Mozart - a BPM platform written in Elixir

Hello All. I’m the author of the BPM Elixir framework Mozart. I’ve been away from Elixir development for a while. I just had a look in Hex and see that Mozart is close to 10,000 downloads. I’m a little surprised there is that much activity. I would love to hear from anyone that is using it, especially those that have a production app using it.

Thanks. Chuck

I am pleased to announce version 0.3.0 of Mozart - an Elixir BPM platform.

The really big new feature is a DSL for defining business process applications. Elixir developers can develop BPM applications just by writing Elixir code. No external tools are required. I don’t believe this is currently possible with any other programming language.

Here is a relevant excerpt from the project readme filed:

===========================================================

Two Features Made Possible by Elixir

A Domain Specific Language (DSL) for BPM Applications

Elixir provides programmers with the ability to seemingly extend Elixir itself by creating domain specific programming idioms.

In the case of Mozart, this means that programmers can create BPM applications by using BPM specific programming constructs mixed with otherwise everyday Elixir code. Here a very simple but complete example:

defmodule MyBpmApplication do
  use Mozart.BpmProcess

  def sum(data) do
    %{sum: data.x + data.y}
  end

  defprocess "add x and y process" do
    service_task("add x and y task", function: &MyBpmApplication.sum/1, inputs: "x,y")
  end

end

This module can be used as-is to start and execute a BPM process engine as shown below. (A small quanity of system output was removed to improve clarity.)

iex > ProcessService.load_process_models(MyBpmApplication.get_processes())
iex > {:ok, ppid, uid, _key} = ProcessEntine.start_process("add x and y process", %{x: 1, y: 1})
[info] Start process instance [add x and y process][b82f5da1-6e5d-44df-b4ed-9064b877e484]

iex > ProcessEngine.execute(ppid)
[info] New service task instance [add x and y task][f396a252-fba4-4804-9fdd-360a6c24ed54]
[info] Complete service task [add x and y task[f396a252-fba4-4804-9fdd-360a6c24ed54]
[info] Process complete [add x and y process][b82f5da1-6e5d-44df-b4ed-9064b877e484]

iex > ProcessService.get_completed_process_data(uid)
%{sum: 2, y: 1, x: 1}

Conversely, with Mazart, process models are not graphically constructed using a visual programming environment typical of most of current BPM development. We believe that this kind of development is avoided by a substantial segment of the software development community and in some instances is not condusive to CI/CD developmemnt processes.

However, visual BPM modelling tools are highly regarded by business process analysts and the resulting graphical process depictions are highly readable by developers and process analysts alike. So, it was essential that the DSL developed produce process models that are as readily understood by process analysts as are BPMN2 process models. We hope you will think we have been reasonably successful achieving this goal.

We anticipate that BPMN2 tools will still be used by Mozart development teams, but only for analysis and documentation. Actual BPM process models will be created with the Mozart BPM DSL.

A Process for Each Business Process

Another distinguishing feature is that each business process model is executed in a separate Elixir process (GenServer) instance. This is possible due to Elixir’s (and Erlang’s) unique capacity for highly performant, fault tolerant and massively concurrent multi-processing.

The goal is extremely fast and relable business process model execution. We will be publishing performance metics in the near future to gage Mozart’s performance charateristics. Initial results look very promising.

===========================================================

Any feedback will be appreciated.

Announcing the release of Mozart 1.0.0.

New:

• Process notes can be added to processes.
• Promotion to version 1.0.0

Current State:

1. Mozart is now feature complete, at least minimally.
2. Development priority will be given to new GitHub reported issues.
3. Opera - Mozart POC GUI has been updated with additional sample BPM models.

It’s time for me to start looking for Elixir development work. Please let me know if you know of a position I might be suited for. Either permanent or contract is fine. The location either needs to be the Kansas City metro or remote.

Go Chiefs!!