issue #39: add method to get registered listeners

easyrules-core/src/main/java/org/easyrules/api/RulesEngine.java

@@ -24,6 +24,7 @@
 
 package org.easyrules.api;
 
+import java.util.List;
 import java.util.Set;
 import org.easyrules.core.RulesEngineParameters;
 
@@ -62,6 +63,13 @@ public interface RulesEngine {
      */
     Set<Rule> getRules();
 
+    /**
+     * Return the list of registered rule listeners.
+     *
+     * @return the list of registered rule listeners
+     */
+    List<RuleListener> getRuleListeners();
+
     /**
      * Fire all registered rules.
      */

easyrules-core/src/main/java/org/easyrules/core/DefaultRulesEngine.java

@@ -94,6 +94,11 @@ class DefaultRulesEngine implements RulesEngine {
         return rules;
     }
 
+    @Override
+    public List<RuleListener> getRuleListeners() {
+        return ruleListeners;
+    }
+
     @Override
     public void clearRules() {
         rules.clear();

easyrules-core/src/test/java/org/easyrules/core/DefaultRulesEngineTest.java

@@ -4,6 +4,7 @@ import org.easyrules.annotation.Action;
 import org.easyrules.annotation.Condition;
 import org.easyrules.annotation.Priority;
 import org.easyrules.annotation.Rule;
+import org.easyrules.api.RuleListener;
 import org.easyrules.api.RulesEngine;
 import org.junit.After;
 import org.junit.Before;
@@ -29,6 +30,9 @@ public class DefaultRulesEngineTest {
     @Mock
     private BasicRule rule, anotherRule;
 
+    @Mock
+    private RuleListener ruleListener;
+
     private AnnotatedRule annotatedRule;
 
     private RulesEngine rulesEngine;
@@ -124,6 +128,16 @@ public class DefaultRulesEngineTest {
                 .containsExactly(rule, anotherRule);
     }
 
+    @Test
+    public void testGetRuleListeners() throws Exception {
+        rulesEngine = aNewRulesEngine()
+                .withRuleListener(ruleListener)
+                .build();
+
+        assertThat(rulesEngine.getRuleListeners())
+                .containsExactly(ruleListener);
+    }
+
     @After
     public void clearRules() {
         rulesEngine.clearRules();