The CSP (Communicating Sequential Processes) abstraction builds on independent composable processes, which exchange messages in a synchronous manner.
GPars leverages the JCSP library developed at the University of Kent, UK.Jon Kerridge, the author of the CSP implementation in GPars, provides exhaustive examples on of GroovyCSP use at
his website:
The GroovyCSP implementation leverages JCSP, a Java-based CSP library, which is licensed under GPL. Unlike the liberal
Apache 2 license, which GPars uses, GPL is more restrictive on use in commercial software. Please make sure your application conforms to the GPL
rules before enabling use of JCSP in your code.
If the GPL license is too restrictive for your use, you might consider checking out the Dataflow Concurrency chapter of this User Guide
to learn about tasks , selectors and operators , which may help you resolve concurrency issues in ways similar to the CSP approach.
In fact the dataflow and CSP concepts stand very close to each other.
By default, without actively adding an explicit dependency on JCSP in your build file or downloading and including the JCSP jar file in your project,
the standard commercial-software-friendly Apache 2 License terms apply to your project. GPars directly only depends on software licensed under licenses
compatible with the Apache 2 License.