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Message
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| elaforc |
 Posted: Fri Oct 23, 2009 7:54 am Post subject: XPath set-value numeric |
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Novice
Joined: 29 Sep 2009
Posts: 10
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All,
I am currently using WMB 6.0.2. I am trying to write a simple message flow using a java compute node that will set the persistence to 1 in the MQMD Header using XPath. Currently my code looks as follows:
| Code: |
public void addPersistance(MbMessage msg) throws MbException
{
MbElement root = msg.getRootElement();
root.evaluateXPath("?MQMD/?Persistence[set-value(number(1))]");
}
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I pass in to addPersistance a copy of the message stored in the incoming message assembly parameter from the evaluate function.
I am currently seeing the following error in /var/log/syslog.user (I am on AIX 6):
Oct 23 10:46:38 entmqsx2 user:warn|warning WebSphere Broker v6003[798952]: (ENTCLTX2.ROF)[5912]BIP5912W: Error in parser 'MQMD' whilst writing the field named 'Persistence' to the bitstream. : ENTCLTX2.b467a577-2401-0000-0080-d41ef0a67873: /build/S600_P/src/DataFlowEngine/ImbMqmdParser.cpp: 1081: ImbMqmdParser::writeMqmd: ComIbmJniNode: ROF#FCMComposite_1_2
Oct 23 10:46:38 entmqsx2 user:err|error WebSphere Broker v6003[798952]: (ENTCLTX2.ROF)[5912]BIP2328E: A value of SQL datatype 'CHARACTER' encountered when datatype 'INTEGER' expected. : ENTCLTX2.b467a577-2401-0000-0080-d41ef0a67873: /build/S600_P/src/CommonServices/ImbValue.cpp: 965: ImbValue::typeError: :
I see that it is a type issue, but I am not sure of the proper way to tell xpath to use a numeric value. I tried just passing in set-value('1'), or set-value(1), or set-value(true) just for kicks, but I still see the same error.
Any ideas on the proper way to do this? Thanks for your help. |
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| mqjeff |
| Posted: Fri Oct 23, 2009 9:48 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| Try using an xs: cast. Something like root.evaluateXPath("?MQMD/?Persistence[set-value(xs:integer(1))]"); |
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| elaforc |
| Posted: Fri Oct 23, 2009 10:05 am Post subject: |
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Novice
Joined: 29 Sep 2009
Posts: 10
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Thanks for the response.
Doesn't look like it liked that either.
Oct 23 13:50:06 entmqsx2 user:err|error WebSphere Broker v6003[798952]: (ENTCLTX2.ROF)[5912]BIP4382E: XPath parse error at column '40' in expression '?MQMD/?Persistence[set-value(xs:integer(1))]'. : ENTCLTX2.b467a577-2401-0000-0080-d41ef0a67873: /build/S600_P/src/DataFlowEngine/PluginInterface/ImbXPathParser.y: 494: parse_expression: :
I don't know if casting helps though, because looking at the "set-value" function http://publib.boulder.ibm.com/infocenter/wmbhelp/v6r1m0/index.jsp?topic=/com.ibm.etools.mft.doc/ac30390_.htm
it says:
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This function sets the string value of the context node to the value specified in the argument. object can be any valid expression, and is converted to a string as if a call to the string function is used.
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So it seems to me that no matter what you pass in, its going to cast it to a string.
Maybe XPATH isn't the way to do this?
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| smdavies99 |
| Posted: Fri Oct 23, 2009 10:30 am Post subject: |
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Jedi Council
Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
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| Quote: |
Maybe XPATH isn't the way to do this?
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Yes, ESQL makes this little job very easy 
_________________
WMQ User since 1999
MQSI/WBI/WMB/'Thingy' User since 2002
Linux user since 1995
Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions. |
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| elaforc |
| Posted: Fri Oct 23, 2009 1:57 pm Post subject: |
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Novice
Joined: 29 Sep 2009
Posts: 10
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I determined the solution.
The proper way is as follows:
| Code: |
public void addPersistance(MbMessage msg) throws MbException
{
MbElement root = msg.getRootElement();
MbElement psist = (MbElement)((List)root.evaluateXPath("?MQMD/?Persistence")).get(0);
psist.setValue(newInteger(1));
}
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| mqjeff |
| Posted: Fri Oct 23, 2009 2:20 pm Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| elaforc wrote: |
| I determined the solution. |
You're welcome. |
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| elaforc |
| Posted: Mon Oct 26, 2009 5:11 am Post subject: |
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Novice
Joined: 29 Sep 2009
Posts: 10
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| mqjeff wrote: |
| elaforc wrote: |
| I determined the solution. |
You're welcome. |
Correction, by "I determined the solution" it should read "mqjeff determined the solution and pm'ed me the answer".
Thanks for your help |
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