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6696975: JTop plugin fails if connected readonly to target JVM

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Reviewed-by: mchung, jbachorik, sla, sjiang
This commit is contained in:
Erik Gahlin 2013-10-01 17:48:01 +02:00
parent 7ee60c366e
commit 65580cea43
1 changed files with 48 additions and 5 deletions
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53
jdk/src/share/demo/management/JTop/JTop.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -87,12 +87,36 @@ import javax.swing.table.*;
*/
public class JTop extends JPanel {
private static class StatusBar extends JPanel {
private static final long serialVersionUID = -6483392381797633018L;
private final JLabel statusText;
public StatusBar(boolean defaultVisible) {
super(new GridLayout(1, 1));
statusText = new JLabel();
statusText.setVisible(defaultVisible);
add(statusText);
}
@Override
public Dimension getMaximumSize() {
Dimension maximum = super.getMaximumSize();
Dimension minimum = getMinimumSize();
return new Dimension(maximum.width, minimum.height);
}
public void setMessage(String text) {
statusText.setText(text);
statusText.setVisible(true);
}
}
private static final long serialVersionUID = -1499762160973870696L;
private MBeanServerConnection server;
private ThreadMXBean tmbean;
private MyTableModel tmodel;
private final StatusBar statusBar;
public JTop() {
super(new GridLayout(1,0));
super(new GridBagLayout());
tmodel = new MyTableModel();
JTable table = new JTable(tmodel);
@ -108,7 +132,22 @@ public class JTop extends JPanel {
JScrollPane scrollPane = new JScrollPane(table);
// Add the scroll pane to this panel.
add(scrollPane);
GridBagConstraints c1 = new GridBagConstraints();
c1.fill = GridBagConstraints.BOTH;
c1.gridy = 0;
c1.gridx = 0;
c1.weightx = 1;
c1.weighty = 1;
add(scrollPane, c1);
statusBar = new StatusBar(false);
GridBagConstraints c2 = new GridBagConstraints();
c2.fill = GridBagConstraints.HORIZONTAL;
c2.gridy = 1;
c2.gridx = 0;
c2.weightx = 1.0;
c2.weighty = 0.0;
add(statusBar, c2);
}
// Set the MBeanServerConnection object for communicating
@ -123,9 +162,13 @@ public class JTop extends JPanel {
e.printStackTrace();
}
if (!tmbean.isThreadCpuTimeSupported()) {
System.err.println("This VM does not support thread CPU time monitoring");
statusBar.setMessage("Monitored VM does not support thread CPU time measurement");
} else {
tmbean.setThreadCpuTimeEnabled(true);
try {
tmbean.setThreadCpuTimeEnabled(true);
} catch (SecurityException e) {
statusBar.setMessage("Monitored VM does not have permission for enabling thread cpu time measurement");
}
}
}