BAEL-9161 Added forward chaining example (#18745)

* Added forward chaining example

* Updated pom

Author: thebaubau

drools/pom.xml

@@ -62,9 +62,9 @@
 
     <properties>
         <httpcore.version>4.4.16</httpcore.version>
-        <drools.version>9.44.0.Final</drools.version>
-        <poi.version>5.2.3</poi.version>
-        <optaplanner-core.version>8.32.0.Final</optaplanner-core.version>
+        <drools.version>10.1.0</drools.version>
+        <poi.version>5.4.1</poi.version>
+        <optaplanner-core.version>9.44.0.Final</optaplanner-core.version>
     </properties>
 
 </project>

drools/src/main/java/com/baeldung/drools/forward_chaining/ForwardChaining.java

@@ -0,0 +1,29 @@
+package com.baeldung.drools.forward_chaining;
+
+import com.baeldung.drools.config.DroolsBeanFactory;
+import com.baeldung.drools.model.Applicant;
+import com.baeldung.drools.model.SuggestedRole;
+import org.kie.api.runtime.KieSession;
+
+public class ForwardChaining {
+    public static void main(String[] args) {
+        ForwardChaining result = new ForwardChaining();
+        result.forwardChaining();
+    }
+
+private void forwardChaining() {
+    KieSession ksession = new DroolsBeanFactory().getKieSession();
+    Applicant applicant = new Applicant("Daniel", 38, 1_600_000.0, 11);
+    SuggestedRole suggestedRole = new SuggestedRole();
+
+    ksession.setGlobal("suggestedRole", suggestedRole);
+    ksession.insert(applicant);
+
+    int fired = ksession.fireAllRules();
+    System.out.println("Rules fired: " + fired);
+    System.out.println("Suggested role: " + suggestedRole.getRole());
+
+    ksession.dispose();
+}
+
+}

drools/src/main/resources/com/baeldung/drools/rules/SuggestApplicant.drl

@@ -14,7 +14,7 @@ rule "Suggest Manager Role"
         suggestedRole.setRole("Manager");
 end
 
-rule "Suggest Senior developer Role"
+rule "Suggest Senior Developer Role"
     when
         Applicant(experienceInYears > 5 && experienceInYears <= 10)
         Applicant(currentSalary > 500000 && currentSalary <= 1500000)