Merge pull request #5821 from rk1165/issue_5816

Fixes #5816 : JMX-ify Scheduler implementations

jetty-util/src/main/java/org/eclipse/jetty/util/thread/ScheduledExecutorScheduler.java

@@ -25,6 +25,8 @@
 import java.util.concurrent.atomic.AtomicInteger;
 
 import org.eclipse.jetty.util.StringUtil;
+import org.eclipse.jetty.util.annotation.ManagedAttribute;
+import org.eclipse.jetty.util.annotation.ManagedObject;
 import org.eclipse.jetty.util.annotation.Name;
 import org.eclipse.jetty.util.component.AbstractLifeCycle;
 import org.eclipse.jetty.util.component.Dumpable;
@@ -37,6 +39,7 @@
  * queue even if the task did not fire, which provides a huge benefit in the performance
  * of garbage collection in young generation.
  */
+@ManagedObject
 public class ScheduledExecutorScheduler extends AbstractLifeCycle implements Scheduler, Dumpable
 {
     private final String name;
@@ -154,4 +157,22 @@ public boolean cancel()
             return scheduledFuture.cancel(false);
         }
     }
+
+    @ManagedAttribute("The name of the scheduler")
+    public String getName()
+    {
+        return name;
+    }
+
+    @ManagedAttribute("Whether the scheduler uses daemon threads")
+    public boolean isDaemon()
+    {
+        return daemon;
+    }
+
+    @ManagedAttribute("The number of scheduler threads")
+    public int getThreads()
+    {
+        return threads;
+    }
 }