mirror of
https://github.com/logos-storage/nim-datastore.git
synced 2026-01-03 14:13:09 +00:00
59 lines
1.8 KiB
Nim
59 lines
1.8 KiB
Nim
import pkg/questionable/results
|
|
import pkg/upraises
|
|
|
|
import std/algorithm
|
|
import std/options
|
|
import ./threads/databuffer
|
|
import ./threads/threadresult
|
|
import ./threads/semaphore
|
|
import ./key
|
|
import ./types
|
|
|
|
export databuffer, threadresult, semaphore, types
|
|
export upraises, results, SortOrder
|
|
|
|
type
|
|
KeyId* = object
|
|
## serialized Key ID, equivalent to `key.id()`
|
|
data*: DataBuffer
|
|
|
|
DbKey* = string | KeyId
|
|
DbVal* = seq[byte] | DataBuffer
|
|
|
|
DbBatchEntry*[K, V] = tuple[key: K, data: V]
|
|
|
|
DbQuery*[K] = object
|
|
key*: K # Key to be queried
|
|
value*: bool # Flag to indicate if data should be returned
|
|
limit*: int # Max items to return - not available in all backends
|
|
offset*: int # Offset from which to start querying - not available in all backends
|
|
sort*: SortOrder # Sort order - not available in all backends
|
|
|
|
DbQueryHandle*[K, V, T] = object
|
|
query*: DbQuery[K]
|
|
cancel*: bool
|
|
closed*: bool
|
|
env*: T
|
|
|
|
DbQueryResponse*[K, V] = tuple[key: Option[K], data: V]
|
|
|
|
proc `$`*(id: KeyId): string = $(id.data)
|
|
|
|
proc toKey*(tp: typedesc[KeyId], id: cstring): KeyId = KeyId.new(id)
|
|
proc toKey*(tp: typedesc[string], id: cstring): string = $(id)
|
|
|
|
template toVal*(tp: typedesc[DataBuffer], id: openArray[byte]): DataBuffer = DataBuffer.new(id)
|
|
template toVal*(tp: typedesc[seq[byte]], id: openArray[byte]): seq[byte] = @(id)
|
|
|
|
proc new*(tp: typedesc[KeyId], id: cstring): KeyId =
|
|
KeyId(data: DataBuffer.new(id.toOpenArray(0, id.len()-1)))
|
|
|
|
proc new*(tp: typedesc[KeyId], id: string): KeyId =
|
|
KeyId(data: DataBuffer.new(id))
|
|
|
|
proc toKey*(key: KeyId): Key {.inline, raises: [].} =
|
|
Key.init(key.data).expect("expected valid key here for but got `" & $key.data & "`")
|
|
|
|
template toOpenArray*(x: DbKey): openArray[char] =
|
|
x.data.toOpenArray(char)
|