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MQSeries.net Forum IndexGeneral IBM MQ Supportdmpmqmsg: readable format

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vmanel
PostPosted: Sat Sep 14, 2019 5:24 am Post subject: dmpmqmsg: readable format Reply with quote

Apprentice

Joined: 12 Mar 2019
Posts: 37

Hi,

Is there a way to save messages from queue to file using dmqmqmsg in complete human readable format? Just like Rfhutilc or MQ visual edit?

I tried using options like -dp or -dt but the message is partially in readable format. Also this option says its not code page safe. So is there a way to save these messages in complete readable format and then use that to load to another queue?

Thanks
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bruce2359
PostPosted: Sat Sep 14, 2019 5:43 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8513
Location: US: west coast, almost. Otherwise, enroute.

Please post what you see as unreadable.

Use amqsbcg or amqsgbr to display a message, then post here.
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vmanel
PostPosted: Sat Sep 14, 2019 9:23 am Post subject: Reply with quote

Apprentice

Joined: 12 Mar 2019
Posts: 37

bruce2359 wrote:
Please post what you see as unreadable.

Use amqsbcg or amqsgbr to display a message, then post here.


Unreadable means its in hexadecimal format, not in original format(such as an readable xml message with tags). I just wanted to know if its possible to do that using dmpmqmsg. Because I want to use that as alternative to Rfhutilc or mq visual edit as they are too slow for thousands of messages
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bruce2359
PostPosted: Sat Sep 14, 2019 12:42 pm Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 8513
Location: US: west coast, almost. Otherwise, enroute.

The MQMD should be readable. Please be precise. Is it just your app data payload that is unreadable, but the MQMD is in clear text?

Hex is readable. amqsbcg will display the MQMD and your app data. Please display one message - we don't need to see thousands.
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hughson
PostPosted: Mon Sep 16, 2019 11:11 pm Post subject: Re: dmpmqmsg: readable format Reply with quote

Grand Master

Joined: 09 May 2013
Posts: 1274
Location: Bay of Plenty, New Zealand

vmanel wrote:
I tried using options like -dp or -dt but the message is partially in readable format.

If the message is only partially readable when you use these options, then that would imply that not all the message was readable - which is why there is a warning associated with it.

Perhaps you can show us an example of what you mean by partially readable too?

The only way to be sure to get exactly the same message back on a queue after reloading it from a file is to use hex.

-dp and -dt are there to allow you to read it if you only need to view the messages and don't need to reload an exact copy later.

Cheers,
Morag
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pakuma3
PostPosted: Wed Sep 18, 2019 12:55 pm Post subject: Reply with quote

Newbie

Joined: 27 Feb 2015
Posts: 6

I believe he means getting the same message back.
For example I loaded messages (1 msg per line in a text file) using ampsput TESTQ QM1 < TESTFILE.TXT

The closest to the original file I can get is with amqsget but it still ads:
Sample AMQSGET0 start
message <
...
>
no more messages
Sample AMQSGET0 end
And browse adds hex code

I think he means a way to get the headers and descriptors removed from the output file and get the closest thing to his original file, if not the original file.

I have also been looking for a Command Line alternative to RFHUTIL (since you can get the same message by unchecking the Include Headers and Descriptors boxes).

Sorry to eavesdrop
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Vitor
PostPosted: Wed Sep 18, 2019 4:04 pm Post subject: Reply with quote

Grand High Poobah

Joined: 11 Nov 2005
Posts: 25841
Location: Texas, USA

pakuma3 wrote:
I have also been looking for a Command Line alternative to RFHUTIL (since you can get the same message by unchecking the Include Headers and Descriptors boxes).


The amqsget sample is entirely that - a sample. It's not intended for production use with thousands of messages.

If you want a command line utility that returns just the actual messages without any human readable starting / stopping messages, modify the amqsget sample code to meet the need or write your own in a language of your choice. Such a utility could also do something more useful with the messages than echoing them to the console.....

It's worth pointing out that both RFHUtil and VisualEdit fit in the same class; neither are intended for production strength processing of messages. If you routinely need to save thousands of messages using a utility, something's wrong with your design.

Staying with the topic of "something wrong", if what you're getting back is unreadable because it's unprintable characters, has odd formatting or similar then I agree with my worthy associates; there's a character set problem.

One final side note; if you put an XML document as a message, don't expect it to come back all pretty with one tag on each line. An application putting thousands of XML documents almost certainly won't bother to pretty print them (and many XML parsers lack the ability on serialization) because whitespace (like line feeds) between tags is ignored on parsing. Things like XMLSpy are deliberately parsing the XML and formatting it to make it human readable.
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PaulClarke
PostPosted: Wed Sep 18, 2019 6:52 pm Post subject: Reply with quote

Guardian

Joined: 17 Nov 2005
Posts: 946
Location: New Zealand

DMPMQMSG is based on my QLOAD (MO03 SupportPac) program. Since leaving IBM I have continued to enhance QLOAD which now contains lots of new features not in the original program. This is, of course, now a commercial product rather than a free tool but the price is pretty negligible.

Anyway the point of this post is two fold. Firstly, our QLOAD product has another output format -dr which is 'raw' mode. This outputs the messages in as raw a form as possible. This might be closer to what you are looking for. Secondly since we are currently maintaining the QLOAD product we are always interested in hearing of new requirements so if you believe that it doesn't quite do what you want then by all means give us a set of specifications and we can tell you whether it seems doable.

In the meantime if you (or anyone else) are interested in trying out the current QLOAD product and it's new features then feel free to email me at support@mqgem.com

Regards,

Paul.
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HubertKleinmanns
PostPosted: Thu Sep 19, 2019 1:59 am Post subject: Reply with quote

Shaman

Joined: 24 Feb 2004
Posts: 723
Location: Germany

In a bash this script code converts the Hex to Chars:
Code:
grep '^X ' dmpmqmsg.output | sed "s/^X //" > tmpfile

rm -f dmpmqmsg.converted

cat tmpfile | while read line
do
   msg=$line

   while [ "$msg" != "" ]
   do
      char=`echo $msg | cut -c 1,2`

      printf "\x$char" >> dmpmqmsg.converted

      msg=`echo $msg | cut -c 3-`
   done
done

cat dmpmqmsg.converted

But I'm looking for a "printf" substitution in a Korn-Shell.
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HubertKleinmanns
PostPosted: Thu Sep 19, 2019 5:43 am Post subject: Reply with quote

Shaman

Joined: 24 Feb 2004
Posts: 723
Location: Germany

In the meantime I found a solution for AIX Korn shell:
Code:
#!/usr/bin/sh

# Specify input queue o command line.
INQUEUE=$1

# Check the command line option.
[ "$INQUEUE" = "" ] && echo "usage `basename $0` in_queue" && exit 1

# Define the output file name.
INFILE=$INQUEUE.out

# Browse first message ('-r 1') as ASCII ('-dA') from queue and write it to the file.
dmpmqmsg -r 1 -dA -m SI1AD001 -i $INQUEUE -F $INFILE > /dev/null 2>&1

# Define the temp file name.
TMPFILE=$INFILE.tmp

# Get the content (lines starting with 'S ').
grep '^S ' $INFILE | sed "s/^S //" > $TMPFILE
mv $TMPFILE $INFILE

# Read the lines from the temp file ...
cat $INFILE | while read line
do
   # Remove leading and trailing '"' and newline.
   printf "$line" | sed 's/^"//' | sed 's/"$//' >> $TMPFILE
done

# Add a fina newline.
printf "\n" >> $TMPFILE

# Display the message.
cat $TMPFILE

# Remove the files.
rm -f $INFILE $TMPFILE


This script dumps the first message of a queue (non-destructively) and displays the content.

Of course you may extent the script to read a 2nd, 3rd, ... message .
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gbaddeley
PostPosted: Mon Sep 23, 2019 4:28 pm Post subject: Re: dmpmqmsg: readable format Reply with quote

Jedi

Joined: 25 Mar 2003
Posts: 2032
Location: Melbourne, Australia

vmanel wrote:
...So is there a way to save these messages in complete readable format and then use that to load to another queue?
Thanks


It depends on your interpretation of what is "readable" in your MQ messages. Most existing tools adopt a general approach that guarantees messages can be unloaded / loaded on queues. The unload file may or may not be human readable, and for the purposes of loading, it does not matter. Maybe you need a separate program that browses the queue and displays the application specific messages in a readable format, or interprets the unload file.
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HubertKleinmanns
PostPosted: Mon Sep 23, 2019 9:42 pm Post subject: Re: dmpmqmsg: readable format Reply with quote

Shaman

Joined: 24 Feb 2004
Posts: 723
Location: Germany

gbaddeley wrote:
vmanel wrote:
...So is there a way to save these messages in complete readable format and then use that to load to another queue?
Thanks


It depends on your interpretation of what is "readable" in your MQ messages. Most existing tools adopt a general approach that guarantees messages can be unloaded / loaded on queues. The unload file may or may not be human readable, and for the purposes of loading, it does not matter. Maybe you need a separate program that browses the queue and displays the application specific messages in a readable format, or interprets the unload file.



In the past I had a colleague, who was able to read EBCDIC code on z/OS directly. This guy would say, this "D4 D8 E2 85 99 89 85 A2" is a readable Format .
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