aws-lambda-invoker

lambda-invoker

Module that allows invoking a lambda function synchronously via the RequestResponse invocationType or asynchronously via the Event invocationType.

Usage

new Invoker(options)

Constructor for the class.

• options - { Object, optional } - an object to provide configuration options.
  • logger - { Object, optional } - a valid logger. If no logger is provided, no debug information or errors will be logged.

const Invoker = require('lambda-invoker');
const logger = require('./path/to/your/logger');

// no logger
const invoker = new Invoker();

// logger as option
const invoker2 = new Invoker({ logger });

invoke(functionName, payload, clientContext, cb)

Method to synchronously invoke a lambda function.

• functionName - { String, required } - the lambda function you wish to invoke.
• payload - { Object, required } - the payload you wish to send to the lambda function.
• clientContext - { Object, base64-encoded } - used to pass client-specific information to the lambda function being invoked via the context variable.
• cb - { function } - takes params err and result and is called on success or failure of invoking the lambda function. By default returns a promise that rejects on error or resolves with the result from invoking the lambda.

const Invoker = require('lambda-invoker');

const invoker = new Invoker();

// lambda handler
module.exports.handler = function(event, context, cb) {
  const clientContext = { requestId: context.awsRequestId };
  invoker.invoke('testFunctionName', { data: 'blah' }, clientContext, cb);
};

invokeAsync(functionName, payload, clientContext, cb)

Method to asynchronously invoke a lambda function.

• functionName - { String, required } - the lambda function you wish to invoke.
• payload - { Object, required } - the payload you wish to send to the lambda function.
• clientContext - { Object, base64-encoded } - used to pass client-specific information to the lambda function being invoked via the context variable.
• cb - { function } - takes params err and result and is called on success or failure of invoking the lambda function. By default returns a promise that rejects on error or resolves with the result from invoking the lambda.

const Invoker = require('lambda-invoker');

const invoker = new Invoker();

// lambda handler
module.exports.handler = function(event, context, cb) {
  const clientContext = { requestId: context.awsRequestId };
  invoker.invokeAsync('testFunctionName', { data: 'blah' }, clientContext, cb);
};