@loopback/docs

--- lang: en title: 'API docs: pooling' keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI sidebar: lb4_sidebar editurl: https://github.com/loopbackio/loopback-next/tree/master/extensions/pooling permalink: /doc/en/lb4/apidocs.pooling.html ---  [Home](./index.md) > [@loopback/pooling](./pooling.md) ## pooling package [@loopback/pooling](https://github.com/loopbackio/loopback-next/tree/master/extensions/pooling) ## Classes <table><thead><tr><th> Class </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [PoolingService](./pooling.poolingservice.md) </td><td markdown="1"> A singleton service to maintain a pool of resources. This pool service can be bound to different keys to represent multiple pools. Each binding is a singleton so that the state stays the same for injections into multiple instances for other artifacts. </td></tr> </tbody></table> ## Functions <table><thead><tr><th> Function </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [createPooledBindingFactory(bindingAddress)](./pooling.createpooledbindingfactory.md) </td><td markdown="1"> Create a function to return a pooled binding factory </td></tr> <tr><td markdown="1"> [getPooledValue(poolingService, requestCtx)](./pooling.getpooledvalue.md) </td><td markdown="1"> Acquire a resource from the pooling service or pool </td></tr> </tbody></table> ## Interfaces <table><thead><tr><th> Interface </th><th> Description </th></tr></thead> <tbody><tr><td markdown="1"> [Poolable](./pooling.poolable.md) </td><td markdown="1"> Life cycle methods that a poolable resource can optionally implement so that they can be triggered by the pooling service </td></tr> <tr><td markdown="1"> [PooledValue](./pooling.pooledvalue.md) </td><td markdown="1"> Pooled resource instance </td></tr> <tr><td markdown="1"> [PoolFactory](./pooling.poolfactory.md) </td><td markdown="1"> Factory for the pooling service </td></tr> <tr><td markdown="1"> [PoolingServiceOptions](./pooling.poolingserviceoptions.md) </td><td markdown="1"> Options to configure a resource pool </td></tr> </tbody></table>