package session-postgresql-async

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in-package search v0.2.0

session-postgresql-async
- Session_postgresql_async
  - Pool

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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 Async.Deferred.t
   and type key = string
   and type value = string
   and type period = int64

type !'a0 io = 'a Async.Deferred.t

type t = Postgresql.connection

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) Stdlib.result io

val set : ?expiry:period -> t -> key -> value -> unit io

val 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 Async.Deferred.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.

val set_default_period : t -> period -> unit

set_default_period t period sets the default expiry period of t. This will only affect future operations.

module Pool : sig ... end

PostgreSQL backend using the Session.S.Future siganture with Aysnc, together with connection pooling via a Throttle