[//]: # ( )
[//]: # (This file is automatically generated by a metapak)
[//]: # (module. Do not change it except between the)
[//]: # (content:start/end flags, your changes would)
[//]: # (be overridden.)
[//]: # ( )

@whook/aws-lambda

> Build and deploy to AWS Lambda with Whook.


[//]: # (::contents:start)

This module is aimed to help you to build and deploy your Whook server to
AWS Lambda.

You can find a complete setup with a Terraform deployment example in
this pull request.

Quick setup

Install this module:

``sh
npm i @whook/aws-lambda;
`

Add the plugin to the src/index.ts main file:

`diff

// ...

$.register(
constant('WHOOK_PLUGINS', [
...WHOOK_DEFAULT_PLUGINS,
+ '@whook/aws-lambda',
'@whook/cors',
]),
);

// ...
`

Tweak the 2 build functions in your src/build.ts main file:

`diff
import {
// (...)
- DEFAULT_INITIALIZER_PATH_MAP,
- runBuild as runBaseBuild,
- prepareBuildEnvironment as prepareBaseBuildEnvironment,
// (...)
} from '@whook/whook';
+import {
+ DEFAULT_BUILD_INITIALIZER_PATH_MAP,
+ runBuild as runBaseBuild,
+ prepareBuildEnvironment as prepareBaseBuildEnvironment,
+} from '@whook/aws-lambda';

// (...)

// The prepareBuildEnvironment create the build
// environment
export async function prepareBuildEnvironment(
$: Knifecycle = new Knifecycle(),
): Promise {
$ = await prepareEnvironment($);

// (...)

- // Usually, here you call the installed build env
- $ = await prepareBaseBuildEnvironment($);
+ // Calling the AWS specific build env
+ $ = await prepareBaseBuildEnvironment($);

// The build often need to know were initializers
// can be found to create a static build and
// remove the need to create an injector
$.register(
constant('INITIALIZER_PATH_MAP', {
// (...)
- ...DEFAULT_INITIALIZER_PATH_MAP,
+ ...DEFAULT_BUILD_INITIALIZER_PATH_MAP,
}),
);

// (...)

}
`

Declare this module types in your src/whook.d.ts type definitions:

`diff
import {
+ type WhookCompilerConfig,
type WhookBaseRouteConfig,
type WhookBaseCronConfig,
+ type WhookBaseConsumerConfig,
+ type WhookBaseTransformerConfig,
+ } from '@whook/whook';
+ import {
+ type WhookAWSLambdaBuildConfig,
+ type WhookAWSLambdaRouteConfig
+ type WhookAWSLambdaConsumerConfig,
+ type WhookAWSLambdaTransformerConfig,
+ } from '@whook/aws-lambda';

declare module 'application-services' {

// ...

export interface AppConfig
- extends WhookBaseConfigs {}
+ extends WhookBaseConfigs,
+ WhookAWSLambdaBuildConfig,
+ WhookCompilerConfig {}
}

// ...


// ...

declare module '@whook/whook' {
export interface WhookRouteConfig
extends WhookBaseRouteConfig,
+ WhookAWSLambdaRouteConfig,
WhookCORSRouteConfig {}

export interface WhookCronConfig
- extends WhookBaseCronConfig {}
+ extends WhookBaseCronConfig,
+ WhookAWSLambdaCronConfig {}
+
+ export interface WhookConsumerConfig
+ extends WhookBaseConsumerConfig,
+ WhookAWSLambdaConsumerConfig {}
+
+ export interface WhookTransformerConfig
+ extends WhookBaseTransformerConfig,
+ WhookAWSLambdaTransformerConfig {}
}

`

And add the AWS Lambda config (usually in src/config/common/config.js):

`diff
// ...
import { type AppConfig } from 'application-services';

// ...

const CONFIG: AppConfig = {
// ...
+ COMPILER_OPTIONS: {
+ externalModules: [],
+ target: '22',
+ },
};

export default CONFIG;
`

Build

To build your functions:

`sh


Build all functions

npm run build

Build only one function

npm run build -- getPing
`

Debug

You can easily test your functions builds by adding @whook/aws-lambda to your
WHOOK_PLUGINS list. It provides you some commands like the testAWSLambdaRoute
one:

`sh
npx whook testAWSLambdaRoute --name getPing
`

To get more insights when some errors happens:

`sh
DEBUG=whook npm run dev -- testAWSLambdaRoute --name getPing
``

Deployment

We recommend using Terraform to deploy your lambda
functions.

There is a complete example on how to deploy your functions
in this pull request.

[//]: # (::contents:end)

API

Functions

initWrapHandlerForConsumerLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a consumer AWS Lambda.

initWrapHandlerForCronLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with cron AWS Lambda.

initWrapHandlerForConsumerLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a consumer AWS Lambda.

initWrapHandlerForKafkaLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a kafka AWS Lambda.

initWrapHandlerForLogSubscriberLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a log subscriber AWS Lambda.

initWrapHandlerForS3Lambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a S3 AWS Lambda.

initWrapHandlerForConsumerLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a transformer AWS Lambda.

initWrapHandlerForConsumerLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a consumer AWS Lambda.

Kind: global function
Returns: Promise.<Object> - A promise of an object containing the reshaped env vars.

| Param | Type | Default | Description |
| --- | --- | --- | --- |
| services | Object | | The services the wrapper depends on |
| services.ENV | Object | | The process environment |
| services.MAIN_DEFINITION | Object | | An OpenAPI definitition for that handler |
| services.apm | Object | | An application monitoring service |
| [services.time] | Object | | An optional time service |
| [services.log] | Object | noop | An optional logging service |

initWrapHandlerForCronLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with cron AWS Lambda.

Kind: global function
Returns: Promise.<Object> - A promise of an object containing the reshaped env vars.

| Param | Type | Default | Description |
| --- | --- | --- | --- |
| services | Object | | The services the wrapper depends on |
| services.ENV | Object | | The process environment |
| services.MAIN_DEFINITION | Object | | An OpenAPI definitition for that handler |
| services.apm | Object | | An application monitoring service |
| [services.time] | Object | | An optional time service |
| [services.log] | Object | noop | An optional logging service |

initWrapHandlerForConsumerLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a consumer AWS Lambda.

Kind: global function
Returns: Promise.<Object> - A promise of an object containing the reshaped env vars.

| Param | Type | Default | Description |
| --- | --- | --- | --- |
| services | Object | | The services the wrapper depends on |
| services.MAIN_DEFINITION | Object | | An OpenAPI definitition for that handler |
| services.ENV | Object | | The process environment |
| services.DECODERS | Object | | Request body decoders available |
| services.ENCODERS | Object | | Response body encoders available |
| services.PARSED_HEADERS | Object | | A list of headers that should be parsed as JSON |
| services.PARSERS | Object | | Request body parsers available |
| services.STRINGIFIERS | Object | | Response body stringifiers available |
| services.BUFFER_LIMIT | Object | | The buffer size limit |
| services.apm | Object | | An application monitoring service |
| services.obfuscator | Object | | A service to hide sensible values |
| services.errorHandler | Object | | A service that changes any error to Whook response |
| [services.time] | Object | | An optional time service |
| [services.log] | Object | noop | An optional logging service |

initWrapHandlerForKafkaLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a kafka AWS Lambda.

Kind: global function
Returns: Promise.<Object> - A promise of an object containing the reshaped env vars.

| Param | Type | Default | Description |
| --- | --- | --- | --- |
| services | Object | | The services the wrapper depends on |
| services.ENV | Object | | The process environment |
| services.MAIN_DEFINITION | Object | | An OpenAPI definitition for that handler |
| services.apm | Object | | An application monitoring service |
| [services.time] | Object | | An optional time service |
| [services.log] | Object | noop | An optional logging service |

initWrapHandlerForLogSubscriberLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a log subscriber AWS Lambda.

Kind: global function
Returns: Promise.<Object> - A promise of an object containing the reshaped env vars.

| Param | Type | Default | Description |
| --- | --- | --- | --- |
| services | Object | | The services the wrapper depends on |
| services.ENV | Object | | The process environment |
| services.MAIN_DEFINITION | Object | | An OpenAPI definitition for that handler |
| services.apm | Object | | An application monitoring service |
| [services.time] | Object | | An optional time service |
| [services.log] | Object | noop | An optional logging service |

initWrapHandlerForS3Lambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a S3 AWS Lambda.

Kind: global function
Returns: Promise.<Object> - A promise of an object containing the reshaped env vars.

| Param | Type | Default | Description |
| --- | --- | --- | --- |
| services | Object | | The services the wrapper depends on |
| services.ENV | Object | | The process environment |
| services.MAIN_DEFINITION | Object | | An OpenAPI definitition for that handler |
| services.apm | Object | | An application monitoring service |
| [services.time] | Object | | An optional time service |
| [services.log] | Object | noop | An optional logging service |

initWrapHandlerForConsumerLambda(services) ⇒ Promise.<Object>

Wrap an handler to make it work with a transformer AWS Lambda.

Kind: global function
Returns: Promise.<Object> - A promise of an object containing the reshaped env vars.

| Param | Type | Default | Description |
| --- | --- | --- | --- |
| services | Object | | The services the wrapper depends on |
| services.ENV | Object | | The process environment |
| services.MAIN_DEFINITION | Object | | An OpenAPI definitition for that handler |
| services.apm | Object | | An application monitoring service |
| [services.time] | Object | | An optional time service |
| [services.log] | Object | noop | An optional logging service |

Authors

- Nicolas Froidure

License

MIT