[0]) as TableServiceEntity;
if (entity != null)
{
InitializeTableSchemaFromEntity(tableStorage, table.Name, entity);
}
}
}
}
private static void InitializeTableSchemaFromEntity(CloudTableClient tableStorage, string entityName, TableServiceEntity entity)
{
TableServiceContext context = tableStorage.GetDataServiceContext();
DateTime now = DateTime.UtcNow;
entity.PartitionKey = Guid.NewGuid().ToString();
entity.RowKey = Guid.NewGuid().ToString();
Array.ForEach(entity.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance), p =>
{
if ((p.Name != "PartitionKey") && (p.Name != "RowKey") && (p.Name != "Timestamp"))
{
if (p.PropertyType == typeof(string))
{
p.SetValue(entity, Guid.NewGuid().ToString(), null);
}
else if (p.PropertyType == typeof(DateTime))
{
p.SetValue(entity, now, null);
}
}
});
context.AddObject(entityName, entity);
context.SaveChangesWithRetries();
context.DeleteObject(entity);
context.SaveChangesWithRetries();
}
void InsertOrReplace(CloudTableClient tables, string tableName)
{
var context = GetTableServiceContext(tables);
var es = new TableServiceEntity[] {
new EntityOne("001","000","Apple II", "レインボーなやつ"), // replace
new EntityOne("001","010","Apple IIc", "白かった"), // insert
new EntityOneSub(data[2]), // replace
new EntityOne("001","003", null, null), // replace
};
// Updateの時は、Etagが*あるいは読み込んだ時のEtagをのIf-Match ヘッダーを付ける。
// Inset Or Replaceのときは、If-Matchヘッダー自体を付けない
// したがって、Attachして、SendingRequest の時にIf-Matchヘッダーを削除する
foreach (var e in es)
{
context.AttachTo(tableName, e);
context.UpdateObject(e);
}
//
context.SendingRequest += (sender, args) => {
var request = args.Request as HttpWebRequest;
logger.Debug(m => m("Method:{0}, If-Match:{1}, Uri:{2}", request.Method, request.Headers["If-Match"], request.RequestUri));
};
// Insert Or Replace の場合は、MethodがPUT、SaveChangesOptions.ReplaceOnUpdateを指定するとPUTになる
var option = SaveChangesOptions.ReplaceOnUpdate | SaveChangesOptions.Batch;
context.SaveChangesWithRetries(option);
DumpContext("Dump TableServiceContext", context);
}