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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 to define Siddhi time window for complete current day

What is the syntax for writing Siddhi time window expression for current day only. I want to calculate number of events group by any event attribute for today's date only. I am planning to use #window.time(86400000) but assume that CEP server…
Madhup Srivastava
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How can I use VFS transport in WSO CEP 3.0?

I need write enents information into file. Can anybody show me example of output adapter for WSO2CEP 3.0?
Paul
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How Wso2CEP pick the messages in JMS

I am using wso2cep 3.0.0 and activemq5.8.0 As per CEP documents i wish to Publish events using CEP. For that i started activemq with 2 define QUEUES with the name jmsProxy for incoming message and JmsProxy for out message.I added required jars in…
Faisal
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Dynamic window creation at run time - Drools Fusion 6 / Esper

I need to achieve a dynamic sliding window of length (5) where I have incoming flight statuses from various flights coming into one stream. Based on the flight_id property from various flights - dynamic windows of length 5 have to be created at run…
user1497655
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Complex Event processing with Esper and Twitter gives twitter4j.internal.org.json.JSONException: A JSONArray text must start with '['

Hi, I m trying example from http://www.mulesoft.org/connectors/es... But it is giving following Exception . Caused by: twitter4j.internal.org.json.JSONException: A JSONArray text must start with '[' at 1 [character 2 line 1] at …
Pramod R
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Does my use case be implemented using Esper CEP

For the requirements of my project, I have been suggested to use User Esper CEP engine. However, after going through some documentation of Esper, I don't think, it suits to my use case. Can anybody explain how Esper can be used given the below…
prasadsh
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How to work with wso2CEP3.0.0 and activemq 5.8.0

i am using wso2cep 3.0.0 and activemq5.8.0 As per CEP documents i wish to Publish events using CEP. For that i started activemq with 2 define QUEUES with the name jmsProxy for incoming message and JmsProxy for out message.I added required jars in…
faisal shaik
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Drools Rule to handle 2 different facts inserted within a certain time

I need to handle a situation where I am notified when 2 different facts are received in my working memory within 30 seconds of each other. Then I want the system to remove the facts from the working memory after they are handled. For example, say I…
El Guapo
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Text Event Builder Regex not working

I am new to WSO2 CEP tool. My input comes from JMS message in the below format Latitude=77.77, Longitude=70.12 Latitude=70.12, Longitude60.13 Latitude=xx.xx, Longitude=xx.xx - - - How do I formulate a regex to extract the values for latitude and…
subbu
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How Event stream Works in wso2cep3.0.0

I am working with wso2cep3.0.0, My input source and out put source is JMs.I written my Input event adapter and output event adapter like this Input adapter is
faisal shaik
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Oracle CEP on Oracle Linux

I went to run my application on Eclipse IDE 3.7 using an Oracle Complex event processing server 11.1, it works with Windows 7 and Ubuntu 11.10, the problem is that it doesn't work Oracle Lunix 6. I am not familiar with this OS, I need your help…
Tarek Fares
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WSO2 CEP 3.0 for Cassandra database

I need to use WSO2 CEP 3.0 for a project but I do not have a clue about it. My idea is to use the CEP engine as triggers on a little Cassandra database that I have created , to edit one field when another one is changed. I have read the official…
Eneko
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Standard language or model theory for Complex Event Processing system

We are developing a library for complex event processing. Is there any standard or widely accepted language with clear semantics that we could based on? After some research it seems all available options are vendor/platform specific.
jruizaranguren
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WSO2 CEP 3.0.0 support of XPath 2.0 functions in the event builder

I am currently creating an Event Builder in WSO2 CEP 3.0.0. based on an XML mapping. I would like to use soma XPath 2.0 functions like tokenize in the XPath expression. It seems that that the Xpath parser used by CEP is jaxen that does only support…
boubou191911
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wso2 CEP 3.0.0: casting to double type

In WSO2 CEP 3.0.0. I experienced some confusing behavior with attributes of double type. Assume the following siddhi script: define stream LongStream LongAttr1 long, LongAttr2 long; define stream DoubleStream DoubleAttr1 double; from…
boubou191911
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