public static Stream OpenReadFile(string serverGroup, Guid logicFileID)
{
RemoteStreamContext context = new RemoteStreamContext();
context.ServiceGroup = serverGroup;
context.FileID = logicFileID;
context.FileMode = FileMode.Open;
context.FileAccess = FileAccess.Read;
return(new RemoteStream(context));
}
private IRemoteFileStorage CreateServiceProxy(RemoteStreamContext context)
{
IRemoteFileStorage result = null;
if (!string.IsNullOrEmpty(context.ServiceGroup))
{
result = ServiceProxyProviderFactory.GetProvider(context.ServiceGroup,
FMPServiceProxyProviderManager.RemoteFileStorageServiceName) as IRemoteFileStorage;
}
return(result);
}
public RemoteStream(RemoteStreamContext context)
{
this.IsClose = true;
_contextWrapper = this.CreateWrapper();
this._contextWrapper.Initialize(context);
_lenght = _contextWrapper._fileLength;
_origin = _contextWrapper._origin;
_bufferCapacity = context.BufferSize;
this.IsClose = false;
this.NeededWrite = false;
}
public static Stream OpenWriteFile(string serverGroup, Guid logicFileID, UpdateMode updateMode, string clientFileName)
{
RemoteStreamContext context = new RemoteStreamContext();
context.ServiceGroup = serverGroup;
context.FileID = logicFileID;
context.FileMode = FileMode.OpenOrCreate;
context.FileAccess = FileAccess.ReadWrite;
context.UpdateMode = updateMode;
context.ClientFileName = clientFileName;
return(new RemoteStream(context));
}
/// <summary>
/// 打开文件
/// </summary>
/// <param name="serviceGroup"></param>
/// <param name="logicFileID"></param>
/// <param name="mode"></param>
/// <param name="access"></param>
/// <param name="updateMode"></param>
/// <param name="clientFileName"></param>
/// <returns></returns>
public static Stream OpenFile(string serviceGroup, Guid logicFileID, FileMode mode, FileAccess access, UpdateMode updateMode, string clientFileName)
{
RemoteStreamContext context = new RemoteStreamContext();
context.ServiceGroup = serviceGroup;
context.FileID = logicFileID;
context.FileMode = mode;
context.FileAccess = access;
context.UpdateMode = updateMode;
context.ClientFileName = clientFileName;
return(new RemoteStream(context));
}
internal void Initialize(RemoteStreamContext context)
{
__Error.CheckNullReference(context, "context");
if (context.FileID == Guid.Empty)
{
__Error.InvalidateFileID();
}
_context = context;
_proxy = CreateServiceProxy(context);
//Stopwatch w = new Stopwatch();
//w.Start();
_itemResult = FileManager.OpenFile(context, _proxy);
//w.Stop();
//Console.WriteLine("Open File execute times:" + w.ElapsedMilliseconds);
//_logicFileInfo = FileManager.GetFileInfo(context.FileID, context.Version);
if (context.FileMode == FileMode.None)
{
__Error.InvalidateFileMode();
}
FileAccess access = context.FileAccess;
if (FileMode.Truncate == context.FileMode)
{
access = FileAccess.Write;
}
LogicFileInfoData logicFileInfo = LogicFileInfo;
if (logicFileInfo == null)
{
if (context.FileMode == FileMode.Open ||
context.FileMode == FileMode.Append ||
context.FileMode == FileMode.Truncate)
{
__Error.NotExistsFileID(context.FileID);
}
}
if (logicFileInfo != null)
{
if (logicFileInfo.ReadOnly && this._canWrite)
{
__Error.FileReadOnly(context.FileID);
}
if (context.FileMode == FileMode.CreateNew)
{
__Error.ExistsFileID(context.FileID);
}
}
this._canRead = (access & FileAccess.Read) != 0;
this._canWrite = (access & FileAccess.Write) != 0;
PhysicalFileInfoData physicalFileInfo = this.PhysicalFileInfo;
if (physicalFileInfo != null)
{
this._fileLength = physicalFileInfo.FileLength;
}
if (context.FileMode == FileMode.Append)
{
_origin = _fileLength;
}
}
