Re: [rules-users] unmarshal global variable

Thanks for the response. The first rule table in the spreadsheet (kinda) looks like this: RuleTable Constants NAME CONDITION ACTION ACTION eval(! productPricer.isConstantsSet($1) ) productPricer.setConstant($1, $2); productPricer.setConstantsSet($1); Rule Name Set? ProductName TRUE "NAME", "Champion CL" DefaultCost TRUE "COST", "80000" DefaultPrice TRUE "PRICE", "100000" DefaultLength TRUE "LENGTH", "53" Done TRUE TRUE The first rule generated looks like this: rule "ProductName" when eval(! productPricer.isConstantsSet() ) then productPricer.setConstant("NAME", "Champion CL"); end Alex -----Original Message----- From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Wolfgang

Sent: Monday, January 07, 2013 11:22 AM To: Rules Users List Subject: Re: [rules-users] unmarshal global variable The crucial info is: what is in the first table, how do you insert

data? Is it a DRL global? A fact? How does the (generated) rule look like? -W On 07/01/2013, acormond <acormond(a)greatdanetrailers.com&gt; wrote: > Gentlepeople, > > I am fairly new to Drools and have what I hope is a simple question. I am > attempting to marshal (serialize) a Drools knowledge session and then > unmarshall it. The marshalling works but the unmarshalling fails

a > null pointer exception. The error is apparently with unmarshalling a > global > variable in the session. > > The session is created from a spreadsheet (decision table). This > spreadsheet > has two RuleTables. The first of these exists solely so that I can enter > some > constants into the session, specifically the name and price of the product > the > spreadsheet is dealing with. The second ruletable is where the rules are > specified. The exception occurs when unmarshalling the first rule in the > first > rule table. If, as a test, I eliminate the first rule table, then I can > successfully marshal and unmarshall the session. > > The marshalling is done using the following, simplified, code: > > Marshaller marshaller = MarshallerFactory.newMarshaller(kbase); > File droolsSessionFile = new File(MARSHAL_FILE); > foStream = new FileOutputStream(droolsSessionFile); > baos = new ByteArrayOutputStream(); > marshaller.marshall(baos, ksession); > baos.writeTo(foStream); > > and the unmarshalling is done like this: > > Marshaller marshaller = > MarshallerFactory.newMarshaller(pricingProcessor.getKnowledgeBase()); > FileInputStream fis = new FileInputStream(MARSHAL_FILE); > StatefulKnowledgeSession ksession = marshaller.unmarshall(fis); > > > So, where did I go wrong? Perhaps I need to deal with the global variable > differently, perhaps by putting it in the knowledgeBase before I unmarshall > the session? > > Thank you for any help. > > Alex Ormond > > > > > -- > View this message in context: >

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