imesh / openwhisk-runtime-ballerina

Apache OpenWhisk runtime for Ballerina

Apache OpenWhisk Runtime for Ballerina

This repository contains the Ballerina runtime extension for Apache OpenWhisk serverless platform.

Prerequisites

The following prerequisites are needed to try this out:

• Vagrant >= v2.0.1
• OpenWhisk
• OpenWhisk CLI
• Golang >= v1.9.2 (if requires to build the Docker image)

Quick Start Guide

1. Install OpenWhisk using Vagrant:

   # Clone OpenWhisk git repository
   git clone --depth=1 https://github.com/apache/incubator-openwhisk.git openwhisk
   
   # Switch the directory to tools/vagrant
   cd openwhisk/tools/vagrant
   
   # Start OpenWhisk instance
   vagrant up

2. Install OpenWhisk CLI by following it's installation guide: https://github.com/apache/incubator-openwhisk-cli

3. Create a Ballerina function file with the following content and name it as hello-function.bal:

   import ballerina.io;
   
   function main (string[] args) {
      var output = { "hello": "world!" };
      io:println(output);
   }
   

4. Create an OpenWhisk action for the above Ballerina function using the OpenWhisk CLI:

   wsk action create hello-function hello-function.bal --docker imesh/ballerina-action

5. Invoke the hello-function using the OpenWhisk CLI:

   wsk action invoke hello-function --result
   {
       "hello": "world!"
   }