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Zenaton examples for Ruby

This repository contains examples of workflows built with Zenaton. These examples illustrates how Zenaton orchestrates tasks that are executed on different workers.

Installation

Download this repo

git clone https://github.com/zenaton/examples-ruby.git; cd examples-ruby

then add an .env file

cp .env.example .env

and populate it with your application id and api token found here.

Running on Docker

Simply run

docker-compose build; docker-compose up

You're all set!

Running Locally

Install dependencies

bundle install

Then, you need to install a Zenaton worker

curl https://install.zenaton.com | sh

and start it, and make it listen to your configuration:

zenaton start; zenaton listen --env=.env --boot=boot.rb

Your all set!

Your workflows will be processed by your worker, so you won't see anything except the stdout and stderr, respectively zenaton.out and zenaton.err. Look at these files :)

Example 1 : Single task execution

This example showcases

• An execution of a single task

ruby launch_single_task.rb

Example 2 : Sequential tasks execution

This example showcases

• a sequential execution of three tasks. The second and third tasks are executed only when the previous one is processed.
• In a sequential task execution, you can get the output of a task. The result of a task can be used by the next one.

ruby launch_sequential.rb

Example 3: Parallel tasks execution

This example showcases

• a parallel execution of 2 tasks
• a third task that is executed only after both first two tasks were processed

ruby launch_parallel.rb

Example 4: Asynchronous tasks execution

this example showcases

• Asynchronous executions of Task A and Task B (fire and forget)
• Then sequential executions of Task C and Task D

ruby launch_asynchronous.rb

When a task is dispatched asynchronously, the workflow continues its execution without waiting for the task completion. Consequently, a task asynchronous dispatching always returns a null value.

Example 5: Event

This example showcases

• how to change a workflow's behaviour based on an external event

ruby launch_event.rb

Example 6: Wait

This example showcases

• how the provided Wait task can be used to pause the workflow for a specified duration

ruby launch_wait.rb

Example 7: Wait Event

This example showcases

• how the provided Wait task can also be used to pause the workflow up to receiving a specific external event

ruby launch_wait_event.rb

Example 8: Error Workflow

This example showcases

• how to recover from a faulty task

ruby launch_error.rb

Example 9: Recursive Workflow

This example showcases

• how launching events or workflows directly from orchestrated tasks allows you to schedule recurring workflows

ruby launch_recursive.rb

Example 10: Workflow Versions

This example showcases

• how to update your workflow implementation, even while previous versions are still running

ruby launch_version.rb

Example 11: Automatic retry of failed tasks

This example showcases

• how a failed task can be retried automatically
• how to customize the automatic retry policy

ruby launch_automatic_retry.rb

Example 12: Schedule a task

This example showcases

• how to schedule a task to make it run periodically

ruby schedule_task_a.rb