skrueger/swing/HeapBar.java

package skrueger.swing;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Locale;
import java.util.Timer;
import java.util.TimerTask;

import javax.swing.JProgressBar;

import org.apache.log4j.Logger;

import schmitzm.lang.LangUtil;
import schmitzm.lang.ResourceProvider;
import schmitzm.swing.SwingUtil;
import skrueger.swing.formatter.MbDecimalFormatter;

public class HeapBar extends JProgressBar {
        private static final Logger LOGGER = Logger.getLogger(HeapBar.class);

        protected static ResourceProvider RESOURCE = new ResourceProvider(LangUtil
                        .extendPackagePath(SwingUtil.class,
                                        "resource.locales.SwingResourceBundle"), Locale.ENGLISH);

        private Timer updateTimer;
        String valueAsText = "";
        MbDecimalFormatter formatter = new MbDecimalFormatter();

        public HeapBar() {
                updateTimer = new Timer("check memory");
                updateTimer.scheduleAtFixedRate(new UpdateMemoryBarTask(), 1000, 5000);

                setMinimum(0);
                setMaximum(100);

                SwingUtil.setPreferredWidth(this, 200);
                
                // Clicking the bar triggers a GC
                addMouseListener( new MouseAdapter() {
                        @Override
                        public void mouseClicked(MouseEvent e) {
                                LangUtil.gcTotal();
                        }
                });
        }

        @Override
        protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                g.setColor(Color.black);
                g.drawString(valueAsText, 5, 12);
        }

        class UpdateMemoryBarTask extends TimerTask {

                @Override
                public void run() {

                        // Get current size of heap in bytes
                        long heapSize = Runtime.getRuntime().totalMemory();

                        // Get maximum size of heap in bytes. The heap cannot grow beyond
                        // this size.
                        // Any attempt will result in an OutOfMemoryException.
                        long heapMaxSize = Runtime.getRuntime().maxMemory();

                        // Get amount of free memory within the heap in bytes. This size
                        // will increase
                        // after garbage collection and decrease as new objects are created.
                        long heapFreeSize = Runtime.getRuntime().freeMemory();

                        long used = (heapSize - heapFreeSize);

                        int percentaUsed = (int) (used * 100 / heapMaxSize);

                        if (percentaUsed > 80)
                                LOGGER.warn(percentaUsed + "% belegt");

                        if (percentaUsed > 70) {
                                if (percentaUsed > 90)
                                        setForeground(Color.red);
                                else
                                        setForeground(Color.orange);
                        } else {
                                setForeground(Color.green);
                        }

                        setValue(percentaUsed);
                        valueAsText = RESOURCE.getString("HeapMemoryBar.status", formatter
                                        .format(used), percentaUsed, formatter.format(heapMaxSize));

                        repaint();
                }
        }
}
1	package skrueger.swing;
2
3	import java.awt.Color;
4	import java.awt.Graphics;
5	import java.awt.event.MouseAdapter;
6	import java.awt.event.MouseEvent;
7	import java.util.Locale;
8	import java.util.Timer;
9	import java.util.TimerTask;
10
11	import javax.swing.JProgressBar;
12
13	import org.apache.log4j.Logger;
14
15	import schmitzm.lang.LangUtil;
16	import schmitzm.lang.ResourceProvider;
17	import schmitzm.swing.SwingUtil;
18	import skrueger.swing.formatter.MbDecimalFormatter;
19
20	public class HeapBar extends JProgressBar {
21	private static final Logger LOGGER = Logger.getLogger(HeapBar.class);
22
23	protected static ResourceProvider RESOURCE = new ResourceProvider(LangUtil
24	.extendPackagePath(SwingUtil.class,
25	"resource.locales.SwingResourceBundle"), Locale.ENGLISH);
26
27	private Timer updateTimer;
28	String valueAsText = "";
29	MbDecimalFormatter formatter = new MbDecimalFormatter();
30
31	public HeapBar() {
32	updateTimer = new Timer("check memory");
33	updateTimer.scheduleAtFixedRate(new UpdateMemoryBarTask(), 1000, 5000);
34
35	setMinimum(0);
36	setMaximum(100);
37
38	SwingUtil.setPreferredWidth(this, 200);
39
40	// Clicking the bar triggers a GC
41	addMouseListener( new MouseAdapter() {
42	@Override
43	public void mouseClicked(MouseEvent e) {
44	LangUtil.gcTotal();
45	}
46	});
47	}
48
49	@Override
50	protected void paintComponent(Graphics g) {
51	super.paintComponent(g);
52	g.setColor(Color.black);
53	g.drawString(valueAsText, 5, 12);
54	}
55
56	class UpdateMemoryBarTask extends TimerTask {
57
58	@Override
59	public void run() {
60
61	// Get current size of heap in bytes
62	long heapSize = Runtime.getRuntime().totalMemory();
63
64	// Get maximum size of heap in bytes. The heap cannot grow beyond
65	// this size.
66	// Any attempt will result in an OutOfMemoryException.
67	long heapMaxSize = Runtime.getRuntime().maxMemory();
68
69	// Get amount of free memory within the heap in bytes. This size
70	// will increase
71	// after garbage collection and decrease as new objects are created.
72	long heapFreeSize = Runtime.getRuntime().freeMemory();
73
74	long used = (heapSize - heapFreeSize);
75
76	int percentaUsed = (int) (used * 100 / heapMaxSize);
77
78	if (percentaUsed > 80)
79	LOGGER.warn(percentaUsed + "% belegt");
80
81	if (percentaUsed > 70) {
82	if (percentaUsed > 90)
83	setForeground(Color.red);
84	else
85	setForeground(Color.orange);
86	} else {
87	setForeground(Color.green);
88	}
89
90	setValue(percentaUsed);
91	valueAsText = RESOURCE.getString("HeapMemoryBar.status", formatter
92	.format(used), percentaUsed, formatter.format(heapMaxSize));
93
94	repaint();
95	}
96	}
97	}
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