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| Bahan |
 Posted: Mon Jul 17, 2006 4:26 am Post subject: Get the name of the transfered file |
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Apprentice
Joined: 16 Jul 2006
Posts: 47
Location: France
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Hi again everyone.
I'm wondering how, on my receiver server, I can get the name of the file I sent from my sender server.
I tried to use amqsbcg on my receiver server, but I didn't see the name of my file among all the displayed parameters.
I don't know if it is or not an easy question about MQseries. Maybe it is possible to find somewhere a guide listing every MQseries functions ?
I'm sorry if it is an easy question.
Already thank you for your answers.
Bahan
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Last edited by Bahan on Mon Jul 17, 2006 6:12 am; edited 1 time in total |
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| Vitor |
| Posted: Mon Jul 17, 2006 4:34 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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Are you talking about Reference Messages? If so, it should be in the MQRMH structure; though my knowledge of this is more theoretical & should be taken with a pinch of salt .
There's quite a bit about moving bulk data by Reference Message (and the structure of the MQRMH) in the online help:
http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp
You might get a guide there.
Not actually used it in anger myself you see. 
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| Bahan |
| Posted: Mon Jul 17, 2006 4:53 am Post subject: |
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Apprentice
Joined: 16 Jul 2006
Posts: 47
Location: France
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Hum, what do you mean by reference message ? ^_^
In fact, I have a file named testBahan.txt that I sent from my sender server. And I want to get this name when I receive the message on my receiver server.
Already thank you for your answer.
Bahan
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| Vitor |
| Posted: Mon Jul 17, 2006 5:11 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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Ah - reference messages are a way (not approved of by all I think) of moving files round in MQ Series. It was my assumption that you were using these to move the file you refered to. I was in error and I apologise 
Do you instead mean that you have a file called testBahan.txt which you have used as input to a Java equivalent of amqsput to populate the target queue? If so, the file name is not transferred because all MQ can see is the contents of the file expressed as messages.
The best you'll get at the receiving end is the name of the sending application. It's possible (using custom code) to record some details (like original file name) in the MQMD accounting fields, or perhaps as a user - defined header to the message depending on your requirements.
If I still have the stick by the wrong end please accept my continuing apologies and correct me further. 
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| Bahan |
| Posted: Mon Jul 17, 2006 5:16 am Post subject: |
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Apprentice
Joined: 16 Jul 2006
Posts: 47
Location: France
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No problem. 
| Quote: |
| Do you instead mean that you have a file called testBahan.txt which you have used as input to a Java equivalent of amqsput to populate the target queue? |
Exactly.
| Quote: |
| If so, the file name is not transferred because all MQ can see is the contents of the file expressed as messages. |
Ok, I will see how I can do. In fact, my problem is really annoying, because I can't modify even one thing in the sender part .
Thank you for your help.
Bahan
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| Vitor |
| Posted: Mon Jul 17, 2006 5:25 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Bahan wrote: |
In fact, my problem is really annoying, because I can't modify even one thing in the sender part .
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This is often the way.
If you want to post details of your requirements then maybe we can offer some suggestions as to a possible design? 
If you're trying to move a file over MQ, be aware that there are a number of commercial offerings that do this. They are a better wheel than you're likely to reinvent! 
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| PieterV |
| Posted: Mon Jul 17, 2006 5:34 am Post subject: |
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Disciple
Joined: 04 Jan 2006
Posts: 164
Location: Belgium
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If your budget allows you to, you can always use IBM Message Broker in combination with the JText Adapter.
That adapter can pick up a file, (and remembers the file name), put it on a queue.
In the message broker you can change your message (if you mean that by changing the sender part) and transfer it to another queue (or whatever output method you require).
You can output it again to a file using the JText Adapter. |
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| Vitor |
| Posted: Mon Jul 17, 2006 5:40 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| PieterV wrote: |
| If your budget allows you to... |
I should have emphasied that the commercial solutions to which I referred (of which this is an excelent example) do require the payment of additional sums of money!
There's also a question mark raised by your assertion that
| Bahan wrote: |
In fact, my problem is really annoying, because I can't modify even one thing in the sender part . |
If you can't change anything on the sender side then you will need the kind of non-invasive solution PieterV has suggested, rather than PM4Data or similar.
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| Bahan |
| Posted: Mon Jul 17, 2006 5:47 am Post subject: |
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Apprentice
Joined: 16 Jul 2006
Posts: 47
Location: France
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This is strange because on another queue MyQueue1, I have as header the name of the source file and for this queue MyQueue2, I don't have anything...
I'll see if I really can't modify something on the sender server.
Thank you for your help!
Bahan
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| Vitor |
| Posted: Mon Jul 17, 2006 5:50 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Bahan wrote: |
This is strange because on another queue MyQueue1, I have as header the name of the source file and for this queue MyQueue2, I don't have anything...
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Do you mean it's in the header i.e. the MQMD or a header as in on the front of the message? In both cases the sending side can achieve this through code. If it's in the MQMD exactly where?
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| Bahan |
| Posted: Mon Jul 17, 2006 6:03 am Post subject: |
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Apprentice
Joined: 16 Jul 2006
Posts: 47
Location: France
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Hum, I think it is on the beginning of my message bacause it appears when I display my message.
Here is my message when I do a printf :
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[M+,FD:PathAndNameOfMyFile,MN:0
Line1OfMyFile
Line2OfMyFile
] |
Bahan
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| Vitor |
| Posted: Mon Jul 17, 2006 6:09 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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Then it's almost certainly being inserted by the sender code. I don't recognise the format as an MQ one, though I stand ready to be corrected on this (anyone?)
Why on one and not the other? Ask the guy who wrote the code......?
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| Bahan |
| Posted: Mon Jul 17, 2006 6:11 am Post subject: |
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Apprentice
Joined: 16 Jul 2006
Posts: 47
Location: France
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If only I could but he is not there anymore, and for long ago .
A big thank you for your help.
Bahan
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| Bahan |
| Posted: Mon Jul 17, 2006 6:24 am Post subject: |
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Apprentice
Joined: 16 Jul 2006
Posts: 47
Location: France
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I have another question (tadaaa ).
And what about the MSGID ? I can't use that ?
Bahan
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| Vitor |
| Posted: Mon Jul 17, 2006 6:41 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| Bahan wrote: |
| And what about the MSGID ? I can't use that ? |
To identify a given message? Certainly. As a Xmas decoration? Less use. 
To identify the source file name? (Another assumption here - accept a pre-emptive apology)
Short answer:
It's a generated field. More importantly it's not a string, it's a 24 byte array. It's not converted between code pages and may have nulls at any position within it which will confuse your C program.
Longer answer:
If you want to use it as provided it will tell you nothing about the source of the message. It's a generated 24 byte field which should be unique within the scope of your MQ installation if you don't want bad things to start happening.
If you're going to insert data into it, don't. Because it's a byte field, attempts to use it to contain string or other data are not doomed to fail, but the omens are bad. Use the provided Accounting fields (which I think I suggested earlier) to store stuff in the MQMD. This would require a change at the sender end & is not necessarially recommended. I suspect this is why the information is turning up appended to the file data in the front of the message - good safe place to put it.
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