11cb0ef41Sopenharmony_ci# Class: Pool 21cb0ef41Sopenharmony_ci 31cb0ef41Sopenharmony_ciExtends: `undici.Dispatcher` 41cb0ef41Sopenharmony_ci 51cb0ef41Sopenharmony_ciA pool of [Client](Client.md) instances connected to the same upstream target. 61cb0ef41Sopenharmony_ci 71cb0ef41Sopenharmony_ciRequests are not guaranteed to be dispatched in order of invocation. 81cb0ef41Sopenharmony_ci 91cb0ef41Sopenharmony_ci## `new Pool(url[, options])` 101cb0ef41Sopenharmony_ci 111cb0ef41Sopenharmony_ciArguments: 121cb0ef41Sopenharmony_ci 131cb0ef41Sopenharmony_ci* **url** `URL | string` - It should only include the **protocol, hostname, and port**. 141cb0ef41Sopenharmony_ci* **options** `PoolOptions` (optional) 151cb0ef41Sopenharmony_ci 161cb0ef41Sopenharmony_ci### Parameter: `PoolOptions` 171cb0ef41Sopenharmony_ci 181cb0ef41Sopenharmony_ciExtends: [`ClientOptions`](Client.md#parameter-clientoptions) 191cb0ef41Sopenharmony_ci 201cb0ef41Sopenharmony_ci* **factory** `(origin: URL, opts: Object) => Dispatcher` - Default: `(origin, opts) => new Client(origin, opts)` 211cb0ef41Sopenharmony_ci* **connections** `number | null` (optional) - Default: `null` - The number of `Client` instances to create. When set to `null`, the `Pool` instance will create an unlimited amount of `Client` instances. 221cb0ef41Sopenharmony_ci* **interceptors** `{ Pool: DispatchInterceptor[] } }` - Default: `{ Pool: [] }` - A list of interceptors that are applied to the dispatch method. Additional logic can be applied (such as, but not limited to: 302 status code handling, authentication, cookies, compression and caching). 231cb0ef41Sopenharmony_ci 241cb0ef41Sopenharmony_ci## Instance Properties 251cb0ef41Sopenharmony_ci 261cb0ef41Sopenharmony_ci### `Pool.closed` 271cb0ef41Sopenharmony_ci 281cb0ef41Sopenharmony_ciImplements [Client.closed](Client.md#clientclosed) 291cb0ef41Sopenharmony_ci 301cb0ef41Sopenharmony_ci### `Pool.destroyed` 311cb0ef41Sopenharmony_ci 321cb0ef41Sopenharmony_ciImplements [Client.destroyed](Client.md#clientdestroyed) 331cb0ef41Sopenharmony_ci 341cb0ef41Sopenharmony_ci### `Pool.stats` 351cb0ef41Sopenharmony_ci 361cb0ef41Sopenharmony_ciReturns [`PoolStats`](PoolStats.md) instance for this pool. 371cb0ef41Sopenharmony_ci 381cb0ef41Sopenharmony_ci## Instance Methods 391cb0ef41Sopenharmony_ci 401cb0ef41Sopenharmony_ci### `Pool.close([callback])` 411cb0ef41Sopenharmony_ci 421cb0ef41Sopenharmony_ciImplements [`Dispatcher.close([callback])`](Dispatcher.md#dispatcherclosecallback-promise). 431cb0ef41Sopenharmony_ci 441cb0ef41Sopenharmony_ci### `Pool.destroy([error, callback])` 451cb0ef41Sopenharmony_ci 461cb0ef41Sopenharmony_ciImplements [`Dispatcher.destroy([error, callback])`](Dispatcher.md#dispatcherdestroyerror-callback-promise). 471cb0ef41Sopenharmony_ci 481cb0ef41Sopenharmony_ci### `Pool.connect(options[, callback])` 491cb0ef41Sopenharmony_ci 501cb0ef41Sopenharmony_ciSee [`Dispatcher.connect(options[, callback])`](Dispatcher.md#dispatcherconnectoptions-callback). 511cb0ef41Sopenharmony_ci 521cb0ef41Sopenharmony_ci### `Pool.dispatch(options, handler)` 531cb0ef41Sopenharmony_ci 541cb0ef41Sopenharmony_ciImplements [`Dispatcher.dispatch(options, handler)`](Dispatcher.md#dispatcherdispatchoptions-handler). 551cb0ef41Sopenharmony_ci 561cb0ef41Sopenharmony_ci### `Pool.pipeline(options, handler)` 571cb0ef41Sopenharmony_ci 581cb0ef41Sopenharmony_ciSee [`Dispatcher.pipeline(options, handler)`](Dispatcher.md#dispatcherpipelineoptions-handler). 591cb0ef41Sopenharmony_ci 601cb0ef41Sopenharmony_ci### `Pool.request(options[, callback])` 611cb0ef41Sopenharmony_ci 621cb0ef41Sopenharmony_ciSee [`Dispatcher.request(options [, callback])`](Dispatcher.md#dispatcherrequestoptions-callback). 631cb0ef41Sopenharmony_ci 641cb0ef41Sopenharmony_ci### `Pool.stream(options, factory[, callback])` 651cb0ef41Sopenharmony_ci 661cb0ef41Sopenharmony_ciSee [`Dispatcher.stream(options, factory[, callback])`](Dispatcher.md#dispatcherstreamoptions-factory-callback). 671cb0ef41Sopenharmony_ci 681cb0ef41Sopenharmony_ci### `Pool.upgrade(options[, callback])` 691cb0ef41Sopenharmony_ci 701cb0ef41Sopenharmony_ciSee [`Dispatcher.upgrade(options[, callback])`](Dispatcher.md#dispatcherupgradeoptions-callback). 711cb0ef41Sopenharmony_ci 721cb0ef41Sopenharmony_ci## Instance Events 731cb0ef41Sopenharmony_ci 741cb0ef41Sopenharmony_ci### Event: `'connect'` 751cb0ef41Sopenharmony_ci 761cb0ef41Sopenharmony_ciSee [Dispatcher Event: `'connect'`](Dispatcher.md#event-connect). 771cb0ef41Sopenharmony_ci 781cb0ef41Sopenharmony_ci### Event: `'disconnect'` 791cb0ef41Sopenharmony_ci 801cb0ef41Sopenharmony_ciSee [Dispatcher Event: `'disconnect'`](Dispatcher.md#event-disconnect). 811cb0ef41Sopenharmony_ci 821cb0ef41Sopenharmony_ci### Event: `'drain'` 831cb0ef41Sopenharmony_ci 841cb0ef41Sopenharmony_ciSee [Dispatcher Event: `'drain'`](Dispatcher.md#event-drain). 85