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85 lines
2.7 KiB
Markdown
85 lines
2.7 KiB
Markdown
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# Class: Pool
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Extends: `undici.Dispatcher`
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A pool of [Client](Client.md) instances connected to the same upstream target.
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Requests are not guaranteed to be dispatched in order of invocation.
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## `new Pool(url[, options])`
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Arguments:
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* **url** `URL | string` - It should only include the **protocol, hostname, and port**.
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* **options** `PoolOptions` (optional)
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### Parameter: `PoolOptions`
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Extends: [`ClientOptions`](Client.md#parameter-clientoptions)
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* **factory** `(origin: URL, opts: Object) => Dispatcher` - Default: `(origin, opts) => new Client(origin, opts)`
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* **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.
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* **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).
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## Instance Properties
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### `Pool.closed`
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Implements [Client.closed](Client.md#clientclosed)
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### `Pool.destroyed`
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Implements [Client.destroyed](Client.md#clientdestroyed)
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### `Pool.stats`
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Returns [`PoolStats`](PoolStats.md) instance for this pool.
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## Instance Methods
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### `Pool.close([callback])`
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Implements [`Dispatcher.close([callback])`](Dispatcher.md#dispatcherclosecallback-promise).
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### `Pool.destroy([error, callback])`
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Implements [`Dispatcher.destroy([error, callback])`](Dispatcher.md#dispatcherdestroyerror-callback-promise).
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### `Pool.connect(options[, callback])`
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See [`Dispatcher.connect(options[, callback])`](Dispatcher.md#dispatcherconnectoptions-callback).
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### `Pool.dispatch(options, handler)`
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Implements [`Dispatcher.dispatch(options, handler)`](Dispatcher.md#dispatcherdispatchoptions-handler).
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### `Pool.pipeline(options, handler)`
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See [`Dispatcher.pipeline(options, handler)`](Dispatcher.md#dispatcherpipelineoptions-handler).
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### `Pool.request(options[, callback])`
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See [`Dispatcher.request(options [, callback])`](Dispatcher.md#dispatcherrequestoptions-callback).
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### `Pool.stream(options, factory[, callback])`
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See [`Dispatcher.stream(options, factory[, callback])`](Dispatcher.md#dispatcherstreamoptions-factory-callback).
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### `Pool.upgrade(options[, callback])`
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See [`Dispatcher.upgrade(options[, callback])`](Dispatcher.md#dispatcherupgradeoptions-callback).
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## Instance Events
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### Event: `'connect'`
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See [Dispatcher Event: `'connect'`](Dispatcher.md#event-connect).
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### Event: `'disconnect'`
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See [Dispatcher Event: `'disconnect'`](Dispatcher.md#event-disconnect).
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### Event: `'drain'`
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See [Dispatcher Event: `'drain'`](Dispatcher.md#event-drain).
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