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| Printing changing the correlation-Id from Byte to String |
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| starki78 |
 Posted: Tue Oct 07, 2008 8:21 am Post subject: Printing changing the correlation-Id from Byte to String |
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Acolyte
Joined: 24 Sep 2007
Posts: 53
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Hi
I've that urgent request.
1. sending the correlation-id with binary to queue
String str = "000000000000000000000000000000000000000000081DA1";
mBuf.correlationId = str.getBytes();
2. Extracting it:
MQQueue q1 = qMgr.accessQueue(queuereceive, getqOpenOptions, null, null, null);
q1.get(rcvMessage,gmo);
3. Converting the byte to Sting.
System.out.println(new String(rcvMessage.correlationId));
This is what I get:
000000000000000000000000
Please help me finding the error
Thanks
Christian |
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| elvis_gn |
| Posted: Tue Oct 07, 2008 10:05 am Post subject: |
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Padawan
Joined: 08 Oct 2004
Posts: 1905
Location: Dubai
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Hi starki78,
Look up the MQ Samples on the IBM Website...there are samples related to MessageId and CorrelationId where you'll find Hex conversion code.
Regards. |
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| atheek |
| Posted: Wed Oct 08, 2008 1:58 am Post subject: |
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Partisan
Joined: 01 Jun 2006
Posts: 327
Location: Sydney
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For (1) you need to do hex string to byte array conversion
For (3) you need to do byte array to hex string conversion
Sample piece of code from google:
Hex String to Byte Array
| Code: |
public static byte[] toBinArray( String hexStr ){
byte bArray[] = new byte[hexStr.length()/2];
for(int i=0; i<(hexStr.length()/2); i++){
byte firstNibble = Byte.parseByte(hexStr.substring(2*i,2*i+1),16); // [x,y)
byte secondNibble = Byte.parseByte(hexStr.substring(2*i+1,2*i+2),16);
int finalByte = (secondNibble) | (firstNibble << 4 ); // bit-operations only with numbers, not bytes.
bArray[i] = (byte) finalByte;
}
return bArray;
} |
Byte Array to Hex String
| Code: |
static char[] hexChar = {
'0' , '1' , '2' , '3' ,
'4' , '5' , '6' , '7' ,
'8' , '9' , 'A' , 'B' ,
'C' , 'D' , 'E' , 'F'
};
public static String toHexString ( byte[] b ) {
StringBuffer sb = new StringBuffer( b.length * 2 );
for ( int i=0; i<b.length; i++ ) {
// look up high nibble char
sb.append( hexChar [( b[i] & 0xf0 ) >>> 4] ); // fill left with zero bits
// look up low nibble char
sb.append( hexChar [b[i] & 0x0f] );
}
return sb.toString();
}
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| meetgaurav |
| Posted: Sun Dec 14, 2008 8:41 am Post subject: For Testing Purpose |
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Voyager
Joined: 08 Sep 2008
Posts: 94
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Hi
For testing purpose I need to set the message id and Corel id as
MsgId =NSC123
CorrelId =BSC123 from JAVA API or JMS API..
In JMS API I can able to set the coreel id and the msg id is generated by QMGR to some unique one and not NSC123..
In Java API not able to convert it to byte char. Since 'N' and 'S' are not an Hexadecimal
Please assist me |
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| fjb_saper |
| Posted: Sun Dec 14, 2008 11:39 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Best practice says you let the qmgr set msgId and CorrelId....
MQJMS adheres to best practice and you will never be allowed to set the msgId.
Anyways... here it goes.
Get an array of byte[24] that you initialize with x00 for each byte.
String myString = "NSB123";
byte[] mystartbytes=myString.getBytes();
You overwrite the first bytes of your initialized array with mystartbytes...
And remember a byte is a byte is a byte... so it NEVER gets translated from one platform to the other or one CCSID to the other!!
Have fun 
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| bruce2359 |
| Posted: Sun Dec 14, 2008 2:43 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9469
Location: US: west coast, almost. Otherwise, enroute.
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And remember a byte is a byte is a byte...
Which means that it is not character; and therefore does not conform to a coded character set id (CCSID).
_________________
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ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| meetgaurav |
| Posted: Mon Dec 15, 2008 1:32 am Post subject: |
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Voyager
Joined: 08 Sep 2008
Posts: 94
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| I tried this but not able to do that.. could you please give me the extact code what you were guided me to do?? |
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| meetgaurav |
| Posted: Thu Dec 18, 2008 10:47 pm Post subject: |
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Voyager
Joined: 08 Sep 2008
Posts: 94
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I tried but this is not working.. Could you please assist me
byte [] test = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
byte[] mystring = msgId.getBytes();
byte[] msg1 = new byte[mystring.length];
for(int i=0;i<msg1.length;++i)
mystring[i] = (byte)(test[i]);
msg.messageId = mystring;
msg.correlationId = mystring; |
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| RogerLacroix |
| Posted: Fri Dec 19, 2008 9:25 am Post subject: |
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Jedi Knight
Joined: 15 May 2001
Posts: 3264
Location: London, ON Canada
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| meetgaurav wrote: |
I tried but this is not working.. Could you please assist me
| Code: |
byte [] test = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
byte[] mystring = msgId.getBytes();
byte[] msg1 = new byte[mystring.length];
for(int i=0;i<msg1.length;++i)
mystring[i] = (byte)(test[i]);
msg.messageId = mystring;
msg.correlationId = mystring; |
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What in the world are you doing?
| Code: |
for(int i=0;i<msg1.length;++i)
mystring[i] = (byte)(test[i]); |
This just copies 0x00 to every byte of "mystring" (because that is all that test contains).
Use the toHexString() method that atheek gave you.
If you only want to save then reuse the MsgId then just do:
| Code: |
byte[] savedMsgId = msgId.getBytes();
...
msg.correlationId = savedMsgId; |
Regards,
Roger Lacroix
Capitalware Inc.
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