Org.openwms
Open Warehouse Management System
Install / Use
/learn @openwms/Org.openwmsREADME
OpenWMS.org
Is a free to use and extensible Warehouse Management System (WMS) with a Material Flow Control (MFC) system for automatic and manual warehouses.
Find further documentation in the Wiki
Architecture
Instead of applying a technical layered architecture (like with previous technologies), the current architecture focuses on business components. Business functions with a high cohesion are kept together as small deployable software components. Each component has its own development lifecycle with its own roadmap of the API evolution and a separate data store. The following sketch shows all currently existing components of the OpenWMS.org system together with all potential surrounding systems.
![Architecture][1]
Beside the user interface, several other systems interact with the OpenWMS.org system. ERP systems on top are sending high-level tasks
to OpenWMS.org, e.g. a customer orders with order lines that refer to products managed by the Inventory Service.
OpenWMS.org fulfills these tasks by orchestrating the underlying subsystems. The communication between OpenWMS.org and an ERP system might
be in both directions, OpenWMS.org although sends status messages back to the ERP or might request product catalog updates, depending on the
project needs. On the bottom of the above graphic the system if connected to devices that are close to actors and sensors in automatic
warehouses. Those devices are almost limited in hardware resources and protocol stacks. Typical PLC
(Programmable Logic Controllers) are used to interact with field sensors and to control actors. OpenWMS.org is an open source software and
therefore promotes the usage of open source hardware components over commercial PLC products. The first choice of supported devices
are boards, like Raspberry Pi or industrial Revolution Pi, with an open
microcontroller architecture. But nevertheless also closed proprietary systems are supported as well. All this kind of subsystems have one
thing in common: They are close to the hardware and expect response times in the range of milliseconds to control motors and switch gates
very quickly. They have the power to bring down a serving component down just by repeating requests all the time. Typical web application
clients are different in that the infrastructure takes care of DoS attacks, and the application server pools incoming traffic.
Read more about each components architecture and design on the components corresponding GitHub page.
Technologies
In addition to a bunch of Spring Framework subprojects, OpenWMS.org supports popular BPMN workflow engines like Activiti, Flowable and Camunda to take routing decisions on the transport layer. RDBMS access is most often realised with the Jakarta Persistence API. Some components might also use NoSQL databases, like MongoDB. RabbitMQ in combination with the Spring Integration project is used as an event broker for asynchronous event and command propagation. Currently, all microservices are realised as Spring Boot applications designed to run on any modern PaaS cloud platforms, like the Azure Kubernetes Service, AWS EKS or Redhat OpenShift.
Microservices
Due to OpenWMS.org is built on a modern distributed microservice architecture that follows the Twelve-Factor methodology, all functional business components are managed within their own SDLC (Software Development Life Cycle) and own source code repositories.
| Service Name | Repository | Accessibility | License | Version |
|----------------------------|-----------------------------------------------------------------------------------------------|-----------------|------------|-----------------------------------------------------------------------------------------------|
| Service Registry | org.openwms.services | Public | Apache-2.0 | 
