ALife.Creatur.Database.CachedFileSystem

Description

A database that stores each record in a separate file and maintains a cache of recently-accessed records. The name of the file is the record's key.

Synopsis

Documentation

A simple database where each record is stored in a separate file, and the name of the file is the record's key.

Instances

Eq r => Eq (CachedFSDatabase r) Source #
Methods (==) :: CachedFSDatabase r -> CachedFSDatabase r -> Bool # (/=) :: CachedFSDatabase r -> CachedFSDatabase r -> Bool #
Show r => Show (CachedFSDatabase r) Source #
Methods showsPrec :: Int -> CachedFSDatabase r -> ShowS # show :: CachedFSDatabase r -> String # showList :: [CachedFSDatabase r] -> ShowS #
SizedRecord r => Database (CachedFSDatabase r) Source #
Associated Types type DBRecord (CachedFSDatabase r) :: * Source # Methods keys :: StateT (CachedFSDatabase r) IO [String] Source # numRecords :: StateT (CachedFSDatabase r) IO Int Source # archivedKeys :: StateT (CachedFSDatabase r) IO [String] Source # lookup :: String -> StateT (CachedFSDatabase r) IO (Either String (DBRecord (CachedFSDatabase r))) Source # lookupInArchive :: String -> StateT (CachedFSDatabase r) IO (Either String (DBRecord (CachedFSDatabase r))) Source # store :: DBRecord (CachedFSDatabase r) -> StateT (CachedFSDatabase r) IO () Source # delete :: String -> StateT (CachedFSDatabase r) IO () Source #
type DBRecord (CachedFSDatabase r) Source #
type DBRecord (CachedFSDatabase r) = r

mkFSDatabase d (re)creates the FSDatabase in the directory d.