Do not resolve threadCount/daemonThreadCount asynchronously, update together with new thread data

Author: jisedlac

visualvm/applicationviews/src/org/graalvm/visualvm/application/views/threads/ApplicationThreadsView.java

@@ -260,23 +260,23 @@ public void actionPerformed(ActionEvent e) {
         private void updateThreadsCounts(final VisualVMThreadsDataManager threadsManager) {
 
             final int[] threads = new int[2];
-
-            getWorker().post(new Runnable() {
-                public void run() {
-                    try {
+            // TODO: needs a worker thread to read threadCount/daemonThreadCount?
+//            getWorker().post(new Runnable() {
+//                public void run() {
+//                    try {
                         threads[0] = threadsManager.getThreadCount();
                         threads[1] = threadsManager.getDaemonThreadCount();
-                    } catch (Exception ex) {
-                        threads[0] = 0;
-                        threads[1] = 0;
-                    }
+//                    } catch (Exception ex) {
+//                        threads[0] = 0;
+//                        threads[1] = 0;
+//                    }
                     SwingUtilities.invokeLater(new Runnable() {
                         public void run() {
                             updateThreadsCounts(threads[0], threads[1]);
                         }
                     });
-                }
-            });
+//                }
+//            });
         }
 
         private void setAlertText(String alert) {

visualvm/applicationviews/src/org/graalvm/visualvm/application/views/threads/ThreadMXBeanDataManager.java

@@ -56,6 +56,9 @@ class ThreadMXBeanDataManager extends VisualVMThreadsDataManager {
     private DeadlockDetector deadlockDetector;
     private PropertyChangeSupport changeSupport;
     private long[] deadlockThreadIds;
+    
+    private int threadCount, daemonThreadCount;
+    
 
     ThreadMXBeanDataManager(ThreadMXBean tb) {
         threadBean = tb;
@@ -90,6 +93,8 @@ void refreshThreadsSync() {
         try {
             ThreadMonitoredDataResponse resp = new ThreadMonitoredDataResponse();
             resp.fillInThreadData();
+            threadCount = threadBean.getThreadCount();
+            daemonThreadCount = threadBean.getDaemonThreadCount();
             final MonitoredData monitoredData = MonitoredData.getMonitoredData(resp);
             SwingUtilities.invokeLater(new Runnable() {
 
@@ -104,11 +109,11 @@ public void run() {
     }
 
     int getDaemonThreadCount() {
-        return threadBean.getDaemonThreadCount();
+        return daemonThreadCount;
     }
 
     int getThreadCount() {
-        return threadBean.getThreadCount();
+        return threadCount;
     }
 
     void addPropertyChangeListener(PropertyChangeListener l) {