Can I access DRIVERCTL in an XLATE?

[Vincent Tran]

Hi, I am basically working on a proof of concept of:

Clients <--> Cloverleaf with multi-server <--> Server

The Client will send a message to Cloverleaf, Cloverleaf will send a message to the Server, the Server will send a response back to Cloverleaf, Cloverleaf will send the response back to the client.

Since multi-server is turned on, I believe I need to append the CONNID to the message that is sent to the server. Is this done in an XLATE? I’m not sure how to access the DRIVERCTL data in an XLATE. Any help or suggestions would be appreciated, thanks!

– Vincent

Topic

[Jim Kosloskey]

Vincent,

I think you can reference the metadata for a message via Tcl while inside an Xlate.

However, in the scenario you describe, I don’t think the DRIVERCTL on the message sent by server (I am assuming a Query Reply) will have the information you need. Therefore, being able to access the metadata inside an Xlate won’t do you any good.

You will need to devise a mechanism by which you can associate the reply with the client IP address outside of the message.

One method I can think of is to have the IP address in the message and require the server to return that somewhere in the response. Another mechanism is to have some sort of Query identification which is returned in the response such that it can be matched against something like a file which contains the IP asociated with that Query ID.

Or perhaps some other mechanism…

Jim Kosloskey

email: jim.kosloskey@jim-kosloskey.com 29+ years Cloverleaf, 59 years IT - old fart.

[Vincent Tran]

Thanks for your advice Jim.

I figured it out. In my TPS Inbound Data I have a TCL script that appends DRIVERCTL to the message. Since this is just a proof of concept I just appended it at the beginning. The message is routed to the server. The messages from the server are routed back to Cloverleaf. In the TPS Outbound Data I strip off the DRIVERCTL from the message received from the Server and then set the DRIVERCTL for the message.

I noticed it would crash sometimes, when I turned off retry for sending back to the client, it didn’t crash anymore.

Now I just need to test it more…

[Russ Ross]

Jim you are correct that metadata can be accessed in an Xlate.

The main commands for accessing metadata in an Xlate are:

xpmmetaget

xpmmetaset

In fact, you helped me with a proc called xlt_USERDATA_keylset that does just that and can be found in clovertech post

https://usspvlclovertch2.infor.com/viewtopic.php?t=1367&highlight=xltuserdatakeylset” class=”bbcode_url”>https://usspvlclovertch2.infor.com/viewtopic.php?t=1367&highlight=xltuserdatakeylset

Russ Ross
RussRoss318@gmail.com

[Author]

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