public override void write(File file)
{
Console.WriteLine("#DS write " + file.FileName + " is waiting because the server is freezed ");
monitor.WaitOne();
Console.WriteLine("#DS write " + file.FileName + " will execute ");
new DSstateNormal(Ds).write(file);
}
//receives a new filemetadata,
//inserts the file in a roundRobin manner and returns
//the position in witch the fileMetadata was saved
public void addFileContent(File file)
{
//int filePosition = nextFreePosition;
int filePosition = findRegisterPosition();
Files[filePosition] = file;
//nextFreePosition = ( nextFreePosition + 1 ) % capacity;
// return filePosition;
}
public static File readFileFromDisk(String clientName, String name, Int32 version)
{
System.Xml.Serialization.XmlSerializer reader =
new System.Xml.Serialization.XmlSerializer(typeof(File));
string dirName = Properties.Resources.TEMP_DIR + "\\" + clientName + getFileName(name, version) ;
System.IO.StreamReader fileReader = new System.IO.StreamReader(dirName);
File file = new File();
file = (File) reader.Deserialize(fileReader);
fileReader.Close();
return file;
}
public void write(File file)
{
if (AccessCounter.ContainsKey(file.FileName))
{
FileAccessCounter counter = AccessCounter[file.FileName];
counter.WriteCounter++;
}
else
{
FileAccessCounter fileCounter = new FileAccessCounter(file.FileName);
fileCounter.WriteCounter++;
AccessCounter[file.FileName] = fileCounter;
}
State.write(file);
//WriteCounter++;
}
public WriteFileService(ClientState clientState, File file)
: base(clientState)
{
NewFile = file;
}
public static void writeFileToDisk(File file, String clientName)
{
string dirName = Properties.Resources.TEMP_DIR + "\\" + clientName;
Util.createDir(dirName);
System.Xml.Serialization.XmlSerializer writer =
new System.Xml.Serialization.XmlSerializer(typeof(File));
System.IO.StreamWriter fileWriter = new System.IO.StreamWriter(@dirName + getFileName(file.FileName, file.Version));
writer.Serialize(fileWriter, file);
fileWriter.Close();
}
public override void write(File file)
{
if (file == null)
{
return;
}
if (!Ds.FileLocks.ContainsKey(file.FileName))
{
Ds.FileLocks.Add(file.FileName, new System.Threading.ReaderWriterLockSlim());
}
Ds.FileLocks[file.FileName].EnterWriteLock();
if (Ds.Files.ContainsKey(file.FileName))
{
if (Ds.Files[file.FileName].Version > file.Version)
{
//trying to write an old version -> discard the write
Ds.FileLocks[file.FileName].ExitWriteLock();
return;
}
else if (Ds.Files[file.FileName].Version == file.Version)
{
int actualClientId = getClientId(Ds.Files[file.FileName].clientId);
int newClientId = getClientId(file.clientId);
Console.WriteLine("DS write - actual: " + actualClientId + ", new: " + newClientId);
if (actualClientId < newClientId)
{
//in case we have a draw (concurrent writes from diferent clients)
//we save the version of the client with smallest id and so we discard the
//request if the new user has a bigger id than the actual
Ds.FileLocks[file.FileName].ExitWriteLock();
return;
}
}
//the write will be persisted!!
//if we allready have an old version of the file we delete it
Ds.Files.Remove(file.FileName);
}
//creates a new file
Ds.Files.Add(file.FileName, file);
try
{
Console.WriteLine("#DS: write fileName: " + file.FileName + ", version: " + file.Version + ", content: " + System.Text.Encoding.UTF8.GetString(file.Content));
Util.writeFileToDisk(file, "" + Ds.Id);
Ds.makeCheckpoint();
}
finally
{
Ds.FileLocks[file.FileName].ExitWriteLock();
}
Ds.WriteCounter++;
}
public abstract void write(File file);
public void setFileContent(int position, File fileContent)
{
Files[position] = fileContent;
}
public File(File file)
{
FileName = file.FileName;
Version = file.Version;
Content = file.Content;
}
public BufferedWriteRequest(File file)
{
File = file;
}
public override void write(File file)
{
failError(file.FileName);
}
