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<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hey guys
(Drools newbie here)</span> <o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I'm
*attempting* to use the Drools/Smooks pipeline functionality to insert facts
into my knowledgebase and I'm having a little trouble figuring out exactly how
to do this. I've read the API docs for the 5.0.0.M5 and looked at the test
cases but I guess I'm still not quite getting it, so I'm hoping someone here
can point me in the right direction.</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I've got an
XML file defined basically like this:</span> <o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><submission></span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<facility></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<faccode>xxx</faccode></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
</facility></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<lineitem></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<acctcode>xxxx</acctcode></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<amount>999</amount></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<lineitem></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<lineitem></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<acctcode>xxxx</acctcode></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<amount>999</amount></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
<lineitem></span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><submission></span>
<o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Within the
XML file, there is 1 and only 1 "facility" node and multiple
"lineitem" nodes. I'd like to use the DroolsSmooks pipleline
functionality to use Smooks to insert 1 "facility" fact and multiple
"lineitem" facts into my knowledgbase.</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The code
I've written to do this is similar to the following (taken from sample test
code I've seen in the Drools source):</span><o:p></o:p></p>
<p style='margin-left:36.0pt'><span style='font-size:10.0pt;font-family:"Courier New"'>StatefulKnowledgeSession
ksession = kbase.newStatefulKnowledgeSession();</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>Action
executeResultHandler = PipelineFactory.newExecuteResultHandler();</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>KnowledgeRuntimeCommand
insertStage = PipelineFactory.newStatefulKnowledgeSessionInsert();</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>insertStage.setReceiver(executeResultHandler);</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>Smooks smooks = new
Smooks("smooks-config.xml");</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>Transformer
transformer = PipelineFactory.newSmooksFromSourceTransformer(smooks,
"root");</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>transformer.setReceiver(insertStage);</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>Pipeline pipeline =
PipelineFactory.newStatefulKnowledgeSessionPipeline(ksession);</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>pipeline.setReceiver(transformer);</span>
<br>
<span style='font-size:10.0pt;font-family:"Courier New"'>ResultHandlerImpl
resultHandler = new ResultHandlerImpl();</span> <br>
<span style='font-size:10.0pt;font-family:"Courier New"'>pipeline.insert(ResourceFactory.newClassPathResource("submission.xml"),
resultHandler );</span> <o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>While
stepping through the above code, the last line returns an NPE. I've tried
playing with the "Transformer transformer - PipeLineFactory…" line,
substituting "root" for something else and it goes into an infinite
loop. What is the purpose of the "root" value being set in this line?</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Can anyone
tell me if I'm even on the right track here, or am I misunderstanding what the
Smooks data loader can do for me?</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Regards, <o:p></o:p></span></p>
<p><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dave<o:p></o:p></span></p>
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