Questions tagged [complex-event-processing]

Complex event processing (CEP) consists of processing many events happening across all the layers of an organization, identifying the most meaningful events within the event cloud, analyzing their impact, and taking subsequent action in real time.

Complex event processing refers to process states, the changes of state exceeding a defined threshold of level, time, or value increment or just of a count as the event. It requires the respective event monitoring, event reporting, event recording and event filtering. An event may be observed as a change of state with any physical or logical or otherwise discriminated condition of and in a technical or economical system, each state information with an attached time stamp defining the order of occurrence and a topology mark defining the location of occurrence.

664 questions
0
votes
1 answer

wso2:cep:Executing Time Window queries on Siddhi Engine

I am currently using a Java servlet which has the siddhi core,api and query jar libraries. I am using the SiddhiManager Class to create streams,queries and callbacks. The servlet allows me to run regular queries but doesn't query time window based…
0
votes
0 answers

How does the Oracle CEP turn a command into Event?

Take an INSERT command for example, when I insert something into a table, how can the Oracle CEP know what I have done? I have read the document about the Oracle CEP, but it's too brief. I know only that event is represented as POJO in Oracle. Does…
laxus
  • 153
  • 1
  • 11
0
votes
2 answers

Why do all events come in bulk rather than one by one?

I'm testing a very simple CEP query with an externally timed window. The query is define stream LoginEvents (timeStamp long, ip string, phone string); @info(name = 'query1') from LoginEvents#window.externalTime(timeStamp,5 sec) select timeStamp, ip …
Johnny
  • 7,073
  • 9
  • 46
  • 72
0
votes
1 answer

Fiware's CEP and arrays within JSON objects

I'm trying to integrate CEP with a mailing service (Mandrill) that has specific requisits in terms of how variables are structured within the JSON object that is sent through http, requiring a complex structure. I've read that Fiware's CEP only…
A. Vieira
  • 1,213
  • 2
  • 11
  • 27
0
votes
1 answer

Does Microsoft StreamInsight support for C++?

I have used Microsoft StreamInsight in C#. Does Microsoft StreamInsight also support for C++?
NinjaV
  • 127
  • 1
  • 10
0
votes
2 answers

Esper - rule fires twice

I need some help concerning the CEP engine Esper: I wrote the following statement: SELECT clientID FROM MovementEvent.win:time_batch(5 sec) GROUP BY clientID And then I sent a MovementEvent into the engine. after 5 seconds, the subscriber is…
0
votes
1 answer

Method to convert android logs to events

How to convert android logs to events in order to do complex event processing? Please suggest hints or methods.
lajsan
  • 11
  • 3
0
votes
2 answers

StreamInsight and long running queries

I have an application built on top of StreamInsight 1.2 that has several standing queries running some calculations in User Defined Operators. Occasionally one of the calculations will take a relatively long time to complete (a few seconds), and I'm…
fred
  • 131
  • 10
0
votes
1 answer

WSO2 CEP SIDDHI LANGUAGE boolean type

Is there an allowed boolean type to be used in siddhi query language when defining streams ? By looking at the language model of Siddhi versión 310 "https://docs.wso2.com/display/CEP310/Language+Model" it looks like there is no support for stream…
0
votes
2 answers

Drools fusion not firing rules in the case of new event

I am working on drools fusion 6.2 final and want to fire rules in the case of new event in stream mode. But rules are not getting fired at its own. My rules file content is as follows: //created on: May 8, 2015 package com.test import…
0
votes
1 answer

Oracle CEP Tools Eclipse plugin - missing requirements

Does anyone have experiences with the "Oracle CEP Tools" plugin for Eclipse? I tried to install it but I get an error due to some missing requirements (see below). Can someone help me? Thanx Cannot complete the install because one or more required…
0
votes
1 answer

How to cluster the CEP rule engine in Drools 6.2.0.Final

My system is using Drools to do transaction control,the number of transactions every day will be very large. The engine event processing mode is "Stream",and I have almost 100 rules,most of them usually need to use Accumulate() & Sliding Time…
0
votes
1 answer

End of File detection in ESPER

I am using ESPER to read events from a CSV file. How can I make the query output something when reading a CSV file is finished. For example i want to output every 30 min or at the end of the file SELECT id FROM stream output every 30 min or [ EOF…
Ali Masri
  • 67
  • 1
  • 11
0
votes
1 answer

Esper filter events by pattern

I try select some events from flow through match_recognize function and receive error message. I can't understand why my pattern not work or I something miss in my statement. Maybe somebody can help me with my statement. I have EPL Statement: create…
hubba900
  • 3
  • 1
0
votes
1 answer

Complext event structure in FIWARE Generic Enabler CEP - Proton

I'd like to use Proton as CEP GE in my FI-WARE architecture. I ask your help because I have an event that has a complex structure and I would like to understand how can I define it and the EPA that should use it. I check in documents you provide in…
Lorenzo Eccher
  • 301
  • 2
  • 4