Cafienne Engine for CMMN 1.1

Cafienne hosts an open source Case Management Engine which natively executes the CMMN 1.1 standard. The engine is written in Java and Scala co-operated with the Akka toolkit, backed by Cassandra and Postgres. This technical foundation makes it a platform for building highly concurrent, distributed, and resilient message-driven case management applications.

1. Introduction

The suite comprises several components, namely;

  1. A multi-tenant service hosting among others a CMMN interpreter
  2. The Cafienne IDE, for creating models that are interpreted by the engine
  3. A basic User Interface that can help in running and debugging models

In this readme we limit to the installation of a working case engine. After you installed the case engine we advise you to follow the Getting Started wiki.

1.1 Installation

Currently we develop and work with the Case Service on Mac OS X and Windows. Cassandra and Postgres configuration is the most comprehensive part of the installation. We assume you know how to install Java, Scala and sbt, etc.

1.1.1 Prerequisites

  1. OpenJDK 11
  2. Apache Cassandra 3.x
  3. Postgres 12.x
  4. Scala 2.13 (
  5. SBT build tool >= 1.3

1.1.2 Case Service Installation

After you successfully installed Cassandra and Postgres you are ready for the Case Service installation. Run the Case Service from IntelliJ

  1. If you want to run Case Service from IntelliJ you have to checkout the sources directly from IntelliJ and create a new project based on these sources:
  1. In the Run Configuration change the VM options to:
-Dfile.encoding=UTF-8 -Dconfig.file=local.conf
-XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled
  1. Run Case Service:

Run Main.scala:

case-service/src/main/scala/org/cafienne/service/Main.scala Run Case Service from the console

  1. clone Case Service from github
$ git clone
  1. Build the Case Service sources (this will generate a zip containing the engine)
$ cd ./cafienne
$ sbt universal:packageBin
  1. Copy and unpack the generated zip
$ cp case-service/target/universal/ ~
$ cd ~ && unzip ~/
  1. Run the Case Service:
$ cd ~/cafienne/bin
$ ./case-service (or case-service.bat on Windows) Run as a Docker image

Checkout the Getting Started repository.

1.2 FAQ

1.2.1 I get a log4J timeout error, what to do? Answer: Increase the timeout setting which is 5 seconds by default. Go to local.conf or application.conf and add the following setting which you can find below the loggers entry.

logger-startup-timeout = 10s

1.3 Contribution Process

This project uses the C4 process for all code changes. "Everyone, without distinction or discrimination, SHALL have an equal right to become a Contributor under the terms of this contract."

1.4 Getting started

After you installed the Case Service you are ready to start building and running your first demo CMMN Case Model. You can read the Getting Started wiki to learn how to use the Case Service.

1.5 Dual License

Free use of this software is granted under the terms of the GNU Affero General Public License version 3. For details see the file LICENSE included with the distribution.

Commercial use is covered by the Batav Cafienne SLA.

All the documentation is covered by the CC0 license (do whatever you want with it - public domain).


To the extent possible under law, Cafienne B.V. has waived all copyright and related or neighboring rights to this work.