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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
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WSO2 Stream Processor (SP) Error "could not initialize carbon deployment engine"

I have an issue with my web IDE. The WSO2 SP or siddhi-tooling-5.1.2 starts up as you would expect and I can open the website. However, in the console upon startup it gives this error. This is an issue as I am unable to interact with the web IDE…
Casper Andersen
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Esper Engine : Same table created again when running JUNIT test cases

I am using Esper 8.8. The following code is used to initialize SQL and register all events - EPCompiler compiler = EPCompilerProvider.getCompiler(); Configuration configuration = new Configuration(); …
Sushil
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Esper js expression declaration

I am following the example in Esper documentation to create an expression following js dialect Here's my EPL declaration expression float js:IOU(xBottom1,yBottom1, xTop1, yTop1, xBottom2, yBottom2, xTop2, yTop2) [ IOU(xBottom1,yBottom1, xTop1,…
Ahmed Awad
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Is there something like select explode in esper epl?

I have the following declarations of schemas (event types) create json schema DetectedObjects as (tracking_id int, class_id int, class_name string, confidence double, bbox_xywh int[], rois string[], lc string[], rois_oc string[]); create map…
Ahmed Awad
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Drools, CEP: Collect events that are not followed by a certain event

I'm using drools 7.29 in STREAM mode, and i would like to collect events that are not followed by a certain event. $transaction: TransactionOmDto(service_type == "CASHOUT", transfer_status == "TS", $requestId: transfer_id, $msisdn: msisdn) over…
Lazcool
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How can I work with Apache Flink to detect fraud with data taken from diferent topics from kafka?

I'm new with apache flink and I need to implement a fraud detector with fixed time. Basically what I need is to take data from 3 topics from kafka (UserAuthentication,PasswordChanged and SafeTransaction). when I get events of userAuthentication and…
Anderson Jimenez
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Real-time streaming cep system with delayed reaction

I need help for an archetecture issue. I develope a cep system based on kafka technology with java. CEP should have followed characteristics: distributed (cluster) scalable fault-tolerance CEP should make followed actions: create events from…
Maminspapin
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On-Demand Query with siddhi fails

I'm using the wso2 stream integrator in order to run my siddhi application. The operating environment is windows 10 pro. I'd like to ask you for your help about way of using Siddhi's REST API. Open a command prompt as the administrator and go to…
Light
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Drools - Store Multi Stateful Sessions

We have implemented drools engine in our platform in order to be able to evaluate rules from streams. In our use case we have a change detection stream which contains the changes of multiple entities. Rules need to be evaluated for each entity from…
valter Gomes
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Could Drools Fusion be integrated with kafka streams?

I am looking for Kafka Streams complex event processing (CEP). I did not find Kafka streams native CEP. However, I found drools fusion. I have a few questions? Could Drools Fusion be integrated with Kafka streams? What's the advantage of such…
Paul Yang
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Connecting two Esper instances running in different JVMs (client / server mode?)

I have one host running a JVM that runs an Esper service. I have another host in which I'd like to connect to the esper service running in the first JVM. I.e. I'd like to be able to do something like this: EPServiceProvider epService =…
Paul Cager
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Esper - how to build dissent "statement factory"?

using Esper engine - I find myself write lots of String SQLs, and do lots of string actions to insert query to EPStatement object. What is the best practice to build queries in more convenient way? maybe build queries not with pure strings but with…
Eya
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CEP in apache beam with flink

We are using Apache beam to process events from various sources through Flink. We are in a situation where we need to use CEP engine of Flink to define event patterns and raise alerts. I am not able to find any wrapper API in beam for this. Please…
aditya kumar
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Cumulocity CEL Check if event exists

I am trying to implement that if I send Event A it will create a new Event B if it does not exist. If Event B already exists it should update it instead. I tried making a counter that counts occurences of the event but it didnt work. Also it seems…
H4rl3q1n
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CEP for edge computing

In an IoT plataform, I need to define some rule-based behaviour, configured by domain experts through Web UIs. I have device measurments/events flowing through MQTT channels from IoT gateways to cloud, but I would prefer evaluate rules on edge…
Carmine Ingaldi
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