org.eclipse.jetty.servlet.StatisticsServlet Maven / Gradle / Ivy
// ========================================================================
// 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.
// ========================================================================
package org.eclipse.jetty.servlet;
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;
import org.eclipse.jetty.util.log.Logger;
public class StatisticsServlet extends HttpServlet
{
private static final Logger LOG = Log.getLogger(StatisticsServlet.class);
boolean _restrictToLocalhost = true; // defaults to true
private StatisticsHandler _statsHandler;
private MemoryMXBean _memoryBean;
private Connector[] _connectors;
public void init() throws ServletException
{
ServletContext context = getServletContext();
ContextHandler.Context scontext = (ContextHandler.Context) context;
Server _server = scontext.getContextHandler().getServer();
Handler handler = _server.getChildHandlerByClass(StatisticsHandler.class);
if (handler != null)
{
_statsHandler = (StatisticsHandler) handler;
}
else
{
LOG.warn("Statistics Handler not installed!");
return;
}
_memoryBean = ManagementFactory.getMemoryMXBean();
_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 (_statsHandler == null)
{
LOG.warn("Statistics Handler not installed!");
resp.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
return;
}
if (_restrictToLocalhost)
{
if (!"127.0.0.1".equals(req.getRemoteAddr()))
{
resp.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
return;
}
}
String wantXml = req.getParameter("xml");
if (wantXml == null)
wantXml = req.getParameter("XML");
if (wantXml != null && "true".equalsIgnoreCase(wantXml))
{
sendXmlResponse(resp);
}
else
{
sendTextResponse(resp);
}
}
private void sendXmlResponse(HttpServletResponse response) throws IOException
{
StringBuilder sb = new StringBuilder();
sb.append("\n");
sb.append(" \n");
sb.append(" ").append(_statsHandler.getStatsOnMs()).append(" \n");
sb.append(" ").append(_statsHandler.getRequests()).append(" \n");
sb.append(" ").append(_statsHandler.getRequestsActive()).append(" \n");
sb.append(" ").append(_statsHandler.getRequestsActiveMax()).append(" \n");
sb.append(" ").append(_statsHandler.getRequestTimeTotal()).append(" \n");
sb.append(" ").append(_statsHandler.getRequestTimeMean()).append(" \n");
sb.append(" ").append(_statsHandler.getRequestTimeMax()).append(" \n");
sb.append(" ").append(_statsHandler.getRequestTimeStdDev()).append(" \n");
sb.append(" ").append(_statsHandler.getDispatched()).append(" \n");
sb.append(" ").append(_statsHandler.getDispatchedActive()).append(" \n");
sb.append(" ").append(_statsHandler.getDispatchedActiveMax()).append(" \n");
sb.append(" ").append(_statsHandler.getDispatchedTimeTotal()).append(" \n");
sb.append(" \n");
sb.append(" ").append(_statsHandler.getDispatchedTimeMax()).append(" \n");
sb.append(" \n");
sb.append(" ").append(_statsHandler.getSuspends()).append(" \n");
sb.append(" ").append(_statsHandler.getExpires()).append(" \n");
sb.append(" ").append(_statsHandler.getResumes()).append(" \n");
sb.append(" \n");
sb.append(" \n");
sb.append(" ").append(_statsHandler.getResponses1xx()).append(" \n");
sb.append(" ").append(_statsHandler.getResponses2xx()).append(" \n");
sb.append(" ").append(_statsHandler.getResponses3xx()).append(" \n");
sb.append(" ").append(_statsHandler.getResponses4xx()).append(" \n");
sb.append(" ").append(_statsHandler.getResponses5xx()).append(" \n");
sb.append(" ").append(_statsHandler.getResponsesBytesTotal()).append(" \n");
sb.append(" \n");
sb.append(" \n");
for (Connector connector : _connectors)
{
sb.append(" \n");
sb.append(" ").append(connector.getName()).append(" \n");
sb.append(" ").append(connector.getStatsOn()).append(" \n");
if (connector.getStatsOn())
{
sb.append(" ").append(connector.getStatsOnMs()).append(" \n");
sb.append(" ").append(connector.getConnections()).append(" \n");
sb.append(" ").append(connector.getConnectionsOpen()).append(" \n");
sb.append(" ").append(connector.getConnectionsOpenMax()).append(" \n");
sb.append(" ").append(connector.getConnectionsDurationTotal()).append(" \n");
sb.append(" ").append(connector.getConnectionsDurationMean()).append(" \n");
sb.append(" ").append(connector.getConnectionsDurationMax()).append(" \n");
sb.append(" ").append(connector.getConnectionsDurationStdDev()).append(" \n");
sb.append(" ").append(connector.getRequests()).append(" \n");
sb.append(" ").append(connector.getConnectionsRequestsMean()).append(" \n");
sb.append(" ").append(connector.getConnectionsRequestsMax()).append(" \n");
sb.append(" ").append(connector.getConnectionsRequestsStdDev()).append(" \n");
}
sb.append(" \n");
}
sb.append(" \n");
sb.append(" \n");
sb.append(" ").append(_memoryBean.getHeapMemoryUsage().getUsed()).append(" \n");
sb.append(" ").append(_memoryBean.getNonHeapMemoryUsage().getUsed()).append(" \n");
sb.append(" \n");
sb.append(" \n");
response.setContentType("text/xml");
PrintWriter pout = response.getWriter();
pout.write(sb.toString());
}
private void sendTextResponse(HttpServletResponse response) throws IOException
{
StringBuilder sb = new StringBuilder();
sb.append(_statsHandler.toStatsHTML());
sb.append("Connections:
\n");
for (Connector connector : _connectors)
{
sb.append("").append(connector.getName()).append("
");
if (connector.getStatsOn())
{
sb.append("Statistics gathering started ").append(connector.getStatsOnMs()).append("ms ago").append("
\n");
sb.append("Total connections: ").append(connector.getConnections()).append("
\n");
sb.append("Current connections open: ").append(connector.getConnectionsOpen());
sb.append("Max concurrent connections open: ").append(connector.getConnectionsOpenMax()).append("
\n");
sb.append("Total connections duration: ").append(connector.getConnectionsDurationTotal()).append("
\n");
sb.append("Mean connection duration: ").append(connector.getConnectionsDurationMean()).append("
\n");
sb.append("Max connection duration: ").append(connector.getConnectionsDurationMax()).append("
\n");
sb.append("Connection duration standard deviation: ").append(connector.getConnectionsDurationStdDev()).append("
\n");
sb.append("Total requests: ").append(connector.getRequests()).append("
\n");
sb.append("Mean requests per connection: ").append(connector.getConnectionsRequestsMean()).append("
\n");
sb.append("Max requests per connection: ").append(connector.getConnectionsRequestsMax()).append("
\n");
sb.append("Requests per connection standard deviation: ").append(connector.getConnectionsRequestsStdDev()).append("
\n");
}
else
{
sb.append("Statistics gathering off.\n");
}
}
sb.append("Memory:
\n");
sb.append("Heap memory usage: ").append(_memoryBean.getHeapMemoryUsage().getUsed()).append(" bytes").append("
\n");
sb.append("Non-heap memory usage: ").append(_memoryBean.getNonHeapMemoryUsage().getUsed()).append(" bytes").append("
\n");
response.setContentType("text/html");
PrintWriter pout = response.getWriter();
pout.write(sb.toString());
}
}