Esper is a component for complex event processing (CEP), streaming SQL and event series analysis, available for Java as Esper, and for .NET as NEsper.

Esper's home page and documentation are at http://www.espertech.com/esper

Esper and NEsper are open-source software available under the GNU General Public License (GPL) version 2 (GPL v2).

This repository tracks changes since release 5.2.0 and as of April 6, 2015. The repository prior to that date was the Codehaus repository which has been discontinued.

Esper and NEsper including documentation are copyrighted and the copyright is owned by EsperTech Inc., unauthorized reproduction or distribution of this copyrighted work is illegal.

For commercial licensing terms, please contact EsperTech Inc. for any inquiry.

At this time Master tracks version 6.0 and up development and therefore requires Java 8.