Portability	portable
Stability	experimental
Maintainer	Stefan Schmidt (stefanschmidt@web.de)

Holumbus.FileSystem.FileSystem

Contents

Datatypes
Configuration
Creation and Destruction
Operations

Description

Version : 0.1

Synopsis

Datatypes

type FileId = String Source

The file-identifier, should be unique in the whole system and be an instance of the classes show, eq, ord and binary

type FileContent = ByteString Source

getContentLength :: FileContent -> Integer Source

data FileData Source

metadata of a file, known by the storage.

Constructors

MkFileData
Fields fd_FileId :: FileId filename fd_Size :: Integer filesize fd_CreationDate :: UTCTime creation date fd_LastModifiedDate :: UTCTime last modified date fd_Hashvalue :: Integer hash value

Instances

Show FileData
Binary FileData

data FileSystem Source

Instances

Show FileSystem
Debug FileSystem

Configuration

data FSStandaloneConf Source

Constructors

FSStandaloneConf
Fields fstc_StreamName :: StreamName fstc_StoragePath :: FilePath fstc_StorageFile :: FilePath

defaultFSStandaloneConfig :: FSStandaloneConf Source

data FSControllerConf Source

Constructors

FSControllerConf
Fields fcoc_StreamName :: StreamName fcoc_PortNumber :: Maybe PortNumber

defaultFSControllerConfig :: FSControllerConf Source

data FSNodeConf Source

Constructors

FSNodeConf
Fields fnoc_StreamName :: StreamName fnoc_SocketId :: Maybe SocketId fnoc_StoragePath :: FilePath fnoc_StorageFile :: FilePath

defaultFSNodeConfig :: FSNodeConf Source

data FSClientConf Source

Constructors

FSClientConf
Fields fclc_StreamName :: StreamName fclc_SocketId :: Maybe SocketId

defaultFSClientConfig :: FSClientConf Source

Creation and Destruction

mkStandaloneFileSystem :: FSStandaloneConf -> IO FileSystem Source

mkFileSystemController :: FSControllerConf -> IO FileSystem Source

mkFileSystemNode :: FSNodeConf -> IO FileSystem Source

mkFileSystemClient :: FSClientConf -> IO FileSystem Source

closeFileSystem :: FileSystem -> IO ()Source

Closes the filesystem.

Operations

getMySiteId :: FileSystem -> IO SiteId Source

getFileSites :: FileId -> FileSystem -> IO (Set SiteId)Source

Get a set of all sites the file exists.

getNearestNodePortWithFile :: FileId -> FileSystem -> IO (Maybe NodePort)Source

gets the nearest NodePort with our fileId

getNearestNodePortForFile :: FileId -> Integer -> FileSystem -> IO (Maybe NodePort)Source

gets the nearest NodePort on which we can create our fileId. we need the content-size to get a node with enough space.

containsFile :: FileId -> FileSystem -> IO Bool Source

Checks if a file is in the filesystem

createFile :: FileId -> FileContent -> FileSystem -> IO ()Source

Creates a file in the filesystem.

createFiles :: [(FileId, FileContent)] -> FileSystem -> IO ()Source

Creates a list of files in the filesystem.

appendFile :: FileId -> FileContent -> FileSystem -> IO ()Source

Appends a file in the fileSystem.

deleteFile :: FileId -> FileSystem -> IO ()Source

Deletes a file from the filesystem.

getFileContent :: FileId -> FileSystem -> IO (Maybe FileContent)Source

Gets the file content from the nearest site whitch holds the file

getMultiFileContent :: [FileId] -> FileSystem -> IO [(FileId, FileContent)]Source

Gets the file content from the nearest site whitch holds the file

getFileData :: FileId -> FileSystem -> IO (Maybe FileData)Source

Gets the file data from the nearest site whitch holds the file

isFileLocal :: FileId -> FileSystem -> IO Bool Source

Tests, if the local storage (if one exists) holds the file