package caqti-async

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Async support for Caqti

Install

Dune Dependency

github.com Readme Changelog Edit opam file Versions (17)

Authors

P

Petter A. Urkedal

Maintainers

P

paurkedal@gmail.com

Sources

caqti-0.9.0.tbz

sha256=4c84a16d983d0fed2786f536a3fa4d8fa113b8b30b4deea4a74772582d5489b2

md5=42a2e2d3b73d7fbaecc618549aad2865

doc/caqti-async.v1/Caqti1_async/Pool/index.html

Module `Caqti1_async.Pool`

This is an instantiation of Caqti_pool for the chosen thread monad.

type 'a t

val create : 
  ?max_size:int ->
  ?check:('a -> (bool -> unit) -> unit) ->
  ?validate:('a -> bool Async.Deferred.Or_error.t) ->
  (unit -> 'a Async.Deferred.Or_error.t) ->
  ('a -> unit Async.Deferred.Or_error.t) ->
  'a t

(internal) create alloc free is a pool of resources allocated by alloc and freed by free. This is primarily indented for implementing the connect_pool functions.

parameter max_size
Maximum number of resources to allocate at any given time.

parameter check
A function used to check a resource after use.

parameter validate
A function to check before use that a resource is still valid.

val size : 'a t -> int

size pool is the current number of open resources in pool.

val use : 
  ?priority:float ->
  ('a -> 'b Async.Deferred.Or_error.t) ->
  'a t ->
  'b Async.Deferred.Or_error.t

use f pool calls f on a resource drawn from pool, handing back the resource to the pool when f exits.

parameter priority
Requests for the resource are handled in decreasing order of priority. The default priority is 0.0.

val drain : 'a t -> unit Async.Deferred.Or_error.t

drain pool closes all resources in pool. The pool is still usable, as new resources will be created on demand.