This document provides an overview of the Clojure workflow at TokenMill. It begins with an agenda and overview of the TokenMill workflow which involves using open source bits and pieces to solve clients' problems. It then discusses why Clojure is used, highlighting its approachability, efficiency, and support for multithreaded programming. The document lists proper tooling used including Tools-deps, IntelliJ + Cursive, GraalVM, Docker, Linux, Elasticsearch and Lucene, Apache Storm, Gitlab for CI/CD, and AWS services. It concludes with a demo of a text to date Lambda project to illustrate the workflow and tools.

1. Clojure Workflow @
Dainius Jocas
2019-05-30

2. Agenda
● About TokenMill
● TokenMill workflow
● Why Clojure?
● Demo
● Questions

4. TokenMill workflow (1)

5. TokenMill workflow (2)
Loop:
1. Open source bits and pieces that should at least vaguely resemble an
idea of a credible software engineering
2. Find clients
3. Solve the problem for (2) using (1) open source bits and pieces with
the project specific custom functionality
And, of course, not loop like 2-3-1 :-)

6. TokenMill workflow (3)

7. Why Clojure?

8. Software
The most fundamental problem in computer science is problem decomposition:
how to take a complex problem and divide it up into pieces that can be solved
independently.
(John Ousterhout, A Philosophy of Software Design)

10. The Clojure Programming Language
Clojure is a dynamic, general-purpose programming language, combining the
approachability and interactive development of a scripting language with an
efficient and robust infrastructure for multithreaded programming.
(https://clojure.org/)

11. Proper Tooling
● Tools-deps (instead of Leiningen)
● IntelliJ + Cursive (some use emacs)
● GraalVM
● Docker
● Linux
● Elasticsearch and Lucene
● Apache Storm
● Gitlab for CI/CD
● AWS (S3, Lambda, Cloudformation, etc.)
● Github for OSS

12. Demo: text2date Lambda
- Project template
(https://github.com/tokenmill/clojure-graalvm-aws-lambda-template)
- Git dependencies (not from a private repository this time)
- GraalVM native image
- AWS Lambda
- https://github.com/dainiusjocas/clojure-meetup-vilnius-2019-05-30

13. Questions

14. Thank You!