Siddhi under Apache License V2, and its a product designed for real time processing both in standalone mode and in distributed mode.
Siddhi is basically a Java library that's embedded in WSO2 CEP server to provide enterprise integration for Complex Event Processing.
Since Siddhi is just a java library here are some samples demonstrating siddhi’s capabilities as a library.
You can find the WSO2 CEP product from:
You can find the Siddhi source code from:
You can find the Documentation for WSO2 CEP from:
You can find the Documentation for Siddhi Language Specification from:
You can find the Siddhi Library Sample from: