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1
14 package wingset;
15
16 import org.wings.*;
17 import org.wings.event.SRenderEvent;
18 import org.wings.event.SRenderListener;
19 import org.wings.session.WingsStatistics;
20
21 import java.awt.event.ActionEvent  ;
22 import java.awt.event.ActionListener ;
23 import java.text.DecimalFormat ;
24
25
29 public class MemUsageExample extends WingSetPane {
30
31 private static final long SECOND = 1000;
32 private static final long MINUTE = 60 * SECOND;
33 private static final long HOUR = 60 * MINUTE;
34 private static final long DAY = 24 * HOUR;
35
36 private static final DecimalFormat megaByteFormatter = new DecimalFormat ("#.###");
37
38 private static final String getByteString(long bytes) {
39 if (bytes < 1024) {
40 return Long.toString(bytes);
41 }
43 if (bytes < 1024 * 1024) {
44 return Long.toString(bytes / (1024)) + "kB";
45 }
47 return megaByteFormatter.format(new Double (((double) bytes) / (1024 * 1024))) + "MB";
48
49 }
50
51 private static final String getUptimeString(long uptime) {
52 StringBuffer result = new StringBuffer ();
53
54 boolean doAppend = false;
55
56 if (uptime / DAY > 0) {
57 result.append(uptime / DAY).append("d ");
58 uptime %= DAY;
59 doAppend = true;
60 }
61
62 if (uptime / HOUR > 0 || doAppend) {
63 result.append(uptime / HOUR).append("h ");
64 uptime %= HOUR;
65 doAppend = true;
66 }
67
68 if (uptime / MINUTE > 0 || doAppend) {
69 result.append(uptime / MINUTE).append("m ");
70 uptime %= MINUTE;
71 doAppend = true;
72 }
73
74 if (uptime / SECOND > 0 || doAppend) {
75 result.append(uptime / SECOND).append("s ");
76 uptime %= SECOND;
77 }
78
79 result.append(uptime).append("ms");
80
81 return result.toString();
82 }
83
84 public SComponent createExample() {
85 final SButton gc = new SButton("gc");
86
87 final SProgressBar infoBar = new SProgressBar();
88 final SLabel totalMemory = new SLabel();
89 final SLabel freeMemory = new SLabel();
90 final SLabel usedMemory = new SLabel();
91 final SLabel overallSessions = new SLabel();
92 final SLabel activeSessions = new SLabel();
93 final SLabel uptime = new SLabel();
94 final SLabel requestCount = new SLabel();
95 final SPanel panel = new SPanel();
96
97 gc.addActionListener(new ActionListener () {
98 public void actionPerformed(ActionEvent e) {
99 System.gc();
100 }
101 });
102
103 SRenderListener renderListener = new SRenderListener() {
104 public void startRendering(SRenderEvent e) {
105 long free = Runtime.getRuntime().freeMemory();
106 long total = Runtime.getRuntime().totalMemory();
107
108 infoBar.setMaximum((int) total);
109 infoBar.setValue((int) (total - free));
110 infoBar.setString(getByteString(total - free));
111
112 totalMemory.setText(getByteString(total));
113 freeMemory.setText(getByteString(free));
114 usedMemory.setText(getByteString(total - free));
115 overallSessions.setText(Integer.toString(WingsStatistics.getStatistics().getOverallSessionCount()));
116 activeSessions.setText(Integer.toString(WingsStatistics.getStatistics().getActiveSessionCount()));
117 requestCount.setText(Integer.toString(WingsStatistics.getStatistics().getRequestCount()));
118 uptime.setText(getUptimeString(WingsStatistics.getStatistics().getUptime()));
119 }
120
121 public void doneRendering(SRenderEvent e) {}
122 };
123 panel.addRenderListener(renderListener);
124
125
126 infoBar.setUnfilledColor(java.awt.Color.gray);
127 infoBar.setFilledColor(java.awt.Color.red);
128 infoBar.setForeground(java.awt.Color.red);
129 infoBar.setBorderColor(java.awt.Color.black);
130 infoBar.setStringPainted(true);
131 infoBar.setPreferredSize(new SDimension(200, 5));
132
133
134 try {
135 java.net.URL templateURL =
136 getSession().getServletContext().getResource("/templates/MemUsageExample.thtml");
137 STemplateLayout layout = new STemplateLayout(templateURL);
138 panel.setLayout(layout);
139 } catch (Exception ex) {
140 ex.printStackTrace();
141 }
142
143 panel.add(gc, "GC");
144 panel.add(infoBar, "InfoBar");
145 panel.add(totalMemory, "TotalMemory");
146 panel.add(freeMemory, "FreeMemory");
147 panel.add(usedMemory, "UsedMemory");
148 panel.add(activeSessions, "ActiveSessions");
149 panel.add(overallSessions, "OverallSessions");
150 panel.add(requestCount, "RequestCount");
151 panel.add(uptime, "Uptime");
152
153
154 return panel;
155 }
156
157
158 }
159
160
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