java2faas

0.3.2 verified Fri May 01 auth: no javascript abandoned

CLI tool that transpiles Java code for deployment to AWS Lambda and IBM Cloud Functions. Version 0.3.2. It converts a local Java project into deployable artifacts (with Maven support) for two cloud providers simultaneously. Differentiated by handling both Amazon and IBM from a single source, automatically generating deployment scripts. Suitable for simple Java functions on Java 8. No active development since 2019.

Common errors

error Error: Cannot find module 'java2faas' ↓

cause Package not installed or not in PATH

fix

Run 'npm i -g java2faas' or use npx: 'npx java2faas ...'

error sh: deploy.sh: No such file or directory ↓

cause java2faas did not generate the amazon/ibm directories

fix

Verify options: --path must point to project root with src/main/java structure.

error Class not found: Request/Response ↓

cause Request.java or Response.java missing correct getters/setters or no-arg constructor

fix

Ensure both classes have getter for each field, setter for each field, and a public no-argument constructor.

Warnings

gotcha Package not updated since 2019 and has low downloads; consider alternatives like CDK or Terraform for production deployments. ↓

fix Use AWS CDK or Terraform with Java runtime.

gotcha Only supports Java 8; Java 11+ features may break. ↓

fix Ensure your code targets Java 8 bytecode.

gotcha Requires Request.java and Response.java to have getters/setters; otherwise compilation fails. ↓

fix Include proper JavaBean patterns (getters, setters, no-arg constructor).

gotcha CLI options are case-sensitive and not validated; typo in --aws-role will cause silent failure. ↓

fix Double-check option spelling: --aws-role (not --awsRole).

Install

npm install java2faas

yarn add java2faas

pnpm add java2faas

Imports

java2faas

wrong

const java2faas = require('java2faas')

correct

import { java2faas } from 'java2faas'

ESM module; use import syntax. No default export.

CLI
wrong
```
import CLI from 'java2faas'
```
correct
```
import { CLI } from 'java2faas/cli'
```
CLI functionality is in subpath export; use full path.

Transpiler

wrong

import { transPiler } from 'java2faas'

correct

import { Transpiler } from 'java2faas'

Case-sensitive: 'Transpiler' with capital T.

Quickstart

Install globally and run from terminal to transpile a Java project into deployable artifacts for AWS Lambda and IBM Cloud Functions.

npm i -g java2faas@0.3.2
java2faas --path . --name myFunction --entry-file src/main/java/Hello.java --entry-method hello --aws-role arn:aws:iam::123456789012:role/lambda-role