Re: [bdbxml] Document modifications are not applied

XmlUpdateContext.setApplyChangesToContainer ist true

BerkModifier.execute( docValue, context,  BerkUpdContext);
XmlDocument retDoc2 = BerkContainer.getDocument (docId)

System.out.println("DEBUG docValue ret2: " + retDoc2.getContentAsString());

The last line shows the document as it was before.


Stephan



George Feinberg wrote:

>
> In order to make updates persistent in the database,
> you must either (1)  call XmlUpdateContext.setApplyChangesToContainer 
> (true)
> on the XmlUpdateContext used for the modification, or
> (2) explicitly call XmlContainer.updateDocument() with
> the new document, after the modification.
>
> Without either of these, the modification only applies
> to the in-memory copy of the document.
>
> Regards,
>
> George
>
>> Does nobody have an idea what the problem could be?
>>
>> Stephan
>>
>>
>> Stephan Korthoff wrote:
>>
>>
>>> Hello,
>>>
>>> I've got a problem with the modification of documents. I took the
>>> modification example from sleepycat.com and
>>> implemented an attribute value change as follows:
>>>
>>>
>>>   ....             try
>>> {
>>>   XmlModify BerkModifier = BerkManager.createModify();
>>>   XmlQueryContext context = BerkManager.createQueryContext();
>>>
>>>   XmlQueryExpression BerkQExp =
>>> BerkManager.prepare("collection('xmachberk.dbxml')/kenndaten 
>>> [@doc_id=d" +                    String.valueOf(intDocId) +
>>> "]/felder_als_attribute/@double_feld_r", context);
>>>
>>>   System.out.println("DEBUG Anfrage:
>>> collection('xmachberk.dbxml')/kenndaten[@doc_id=d"  
>>> +                    String.valueOf(intDocId) +
>>> "]/felder_als_attribute/@double_feld_r");
>>>
>>>   BerkModifier.addUpdateStep(BerkQExp, newAttributeValue );
>>>    System.out.println("DEBUG retdoc: " + retDoc.getContentAsString ());
>>>
>>>   XmlDocument retDoc = BerkContainer.getDocument(docId);
>>>
>>>   XmlValue docValue = new XmlValue(retDoc);
>>>              System.out.println("DEBUG docValue asString: " +  
>>> docValue.asString());
>>>                          BerkModifier.execute( docValue, context,  
>>> BerkUpdContext);
>>>              XmlDocument retDoc2 = BerkContainer.getDocument 
>>> (docId); // +
>>> String.valueOf(intDocId));
>>>              System.out.println("DEBUG docValue ret2: " +
>>> retDoc2.getContentAsString());
>>>   }
>>>
>>> ...
>>>
>>>
>>> The problem is that the document will not be modified. The line
>>> System.out.println("DEBUG retdoc: " + retDoc.getContentAsString());
>>>
>>> gives me the same output as
>>> System.out.println("DEBUG docValue ret2: " +  
>>> retDoc2.getContentAsString());.
>>>
>>> And a manual check with the console utility gives me of course the  
>>> same
>>> result.
>>>
>>>
>>>
>>> Any help is highly appreciated.
>>>
>>>
>>> Best regards,
>>>
>>>
>>> Stephan Korthoff
>>>
>>>
>>>
>>
>>
>>
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>>
>>
>
>
>
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