scripts

README

Scripts PoC - Moving from legacy system to new legacy

Working on Legacy Systems

Sometimes we need somthing very simple

Why?

Imagine you have a system that is 20 years old, built on technologies that nobody wants to work with anymore. For instance, there's a need to enhance a CRM by adding new features, parsers, etc. This "proof of concept" system allows any program to be called over HTTP through MQ (nats.io), thereby enabling the transition of programming tasks from the "legacy system" to modern languages and contemporary technologies.

Simple example

Get JSON from bash.json subcriber

curl -X GET -s localhost:8088/mq?t=bash.json  |jq

How to start

edit list.txt in format (add empty line at the end):

containername:mq.topic.here:script_from_scripts_dir.sh

run bash gen.sh to generate docker-compose.yml file

start system:

docker-compose up -d --build

execute script:

echo "hello world" | docker-compose exec -T cmd /app hello.world

should return something like:

got message: hello world

other

and... pipelines:

echo "input" | docker-compose exec -T cmd /app hello.world 2>&1 | docker-compose exec -T cmd /app pipe2

should return something like:

got message with 1st message: got message: input

via http to nats proxy:

curl --data "hello my script" -X POST localhost:8088/mq?t=hello.world