public ClientProto.StatusResponse MoveFile(ClientProto.DoublePath doublePath)
{
try
{
string path = doublePath.Fullpath;
string newPath = doublePath.Newpath;
string oldName = TraverseFileSystem(path);
Folder oldFolder = CurrentDirectory;
string newName = TraverseFileSystem(newPath);
FileSystem.File toBeMoved = oldFolder.files[oldName];
oldFolder.files.Remove(oldName);
toBeMoved.name = newName;
toBeMoved.path = $"{CurrentDirectory.path}/{newName}";
CurrentDirectory.files.Add(newName, toBeMoved);
SaveFileDirectory();
return(new ClientProto.StatusResponse {
Type = ClientProto.StatusResponse.Types.StatusType.Success
});
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return(new ClientProto.StatusResponse {
Type = ClientProto.StatusResponse.Types.StatusType.Fail, Message = "Internal Server Failure"
});
}
}
public ClientProto.StatusResponse CreateFile(ClientProto.Path fullPath)
{
// Wrap in try block, if fails then returns false
try
{
// If a file exists, fail the execution
if (FileExists(fullPath.FullPath))
{
return(new ClientProto.StatusResponse {
Type = ClientProto.StatusResponse.Types.StatusType.FileExists
});
}
// Creates the file
FileSystem.File file = new FileSystem.File();
file.name = TraverseFileSystem(fullPath.FullPath);
file.path = fullPath.FullPath;
// Saves to file system
CurrentDirectory.files.Add(file.name, file);
SaveFileDirectory();
//It done did it
return(new ClientProto.StatusResponse {
Type = ClientProto.StatusResponse.Types.StatusType.Ok
});
}
catch (Exception e)
{
// Logs the error to console
Console.WriteLine(e.Message);
return(new ClientProto.StatusResponse {
Type = ClientProto.StatusResponse.Types.StatusType.Fail
});
}
}
public ClientProto.BlockMessage ReadFile(ClientProto.Path wrappedPath)
{
try
{
string path = wrappedPath.FullPath;
// Breaks up the path variable into the path's segments
string name = TraverseFileSystem(path);
// Grabs the parent directory
FileSystem.File toBeRead = CurrentDirectory.files[name];
List <ClientProto.BlockInfo> blockInfos = new List <ClientProto.BlockInfo>();
List <string> ipAddresses;
//checks block ids based on the file requested
foreach (Guid blockID in toBeRead.data)
{
//cross references those against the list of ids to ips
//choose ips for each block of the file
ipAddresses = BlockID_To_ip[blockID];
blockInfos.Add(new ClientProto.BlockInfo {
BlockId = new ClientProto.UUID {
Value = blockID.ToString()
},
BlockSize = Constants.MaxBlockSize,
IpAddress = { ipAddresses }
});
}
//send back to client the ips and what to search for on the datanode
return(new ClientProto.BlockMessage {
BlockInfo = { blockInfos },
FileSize = toBeRead.fileSize,
Type = ClientProto.BlockMessage.Types.StatusType.Success
});
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return(new ClientProto.BlockMessage {
BlockInfo = { new List <ClientProto.BlockInfo>() },
FileSize = 0,
Type = ClientProto.BlockMessage.Types.StatusType.Fail
});
}
}
public ClientProto.StatusResponse DeleteFile(ClientProto.Path wrappedPath)
{
try
{
string path = wrappedPath.FullPath;
string name = TraverseFileSystem(path);
FileSystem.File toBeDeleted = CurrentDirectory.files[name];
//queue up requests for each of the datanodes that have blocks
// to delete as soon as they send in heartbeat/block report
foreach (Guid blockID in toBeDeleted.data)
{
foreach (string ipAddress in BlockID_To_ip[blockID])
{
DataNodeManager.Instance.AddRequestToNode(ipAddress, new DataNodeProto.BlockCommand
{
Action = DataNodeProto.BlockCommand.Types.Action.Delete,
BlockList = new DataNodeProto.BlockList
{
BlockId = { new DataNodeProto.UUID {
Value = blockID.ToString()
} }
}
});
}
BlockID_To_ip.Remove(blockID);
}
//remove file from directory system
CurrentDirectory.files.Remove(name);
SaveFileDirectory();
return(new ClientProto.StatusResponse {
Type = ClientProto.StatusResponse.Types.StatusType.Success
});
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return(new ClientProto.StatusResponse {
Type = ClientProto.StatusResponse.Types.StatusType.Fail
});
}
}
public ClientProto.ListOfNodesList ListDataNodesStoringReplicas(ClientProto.Path wrappedPath)
{
try
{
string path = wrappedPath.FullPath;
//cross reference file name to block ids and locations
string name = TraverseFileSystem(path);
List <string> responseLocations = new List <string>();
FileSystem.File requestedFile = CurrentDirectory.files[name];
List <ClientProto.ListOfNodes> responseList = new List <ClientProto.ListOfNodes>();
//queue up requests for each of the datanodes that have blocks
// to delete as soon as they send in heartbeat/block report
foreach (Guid blockID in requestedFile.data)
{
List <string> ips = new List <string>();
foreach (string ipAddress in BlockID_To_ip[blockID])
{
ips.Add(ipAddress);
}
responseList.Add(new ClientProto.ListOfNodes {
BlockId = blockID.ToString(), NodeId = { ips }
});
}
return(new ClientProto.ListOfNodesList {
ListOfNodes = { responseList }, Type = ClientProto.ListOfNodesList.Types.StatusType.Success
});
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return(new ClientProto.ListOfNodesList {
ListOfNodes = { new List <ClientProto.ListOfNodes>() },
Type = ClientProto.ListOfNodesList.Types.StatusType.FileDoesNotExist, Message = "Specified File Not Found."
});
}
}
public ClientProto.BlockInfo AddBlockToFile(ClientProto.BlockInfo addedBlock)
{
try
{
string path = addedBlock.FullPath;
string name = TraverseFileSystem(path);
FileSystem.File file = CurrentDirectory.files[name];
file.fileSize += addedBlock.BlockSize;
// to be used to send back a write request to the client
List <string> responseRequests = new List <string>();
// stores blockID and adds it to the file.
Guid id = Guid.Parse(addedBlock.BlockId.Value);
if (!file.data.Contains(id))
{
file.data.Add(id);
}
List <string> ipAddresses = DataNodeManager.Instance.GetDataNodesForReplication();
// add it to the BlockID to DataNode Dictionary
BlockID_To_ip.TryAdd(id, new List <string>());
SaveFileDirectory();
return(new ClientProto.BlockInfo {
BlockId = new ClientProto.UUID {
Value = id.ToString()
}, FullPath = path, BlockSize = addedBlock.BlockSize, IpAddress = { ipAddresses }
});
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return(null);
}
}