Storage.Append_only
include Append_only_intf.S with type key = K.t and type value = V.t
Append-only stores are store where it is possible to read and add new values.
Read-only stores are store where it is only possible to read existing values.
type key = K.t
The type for keys.
type value = V.t
The type for raw values.
val mem : [> Import.read ] t -> key -> bool
mem t k
is true iff k
is present in t
.
val find : [> Import.read ] t -> key -> value option
find t k
is Some v
if k
is associated to v
in t
and None
is k
is not present in t
.
val add : [> Import.write ] t -> key -> value -> unit
Write the contents of a value to the store.
val close : 'a t -> unit
close t
frees up all the resources associated with t
. Any operations run on a closed handle will raise Closed
.
val batch : Import.read t -> ([ Import.read | Import.write ] t -> 'a) -> 'a
batch t f
applies the writes in f
in a separate batch. The exact guarantees depend on the implementation.
val init : Conf.t -> Import.read t
init config
is a function returning fresh store handles, with the configuration config
, which is provided by the backend.