package session-postgresql-lwt

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package session-postgresql-lwt
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Module Session_postgresql_lwtSource

PostgreSQL backend using the Session.S.Future signature with Async.

The default expiry period is one week. The code expects the following table and index to be in pace:

CREATE TABLE IF NOT EXISTS session (
  session_key       char(40),
  expire_date       timestamp (2) with time zone,
  session_data      text
);

CREATE INDEX session_key_idx ON session (session_key);

Note that this module does not do utilize non-blocking IO but instead runs each synchronous operation in a thread.

include Session.S.Future with type t = Postgresql.connection and type +'a io = 'a Lwt.t and type key = string and type value = string and type period = int64
type 'a io = 'a Lwt.t
type key = string
type value = string
type period = int64
val default_period : t -> period
val generate : ?expiry:period -> ?value:value -> t -> key io
val clear : t -> key -> unit io
val get : t -> key -> (value * period, Session__S.error) result io
val set : ?expiry:period -> t -> key -> value -> unit io
Sourceval connect : ?host:string -> ?hostaddr:string -> ?port:string -> ?dbname:string -> ?user:string -> ?password:string -> ?options:string -> ?tty:string -> ?requiressl:string -> ?conninfo:string -> ?startonly:bool -> unit -> t Lwt.t

Create a connection to a postgresql database.

This is an alias for the connection constructor. If you have an existing connection to a database with the appropriate tables set up, you are more than welcome to use it.