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Message
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| kendras |
 Posted: Wed Dec 20, 2006 7:35 am Post subject: .NET and J2EE Interoperability using WebSphere MQ |
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Novice
Joined: 31 Jan 2006
Posts: 12
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Hi guys,
I've a .Net Client whitch put a message on a mq file, and a java client that read the message.
I've got an error. I think that is due to the a problem of interoperability.
I've read this article : A Basic .NET and J2EE Interoperability using WebSphere MQ, and try their samples, but it does not work at all.
Is there somebody to help me ?
Thanks |
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| Vitor |
| Posted: Wed Dec 20, 2006 7:39 am Post subject: Re: .NET and J2EE Interoperability using WebSphere MQ |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| kendras wrote: |
| Is there somebody to help me ? |
There are really quite a few of us. 
Something a bit more detailed than "I've got an error" would get a more helpful response. Also details of what version of MQ & .NET you're using would be nice.
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Insanity is the best defence. |
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| kendras |
| Posted: Wed Dec 20, 2006 7:44 am Post subject: |
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Novice
Joined: 31 Jan 2006
Posts: 12
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Yeah of course 
My original message is :
| Code: |
<balise>
<pouet>test</pouet>
</balise> |
When i write with the WriteString method (queueMessage.WriteString( message ) ), the java client get a message like this :
| Quote: |
<balise>
<pouet>test</pouet>
</balise>?>?>?>?>?>?>?>?>?>?>?>?>?>?>?>?>?>?>?>?>? |
If i use WriteUTF( message ) (queueMessage.WriteUTF( message )), an error is occured in the java client
An IOException occured while writing to the message buffer: java.io.EOFException
(sorry for my language, i'm french  ) |
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| jefflowrey |
| Posted: Wed Dec 20, 2006 7:49 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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How long is "message"?
You will use WriteString, you will not use WriteUTF.
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| fjb_saper |
| Posted: Wed Dec 20, 2006 3:44 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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And remember string conversions in .NET where the default is unicode and not UTF-8....
Make sure when you write to the queue that the buffer is clean. Always clear/initialize the buffer before setting the message content into the buffer.
Always make sure the buffer length is correct before starting the put operation...
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| kendras |
| Posted: Thu Dec 21, 2006 1:08 am Post subject: |
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Novice
Joined: 31 Jan 2006
Posts: 12
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My message lenght is 36.
| Code: |
| String message = "<balise><pouet>test</pouet></balise>"; |
First Test :
| Code: |
| queueMessage.WriteUTF( message ); |
On The WMQ Server, my message is received as :
| Quote: |
| $ <balise><pouet>test</pouet></balise> |
=> Lengh : 38 ($ and a space have been added at the begining, i don't know why)
| Code: |
24 00 3C 62 61 6C 69 73 $.<balis
65 3E 3C 70 6F 75 65 74 e><pouet
3E 74 65 73 74 3C 2F 70 >test</p
6F 75 65 74 3E 3C 2F 62 ouet></b
61 6C 69 73 65 3E alise> |
Second Test :
| Code: |
| queueMessage.WriteString( message ); |
On The WMQ Server, my message is received as :
| Quote: |
| <balise><pouet>test</pouet></balise> |
=> Lengh : 72 (i don't know why, it add 00 between char)
| Code: |
3C 00 62 00 61 00 6C 00 <.b.a.l.
69 00 73 00 65 00 3E 00 i.s.e.>.
3C 00 70 00 6F 00 75 00 <.p.o.u.
65 00 74 00 3E 00 74 00 e.t.>.t.
65 00 73 00 74 00 3C 00 e.s.t.<.
2F 00 70 00 6F 00 75 00 /.p.o.u.
65 00 74 00 3E 00 3C 00 e.t.>.<.
2F 00 62 00 61 00 6C 00 /.b.a.l.
69 00 73 00 65 00 3E 00 i.s.e.>. |
Java client can't get both message... |
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| Vitor |
| Posted: Thu Dec 21, 2006 1:20 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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Disclaimer - I know very little about Java. I could be talking rubbish.
1st test - it may just be a freaky coincidence, but X'24' = 36 in decimal, the length of your message without what looks like a little endian integer on the front of it-it's not a space it's a null, so is actually X'0024'. I think it's a length indicator been added by some means (buffer length incorporated into message??)
2nd test - you get that when unicode (double byte) is interpreted as a string. Possibly the other way round.
I think you need to sit down, work out how to set the code page on both sides, set a common string strategy (like write.String as per jefflowrey and make both sides common.
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| kendras |
| Posted: Thu Dec 21, 2006 1:33 am Post subject: |
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Novice
Joined: 31 Jan 2006
Posts: 12
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AHHH YESS
I've found the method !
In my .Net client, i've used the WriteBytes Method, and on the java client, i've used the ReadString method, and it's work.
Thanks lot for help |
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| Vitor |
| Posted: Thu Dec 21, 2006 1:37 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| kendras wrote: |
I've found the method !
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If it works, it's a solution. Well done you.
| kendras wrote: |
Thanks lot for help
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You're welcome.
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| fjb_saper |
| Posted: Thu Dec 21, 2006 2:52 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| kendras wrote: |
AHHH YESS
I've found the method !
In my .Net client, i've used the WriteBytes Method, and on the java client, i've used the ReadString method, and it's work.
Thanks lot for help |
Use the search button. You weren't listening.
The .NET default is CCSID 1200 (or unicode or utf-16) and has 00 in front of the char...
In order to write in UTF-8 you need to use some specific method or use something like .writeascii()(CCSID437)...
Anyways it should make no difference to your JMS/java app. Just have the format on the message set to MQSTR and set the correct CCSID and encoding on the message.
Remember to do a read with convert in base java
Enjoy
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