Stack Overflow
Stack Overflow

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
2
votes
1 answer

Count and Time window in Esper EPL

I have the following use case, which I'm trying to write in EPL, without success. I'm generating analytics events of different types, generated in different intervals (1min, 5min, 10min, ...). In special kind of analytics, I need to collect 4…
feci
  • 127
  • 6
2
votes
2 answers

Sliding window on Drools Fusion rules

I'm making an application where data from a Virtual Machine that relate to CPU usage, memory usage, disk utilization, etc. are collected via an interval HTTP request every 5 seconds. The data gathered look like this: timeStamp (long):…
csymvoul
  • 677
  • 3
  • 15
  • 30
2
votes
1 answer

Syntax error in SiddhiQL, no viable alternative at input

Using siddhi-io-rabbitmq with a java library. I tried to set the rabbitmq property "app.id" on the "@sink()", but the following error message appears: Syntax error in SiddhiQL, no viable alternative at input '; @sink(type =rabbitmq, uri =…
pedrualves
  • 93
  • 9
2
votes
1 answer

Perseo fe docker instance fail to start

I am facing with the following issue: I am trying to deploy FIWARE-Perseo to my Centos 7 server as docker instances. Although the perseocore instance runs without a problem, it doesn't happen the same with the perseo front end. It is created but…
Anastasios Oikonomidis
  • 77
  • 1
  • 9
2
votes
2 answers

FiWARE: Detecting when a sensor is not sending data to Orion CB

I'm wondering if there is any way of detecting that a specific sensor, in a specific path, has stopped sending data to the Orion Context Broker. Then, if that happens, be able to execute some kind of alarm. I've been studying FiWARE for some months…
S. Mancini
  • 33
  • 6
2
votes
2 answers

Java NoClassDefFoundError : Apache Flink Complex Event Processing

I am trying to understand the Apache Flink CEP program to monitor rack temperatures in a data center as described by Flink Official Documentation. But when I follow the steps and create a jar using mvn clean package and tried to execute the package…
Ankit Jain
  • 48
  • 2
  • 7
2
votes
1 answer

Creating instances of Esper's epl

I am playing around with Esper, learning how to use more advanced concepts. I have a program that fires mock stock events of 3 different stocks. I currently have a module with match_recognize pattern EPL that looks like this: module…
jocund
  • 25
  • 1
  • 6
2
votes
1 answer

Visual Rules in Perseo-CEP

I have been trying to use perseo API with fiware-orion and a question came up: The Documentation (https://github.com/telefonicaid/perseo-fe/blob/master/documentation/architecture.md) talks about "Visual Rules": JSON rules generated by a portal…
Salvador Peñalva
  • 21
  • 1
2
votes
2 answers

Which Open source CEP shoud I choose for distributed and pipelined processing ; siddhi, Flink , Esper?

I am little bised towards siddhi cep as it has siddhi query language but it uses storm for distributed processing and WSO2 provides an web interface / dashboard to create and deploy applications . I think it will give me less independence to enhance…
Amarjit Dhillon
  • 2,718
  • 3
  • 23
  • 62
2
votes
2 answers

drools-fusion not evcting events from working memory when it should

i have the following 2 rules: rule "Backup Not Succeeded For At Least 3 Days" @ruleId(1) when Node($id : id) not ( Backup(clientId == $id, $state: state == BackupStateEnum.FINISHED) over window:time( 3d ) from…
radai
  • 23,949
  • 10
  • 71
  • 115
2
votes
0 answers

Fiware Cepheus update failure to context broker with error "Unsupported Media Type"

since using fiware cephues i follow the Document i send the configration file which is { "host":"http://localhost:8080", "in":[ { "id":"Lab.*", "type":"Lab", "isPattern": true, "attributes":[ {…
ahmad
  • 175
  • 9
2
votes
1 answer

NullPointerException in DoSAttack2 example with CEP

I'm using CEP (cep-r5.4.3-img) for the DoSAttack2.json example and when I try to make a POST like this: http://public_IP:8080/ProtonOnWebServer/rest/events with Headers = Content-Type : application/json Body = { "Name":"TrafficReport", …
pasquy73
  • 563
  • 3
  • 13
2
votes
1 answer

Handling null values with wso2 CEP

I want to update event table (RDBMS) using additional condition that one column in that is not null. Table name is MSISDNProfileDB and it's in oracle db. from incomingStream#window.length(1) select correlation_MSISDN as MSISDN, …
datahack
  • 477
  • 1
  • 11
  • 32
2
votes
2 answers

could not create constructor :: Kie Workbench

I am using Kie workbench 6.3.0 to create rules. I am trying to run rule in stream mode. I have created a project in kie-wb and created kie-base in it. We are using kie server runtime for this. This is the kmodule code generated:
Pradnya J
  • 91
  • 1
  • 7
2
votes
2 answers

What type of EC2 instance is better suitted for Wso2 CEP Standalone?

compute optimized (c3, c4) or a memory optimized (r3) instance for running a stand-alone wso2 cep server? i searched the documentation but could not find anything regarding running this server on ec2
R.Vera
  • 35
  • 6
1 2 3
…
44 45