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1 <%
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2 package nabble.view.web.tools;
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3
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4 import com.yourkit.api.Controller;
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5 import com.yourkit.api.ProfilingModes;
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6 import fschmidt.util.java.HtmlUtils;
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7 import org.slf4j.Logger;
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8 import org.slf4j.LoggerFactory;
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9
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10 import javax.servlet.ServletException;
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11 import javax.servlet.http.HttpServlet;
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12 import javax.servlet.http.HttpServletRequest;
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13 import javax.servlet.http.HttpServletResponse;
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14 import java.io.IOException;
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15 import java.io.PrintWriter;
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16
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17
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18 public final class Profile extends HttpServlet {
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19
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20 private static final Logger logger = LoggerFactory.getLogger(Profile.class);
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21
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22 private static Controller profiler;
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23 static {
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24 try {
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25 profiler = new com.yourkit.api.Controller();
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26 } catch (Exception e) {
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27 logger.info("Profiler error: " + e);
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28 }
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29 }
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30
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31 protected void service(HttpServletRequest request,HttpServletResponse response)
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32 throws ServletException, IOException
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33 {
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34 PrintWriter out = response.getWriter();
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35
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36 float oneMega = 1024f * 1024f;
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37 float free = Runtime.getRuntime().freeMemory() / oneMega;
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38 float total = Runtime.getRuntime().totalMemory() / oneMega;
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39 float used = total - free;
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40
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41 String action = request.getParameter("action");
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42 if ("gc".equals(action)) {
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43 System.gc();
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44 response.sendRedirect("/tools/Profile.jtp");
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45 return;
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46 } else if ("memory".equals(action)) {
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47 String file;
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48 try {
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49 file = profiler.captureSnapshot(ProfilingModes.SNAPSHOT_WITH_HEAP);
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50 } catch(Exception e) {
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51 throw new RuntimeException(e);
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52 }
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53 response.sendRedirect("/tools/Profile.jtp?file="+HtmlUtils.urlEncode(file));
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54 return;
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55 } else if ("cpu".equals(action)) {
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56 long seconds = Long.valueOf( request.getParameter("seconds") );
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57 String file;
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58 try {
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59 profiler.startCPUProfiling(ProfilingModes.CPU_SAMPLING, null);
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60 Thread.sleep(seconds*1000L);
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61 profiler.stopCPUProfiling();
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62 file = profiler.captureSnapshot(ProfilingModes.SNAPSHOT_WITHOUT_HEAP);
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63 } catch(Exception e) {
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64 throw new RuntimeException(e);
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65 }
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66 response.sendRedirect("/tools/Profile.jtp?file="+HtmlUtils.urlEncode(file));
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67 return;
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68 }
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69 %>
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70 <html>
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71 <head>
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72 <title>Profiler</title>
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73 <style type="text/css">
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74 body {
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75 font-family:Verdana, Arial, Serif;
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76 font-size:.74em;
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77 }
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78 .gray {
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79 background-color: #eeeeee;
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80 padding: .5em;
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81 margin: .5em;
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82 font-size:100%;
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83 }
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84 </style>
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85 </head>
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86 <body>
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87 <div>
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88 <a href="/tools/">Tools</a>
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89 </div>
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90 <%
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91 String file = request.getParameter("file");
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92 if( file != null ) {
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93 %>
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94 <div style="margin:1em .5em .5em;padding:.3em">
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95 <b>Snapshot File</b>: <%=file%>
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96 </div>
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97 <%
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98 }
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99 %>
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100 <table class="gray">
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101 <tr>
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102 <td class="row-label">Free Memory</td>
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103 <td>
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104 <%=String.format("%.2f",free)%> Mb
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105 </td>
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106 </tr>
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107 <tr>
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108 <td class="row-label">Used Memory</td>
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109 <td><%=String.format("%.2f",used)%> Mb</td>
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110 </tr>
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111 <tr>
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112 <td class="row-label">Total Memory</td>
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113 <td><%=String.format("%.2f",total)%> Mb</td>
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114 </tr>
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115 </table>
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116 <input type="button" onclick="location='/tools/Profile.jtp?action=gc'" value="Run GC"/>
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117 <% if (profiler == null) { %>
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118 <div style="margin:1em 0">
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119 Yourkit profiler is disabled on this server.
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120 </div>
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121 <% } else { %>
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122 <div style="margin:1em 0">
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123 <input type="button" onclick="location='/tools/Profile.jtp?action=memory'" value="Capture Memory Snapshot"/>
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124 </div>
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125 <div style="margin:1em 0">
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126 <form>
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127 <input type="hidden" name="action" value="cpu">
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128 <input type="text" name="seconds" value="5" size="2"> seconds
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129 <input type="submit" value="CPU Profiling">
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130 </form>
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131 </div>
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132 <% } %>
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133 </body>
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134 </html>
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135 <%
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136 }
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137
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138 }
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139 %> |
