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MQSeries.net Forum IndexWebSphere Message Broker SupportDynamic UDP value fetch in ESQL

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Pratik611
PostPosted: Mon Sep 11, 2017 3:40 am Post subject: Dynamic UDP value fetch in ESQL Reply with quote

Newbie

Joined: 27 Jul 2014
Posts: 7

Hi,

There's a requirement wherein we got to use the value of a particular UDP from a list of UDP's based on a parameter in the input message.

Is this possible in ESQL?
So i want to dynamically select my UDP and take its value.
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mqjeff
PostPosted: Mon Sep 11, 2017 4:07 am Post subject: Reply with quote

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Joined: 25 Jun 2008
Posts: 17384

https://www.ibm.com/support/knowledgecenter/SSMKHH_9.0.0/com.ibm.etools.mft.doc/ak01015_.htm
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Pratik611
PostPosted: Mon Sep 11, 2017 8:17 pm Post subject: Reply with quote

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Joined: 27 Jul 2014
Posts: 7

mqjeff wrote:
https://www.ibm.com/support/knowledgecenter/SSMKHH_9.0.0/com.ibm.etools.mft.doc/ak01015_.htm


Hey mqjeff, thanks for the reply.
Read through the entire help but couldnt find out if i can pick a UDP out of a list of UDP's dynamically.
I want to do it similar to the below eg:
Environment.Variable.{VariableValueFromInputMessage}

Something like this with a UDP
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inMo
PostPosted: Tue Sep 12, 2017 6:23 am Post subject: Reply with quote

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Joined: 27 Jun 2009
Posts: 212
Location: NY

What are you doing to cause recognition of the UDP's value(s) in your ESQL code?
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Pratik611
PostPosted: Tue Sep 12, 2017 8:34 pm Post subject: Reply with quote

Newbie

Joined: 27 Jul 2014
Posts: 7

inMo wrote:
What are you doing to cause recognition of the UDP's value(s) in your ESQL code?


So i got this operationID coming in my input message for eg op1 and i have UDP's set like below:
op1=value1,
op2=value2,
op3=value3

so based on the operationID of the incoming message, i need to assign value to a variable FinalValue

so here.. Finalvalue = value1 cos operationid is op1

I hope this makes things clear
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Vitor
PostPosted: Wed Sep 13, 2017 4:46 am Post subject: Reply with quote

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Joined: 11 Nov 2005
Posts: 24448
Location: Ohio, USA

ESQL doesn't have the concept of a hashmap (which it sounds a lot like you're trying to create). Each UDP is a separate and distinct variable with no inherent connection to each other.

It's an easy task to create a CASE statement with the code you outline, and this would work great if you have a fixed number of UDPs that change their value. It's not onerous even if you have a variable number of UDPs as you'd have to change the code to add a new EXTERNAL declaration just to get the UDP to work, so you can add a line to the CASE statement at the same time.
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timber
PostPosted: Thu Sep 14, 2017 4:33 am Post subject: Reply with quote

Yatiri

Joined: 25 Aug 2015
Posts: 654

Alternatively, put all of the properties into a SHARED ROW variable, and access them via the {} syntax:
Code:
SET property1Value = mySharedProperties.{"property1"}
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mqjeff
PostPosted: Thu Sep 14, 2017 5:24 am Post subject: Reply with quote

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Joined: 25 Jun 2008
Posts: 17384

Vitor wrote:
ESQL doesn't have the concept of a hashmap (which it sounds a lot like you're trying to create).


With good programming practices, a logical message tree can be accessed as if it were a hashmap.
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