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comparison src/nabble/view/web/tools/Profile.jtp @ 0:7ecd1a4ef557

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author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 21 Mar 2019 19:15:52 -0600
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-1:000000000000 0:7ecd1a4ef557
1 <%
2 package nabble.view.web.tools;
3
4 import com.yourkit.api.Controller;
5 import com.yourkit.api.ProfilingModes;
6 import fschmidt.util.java.HtmlUtils;
7 import org.slf4j.Logger;
8 import org.slf4j.LoggerFactory;
9
10 import javax.servlet.ServletException;
11 import javax.servlet.http.HttpServlet;
12 import javax.servlet.http.HttpServletRequest;
13 import javax.servlet.http.HttpServletResponse;
14 import java.io.IOException;
15 import java.io.PrintWriter;
16
17
18 public final class Profile extends HttpServlet {
19
20 private static final Logger logger = LoggerFactory.getLogger(Profile.class);
21
22 private static Controller profiler;
23 static {
24 try {
25 profiler = new com.yourkit.api.Controller();
26 } catch (Exception e) {
27 logger.info("Profiler error: " + e);
28 }
29 }
30
31 protected void service(HttpServletRequest request,HttpServletResponse response)
32 throws ServletException, IOException
33 {
34 PrintWriter out = response.getWriter();
35
36 float oneMega = 1024f * 1024f;
37 float free = Runtime.getRuntime().freeMemory() / oneMega;
38 float total = Runtime.getRuntime().totalMemory() / oneMega;
39 float used = total - free;
40
41 String action = request.getParameter("action");
42 if ("gc".equals(action)) {
43 System.gc();
44 response.sendRedirect("/tools/Profile.jtp");
45 return;
46 } else if ("memory".equals(action)) {
47 String file;
48 try {
49 file = profiler.captureSnapshot(ProfilingModes.SNAPSHOT_WITH_HEAP);
50 } catch(Exception e) {
51 throw new RuntimeException(e);
52 }
53 response.sendRedirect("/tools/Profile.jtp?file="+HtmlUtils.urlEncode(file));
54 return;
55 } else if ("cpu".equals(action)) {
56 long seconds = Long.valueOf( request.getParameter("seconds") );
57 String file;
58 try {
59 profiler.startCPUProfiling(ProfilingModes.CPU_SAMPLING, null);
60 Thread.sleep(seconds*1000L);
61 profiler.stopCPUProfiling();
62 file = profiler.captureSnapshot(ProfilingModes.SNAPSHOT_WITHOUT_HEAP);
63 } catch(Exception e) {
64 throw new RuntimeException(e);
65 }
66 response.sendRedirect("/tools/Profile.jtp?file="+HtmlUtils.urlEncode(file));
67 return;
68 }
69 %>
70 <html>
71 <head>
72 <title>Profiler</title>
73 <style type="text/css">
74 body {
75 font-family:Verdana, Arial, Serif;
76 font-size:.74em;
77 }
78 .gray {
79 background-color: #eeeeee;
80 padding: .5em;
81 margin: .5em;
82 font-size:100%;
83 }
84 </style>
85 </head>
86 <body>
87 <div>
88 <a href="/tools/">Tools</a>
89 </div>
90 <%
91 String file = request.getParameter("file");
92 if( file != null ) {
93 %>
94 <div style="margin:1em .5em .5em;padding:.3em">
95 <b>Snapshot File</b>: <%=file%>
96 </div>
97 <%
98 }
99 %>
100 <table class="gray">
101 <tr>
102 <td class="row-label">Free Memory</td>
103 <td>
104 <%=String.format("%.2f",free)%> Mb
105 </td>
106 </tr>
107 <tr>
108 <td class="row-label">Used Memory</td>
109 <td><%=String.format("%.2f",used)%> Mb</td>
110 </tr>
111 <tr>
112 <td class="row-label">Total Memory</td>
113 <td><%=String.format("%.2f",total)%> Mb</td>
114 </tr>
115 </table>
116 <input type="button" onclick="location='/tools/Profile.jtp?action=gc'" value="Run GC"/>
117 <% if (profiler == null) { %>
118 <div style="margin:1em 0">
119 Yourkit profiler is disabled on this server.
120 </div>
121 <% } else { %>
122 <div style="margin:1em 0">
123 <input type="button" onclick="location='/tools/Profile.jtp?action=memory'" value="Capture Memory Snapshot"/>
124 </div>
125 <div style="margin:1em 0">
126 <form>
127 <input type="hidden" name="action" value="cpu">
128 <input type="text" name="seconds" value="5" size="2"> seconds
129 <input type="submit" value="CPU Profiling">
130 </form>
131 </div>
132 <% } %>
133 </body>
134 </html>
135 <%
136 }
137
138 }
139 %>