Re: [rules-users] Problem when using multiple rule files (Drools 5)

I create *.pkg file with the following app: -------------------------------------------------------------------------------------------------- import java.io.File; import java.io.FileOutputStream; import java.io.InputStreamReader; import java.io.ObjectOutputStream; import java.net.URL; import org.drools.RuleBase; import org.drools.RuleBaseFactory; import org.drools.WorkingMemory; import org.drools.rule.Package; import org.drools.compiler.PackageBuilder; public class DroolsPackageWriter { String[] fileNames = { "rulefile1", "rulefile2"}; public void readWritePackages() { for(int i = 0; i < fileNames.length; i++) { try { RuleBase ruleBase = RuleBaseFactory.newRuleBase(); PackageBuilder builder = new PackageBuilder(); String ruleFile = fileNames[i] + ".drl"; System.out.println("Lese:"+ ruleFile); builder.addPackageFromDrl(new InputStreamReader(DroolsPackageWriter.class.getResourceAsStream(ruleFile)));

Package pkg = builder.getPackage(); ruleBase.addPackage(pkg); WorkingMemory workingMemory = ruleBase.newStatefulSession(); workingMemory.fireAllRules(); URL url = DroolsPackageWriter.class.getResource(ruleFile); String file = url.getPath().replaceAll("%20"," ").replaceAll(".drl", ".pkg"); File f = new File(file); pkg.writeExternal(new ObjectOutputStream(new FileOutputStream(f))); System.out.println("geschrieben:"+ file); } catch(Exception ex) { ex.printStackTrace(); } } } /** * @param args */ public static void main(String[] args) { DroolsPackageWriter dpw = new DroolsPackageWriter(); dpw.readWritePackages(); } } -------------------------------------------------------------------------------------------------- I the app where i read the *.pkg files the code looks like this: --------------------------------------------------------------- String[] rules = new String[]{"rule1.pkg","rule2.pkg" };

for (int i = 0; i < rules.length; i++) { String ruleFile = rules[i]; log.debug("Loading file: " + ruleFile); pkg = new Package(); pkg.readExternal(new ObjectInputStream(this.getClass().getResourceAsStream(ruleFile))); ruleBase.addPackage(pkg); } WorkingMemory workingMemory = ruleBase.newStatefulSession(); setGlobals(workingMemory); Object[] facts = { /* anything you want */}; for (int i = 0; i < facts.length; i++) { Object fact = facts[i]; log.debug("Inserting fact: " + fact); try { workingMemory.insert(fact); } catch(NullPointerException npe) { System.out.println("NPE bei Fact:"+fact); npe.printStackTrace(); } } workingMemory.fireAllRules(); log.debug("END: runRules()"); } --------------------------------------------------------------- Hope this helps - to help me ! Wolfgang Laun-2 wrote: > > On 7/23/09, Olaf Raether <o.raether(a)epro.de&gt; wrote: >> >> The code looks like this: >> >> RuleBase ruleBase = RuleBaseFactory.newRuleBase(); >> for (int i = 0; i < rules.length; i++) { >> Package pkg = getPackage(i); >> ruleBase.addPackage(pkg); >> } > > > I'd expect to find "Package pkg = rules[i];" or similar in the loop. > Anyway, this doesn't tell how the Package objects were created from your > two > rules files, which might be significant. > > Do you check for package build errors? > > -W > > > for (int i = 0; i < facts.length; i++) { >> Object fact = facts[i]; >> workingMemory.insert(fact); // <<<<< Exception, when multiple >> rule >> files >> } >> >> > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- View this message in context: http://www.nabble.com/Problem-when-using-multiple-rule-files-%28Drools-5%... Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users