Mercurial Hosting > nabble
diff src/nabble/view/web/tools/Profile.jtp @ 0:7ecd1a4ef557
add content
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Thu, 21 Mar 2019 19:15:52 -0600 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/nabble/view/web/tools/Profile.jtp Thu Mar 21 19:15:52 2019 -0600 @@ -0,0 +1,139 @@ +<% +package nabble.view.web.tools; + +import com.yourkit.api.Controller; +import com.yourkit.api.ProfilingModes; +import fschmidt.util.java.HtmlUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import javax.servlet.ServletException; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import java.io.IOException; +import java.io.PrintWriter; + + +public final class Profile extends HttpServlet { + + private static final Logger logger = LoggerFactory.getLogger(Profile.class); + + private static Controller profiler; + static { + try { + profiler = new com.yourkit.api.Controller(); + } catch (Exception e) { + logger.info("Profiler error: " + e); + } + } + + protected void service(HttpServletRequest request,HttpServletResponse response) + throws ServletException, IOException + { + PrintWriter out = response.getWriter(); + + float oneMega = 1024f * 1024f; + float free = Runtime.getRuntime().freeMemory() / oneMega; + float total = Runtime.getRuntime().totalMemory() / oneMega; + float used = total - free; + + String action = request.getParameter("action"); + if ("gc".equals(action)) { + System.gc(); + response.sendRedirect("/tools/Profile.jtp"); + return; + } else if ("memory".equals(action)) { + String file; + try { + file = profiler.captureSnapshot(ProfilingModes.SNAPSHOT_WITH_HEAP); + } catch(Exception e) { + throw new RuntimeException(e); + } + response.sendRedirect("/tools/Profile.jtp?file="+HtmlUtils.urlEncode(file)); + return; + } else if ("cpu".equals(action)) { + long seconds = Long.valueOf( request.getParameter("seconds") ); + String file; + try { + profiler.startCPUProfiling(ProfilingModes.CPU_SAMPLING, null); + Thread.sleep(seconds*1000L); + profiler.stopCPUProfiling(); + file = profiler.captureSnapshot(ProfilingModes.SNAPSHOT_WITHOUT_HEAP); + } catch(Exception e) { + throw new RuntimeException(e); + } + response.sendRedirect("/tools/Profile.jtp?file="+HtmlUtils.urlEncode(file)); + return; + } + %> + <html> + <head> + <title>Profiler</title> + <style type="text/css"> + body { + font-family:Verdana, Arial, Serif; + font-size:.74em; + } + .gray { + background-color: #eeeeee; + padding: .5em; + margin: .5em; + font-size:100%; + } + </style> + </head> + <body> + <div> + <a href="/tools/">Tools</a> + </div> + <% + String file = request.getParameter("file"); + if( file != null ) { + %> + <div style="margin:1em .5em .5em;padding:.3em"> + <b>Snapshot File</b>: <%=file%> + </div> + <% + } + %> + <table class="gray"> + <tr> + <td class="row-label">Free Memory</td> + <td> + <%=String.format("%.2f",free)%> Mb + </td> + </tr> + <tr> + <td class="row-label">Used Memory</td> + <td><%=String.format("%.2f",used)%> Mb</td> + </tr> + <tr> + <td class="row-label">Total Memory</td> + <td><%=String.format("%.2f",total)%> Mb</td> + </tr> + </table> + <input type="button" onclick="location='/tools/Profile.jtp?action=gc'" value="Run GC"/> + <% if (profiler == null) { %> + <div style="margin:1em 0"> + Yourkit profiler is disabled on this server. + </div> + <% } else { %> + <div style="margin:1em 0"> + <input type="button" onclick="location='/tools/Profile.jtp?action=memory'" value="Capture Memory Snapshot"/> + </div> + <div style="margin:1em 0"> + <form> + <input type="hidden" name="action" value="cpu"> + <input type="text" name="seconds" value="5" size="2"> seconds + <input type="submit" value="CPU Profiling"> + </form> + </div> + <% } %> + </body> + </html> + <% + } + +} +%> \ No newline at end of file