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Message
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| NSJ |
 Posted: Mon Aug 08, 2005 11:05 pm Post subject: EBCDIC to ASCII conversion |
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Novice
Joined: 06 Jul 2005
Posts: 12
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Hi All
I am trying out some basic conversion from EBCDIC to ASCII .i am very new to this.I will describe what i am trying to do. I dont know whether what i am doing is possible or not.
The queue manager is on Windows XP professional
MQ Version 5.3
i am using the Java API for putting and getting the messages.
I have a java program which puts a Text message onto a Queue after converting the text into ebcdic. The code is as below:
| Code: |
MQMessage hello_world = new MQMessage();
hello_world.format=MQC.MQFMT_STRING;
hello_world.characterSet=500;
String a = "TEST MESSAGE";
byte[] b = a.getBytes();
String b1 = new String(b, "Cp500");
System.out.println("The EBCDIC string is :"+b1);
hello_world.writeString(b1);
// specify the message options...
MQPutMessageOptions pmo = new MQPutMessageOptions(); // accept the // defaults,
// put the message on the queue
system_default_local_queue.put(hello_world,pmo); |
This puts the message on to the queue successfully and when i browse the queue using RfhUtil i can see the ebcdic message.
Next i am reading the message from the queue using another java program.I am using MQ_GMO_Convert option but the message doesnt get converted. It remains as the EBCDIC string. Am i doing something wrong.
The Java program for getting the message is as below.
| Code: |
java.util.Hashtable properties = new java.util.Hashtable();
properties.put("MQC.CCSID_PROPERTY", "850");
// Create a connection to the queue manager
qMgr = new MQQueueManager(qManager, properties);
int openOptions = MQC.MQOO_INPUT_AS_Q_DEF | MQC.MQOO_OUTPUT ;
MQEnvironment.CCSID=850;
MQQueue system_default_local_queue =
qMgr.accessQueue("ORDER.OUT",
openOptions,
"ICSQM", // default q manager
null, // no dynamic q name
null); // no alternate user id
MQMessage retrievedMessage = new MQMessage();
retrievedMessage.characterSet=850;
MQGetMessageOptions gmo = new MQGetMessageOptions(); // accept the defaults
gmo.options = gmo.options|MQC.MQGMO_CONVERT;
// get the message off the queue...
system_default_local_queue.get(retrievedMessage, gmo);
String msgText = retrievedMessage.readLine();
System.out.println("The message is: " + msgText); |
Please let me know if you need any more information.
Thanks
NSJ
Last edited by NSJ on Tue Aug 09, 2005 5:30 am; edited 1 time in total |
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| jefflowrey |
| Posted: Tue Aug 09, 2005 3:30 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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There is a utility, amqsbcg or amqsbcgc, installed with the samples (<Mq-install-root>/samp/bin on Unix, <mq-install-root>\Tools\c\Samples\Bin on Windows).
It will dump the contents of a queue into a fairly useful output format.
Write your message, and then dump it using this utility, and then post the results here.
_________________
I am *not* the model of the modern major general. |
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| NSJ |
| Posted: Tue Aug 09, 2005 6:40 am Post subject: |
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Novice
Joined: 06 Jul 2005
Posts: 12
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Hi
Thats a cool utility.I put the message on the queue and ran AMQSBGC.Here is the output.
| Code: |
AMQSBCG0 - starts here
**********************
MQOPEN - 'ORDER.OUT'
MQGET of message number 1
****Message descriptor****
StrucId : 'MD ' Version : 2
Report : 0 MsgType : 8
Expiry : -1 Feedback : 0
Encoding : 273 CodedCharSetId : 500
Format : 'MQSTR '
Priority : 0 Persistence : 0
MsgId : X'414D5120494353514D20202020202020A126F34220001D01'
CorrelId : X'000000000000000000000000000000000000000000000000'
BackoutCount : 0
ReplyToQ : ' '
ReplyToQMgr : 'ICSQM '
** Identity Context
UserIdentifier : 'db2admin '
AccountingToken :
X'160105150000006F377A03805550D53F8B31B0F903000000000000000000000B'
ApplIdentityData : ' '
** Origin Context
PutApplType : '11'
PutApplName : 'MB\eclipse\jre\bin\javaw.exe'
PutDate : '20050809' PutTime : '14270396'
ApplOriginData : ' '
GroupId : X'000000000000000000000000000000000000000000000000'
MsgSeqNumber : '1'
Offset : '0'
MsgFlags : '0'
OriginalLength : '-1'
**** Message ****
length - 12 bytes
00000000: 5445 5354 204D 4553 5341 4745 'TEST MESSAGE '
No more messages
MQCLOSE
MQDISC |
The program is puting on the queue: èáëè?(áëë åá which in ASCII is the text TEST MESSAGE |
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| EddieA |
| Posted: Tue Aug 09, 2005 6:48 am Post subject: |
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Jedi
Joined: 28 Jun 2001
Posts: 2453
Location: Los Angeles
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| Quote: |
| CodedCharSetId : 500 |
That says the message should be in EBCDIC.
| Quote: |
| 5445 5354 204D 4553 5341 4745 'TEST MESSAGE ' |
But that's ASCII. So, a GET with Convert will produxe garbage.
Cheers,
_________________
Eddie Atherton
IBM Certified Solution Developer - WebSphere Message Broker V6.1
IBM Certified Solution Developer - WebSphere Message Broker V7.0 |
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| NSJ |
| Posted: Wed Aug 10, 2005 4:29 am Post subject: |
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Novice
Joined: 06 Jul 2005
Posts: 12
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I am a bit confused. When i used RfHutil to read the message it came out as ebcdic characters ie èáëè?(áëë åá and even when i used java program i got the ebcdic characters.Only when i used AMQSBGC does the ASCII text comes ie TEST MESSAGE. Why are the results differing, Is the message on the queue ASCII or ebcdic.
Thanks
NSJ |
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| wschutz |
| Posted: Wed Aug 10, 2005 4:47 am Post subject: |
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Jedi Knight
Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)
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Because amqsbcg does not specify GMO_Convert. Your java program does:
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gmo.options = gmo.options|MQC.MQGMO_CONVERT;
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MQ assumes that the CCSID is correct, so it simply apply the conversion table from 500->437 (or whatever ascii page your are using), which produces "trash".
| Quote: |
| I have a java program which puts a Text message onto a Queue after converting the text into ebcdic |
It appears (from amsqbcg) that your java program is NOT producing an ebcdic string, thats the problem here.
_________________
-wayne |
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| fjb_saper |
| Posted: Wed Aug 10, 2005 6:07 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Yes you are doing something wrong.
If you want for the Mainframe to see the message in EBCDIC without using get with convert
you can try the following:
a) convert on the channel
b) use a channel exit on the MF (special format conversion...)
c) use JMS and define the remote queue in JNDI with CCSID 500 and use TextMessage
And then just put normal text in the ccsid of your connecting platform...
and do not forget to set your message format to MQSTR
Enjoy  |
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