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LambdaServer

@webda/aws

Class: LambdaServer<T>

Defined in: aws/src/services/lambdaserver.service.ts:84

The Lambda entrypoint for Webda

This take the input coming from the API Gateway to transform it and analyse it with Webda Once execution is done, it will format the result in a way that the API Gateway will output the result

Other AWS events are dispatched to the services implementing AWSEventsHandler

Webda Modda​

Extends​

  • Service<T>

Type Parameters​

T​

T extends LambdaServerParameters = LambdaServerParameters

Constructors​

Constructor​

new LambdaServer<T>(name, params): LambdaServer<T>

Defined in: core/lib/services/service.d.ts:72

Service

Parameters​

name​

string

The name of the service

params​

T

The parameters block define in the configuration file

Returns​

LambdaServer<T>

Inherited from​

Service<T>.constructor

Properties​

_awsEventsHandlers​

_awsEventsHandlers: AWSEventsHandler[] = []

Defined in: aws/src/services/lambdaserver.service.ts:88

Handlers registered manually

_compiledCapabilities​

protected _compiledCapabilities: Record<string, any>

Defined in: core/lib/services/iservice.d.ts:39

Capabilities detected at compile-time from @WebdaCapability-tagged interfaces.

Populated during Service.resolve by reading the service's entry in webda.module.json. Each key is a capability name (e.g., "request-filter"), and the value is an empty object {} by default. Override getCapabilities to provide capability-specific configuration or to conditionally disable capabilities.

See​

getCapabilities

Inherited from​

Service._compiledCapabilities

[WEBDA_EVENTS]​

[WEBDA_EVENTS]: object

Defined in: core/lib/services/service.d.ts:50

Set the Webda events here

Inherited from​

Service.[WEBDA_EVENTS]

logger​

protected logger: Logger

Defined in: core/lib/services/service.d.ts:59

Logger with class context

Inherited from​

Service.logger

metrics?​

protected optional metrics?: object

Defined in: core/lib/services/service.d.ts:63

Get metrics

Inherited from​

Service.metrics

name​

readonly name: string

Defined in: core/lib/services/iservice.d.ts:19

Inherited from​

Service.name

parameters​

readonly parameters: T

Defined in: core/lib/services/iservice.d.ts:20

Inherited from​

Service.parameters

createConfiguration?​

static optional createConfiguration?: (params) => any

Defined in: core/lib/services/iservice.d.ts:24

Create configuration set by the application on load

Parameters​

params​

any

Returns​

any

Inherited from​

Service.createConfiguration

filterConfiguration?​

static optional filterConfiguration?: (params) => any

Defined in: core/lib/services/iservice.d.ts:28

Create configuration set by the application on load

Parameters​

params​

any

Returns​

any

Inherited from​

Service.filterConfiguration

Parameters​

static Parameters: typeof ServiceParameters

Defined in: core/lib/services/service.d.ts:46

Service parameters

Inherited from​

Service.Parameters

Methods​

__clean()​

abstract __clean(): Promise<void>

Defined in: core/lib/services/service.d.ts:215

Clean the service data, can only be used in test mode

Returns​

Promise<void>

Inherited from​

Service.__clean

addListener()​

addListener<Key>(eventName, listener): this

Defined in: core/lib/events/asynceventemitter.d.ts:80

Type Parameters​

Key​

Key extends never

Parameters​

eventName​

Key

the event name

listener​

(event) => void | Promise<void>

the event listener

Returns​

this

this for chaining

See​

EventEmitter.addListener

Inherited from​

Service.addListener

addRoute()​

protected addRoute(url, methods, executer, openapi?, override?): void

Defined in: core/lib/services/service.d.ts:177

Add a route dynamicaly

Parameters​

url​

string

of the route can contains dynamic part like {uuid}

methods​

HttpMethodType[]

the HTTP methods

executer​

Function

Method to execute for this route

openapi?​

OpenAPIWebdaDefinition

the OpenAPI specification

override?​

boolean

whether to override existing

Returns​

void

Inherited from​

Service.addRoute

authorizeClientEvent()​

authorizeClientEvent(_event, _context): boolean

Defined in: core/lib/services/service.d.ts:153

Authorize a public event subscription

Parameters​

_event​

string

the event name

_context​

OperationContext

the execution context

Returns​

boolean

true if the condition is met

Inherited from​

Service.authorizeClientEvent

computeParameters()​

computeParameters(): void

Defined in: core/lib/services/service.d.ts:77

Used to compute or derivate input parameter to attribute

Returns​

void

Deprecated​

Inherited from​

Service.computeParameters

computePrefix()​

computePrefix(event, httpContext): void

Defined in: aws/src/services/lambdaserver.service.ts:328

Based on API Gateway event set the prefix on the http context if any

Parameters​

event​

any

the API Gateway event

httpContext​

HttpContext

the context to update

Returns​

void

emit()​

emit<Key>(event, data): Promise<void>

Defined in: core/lib/services/service.d.ts:204

Emit the event with data and wait for Promise to finish if listener returned a Promise

Type Parameters​

Key​

Key extends never

Parameters​

event​

Key

the event name

data​

object[Key]

the data to process

Returns​

Promise<void>

Inherited from​

Service.emit

getAWSEventsHandlers()​

getAWSEventsHandlers(): AWSEventsHandler[]

Defined in: aws/src/services/lambdaserver.service.ts:106

Return all the AWS events handlers: the registered ones and the services implementing the interface

Returns​

AWSEventsHandler[]

the handlers

getCapabilities()​

getCapabilities(): Record<string, any>

Defined in: core/lib/services/iservice.d.ts:61

Return the capabilities of this service.

By default returns capabilities detected at compile-time from

Returns​

Record<string, any>

the result

Webda Capability-tagged​

interfaces in webda.module.json.

Override to disable capabilities based on configuration:

getCapabilities() {
  const caps = super.getCapabilities();
  if (!this.parameters.enabled) delete caps["request-filter"];
  return caps;
}

Inherited from​

Service.getCapabilities

getClientEvents()​

getClientEvents(): string[]

Defined in: core/lib/services/service.d.ts:144

Return the events that an external system can subscribe to

Returns​

string[]

the list of results

Inherited from​

Service.getClientEvents

getMaxListeners()​

getMaxListeners(): number

Defined in: core/lib/events/asynceventemitter.d.ts:84

Returns​

number

Inherited from​

Service.getMaxListeners

getMetric()​

getMetric<T>(type, configuration): T

Defined in: core/lib/services/service.d.ts:138

Add service name label

Type Parameters​

T​

T = Gauge<string> | Counter<string> | Histogram<string>

Parameters​

type​

CustomConstructor<T, [MetricConfiguration<T>]>

the type to look up

configuration​

MetricConfiguration<T>

the configuration

Returns​

T

the result

Inherited from​

Service.getMetric

getName()​

getName(): string

Defined in: core/lib/services/service.d.ts:209

Get service name

Returns​

string

the result string

Inherited from​

Service.getName

getOpenApiReplacements()​

getOpenApiReplacements(): any

Defined in: core/lib/services/service.d.ts:182

Return variables for replacement in openapi

Returns​

any

the result

Inherited from​

Service.getOpenApiReplacements

getOperationId()​

getOperationId(id): string

Defined in: core/lib/services/service.d.ts:167

If undefined is returned it cancel the operation registration

Parameters​

id​

string

the identifier

Returns​

string

the result

Inherited from​

Service.getOperationId

getParameters()​

getParameters(): T

Defined in: core/lib/services/service.d.ts:82

Get the service parameters

Returns​

T

the result

Inherited from​

Service.getParameters

getPrefix()​

getPrefix(event): string

Defined in: aws/src/services/lambdaserver.service.ts:310

Based on API Gateway event compute the prefix if any

Parameters​

event​

any

the API Gateway event

Returns​

string

the prefix or an empty string

getService()​

getService<T>(name): ServicesMap[T]

Defined in: core/lib/services/service.d.ts:131

Get a service by name

Type Parameters​

T​

T extends keyof ServicesMap

Parameters​

name​

T

the name to use

Returns​

ServicesMap[T]

the result map

Deprecated​

Use useService, might reconsider

Inherited from​

Service.getService

getState()​

getState(): ServiceStates

Defined in: core/lib/services/service.d.ts:55

Get the current state

Returns​

ServiceStates

the result

Inherited from​

Service.getState

getUrl()​

getUrl(url, _methods): string

Defined in: core/lib/services/service.d.ts:161

Return the full path url based on parameters

Parameters​

url​

string

relative url to service

_methods​

HttpMethodType[]

in case we need filtering (like Store)

Returns​

string

absolute url or undefined if need to skip the Route

Inherited from​

Service.getUrl

handleAWSEvents()​

handleAWSEvents(events): Promise<boolean>

Defined in: aws/src/services/lambdaserver.service.ts:139

Analyse events to try to find its type

Parameters​

events​

any

the raw event

Returns​

Promise<boolean>

true if the event was an AWS event

handleLambdaReturn()​

handleLambdaReturn(context): Promise<LambdaServerResult>

Defined in: aws/src/services/lambdaserver.service.ts:340

End the context and build the API Gateway result from it

Parameters​

context​

WebContext

the web context

Returns​

Promise<LambdaServerResult>

the API Gateway result

handleLaunch()​

protected handleLaunch(commandEvent): Promise<void>

Defined in: aws/src/services/lambdaserver.service.ts:172

Execute a launch command: call a method on a service

Parameters​

commandEvent​

LambdaCommandEvent

the command

Returns​

Promise<void>

handleRequest()​

handleRequest(sourceEvent, context): Promise<LambdaServerResult>

Defined in: aws/src/services/lambdaserver.service.ts:197

Handle a Lambda invocation

Dispatch AWS events, launch commands or API Gateway requests

Parameters​

sourceEvent​

any

the Lambda event

context​

Context

the Lambda context

Returns​

Promise<LambdaServerResult>

the API Gateway result for HTTP requests

init()​

abstract init(): Promise<LambdaServer<T>>

Defined in: core/lib/services/service.d.ts:198

Will be called after all the Services are created

Returns​

Promise<LambdaServer<T>>

Inherited from​

Service.init

initMetrics()​

initMetrics(): void

Defined in: core/lib/services/service.d.ts:124

Init the metrics

Returns​

void

Inherited from​

Service.initMetrics

initOperations()​

initOperations(): void

Defined in: core/lib/services/service.d.ts:186

Init the operations from

Returns​

void

Operation​

decorators on this service

Inherited from​

Service.initOperations

listeners()​

listeners(eventName): Function[]

Defined in: core/lib/events/asynceventemitter.d.ts:139

Get all listeners for an event

Parameters​

eventName​

never

the event name

Returns​

Function[]

the list of results

Inherited from​

Service.listeners

loadCapabilities()​

protected loadCapabilities(): void

Defined in: core/lib/services/service.d.ts:120

Load capabilities from webda.module.json metadata into _compiledCapabilities.

Called during resolve after dependency injection. Reads the service's type name from parameters, looks it up in the application's module metadata (moddas or beans section), and populates _compiledCapabilities with an empty object for each declared capability name.

Fails silently if the application is not available (e.g., in unit tests where services are instantiated without a full application context).

Returns​

void

Example​

// If webda.module.json contains:
// { "moddas": { "MyApp/HawkService": { "capabilities": ["request-filter", "cors-filter"] } } }
// Then after resolve(), this.getCapabilities() returns:
// { "request-filter": {}, "cors-filter": {} }

See​

getCapabilities

Inherited from​

Service.loadCapabilities

log()​

log(level, ...args): void

Defined in: core/lib/services/service.d.ts:226

Parameters​

level​

WorkerLogLevel

to log

args​

...any[]

additional arguments

Returns​

void

Inherited from​

Service.log

off()​

off<Key>(eventName, listener): this

Defined in: core/lib/events/asynceventemitter.d.ts:116

Type Parameters​

Key​

Key extends never

Parameters​

eventName​

Key

the event name

listener​

(event) => void

the event listener

Returns​

this

this for chaining

See​

EventEmitter.off

Inherited from​

Service.off

on()​

on<Key>(eventName, listener): this

Defined in: core/lib/events/asynceventemitter.d.ts:102

Type Parameters​

Key​

Key extends never

Parameters​

eventName​

Key

the event name

listener​

(event) => void

the event listener

Returns​

this

this for chaining

See​

EventEmitter.once

Inherited from​

Service.on

once()​

once<Key>(eventName, listener): this

Defined in: core/lib/events/asynceventemitter.d.ts:95

Type Parameters​

Key​

Key extends never

Parameters​

eventName​

Key

the event name

listener​

(event) => void

the event listener

Returns​

this

this for chaining

See​

EventEmitter.once

Inherited from​

Service.once

registerAWSEventsHandler()​

registerAWSEventsHandler(service): void

Defined in: aws/src/services/lambdaserver.service.ts:96

Register a service to handle AWS Events

Services implementing AWSEventsHandler are discovered automatically

Parameters​

service​

AWSEventsHandler

the handler

Returns​

void

removeAllListeners()​

removeAllListeners<Key>(eventName?): this

Defined in: core/lib/events/asynceventemitter.d.ts:122

Type Parameters​

Key​

Key extends never

Parameters​

eventName?​

Key

the event name

Returns​

this

this for chaining

See​

EventEmitter.removeAllListeners

Inherited from​

Service.removeAllListeners

removeListener()​

removeListener<Key>(eventName, listener): this

Defined in: core/lib/events/asynceventemitter.d.ts:109

Type Parameters​

Key​

Key extends never

Parameters​

eventName​

Key

the event name

listener​

(event) => void

the event listener

Returns​

this

this for chaining

See​

EventEmitter.removeListener

Inherited from​

Service.removeListener

resolve()​

resolve(): this

Defined in: core/lib/services/service.d.ts:98

Resolve parameters and load metadata. @Route-declared routes are scanned and registered by Router.discoverRoutes(services) from Core.init() once every service has resolved — nothing to do per-service here.

Returns​

this

the result

Inherited from​

Service.resolve

setMaxListeners()​

setMaxListeners(n): this

Defined in: core/lib/events/asynceventemitter.d.ts:88

Parameters​

n​

number

Returns​

this

Inherited from​

Service.setMaxListeners

stop()​

stop(): Promise<void>

Defined in: core/lib/services/service.d.ts:86

Shutdown the current service if action need to be taken

Returns​

Promise<void>

Inherited from​

Service.stop

toJSON()​

toJSON(): string

Defined in: core/lib/services/service.d.ts:191

Prevent service to be serialized

Returns​

string

the result

Inherited from​

Service.toJSON

toString()​

toString(): string

Defined in: core/lib/services/service.d.ts:91

Return service representation

Returns​

string

the result

Inherited from​

Service.toString