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comparison src/nabble/view/web/tools/Profile.java @ 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 out.print( "\n<html>\n <head>\n <title>Profiler</title>\n <style type=\"text/css\">\n body {\n font-family:Verdana, Arial, Serif;\n font-size:.74em;\n }\n .gray {\n background-color: #eeeeee;\n padding: .5em;\n margin: .5em;\n font-size:100%;\n }\n </style>\n </head>\n <body>\n <div>\n <a href=\"/tools/\">Tools</a>\n </div>\n " );
71
72 String file = request.getParameter("file");
73 if( file != null ) {
74
75 out.print( "\n<div style=\"margin:1em .5em .5em;padding:.3em\">\n <b>Snapshot File</b>: " );
76 out.print( (file) );
77 out.print( "\n</div>\n" );
78
79 }
80
81 out.print( "\n<table class=\"gray\">\n <tr>\n <td class=\"row-label\">Free Memory</td>\n <td>\n " );
82 out.print( (String.format("%.2f",free)) );
83 out.print( " Mb\n </td>\n </tr>\n <tr>\n <td class=\"row-label\">Used Memory</td>\n <td>" );
84 out.print( (String.format("%.2f",used)) );
85 out.print( " Mb</td>\n </tr>\n <tr>\n <td class=\"row-label\">Total Memory</td>\n <td>" );
86 out.print( (String.format("%.2f",total)) );
87 out.print( " Mb</td>\n </tr>\n</table>\n<input type=\"button\" onclick=\"location='/tools/Profile.jtp?action=gc'\" value=\"Run GC\"/>\n" );
88 if (profiler == null) {
89 out.print( "\n <div style=\"margin:1em 0\">\n Yourkit profiler is disabled on this server.\n </div>\n" );
90 } else {
91 out.print( "\n <div style=\"margin:1em 0\">\n <input type=\"button\" onclick=\"location='/tools/Profile.jtp?action=memory'\" value=\"Capture Memory Snapshot\"/>\n </div>\n <div style=\"margin:1em 0\">\n <form>\n <input type=\"hidden\" name=\"action\" value=\"cpu\">\n <input type=\"text\" name=\"seconds\" value=\"5\" size=\"2\"> seconds\n <input type=\"submit\" value=\"CPU Profiling\">\n </form>\n </div>\n" );
92 }
93 out.print( "\n</body>\n</html>\n" );
94
95 }
96
97 }
98