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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.

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How does Esper match events with the appropriate queries

I am using ESPER for streaming event processing. I am creating Statements and then adding them to the CEP Engine as follows. Is this the right approach for processing large quantities(million events per minute) of data? Configuration cepConfig =…
RagHaven
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Esper: EPL "select" failed du to a validation error

I'm trying to run a simple Test with Esper (Chapter 14, http://dl.e-book-free.com/2013/07/activiti_in_action.pdf). The code is pretty simple: public class EventLengthWindowTest { public class LoanRequestEvent { public int amount =2; …
KayJ
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Esper: "time_order" seems not working

I'm using Esper (the event processing engine), the EPL query is: select * from Event.ext:time_order(timestamp_event, 10000 minutes) where duration > 10 But the output is not ordered by "timestamp_event": id int = 1, timestamp_event= 1412686800000,…
paolo789
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WSO2 CEP custom function doesn't work as aggregate function

WSO2 CEP custom function doesn't work as aggregate function, instead it operates on each row of data. Lets say we have value1 and value2 in input stream. host:A, Value1:1, value2:10 host:A, Value1:2, value2:20 host:A, Value1:3, value2:30 host:A,…
Anshul Gupta
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ESPER. send data with min value

I put data into Esper with a type: {"symbol" :string "price" :double} I want to have a symbol of a min price from every minute. When I do something like that: select min(price), symbol from Market.win:time_batch(60 sec) I get a lot of events…
jadb
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WSO2 CEP thrift ip address not bound to eth0/sitelocal ip address of linux machine

Standalone mode When I start WSO2 CEP server on my linux machine, the ip address which is displayed in the logs as below Mgt Console URL : https://<172.16.55.1>:9443/carbon/ When I run netstat on that port, as…
Anshul Gupta
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What is the best way to transfer data between CEP engine and stream data generator with in LAN?

I'm new to Complex event processing(CEP) systems, using one of the CEP engine called Esper to detect event patterns in smart buildings. Different sensors assumed and implemented data generators for them. I would like to measure performance of my…
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Finding a start and stop value when a value increases more than 100 times in ESPER

Im having trouble in ESPER. I have a simulated stock file which conatins a lot of info. I want to fnd all the start and stop dates when the weighted price of the BTC stock increases more than 100 times. This is how the files looks. These are BTC…
eternalStud
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Complex Event Processing

I've recently been looking into event based systems and learned about Complex Event Processing using frameworks such as Apache Storm. I understand that CEP is ideal when you are dealing with large streams of data and you would like to detect certain…
RagHaven
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WSO2 CEP Can't access dashboard

I've installed wso2 cep tool in a private cloud, hence I've a public ip address that is NATted to an internal ip address. When I try to access to cep dashboard from the web console this one hangs because the web application redirects the browser to…
user2523783
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Creating events with nested properties using INSERT INTO in Esper

I have defined a XML-based event type PositionUpdate in Esper with nested properties as below.
M.Hebot
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Looking for an example of drools bassd rule for sequence of events

I tried a few different formats but I'm interested in finding matches for when event of A follows B and the next set within the sequence doesn't begin until the previous sequence ends
user3964516
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WSO2 CEP Execution Plan Error

I'm just starting testing WSO2 CEP. I'm using version 3.1.0. I've done a first successful test with a single attribute event and a very simple query. But no, I've tried to make the test a bit more realistic, and added more attributes to my events,…
Ephéméris Lappis
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WSO2 ESB with CEP doesn't work

I'm using WSO2 ESB v.4.8.1 and WSO2 CEP v.3.1.0 and I want to integrate each other. The problem is that I fill IP Address, protocol, disable security connection, Authentication Port set 7711, Receiver Port set on 7611 and when event come to ESB in…
Kacu
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WSO2 CEP 3.1.0 - How to create custom jms event adaptor?

I have a question about WSO2 CEP 3.1.0. Please advice for my question. There is jms event adaptor for activemq in WSO2 CEP 3.1.0 as defult. But I need custom event adaptor for message broker such as rabbitmq except for activemq. So I want to create…
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