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Copper Cloud Examples

Copper Cloud Examples shows you how to use the Copper Workflow Engine in a cloud native environment.

Copper provides the following features:

• Open Source (commercial support available)
• Fully automated workflow execution
• High Performance/Load
• Auto-Recovery
• Cloud Ready
• Ease of use
• Multi node deployments
• Integration into existing Java environment
• Good Operational Insight
• Easy to learn
• Small footprint

Copper doesn't feature a workflow modeler GUI. Using graphical modelers for more than 10 years I don't think that this is a real disadvantage.
Copper workflows are just plain Java files, something that any Java developer knows inside out.

A detailed description of Copper Workflow Engine can be found in the /docs folder.

Example Projects

Copper Cloud Examples shows how Copper can be used in a cloud/microservice environment. A lightweight JEE server and a PostgreSQL database are used together with docker container support.
In this setup copper-engine runs within a webapp that utilizes JPA, Pooling and Jersey REST support provided by a payara micro server.

• copper-starter project is a simple setup to test some core functionalities. It has a simplistic workflow to show the basic working of Copper.

• copper-full project provides Copper-GUI and a REST based mock-server to run more realistic tests against copper-engine.

• copper-influxdb shows how to add a time-series database to collect metrics. In this example Chronograf GUI is used to visualize the metrics.

• copper-prometheus shows how to add the prometheus time-series database to collect metrics. In this example Grafana GUI is used to visualize the metrics.

• copper-kubernetes shows Copper running on a Kubernetes cluster.

Documentation

To get an overview of Copper Engine and Copper GUI you should first read the document Copper-Cloud-Examples.pdf in the docs folder. Detailed project instructions can be found in the README files under the corresponding project dirs.

Limitations

Workflow files are already compiled and read from the classpath. Therefore, the 'on the fly compilation' feature is not available. Workflow source code in Copper-GUI is not available.

Prerequisites

A working docker installation together with docker-compose is needed for execution. For projects with Java files JDK 8 or higher is needed. All command specific instructions are for linux based systems.

Testing

You can immediately start tests from your local browser with a preconfigured test url. See also instructions in the README files in the corresponding project dir.
Log output is send to stdout.

Building Docker Images

To create customized docker images run a docker build with the Dockerfile under the corresponding project dir.

Warning

Examples in this repo are for exploration only and are NOT production ready. Especially security settings and passwords are not set for some resources.

License

All material released in this repo is licensed under the Apache 2.0 license.
You can find more information about Apache 2.0 license at https://www.apache.org/licenses/LICENSE-2.0.

Resources

More information about the copper workflow engine can be found at:
https://github.com/copper-engine
https://copper-engine.org/

The Copper PostgreSQL Tool CPT for managing Copper Engine databases can be found at https://github.com/klumw/cpt