FileTools
A set of helper routine for file operations
Functions and values
| Function or value | Description |
AppendToFile filename content
Signature: filename:string -> content:string -> unit
|
Append a string to file |
CreateFileStreamForRead fname
Signature: fname:string -> FileStream
|
Create a file stream to read |
CreateFileStreamForWrite fname
Signature: fname:string -> FileStream
|
Create a file stream to write, and make the file accessible to everyone (for shared use in a cluster) Caller should be responsible for dispose the returned stream. |
DirectoryInfoCreateIfNotExists dir
Signature: dir:string -> DirectoryInfo
|
Return DirectoryInfo, create the directory if it doesn't exist. The directory created this way will allow access control by everyone to ease use in cluster scenario. |
GetDrive dir
Signature: dir:string -> string
|
Get drive letter |
ReadBytesFromFile filename
Signature: filename:string -> byte []
|
Read a byte[] from files |
ReadFromFile filename
Signature: filename:string -> string
|
read a string from file |
SaveToFile filename content
Signature: filename:string -> content:string -> unit
|
save a string to file, do not write if we find that the file is not writable. |
TouchFile fileName
Signature: fileName:string -> unit
|
Touch a file, change its last write time to now. |
WriteBytesToFile filename bytes
Signature: filename:string -> bytes:byte [] -> unit
|
Write a byte[] to file |
WriteBytesToFileConcurrent (...)
Signature: filename:string -> bytes:byte [] -> unit
|
Write a byte[] to file, with possibility of multiple processes are writing to the exact same file at the same time. Such situation occurs for the Prajna daemon to write cluster metadata, DKV metadata, Assembly, dependencies file, etc.. WriteBytesToFileConcurrent checks if the file has been written concurrently, if that is the case, one of the process will verify (read) the file and make sure that is the same content that is to be written. |
WriteBytesToFileConcurrentCreate (...)
Signature: filename:string -> bytes:byte [] -> unit
|
Write a byte[] to file, create the directory of the file if it doesn't exist. The call deal with possibility of multiple processes are writing to the exact same file at the same time. Such situation occurs for the Prajna daemon to write cluster metadata, DKV metadata, Assembly, dependencies file, etc.. WriteBytesToFileConcurrent checks if the file has been written concurrently, if that is the case, one of the process will verify (read) the file and make sure that is the same content that is to be written. |
WriteBytesToFileCreate filename bytes
Signature: filename:string -> bytes:byte [] -> unit
|
Write a byte[] to file, create the directory of the file if it doesn't exist |
