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package org.eclipse.jetty.servlet;
// ========================================================================
// Copyright (c) 2008-2009 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.ContextHandler;
import org.eclipse.jetty.server.handler.StatisticsHandler;
import org.eclipse.jetty.util.log.Log;
public class StatisticsServlet extends HttpServlet
{
boolean _restrictToLocalhost = true; // defaults to true
private Server _server = null;
private StatisticsHandler _statsHandler;
private MemoryMXBean _memoryBean;
private Connector[] _connectors;
public void init() throws ServletException
{
_memoryBean = ManagementFactory.getMemoryMXBean();
ServletContext context = getServletContext();
ContextHandler.Context scontext = (ContextHandler.Context) context;
_server = scontext.getContextHandler().getServer();
Handler handler = _server.getChildHandlerByClass(StatisticsHandler.class);
if (handler != null)
{
_statsHandler = (StatisticsHandler) handler;
}
else
{
Log.info("Installing Statistics Handler");
_statsHandler = new StatisticsHandler();
_server.addHandler(_statsHandler);
}
_connectors = _server.getConnectors();
if (getInitParameter("restrictToLocalhost") != null)
{
_restrictToLocalhost = "true".equals(getInitParameter("restrictToLocalhost"));
}
}
public void doPost(HttpServletRequest sreq, HttpServletResponse sres) throws ServletException, IOException
{
doGet(sreq, sres);
}
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
{
if (_restrictToLocalhost)
{
if (!"127.0.0.1".equals(req.getRemoteAddr()))
{
resp.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
return;
}
}
if (req.getParameter("xml") != null && "true".equals(req.getParameter("xml")))
{
sendXmlResponse(resp);
} else
{
sendTextResponse(resp);
}
}
private void sendXmlResponse(HttpServletResponse response) throws IOException
{
StringBuilder sb = new StringBuilder();
sb.append("<statistics>\n");
sb.append(" <requests>\n");
sb.append(" <statsOnMs>").append(_statsHandler.getStatsOnMs()).append("</statsOnMs>\n");
sb.append(" <requests>").append(_statsHandler.getRequests()).append("</requests>\n");
sb.append(" <requestsTimedout>").append(_statsHandler.getRequestsTimedout()).append("</requestsTimedout>\n");
sb.append(" <requestsResumed>").append(_statsHandler.getRequestsResumed()).append("</requestsResumed>\n");
sb.append(" <requestsActive>").append(_statsHandler.getRequestsActive()).append("</requestsActive>\n");
sb.append(" <requestsActiveMin>").append(_statsHandler.getRequestsActiveMin()).append("</requestsActiveMin>\n");
sb.append(" <requestsActiveMax>").append(_statsHandler.getRequestsActiveMax()).append("</requestsActiveMax>\n");
sb.append(" <requestsDurationTotal>").append(_statsHandler.getRequestsDurationTotal()).append("</requestsDurationTotal>\n");
sb.append(" <requestsDurationAve>").append(_statsHandler.getRequestsDurationAve()).append("</requestsDurationAve>\n");
sb.append(" <requestsDurationMin>").append(_statsHandler.getRequestsDurationMin()).append("</requestsDurationMin>\n");
sb.append(" <requestsDurationMax>").append(_statsHandler.getRequestsDurationMax()).append("</requestsDurationMax>\n");
sb.append(" <requestsActiveDurationAve>").append(_statsHandler.getRequestsActiveDurationAve()).append("</requestsActiveDurationAve>\n");
sb.append(" <requestsActiveDurationMin>").append(_statsHandler.getRequestsActiveDurationMin()).append("</requestsActiveDurationMin>\n");
sb.append(" <requestsActiveDurationMax>").append(_statsHandler.getRequestsActiveDurationMax()).append("</requestsActiveDurationMax>\n");
sb.append(" </requests>\n");
sb.append(" <responses>\n");
sb.append(" <responses1xx>").append(_statsHandler.getResponses1xx()).append("</responses1xx>\n");
sb.append(" <responses2xx>").append(_statsHandler.getResponses2xx()).append("</responses2xx>\n");
sb.append(" <responses3xx>").append(_statsHandler.getResponses3xx()).append("</responses3xx>\n");
sb.append(" <responses4xx>").append(_statsHandler.getResponses4xx()).append("</responses4xx>\n");
sb.append(" <responses5xx>").append(_statsHandler.getResponses5xx()).append("</responses5xx>\n");
sb.append(" <responsesBytesTotal>").append(_statsHandler.getResponsesBytesTotal()).append("</responsesBytesTotal>\n");
sb.append(" </responses>\n");
sb.append(" <connections>\n");
for (Connector connector : _connectors)
{
sb.append(" <connector>\n");
sb.append(" <name>").append(connector.getName()).append("</name>\n");
sb.append(" <statsOn>").append(connector.getStatsOn()).append("</statsOn>\n");
if (connector.getStatsOn())
{
sb.append(" <statsOnMs>").append(connector.getStatsOnMs()).append("</statsOnMs>\n");
sb.append(" <connections>").append(connector.getConnections()).append("</connections>\n");
sb.append(" <connectionsOpen>").append(connector.getConnectionsOpen()).append("</connectionsOpen>\n");
sb.append(" <connectionsOpenMin>").append(connector.getConnectionsOpenMin()).append("</connectionsOpenMin>\n");
sb.append(" <connectionsOpenMax>").append(connector.getConnectionsOpenMax()).append("</connectionsOpenMax>\n");
sb.append(" <connectionsDurationTotal>").append(connector.getConnectionsDurationTotal()).append("</connectionsDurationTotal>\n");
sb.append(" <connectionsDurationAve>").append(connector.getConnectionsDurationAve()).append("</connectionsDurationAve>\n");
sb.append(" <connectionsDurationMin>").append(connector.getConnectionsDurationMin()).append("</connectionsDurationMin>\n");
sb.append(" <connectionsDurationMax>").append(connector.getConnectionsDurationMax()).append("</connectionsDurationMax>\n");
sb.append(" <requests>").append(connector.getRequests()).append("</requests>\n");
sb.append(" <connectionsRequestsAve>").append(connector.getConnectionsRequestsAve()).append("</connectionsRequestsAve>\n");
sb.append(" <connectionsRequestsMin>").append(connector.getConnectionsRequestsMin()).append("</connectionsRequestsMin>\n");
sb.append(" <connectionsRequestsMax>").append(connector.getConnectionsRequestsMax()).append("</connectionsRequestsMax>\n");
}
sb.append(" </connector>\n");
}
sb.append(" </connections>\n");
sb.append(" <memory>\n");
sb.append(" <heapMemoryUsage>").append(_memoryBean.getHeapMemoryUsage().getUsed()).append("</heapMemoryUsage>\n");
sb.append(" <nonHeapMemoryUsage>").append(_memoryBean.getNonHeapMemoryUsage().getUsed()).append("</nonHeapMemoryUsage>\n");
sb.append(" </memory>\n");
sb.append("</statistics>\n");
response.setContentType("text/xml");
PrintWriter pout = null;
pout = response.getWriter();
pout.write(sb.toString());
}
private void sendTextResponse(HttpServletResponse response) throws IOException
{
StringBuilder sb = new StringBuilder();
sb.append("<h1>Statistics:</h1>\n");
sb.append("<h2>Requests:</h2>\n");
sb.append("Statistics gathering started " + _statsHandler.getStatsOnMs() + "ms ago").append("<br />\n");
sb.append("Total requests: " + _statsHandler.getRequests()).append("<br />\n");
sb.append("Total requests timed out: " + _statsHandler.getRequestsTimedout()).append("<br />\n");
sb.append("Total requests resumed: " + _statsHandler.getRequestsResumed()).append("<br />\n");
sb.append("Current requests active: " + _statsHandler.getRequestsActive()).append("<br />\n");
sb.append("Min concurrent requests active: " + _statsHandler.getRequestsActiveMin()).append("<br />\n");
sb.append("Max concurrent requests active: " + _statsHandler.getRequestsActiveMax()).append("<br />\n");
sb.append("Total requests duration: " + _statsHandler.getRequestsDurationTotal()).append("<br />\n");
sb.append("Average request duration: " + _statsHandler.getRequestsDurationAve()).append("<br />\n");
sb.append("Min request duration: " + _statsHandler.getRequestsDurationMin()).append("<br />\n");
sb.append("Max request duration: " + _statsHandler.getRequestsDurationMax()).append("<br />\n");
sb.append("Average request active duration: " + _statsHandler.getRequestsActiveDurationAve()).append("<br />\n");
sb.append("Min request active duration: " + _statsHandler.getRequestsActiveDurationMin()).append("<br />\n");
sb.append("Max request active duration: " + _statsHandler.getRequestsActiveDurationMax()).append("<br />\n");
sb.append("<h2>Responses:</h2>\n");
sb.append("1xx responses: " + _statsHandler.getResponses1xx()).append("<br />\n");
sb.append("2xx responses: " + _statsHandler.getResponses2xx()).append("<br />\n");
sb.append("3xx responses: " + _statsHandler.getResponses3xx()).append("<br />\n");
sb.append("4xx responses: " + _statsHandler.getResponses4xx()).append("<br />\n");
sb.append("5xx responses: " + _statsHandler.getResponses5xx()).append("<br />\n");
sb.append("Bytes sent total: " + _statsHandler.getResponsesBytesTotal()).append("<br />\n");
sb.append("<h2>Connections:</h2>\n");
for (Connector connector : _connectors)
{
sb.append("<h3>" + connector.getName() + "</h3>");
if (connector.getStatsOn())
{
sb.append("Statistics gathering started " + connector.getStatsOnMs() + "ms ago").append("<br />\n");
sb.append("Total connections: " + connector.getConnections()).append("<br />\n");
sb.append("Current connections open: " + connector.getConnectionsOpen());
sb.append("Min concurrent connections open: " + connector.getConnectionsOpenMin()).append("<br />\n");
sb.append("Max concurrent connections open: " + connector.getConnectionsOpenMax()).append("<br />\n");
sb.append("Total connections duration: " + connector.getConnectionsDurationTotal()).append("<br />\n");
sb.append("Average connection duration: " + connector.getConnectionsDurationAve()).append("<br />\n");
sb.append("Min connection duration: " + connector.getConnectionsDurationMin()).append("<br />\n");
sb.append("Max connection duration: " + connector.getConnectionsDurationMax()).append("<br />\n");
sb.append("Total requests: " + connector.getRequests()).append("<br />\n");
sb.append("Average requests per connection: " + connector.getConnectionsRequestsAve()).append("<br />\n");
sb.append("Min requests per connection: " + connector.getConnectionsRequestsMin()).append("<br />\n");
sb.append("Max requests per connection: " + connector.getConnectionsRequestsMax()).append("<br />\n");
}
else
{
sb.append("Statistics gathering off.\n");
}
}
sb.append("<h2>Memory:</h2>\n");
sb.append("Heap memory usage: " + _memoryBean.getHeapMemoryUsage().getUsed() + " bytes").append("<br />\n");
sb.append("Non-heap memory usage: " + _memoryBean.getNonHeapMemoryUsage().getUsed() + " bytes").append("<br />\n");
response.setContentType("text/html");
PrintWriter pout = null;
pout = response.getWriter();
pout.write(sb.toString());
}
}
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