Request for lack of events/heart beat

Hi all

I'm trying to monitor network packets I send to a specific ip address and also check if I sent packages for that IP special at regular intervals (something like a heartbeat). I transfer the wireshark network output to a csv file and reading in PART with csv adapter.

In order to check for missing events/heart beat (this is used to check if a server responds to the ping at all hours), I followed this link
Re: CEP non-event programmer and
[http://docs.oracle.com/cd/E21764_01/doc.1111/e14476/examples.htm]
I configured the PART. This is the query that I'm shooting

SELECT Packets.ipdst AS ipdst, Packets.ipsrc AS ipsrc, Packets.framelen AS framelen, 'Error-Missing event' AS alertType
of FilterNetworkPackets
() MATCH_RECOGNIZE
PARTITION BY ipdst
MEASURES Ipdst_Packets.ipdst AS ipdst,
Ipdst_Packets.ipsrc AS ipsrc,
Ipdst_Packets.framelen AS framelen
ALL MATCHES
include timer events
MODEL (Ipdst_Packets *)
DURATION 10 DEFINE Ipdst_Packets AS ipdst = "xx.xx.xx.xx")
As packages

I have configured heartbeat (10000) on both inlet channel.

I get output in which some packages are repeated. I don't know how to obtain a missing event notification once the elapsed time, please help me.
Thanks in advance
Shilpa

Hello

The output you get is infact the notification you receive when there is no event with 173.194.5.140 for 10 seconds.

for example, the first exit.
OutputBean:onEvent() eventType = RequiredMailFields object plus RequiredMailFields ki
ND = null time = 696477423597 ipsrc is 192.168.0.10, ipdst = 173.194.5.140.
elt_time = 686477423597, framelen = 5, alertType = error-Missing event isTotalOrderGuarantee = false

Elt_time here's the moment where the event happened and time is the time associated with the output. If you subtract elt_time of time, you will notice that, for each of the output, the difference is 10 * 10 ^ 9 nanos = 10 seconds. So the output above should be interpreted as "no case with ipdst = 173.194.5.140 arrived 10 seconds after the event with framelen = 5' and therefore the notification is generated.

You don't see any output event that has framelen = 3, because after the framelen = 3 entrance arrived, the following entry (with framelen = 5) for this partition arrived before the 10 seconds duration expired.

According to your requirement, it seems that you need some sort of indication in both cases:
(1) whenever an event happens with this ip address - will mark the beginning of the green line
(2) when any does happen for 10 seconds to this ip address after receiving an event for this ip address - will mark the beginning of the red line

I think you can model this as follows:

review from normalEvents:

Select ipdst as ipdst, ipsrc as ipsrc, framelen as framelen, 'The Normal event' as alertType, ELEMENT_TIME as elt_time from FilterNetworkPackets

Discover the missedEvents: (the existing query - added ALL clause MATCHES MULTIPLE so that you get one out every 10 seconds until the next event happens for this partition)

SELECT Packets.ipdst AS ipdst, Packets.ipsrc AS ipsrc, Packets.framelen AS framelen, 'Error-Missing event' AS alertType, Packets.elt_time AS elt_time
of FilterNetworkPackets
MATCH_RECOGNIZE
(
PARTITION BY ipdst
MEASURES
Ipdst_Packets.ipdst AS ipdst,
Ipdst_Packets.ipsrc AS ipsrc,
Ipdst_Packets.framelen AS framelen,
Ipdst_Packets.ELEMENT_TIME AS elt_time
ALL MATCHES
include timer events
MODEL (Ipdst_Packets) DURATION MULTIPLES OF 10
DEFINE Ipdst_Packets AS ipdst = "173.194.5.140") AS packages

AllEvents query:
Select * from (normalEvents union missedEvents)

On the release of the 'allEvents' query, based on the "alertType" of the event, you can trigger appropriate treatment in the bean output.

Concerning

Published by: Mary on March 30, 2012 12:26

Tags: Fusion Middleware

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