package caqti

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Unified interface to relational database libraries

Install

Dune Dependency

github.com Readme Changelog Edit opam file Versions (21)

Authors

P

Petter A. Urkedal <paurkedal@gmail.com>

Maintainers

P

Petter A. Urkedal <paurkedal@gmail.com>

Sources

caqti-v1.2.0.tbz

sha256=bc67a61e9c43f1cd9ab54476bdd4ea6495decd281aececcb4062c29713a7391d

sha512=17018a142bd29be3b503c6b6f5320ec65b3418a46bb82c0127f5ff198890d56bd9e50263ce20930e8c6e0dadb8bdf5f43b6479fc111948d44e3170715e40c290

doc/caqti.blocking/Caqti_blocking/Pool/index.html

Module `Caqti_blocking.Pool`

A pool implementation for the current concurrency library.

Sourcetype ('a, +'e) t

Source

val create : 
  ?max_size:int ->
  ?check:('a -> (bool -> unit) -> unit) ->
  ?validate:('a -> bool future) ->
  (unit -> ('a, 'e) result future) ->
  ('a -> unit future) ->
  ('a, 'e) 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.

Sourceval size : ('a, 'e) t -> int

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

Source

val use : 
  ?priority:float ->
  ('a -> ('b, 'e) result future) ->
  ('a, 'e) t ->
  ('b, 'e) result future

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.

Sourceval drain : ('a, 'e) t -> unit future

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