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Follow AWS Lambda handler resolution for nodejs. #204

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Follow AWS Lambda handler resolution for nodejs. #204

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16 changes: 12 additions & 4 deletions nodejs/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,11 +32,17 @@ function getHandlerPath() {
)
}

const handlerToWrap = parts[parts.length - 1]
const moduleToImport = handler.slice(0, handler.lastIndexOf('.'))
const handlerToWrap = parts.slice(1).join('.')
const moduleToImport = handler.slice(0, handler.indexOf('.'))
return { moduleToImport, handlerToWrap }
}

function resolveHandler(object, nestedProperty) {
return nestedProperty.split('.').reduce((nested, key) => {
return nested && nested[key]
}, object)
}

function handleRequireImportError(e, moduleToImport) {
if (e.code === 'MODULE_NOT_FOUND') {
return new Error(`Unable to import module '${moduleToImport}'`)
Expand Down Expand Up @@ -117,14 +123,16 @@ if (process.env.NEW_RELIC_USE_ESM === 'true') {
}

async function getHandler() {
const userHandler = (await getModuleWithImport(LAMBDA_TASK_ROOT, moduleToImport))[handlerToWrap]
const userApp = await getModuleWithImport(LAMBDA_TASK_ROOT, moduleToImport)
const userHandler = resolveHandler(userApp, handlerToWrap)
validateHandlerDefinition(userHandler, handlerToWrap, moduleToImport)

return userHandler
}

function getHandlerSync() {
const userHandler = getModuleWithRequire(LAMBDA_TASK_ROOT, moduleToImport)[handlerToWrap]
const userApp = getModuleWithRequire(LAMBDA_TASK_ROOT, moduleToImport)
const userHandler = resolveHandler(userApp, handlerToWrap)
validateHandlerDefinition(userHandler, handlerToWrap, moduleToImport)

return userHandler
Expand Down