|
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〔(【引用サイトリンク】url=http://www.espertech.com/products )〕 with enterprise-ability features. ==Example== This example 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. select count( *) from OrderEvent.win:time(3 min) having count( *) >= 5 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Esper (software)」の詳細全文を読む スポンサード リンク
|