profilerservlet.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 431 行

JAVA
431 行
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/* * Copyright (c) 1998-2005 Caucho Technology -- all rights reserved * * This file is part of Resin(R) Open Source * * Each copy or derived work must preserve the copyright notice and this * notice unmodified. * * Resin Open Source is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Resin Open Source is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty * of NON-INFRINGEMENT.  See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with Resin Open Source; if not, write to the *   Free SoftwareFoundation, Inc. *   59 Temple Place, Suite 330 *   Boston, MA 02111-1307  USA * * @author Sam */package com.caucho.tools.profiler;import com.caucho.util.CharBuffer;import com.caucho.util.L10N;import com.caucho.util.Sprintf;import com.caucho.vfs.XmlWriter;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.util.*;/** * Html interface to profiling information. */public class ProfilerServlet  extends HttpServlet{  private static final L10N L = new L10N(ProfilerServlet.class);  // can do this because an instance of Filter is created for each environment  private final ProfilerManager _profilerManager = ProfilerManager.getLocal();  public ProfilerManager createProfiler()  {    return _profilerManager;  }  public void init()  {  }  protected void doGet(HttpServletRequest req, HttpServletResponse res)    throws ServletException, IOException  {    handleRequest(req, res);    handleResponse(req, res);  }  protected void doPost(HttpServletRequest req, HttpServletResponse res)    throws ServletException, IOException  {    handleRequest(req, res);    handleResponse(req, res);  }  protected void handleRequest(HttpServletRequest request,                               HttpServletResponse response)    throws ServletException, IOException  {  }  protected void handleResponse(HttpServletRequest request,                                HttpServletResponse response)    throws ServletException, IOException  {    String format = request.getParameter("format");    boolean isXml = "xml".equals(format);        response.setContentType("text/html");    response.setHeader("Cache-Control", "no-cache, post-check=0, pre-check=0");    response.setHeader("Pragma", "no-cache");    response.setHeader("Expires", "Thu, 01 Dec 1994 16:00:00 GMT");    if (isXml)      writeXml(request, response);    else      writeHtml(request, response);  }  protected void writeHtml(HttpServletRequest request,			   HttpServletResponse response)    throws ServletException, IOException  {    response.setContentType("text/html");    String sort = request.getParameter("sort");    ProfilerNodeComparator comparator;    if ("count".equals(sort))      comparator = new CountComparator();    else      comparator = new TimeComparator();    comparator.setDescending(true);    XmlWriter out = new XmlWriter(response.getWriter());    out.setStrategy(XmlWriter.HTML);    out.setIndenting(false);    out.println(      "<!DOCTYPE html  PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"  \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">");    String contextPath = request.getContextPath();    if (contextPath == null || contextPath.length() == 0)      contextPath = "/";    String title = L.l("Profiling Results for {0}", contextPath);    out.startElement("html");    out.startElement("head");    out.writeElement("title", title);    out.startElement("style");    out.writeAttribute("type", "text/css");    out.println(      "h1 { background: #ccddff; margin : 0 -0.5em 0.25em -0.25em; padding: 0.25em 0.25em; }");    out.println(      "h2 { background: #ccddff; padding: 0.25em 0.5em; margin : 0.5em -0.5em; }");    out.println("table { border-collapse : collapse; }");    out.println("th { background : #c78ae6; border-left : 1px; border-right : 1px}");    out.println("tr { border-bottom : 1px dotted; }");    out.println(".number { text-align : right; }");    out.println("table table tr { border-bottom : none; }");    out.endElement("style");    out.endElement("head");    out.startElement("body");    out.writeElement("h1", title);    out.startElement("table");    out.writeAttribute("border", 0);    out.startElement("tr");    out.writeLineElement("th", L.l("Name"));    out.writeLineElement("th", L.l("Average Time"));    out.writeLineElement("th", L.l("Min Time"));    out.writeLineElement("th", L.l("Max Time"));    out.writeLineElement("th", L.l("Total Time"));    out.writeLineElement("th", L.l("Invocation Count"));    out.endElement("tr");    ProfilerPoint root = _profilerManager.getRoot();        List<ProfilerPoint> children = root.getChildren();    Collections.sort(children, comparator);    for (ProfilerPoint child : children)      display(child, comparator, out, 0);    out.endElement("table");    out.endElement("body");    out.endElement("html");  }  private void display(ProfilerPoint node,                       ProfilerNodeComparator comparator,                       XmlWriter out,                       int depth)  {    if (node == null)      return;        List<ProfilerPoint> children = node.getChildren();    Collections.sort(children, comparator);    long thisTime = node.getTime();    long minTime = node.getMinTime();    long maxTime = node.getMaxTime();    long childrenTime = 0;    for (ProfilerPoint child : children) {      childrenTime += child.getTime();    }    long totalTime = childrenTime + thisTime;    long invocationCount = node.getInvocationCount();    long averageThisTime;    long averageTotalTime;    long averageChildrenTime;    if (invocationCount <= 0) {      averageThisTime = -1;      averageTotalTime = -1;      averageChildrenTime = -1;    }    else {      averageThisTime = thisTime / invocationCount;      averageTotalTime = totalTime / invocationCount;      averageChildrenTime = childrenTime / invocationCount;    }    out.startElement("tr");    out.writeAttribute("class", "level" + depth);    // Name    out.startLineElement("td");    out.startElement("table");    out.startElement("tr");    out.startLineElement("td");    if (depth > 0) {      for (int i = depth; i > 0; i--) {        out.write("&nbsp;");        out.write("&nbsp;");      }      out.write("&rarr;");    }    out.endLineElement("td");    out.startLineElement("td");    out.writeAttribute("class", "text");    out.writeText(node.getName());    out.endLineElement("td");    out.endElement("tr");    out.endElement("table");    out.endLineElement("td");    out.startLineElement("td");    out.writeAttribute("class", "number");    if (averageThisTime < 0)      out.write("&nbsp;");    else {      String averageTimeString = createTimeString(averageTotalTime, averageThisTime, averageChildrenTime);      out.writeAttribute("title", averageTimeString);      printTime(out, averageTotalTime);    }    out.endLineElement("td");    out.startLineElement("td");    out.writeAttribute("class", "number");    if (minTime < Long.MAX_VALUE)      printTime(out, minTime);    else      out.print("&nbsp;");    out.endLineElement("td");    out.startLineElement("td");    out.writeAttribute("class", "number");    if (Long.MIN_VALUE < maxTime)      printTime(out, maxTime);    else      out.print("&nbsp;");    out.endLineElement("td");    out.startLineElement("td");    out.writeAttribute("class", "number");    String timeString = createTimeString(totalTime, thisTime, childrenTime);    out.writeAttribute("title", timeString);    printTime(out, totalTime);    out.endLineElement("td");    out.startLineElement("td");    out.writeAttribute("class", "number");    out.print(invocationCount);    out.endLineElement("td");    out.endElement("tr");    // All children        for (ProfilerPoint child : children)      display(child, comparator, out, depth + 1);  }  protected void writeXml(HttpServletRequest request,			   HttpServletResponse response)    throws ServletException, IOException  {    ProfilerNodeComparator comparator = new TimeComparator();    comparator.setDescending(true);    XmlWriter out = new XmlWriter(response.getWriter());    out.setStrategy(XmlWriter.XML);    out.setIndenting(false);    String contextPath = request.getContextPath();    if (contextPath == null || contextPath.length() == 0)      contextPath = "/";    out.startElement("profile");    out.writeLineElement("name", contextPath);    List<ProfilerPoint> children      = _profilerManager.getRoot().getChildren();    Collections.sort(children, comparator);    for (ProfilerPoint child : children)      displayXml(child, comparator, out);    out.endElement("profile");  }  private void displayXml(ProfilerPoint node,			  ProfilerNodeComparator comparator,			  XmlWriter out)  {    List<ProfilerPoint> children = node.getChildren();    Collections.sort(children, comparator);    long thisTime = node.getTime();    long minTime = node.getMinTime();    long maxTime = node.getMaxTime();    long childrenTime = 0;    for (ProfilerPoint child : children) {      childrenTime += child.getTime();    }    long totalTime = childrenTime + thisTime;    long invocationCount = node.getInvocationCount();    out.startBlockElement("node");    out.writeLineElement("name", node.getName());    if (minTime < Long.MAX_VALUE)      out.writeLineElement("min-time", String.valueOf(minTime));    else      out.writeLineElement("min-time", "0");    if (maxTime >= 0)      out.writeLineElement("max-time", String.valueOf(maxTime));    else      out.writeLineElement("max-time", "0");    out.writeLineElement("time", String.valueOf(thisTime));    out.writeLineElement("total-time", String.valueOf(totalTime));    out.writeLineElement("children-time", String.valueOf(childrenTime));    out.writeLineElement("count", String.valueOf(invocationCount));    for (ProfilerPoint child : children)      displayXml(child, comparator, out);        out.endBlockElement("node");  }  private String createTimeString(long totalTime,                                  long thisTime,                                  long childrenTime)  {    CharBuffer cb = new CharBuffer();    cb.append("totalTime=");    formatTime(cb, totalTime);    cb.append(" thisTime=");    formatTime(cb, thisTime);    cb.append(" childrenTime=");    formatTime(cb, childrenTime);    return cb.toString();  }  private void printTime(XmlWriter out, long time)  {    CharBuffer cb = new CharBuffer();    formatTime(cb, time);    out.writeText(cb.toString());  }  private void formatTime(CharBuffer cb, long nanoseconds)  {    long milliseconds = nanoseconds / 1000000;    long minutes = milliseconds /  1000 / 60;    if (minutes > 0) {      Sprintf.sprintf(cb, "%d:", minutes);      milliseconds -= minutes * 60 * 1000;    }    long seconds = milliseconds /  1000;    if (minutes > 0)      Sprintf.sprintf(cb, "%02d.", seconds);    else      Sprintf.sprintf(cb, "%d.", seconds);    milliseconds -= seconds * 1000;    Sprintf.sprintf(cb, "%03d", milliseconds);  }}

profilerservlet.java - 源码说明

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