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Questions tagged [nesper]

NEsper is a CLR-based component for building CEP and ESP engines.

NEsper is a CLR-based component for building CEP and ESP engines. NEsper is based upon the Esper baseline, but includes customizations that are specific to the .NET CLR.

See http://esper.codehaus.org/about/nesper/nesper.html

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How to remove events from stream between two other events in Nesper?

I try to remove Events between two distinct events. I've found a way to declare a dynamic context, which meets the situation in which I want to remove the events. create objectarray schema ParentEvent(Start Bool,End Bool) create objectarray schema…
Bernhard
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Connection Nesper to external database PgSQL/SQLite

I'm trying to connect Nesper to an external database (originally sqlite) but nothing is able to resolve the type. I get an exception at the configure routine "com.espertech.esper.client.EPException: 'Unable to resolve type for driver 'PgSQL''" Seems…
huxley
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NEsper/Esper EPL event statement

Can anyone help me define the EPL statement to catch the event when the following situation occurs: Assumming that there are events with 3 attributes - (string)Symbol, (boolean)Value, (datetime)Timestamp. If the events have the same Symbol and have…
Narsu
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Import events(datas) in NEsper engine

can anyone tell me how to import the events(datas) in NEsper engine to analyse whether pattern is catched or not? I've already set and defined the pattern I want to catch and the event types(event class) and configured the runtime engine. Now I want…
Narsu
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Esper / NEsper EPL statement

I'm trying to define NEsper EPL event statement for the following situation. I have 3 events - for example apple, banana and orange. They all have attributes - (bool) eatable, (datetime) timestamp. I want to catch the pattern, if more than one…
Narsu
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Esper/Nesper runtime configuration add generic event type

can anyone tell me how to add generic type (bean) to configure the CEP runtime? I'm in NEsper environment using C#., I have an event(bean) - Signal which has the attribute - value. Depends on what kind of Signal it is, the value can be bool or…
Narsu
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Esper/NEsper EPL event Statement

I'm new in Esper. Can anyone help me define the EPL statement to catch the event when the following situation occurs: Assumming that there are events with 3 attributes - (string)Symbol, (boolean)Value, (datetime)Timestamp. For example event1…
Narsu
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Esper / NEsper EPL event statement

I'm pretty new in NEsper/Esper. I want to catch the event when two event occur less than 3 seconds, in other words when the timestamp difference between two events is smaller than 3 seconds. How can I define the EPL statement? For example, the event…
Narsu
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Nesper example add assembly reference - namespace com / Support / UpdateEventArgs /

I'm trying to understand how NEsper works and see the example codes like Feed, ATM, AutoId, Transaction and so on. when I try to build the solution, I get many errors. the type or namespace com / Support / UpdateEventArgs / ... could not be found.…
Narsu
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Running Esper in ARM Cortex-M4

Is it possible to run Esper CEP in an LPC4088 microcontroller with a 120 MHz ARM Cortex-M4 core? I wonder if it is possible to it under JVM or using Nesper for .NET.
user2886614
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How do I find the C# Documentation for Nesper?

I already read the Java documentation. Unfortunately the Java API and C# API are quite different. I am trying to implement a CSV-Adapter for the Nesper CEP Framework. Thanks in advance!
Ensar Ensar
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How to set Object-array default event representation

I'm facing an error while I change the default event representation to Object array in this way: Configuration configuration = new…
Pablog1108
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Esper - concatenate values from multiple rows to a list

I have an Esper query that returns multiple rows, but I'd like to instead get one row, where that row has a list (or concatenated string) of all of the values from the (corresponding columns of the) matching rows that my current query returns. For…
UnknownBeef
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Using NEsper to read LogFiles for reporting purposes

We are evaluating NEsper. Our focus is to monitor data quality in an enterprise context. In an application we are going to log every change on a lot of fields - for example in an "order". So we have fields like Consignee name Consignee…
Holger
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How to properly create a threshold alert statements in Esper

I'm trying to create a set of EPL statements that allow the engine to alert when a value is or not over a threshold. Another way to understand it is like a 'fence' or geographical fence. The set of statements must alert when a value enters or…
Pablog1108
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