---
title: 'useLambdaTracer'
description: 'A hook to capture AWS Lambda tracing data'
group: 'Hooks'
---

Provides an Exobase hook that will capture tracing data in an AWS Lambda function.

Install

``sh
yarn add @exobase/use-lambda-tracer


or


yarn add @exobase/hooks
`

Import

`ts
import { useLambdaTracer } from '@exobase/use-lambda-tracer'
// or
import { useLambdaTracer } from '@exobase/hooks'
`

Usage

`ts
import type { Props } from '@exobase/core'
import exo from '@exobase/core'
import { useLambda } from '@exobase/use-lambda'
import { useLambdaTracer } from '@exobase/use-lambda-tracer'

export default exo()
.root(useLambda())
.hook(useLambdaTracer())
.endpoint(async () => {
return { message: 'traced' }
})
`

If you want to customize the tracer instance you can provide your own Tracer in the hook options.

`ts
import type { Props } from '@exobase/core'
import exo from '@exobase/core'
import { useLambda } from '@exobase/use-lambda'
import { useLambdaTracer } from '@exobase/use-lambda-tracer'

export default exo()
.root(useLambda())
.hook(
useLambdaTracer({
tracer: () => new Tracer({ serviceName: 'warehouse' }),
tracer: async props => new Tracer({ serviceName: 'warehouse' }),
tracer: new Tracer()
})
)
.endpoint(async () => {
return { message: 'traced' }
})
`

If you do use your own tracer this is a good time to compose hooks so you don't need to repeat your tracer setup.

`ts
// hooks/useLambdaTracer.ts
import * as exo from '@exobase/use-lambda-tracer'

const useLambdaTracer = () =>
exo.useLambdaTracer({
tracer: new Tracer({ serviceName: 'api' })
})
`

then, in all your endpoints import and use your own hook

`ts
import { useLambdaTracer } from './hooks/useLambdaTracer'

// ...

export default compose(
useLambda(),
useLambdaTracer()
// ...
)
``