Esper_(software) | |
Developer: | EsperTech Inc. |
Latest Release Version: | check website |
Operating System: | Cross-platform |
Programming Language: | Java, C# |
Genre: | Complex Event Processing |
License: | GPL v2 |
Esper is an open-source Java-based software product for Complex event processing (CEP) and Event stream processing (ESP), that analyzes series of events for deriving conclusions from them.
Esper extends the SQL-92 standard for its engine and enterprise framework, providing Aggregate function, Pattern matching, event windowing and joining. Esper implements Event-driven programming and event-driven architecture.
Esper was created in 2006 by EsperTech Inc. It offers a Domain-specific language for processing events called Event Processing Language (EPL). EPL is a Declarative programming language for analyzing time-based event data and detecting situations as they occur.
Esper is a Java-based application but has been ported to the C# programming language and is available for the .NET Framework under the name NEsper.
EsperTech Inc. provides Esper Enterprise Edition[1] with enterprise-ability features.
This example[2] illustrates a simple EPL query that outputs a row immediately when within a sliding window of 3 minutes the number of order events reaches 5 or more events.