Objectives

What do we want to do today?

Jolie: An Overview

In Brief

a service-oriented programming language

"it is designed to reason effectively about the key questions of (micro)service development, including the following:

What are the APIs exposed by services?

How can these APIs be accessed?

How are APIs implemented in terms of concurrency, communication, and computation?

built on top of the JVM

Jolie: An Overview

From the Jolie docs:

"More in general, Jolie brings a structured linguistic approach to the programming of services, including constructs for access endpoints, APIs with synchronous and asynchronous operations, communications, behavioural workflows, and multiparty sessions. Additionally, Jolie embraces that service and microservice systems are often heterogeneous and interoperability should be a first-class citizen: all data in Jolie is structured as trees that can be semi-automatically (most of the time fully automatically) converted from/to different data formats (JSON, XML, etc.) and communicated over a variety of protocols (HTTP, binary protocols, etc.). Jolie is an attempt at making the first language for microservices, in the sense that it provides primitives to deal directly with the programming of common concerns regarding microservices without relying on frameworks or external libraries."

Getting Started

Installation

Jolie requires Java 11+ to run

Download the Jolie installer

https://www.jolie-lang.org/downloads.html

currently https://github.com/jolie/jolie/releases/download/v1.11.0/jolie-1.11.0.jar

Run the installer

java -jar jolie-1.11.0.jar

Getting Started

Installation

Linux/macOS/WSL Homebrew

brew install jolie

Docker

docker pull jolielang/jolie

docker run -it -v /host:/container –name CONTAINERNAME jolielang/jolie

edit files in your /host, which will appear in /container

Getting Started

Installation

Or build from source

git clone https://github.com/jolie/jolie.git

cd jolie

mvn install

binaries will be in dist folder

Then (optionally) set up Jolie for the local user

scripts/dev-setup.sh ~/bin

Getting Started

Verify

Run Jolie: jolie --version

currently returns Jolie 1.11.2 (C) 2006-2022 the Jolie developers

Getting Started

Hello World

from your favorite editor, create hello.ol

run the file with jolie hello.ol

connect to the service: http://localhost:9000/hello?name=Fred

Getting Started

Hello world

type HelloRequest {
	name:string
}

interface HelloInterface {
requestResponse:
	hello( HelloRequest )( string )
}

service HelloService {
	execution: concurrent

	inputPort HelloService {
		location: "socket://localhost:9000"
		protocol: http { format = "json" }
		interfaces: HelloInterface
	}

	main {
		hello( request )( response ) { 
			response = "Hello " + request.name
		}
	}
}

Summary

So... now what?

Credentials

Who is this guy?

Architect, Engineering Manager/Leader, "force multiplier"

http://www.newardassociates.com

http://blogs.newardassociates.com

Sr Distinguished Engineer, Capital One

Educative (http://educative.io) Author

Performance Management for Engineering Managers

Books

Developer Relations Activity Patterns (w/Woodruff, et al; APress, forthcoming)

Professional F# 2.0 (w/Erickson, et al; Wrox, 2010)

Effective Enterprise Java (Addison-Wesley, 2004)

SSCLI Essentials (w/Stutz, et al; OReilly, 2003)

Server-Based Java Programming (Manning, 2000)