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14 package org.eclipse.jetty.servlet;
15
16 import java.io.IOException;
17 import java.io.PrintWriter;
18 import java.lang.management.ManagementFactory;
19 import java.lang.management.MemoryMXBean;
20
21 import javax.servlet.ServletContext;
22 import javax.servlet.ServletException;
23 import javax.servlet.http.HttpServlet;
24 import javax.servlet.http.HttpServletRequest;
25 import javax.servlet.http.HttpServletResponse;
26
27 import org.eclipse.jetty.server.Connector;
28 import org.eclipse.jetty.server.Handler;
29 import org.eclipse.jetty.server.Server;
30 import org.eclipse.jetty.server.handler.ContextHandler;
31 import org.eclipse.jetty.server.handler.StatisticsHandler;
32 import org.eclipse.jetty.util.log.Log;
33
34 public class StatisticsServlet extends HttpServlet
35 {
36 boolean _restrictToLocalhost = true;
37 private StatisticsHandler _statsHandler;
38 private MemoryMXBean _memoryBean;
39 private Connector[] _connectors;
40
41 public void init() throws ServletException
42 {
43 ServletContext context = getServletContext();
44 ContextHandler.Context scontext = (ContextHandler.Context) context;
45 Server _server = scontext.getContextHandler().getServer();
46
47 Handler handler = _server.getChildHandlerByClass(StatisticsHandler.class);
48
49 if (handler != null)
50 {
51 _statsHandler = (StatisticsHandler) handler;
52 }
53 else
54 {
55 Log.warn("Statistics Handler not installed!");
56 return;
57 }
58
59 _memoryBean = ManagementFactory.getMemoryMXBean();
60 _connectors = _server.getConnectors();
61
62 if (getInitParameter("restrictToLocalhost") != null)
63 {
64 _restrictToLocalhost = "true".equals(getInitParameter("restrictToLocalhost"));
65 }
66
67 }
68
69 public void doPost(HttpServletRequest sreq, HttpServletResponse sres) throws ServletException, IOException
70 {
71 doGet(sreq, sres);
72 }
73
74 protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
75 {
76 if (_statsHandler == null)
77 {
78 Log.warn("Statistics Handler not installed!");
79 resp.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
80 return;
81 }
82 if (_restrictToLocalhost)
83 {
84 if (!"127.0.0.1".equals(req.getRemoteAddr()))
85 {
86 resp.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
87 return;
88 }
89 }
90
91 String wantXml = req.getParameter("xml");
92 if (wantXml == null)
93 wantXml = req.getParameter("XML");
94
95 if (wantXml != null && "true".equalsIgnoreCase(wantXml))
96 {
97 sendXmlResponse(resp);
98 }
99 else
100 {
101 sendTextResponse(resp);
102 }
103
104 }
105
106 private void sendXmlResponse(HttpServletResponse response) throws IOException
107 {
108 StringBuilder sb = new StringBuilder();
109
110 sb.append("<statistics>\n");
111
112 sb.append(" <requests>\n");
113 sb.append(" <statsOnMs>").append(_statsHandler.getStatsOnMs()).append("</statsOnMs>\n");
114
115 sb.append(" <requests>").append(_statsHandler.getRequests()).append("</requests>\n");
116 sb.append(" <requestsActive>").append(_statsHandler.getRequestsActive()).append("</requestsActive>\n");
117 sb.append(" <requestsActiveMax>").append(_statsHandler.getRequestsActiveMax()).append("</requestsActiveMax>\n");
118 sb.append(" <requestsTimeTotal>").append(_statsHandler.getRequestTimeTotal()).append("</requestsTimeTotal>\n");
119 sb.append(" <requestsTimeMean>").append(_statsHandler.getRequestTimeMean()).append("</requestsTimeMean>\n");
120 sb.append(" <requestsTimeMax>").append(_statsHandler.getRequestTimeMax()).append("</requestsTimeMax>\n");
121 sb.append(" <requestsTimeStdDev>").append(_statsHandler.getRequestTimeStdDev()).append("</requestsTimeStdDev>\n");
122
123 sb.append(" <dispatched>").append(_statsHandler.getDispatched()).append("</dispatched>\n");
124 sb.append(" <dispatchedActive>").append(_statsHandler.getDispatchedActive()).append("</dispatchedActive>\n");
125 sb.append(" <dispatchedActiveMax>").append(_statsHandler.getDispatchedActiveMax()).append("</dispatchedActiveMax>\n");
126 sb.append(" <dispatchedTimeTotal>").append(_statsHandler.getDispatchedTimeTotal()).append("</dispatchedTimeTotal>\n");
127 sb.append(" <dispatchedTimeMean").append(_statsHandler.getDispatchedTimeMean()).append("</dispatchedTimeMean>\n");
128 sb.append(" <dispatchedTimeMax>").append(_statsHandler.getDispatchedTimeMax()).append("</dispatchedTimeMax>\n");
129 sb.append(" <dispatchedTimeStdDev").append(_statsHandler.getDispatchedTimeStdDev()).append("</dispatchedTimeStdDev>\n");
130
131 sb.append(" <requestsSuspended>").append(_statsHandler.getSuspends()).append("</requestsSuspended>\n");
132 sb.append(" <requestsExpired>").append(_statsHandler.getExpires()).append("</requestsExpired>\n");
133 sb.append(" <requestsResumed>").append(_statsHandler.getResumes()).append("</requestsResumed>\n");
134 sb.append(" </requests>\n");
135
136 sb.append(" <responses>\n");
137 sb.append(" <responses1xx>").append(_statsHandler.getResponses1xx()).append("</responses1xx>\n");
138 sb.append(" <responses2xx>").append(_statsHandler.getResponses2xx()).append("</responses2xx>\n");
139 sb.append(" <responses3xx>").append(_statsHandler.getResponses3xx()).append("</responses3xx>\n");
140 sb.append(" <responses4xx>").append(_statsHandler.getResponses4xx()).append("</responses4xx>\n");
141 sb.append(" <responses5xx>").append(_statsHandler.getResponses5xx()).append("</responses5xx>\n");
142 sb.append(" <responsesBytesTotal>").append(_statsHandler.getResponsesBytesTotal()).append("</responsesBytesTotal>\n");
143 sb.append(" </responses>\n");
144
145 sb.append(" <connections>\n");
146 for (Connector connector : _connectors)
147 {
148 sb.append(" <connector>\n");
149 sb.append(" <name>").append(connector.getName()).append("</name>\n");
150 sb.append(" <statsOn>").append(connector.getStatsOn()).append("</statsOn>\n");
151 if (connector.getStatsOn())
152 {
153 sb.append(" <statsOnMs>").append(connector.getStatsOnMs()).append("</statsOnMs>\n");
154 sb.append(" <connections>").append(connector.getConnections()).append("</connections>\n");
155 sb.append(" <connectionsOpen>").append(connector.getConnectionsOpen()).append("</connectionsOpen>\n");
156 sb.append(" <connectionsOpenMax>").append(connector.getConnectionsOpenMax()).append("</connectionsOpenMax>\n");
157 sb.append(" <connectionsDurationTotal>").append(connector.getConnectionsDurationTotal()).append("</connectionsDurationTotal>\n");
158 sb.append(" <connectionsDurationMean>").append(connector.getConnectionsDurationMean()).append("</connectionsDurationMean>\n");
159 sb.append(" <connectionsDurationMax>").append(connector.getConnectionsDurationMax()).append("</connectionsDurationMax>\n");
160 sb.append(" <connectionsDurationStdDev>").append(connector.getConnectionsDurationStdDev()).append("</connectionsDurationStdDev>\n");
161 sb.append(" <requests>").append(connector.getRequests()).append("</requests>\n");
162 sb.append(" <connectionsRequestsMean>").append(connector.getConnectionsRequestsMean()).append("</connectionsRequestsMean>\n");
163 sb.append(" <connectionsRequestsMax>").append(connector.getConnectionsRequestsMax()).append("</connectionsRequestsMax>\n");
164 sb.append(" <connectionsRequestsStdDev>").append(connector.getConnectionsRequestsStdDev()).append("</connectionsRequestsStdDev>\n");
165 }
166 sb.append(" </connector>\n");
167 }
168 sb.append(" </connections>\n");
169
170 sb.append(" <memory>\n");
171 sb.append(" <heapMemoryUsage>").append(_memoryBean.getHeapMemoryUsage().getUsed()).append("</heapMemoryUsage>\n");
172 sb.append(" <nonHeapMemoryUsage>").append(_memoryBean.getNonHeapMemoryUsage().getUsed()).append("</nonHeapMemoryUsage>\n");
173 sb.append(" </memory>\n");
174
175 sb.append("</statistics>\n");
176
177 response.setContentType("text/xml");
178 PrintWriter pout = response.getWriter();
179 pout.write(sb.toString());
180 }
181
182 private void sendTextResponse(HttpServletResponse response) throws IOException
183 {
184 StringBuilder sb = new StringBuilder();
185 sb.append(_statsHandler.toStatsHTML());
186
187 sb.append("<h2>Connections:</h2>\n");
188 for (Connector connector : _connectors)
189 {
190 sb.append("<h3>").append(connector.getName()).append("</h3>");
191
192 if (connector.getStatsOn())
193 {
194 sb.append("Statistics gathering started ").append(connector.getStatsOnMs()).append("ms ago").append("<br />\n");
195 sb.append("Total connections: ").append(connector.getConnections()).append("<br />\n");
196 sb.append("Current connections open: ").append(connector.getConnectionsOpen());
197 sb.append("Max concurrent connections open: ").append(connector.getConnectionsOpenMax()).append("<br />\n");
198 sb.append("Total connections duration: ").append(connector.getConnectionsDurationTotal()).append("<br />\n");
199 sb.append("Mean connection duration: ").append(connector.getConnectionsDurationMean()).append("<br />\n");
200 sb.append("Max connection duration: ").append(connector.getConnectionsDurationMax()).append("<br />\n");
201 sb.append("Connection duration standard deviation: ").append(connector.getConnectionsDurationStdDev()).append("<br />\n");
202 sb.append("Total requests: ").append(connector.getRequests()).append("<br />\n");
203 sb.append("Mean requests per connection: ").append(connector.getConnectionsRequestsMean()).append("<br />\n");
204 sb.append("Max requests per connection: ").append(connector.getConnectionsRequestsMax()).append("<br />\n");
205 sb.append("Requests per connection standard deviation: ").append(connector.getConnectionsRequestsStdDev()).append("<br />\n");
206 }
207 else
208 {
209 sb.append("Statistics gathering off.\n");
210 }
211
212 }
213
214 sb.append("<h2>Memory:</h2>\n");
215 sb.append("Heap memory usage: ").append(_memoryBean.getHeapMemoryUsage().getUsed()).append(" bytes").append("<br />\n");
216 sb.append("Non-heap memory usage: ").append(_memoryBean.getNonHeapMemoryUsage().getUsed()).append(" bytes").append("<br />\n");
217
218 response.setContentType("text/html");
219 PrintWriter pout = response.getWriter();
220 pout.write(sb.toString());
221
222 }
223 }