6675768: NoSuchElementException thrown in RequiredModelMBean when tracing enabled

Summary: Rewrite logging in RequiredModelMBean.addAttributeChangeNotificationListener
Reviewed-by: dfuchs

src/share/classes/javax/management/modelmbean/RequiredModelMBean.java

@@ -48,6 +48,7 @@ import java.util.logging.Level;
 import java.util.Map;
 import java.util.Set;
 
+import java.util.Vector;
 import javax.management.Attribute;
 import javax.management.AttributeChangeNotification;
 import javax.management.AttributeChangeNotificationFilter;
@@ -132,8 +133,6 @@ public class RequiredModelMBean
      * and operations will be executed */
     private Object managedResource = null;
 
-    private static final String currClass = "RequiredModelMBean";
-
     /* records the registering in MBeanServer */
     private boolean registered = false;
     private transient MBeanServer server = null;
@@ -2488,10 +2487,13 @@ public class RequiredModelMBean
         }
 
         if (MODELMBEAN_LOGGER.isLoggable(Level.FINER)) {
+            Vector<String> enabledAttrs = currFilter.getEnabledAttributes();
+            String s = (enabledAttrs.size() > 1) ?
+                        "[" + enabledAttrs.firstElement() + ", ...]" :
+                        enabledAttrs.toString();
             MODELMBEAN_LOGGER.logp(Level.FINER,
                     RequiredModelMBean.class.getName(), mth,
-                "Set attribute change filter to " +
-                currFilter.getEnabledAttributes().firstElement());
+                "Set attribute change filter to " + s);
         }
 
         attributeBroadcaster.addNotificationListener(inlistener,currFilter,

test/javax/management/modelmbean/LoggingExceptionTest.java

+/*
+ * @test
+ * @bug 6471865 6675768
+ * @summary DescriptorSupport constructors throw IAE when traces are enabled;
+ * RequiredModelMBean.addAttributeChangeNotificationListener throws exception
+ * when traces enabled and no attributes.
+ * @author Luis-Miguel Alventosa
+ * @author Paul Cheeseman
+ */
+
+import java.util.logging.ConsoleHandler;
+import java.util.logging.Handler;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javax.management.Notification;
+import javax.management.NotificationListener;
+import javax.management.modelmbean.DescriptorSupport;
+import javax.management.modelmbean.RequiredModelMBean;
+
+public class LoggingExceptionTest {
+    private static final String tests[] = new String[] {
+        "DescriptorSupport()",
+        "DescriptorSupport(int)",
+        "DescriptorSupport(String)",
+        "DescriptorSupport(String...)",
+        "DescriptorSupport(String[], Object[])",
+        "DescriptorSupport(DescriptorSupport)",
+        "RequiredModelMBean.addAttributeChangeNotificationListener",
+    };
+    public static void main(String[] args) {
+        Handler handler = new ConsoleHandler();
+        Logger logger = Logger.getLogger("javax.management.modelmbean");
+        logger.addHandler(handler);
+        logger.setLevel(Level.FINEST);
+        try {
+            for (int i = 0; i < tests.length; i++) {
+                System.out.println(">>> DescriptorSupportLoggingTest: Test Case " + i);
+                DescriptorSupport ds;
+                String msg = "Instantiate " + tests[i];
+                System.out.println(msg);
+                switch (i) {
+                    case 0:
+                        ds = new DescriptorSupport();
+                        break;
+                    case 1:
+                        ds = new DescriptorSupport(10);
+                        break;
+                    case 2:
+                        ds = new DescriptorSupport(new DescriptorSupport().toXMLString());
+                        break;
+                    case 3:
+                        ds = new DescriptorSupport("name1=value1", "name2=value2");
+                        break;
+                    case 4:
+                        ds = new DescriptorSupport(new String[] {"name"}, new Object[] {"value"});
+                        break;
+                    case 5:
+                        ds = new DescriptorSupport(new DescriptorSupport());
+                        break;
+                    case 6:
+                        RequiredModelMBean mbean = new RequiredModelMBean();
+                        NotificationListener nl = new NotificationListener() {
+                            public void handleNotification(Notification notification,
+                                                           Object handback) {}
+                        };
+                        mbean.addAttributeChangeNotificationListener(nl, null, null);
+                        break;
+                    default:
+                        throw new AssertionError();
+                }
+                System.out.println(msg + " OK");
+            }
+        } catch (Exception e) {
+            System.out.println("Got unexpected exception = " + e);
+            String msg = "Test FAILED!";
+            System.out.println(msg);
+            throw new IllegalArgumentException(msg);
+        }
+        System.out.println("Test PASSED!");
+    }
+}