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1
22 package org.jboss.console.plugins.monitor;
23
24 import java.io.IOException  ;
25 import java.io.OutputStream ;
26 import java.io.PrintWriter ;
27 import java.util.ArrayList ;
28
29 import javax.management.MBeanServer ;
30 import javax.management.ObjectName ;
31 import javax.servlet.ServletException ;
32 import javax.servlet.http.HttpServletRequest ;
33 import javax.servlet.http.HttpServletResponse ;
34
35 import org.jboss.logging.Logger;
36 import org.jboss.mx.util.MBeanServerLocator;
37 import org.jfree.chart.ChartFactory;
38 import org.jfree.chart.ChartUtilities;
39 import org.jfree.chart.JFreeChart;
40 import org.jfree.chart.plot.PlotOrientation;
41 import org.jfree.data.DefaultTableXYDataset;
42 import org.jfree.data.XYSeries;
43
44
48 public class ManageSnapshotServlet extends javax.servlet.http.HttpServlet
49 {
50 private static final Logger log = Logger.getLogger(ManageSnapshotServlet.class);
51
52 protected void doGet(HttpServletRequest req, HttpServletResponse resp)
53 throws ServletException , IOException
54 {
55 doit(req, resp);
56 }
57
58 protected void doPost(HttpServletRequest req, HttpServletResponse resp)
59 throws ServletException , IOException
60 {
61 doit(req, resp);
62 }
63
64 protected void error(String msg, HttpServletRequest req, HttpServletResponse resp)
65 throws ServletException , IOException
66 {
67 req.setAttribute("error", "Error: " + msg);
68 req.getRequestDispatcher("/manageSnapshot.jsp").forward(req, resp);
69 return;
70 }
71
72 protected void doit(HttpServletRequest req, HttpServletResponse resp)
73 throws ServletException , IOException
74 {
75 String action = req.getParameter("action");
76 if (action == null)
77 {
78 error("unknown action: ", req, resp);
79 return;
80 }
81 action = action.trim();
82 MBeanServer mbeanServer = MBeanServerLocator.locateJBoss();
83 ObjectName monitorObjectName;
84 String attribute = null;
85 try
86 {
87 monitorObjectName = new ObjectName (req.getParameter("monitorObjectName"));
88 attribute = (String )mbeanServer.getAttribute(monitorObjectName, "ObservedAttribute");
89 }
90 catch (Exception ex)
91 {
92 error("Malformed Monitor ObjectName: " + req.getParameter("monitorObjectName"), req, resp);
93 return;
94 }
95 if (action.equals("Start Snapshot"))
96 {
97 Object [] nullArgs = {};
98 String [] nullSig = {};
99 try
100 {
101 mbeanServer.invoke(monitorObjectName, "startSnapshot", nullArgs, nullSig);
102 }
103 catch (Exception ex)
104 {
105 error("Problem invoking startSnapshot: " + ex.toString(), req, resp);
106 return;
107 }
108 req.getRequestDispatcher("/manageSnapshot.jsp").forward(req, resp);
109 return;
110 }
111 else if (action.equals("Stop Snapshot"))
112 {
113 Object [] nullArgs = {};
114 String [] nullSig = {};
115 try
116 {
117 mbeanServer.invoke(monitorObjectName, "endSnapshot", nullArgs, nullSig);
118 }
119 catch (Exception ex)
120 {
121 error("Problem invoking endSnapshot: " + ex.toString(), req, resp);
122 return;
123 }
124 req.getRequestDispatcher("/manageSnapshot.jsp").forward(req, resp);
125 return;
126 }
127 else if (action.equals("Clear Dataset"))
128 {
129 Object [] nullArgs = {};
130 String [] nullSig = {};
131 try
132 {
133 mbeanServer.invoke(monitorObjectName, "clearData", nullArgs, nullSig);
134 }
135 catch (Exception ex)
136 {
137 error("Problem invoking clearData: " + ex.toString(), req, resp);
138 return;
139 }
140 req.setAttribute("error", "Dataset Cleared!");
141 req.getRequestDispatcher("/manageSnapshot.jsp").forward(req, resp);
142 return;
143 }
144 else if (action.equals("Remove Snapshot"))
145 {
146 try
147 {
148 log.debug("removing snapshot: " + monitorObjectName.toString());
149 mbeanServer.unregisterMBean(monitorObjectName);
150 req.getRequestDispatcher("/ServerInfo.jsp").forward(req, resp);
151 }
152 catch (Exception ex)
153 {
154 error("Failed to Remove Monitor: " + ex.toString(), req, resp);
155 }
156 return;
157 }
158 else if (action.equals("Show Dataset"))
159 {
160 ArrayList data = null;
161 long start, end = 0;
162 try
163 {
164 data = (ArrayList )mbeanServer.getAttribute(monitorObjectName, "Data");
165 start = ((Long )mbeanServer.getAttribute(monitorObjectName, "StartTime")).longValue();
166 end = ((Long )mbeanServer.getAttribute(monitorObjectName, "EndTime")).longValue();
167 }
168 catch (Exception ex)
169 {
170 error("Problem invoking getData: " + ex.toString(), req, resp);
171 return;
172 }
173 resp.setContentType("text/html");
174 PrintWriter writer = resp.getWriter();
175 writer.println("<html>");
176 writer.println("<body>");
177 writer.println("<b>Start Time:</b> " + start + "ms<br>");
178 writer.println("<b>End Time:</b> " + end + "ms<br>");
179 writer.println("<b>Total Time:</b> " + (end - start) + "ms<br>");
180 writer.println("<br><table border=\"0\">");
181 for (int i = 0; i < data.size(); i++)
182 {
183 writer.println("<tr><td>" + data.get(i) + "</td></tr");
184 }
185 writer.println("</table></body></html>");
186 return;
187 }
188 else if (action.equals("Graph Dataset"))
189 {
190 ArrayList data = null;
191 long start, end = 0;
192 try
193 {
194 data = (ArrayList )mbeanServer.getAttribute(monitorObjectName, "Data");
195 start = ((Long )mbeanServer.getAttribute(monitorObjectName, "StartTime")).longValue();
196 end = ((Long )mbeanServer.getAttribute(monitorObjectName, "EndTime")).longValue();
197 }
198 catch (Exception ex)
199 {
200 error("Problem invoking getData: " + ex.toString(), req, resp);
201 return;
202 }
203 XYSeries set = new XYSeries(attribute, false, false);
204 for (int i = 0; i < data.size(); i++)
205 {
206 set.add(new Integer (i), (Number )data.get(i));
207 }
208 DefaultTableXYDataset dataset = new DefaultTableXYDataset(false);
209 dataset.addSeries(set);
210 JFreeChart chart = ChartFactory.createXYLineChart(
211 "JMX Attribute: " + attribute, "count", attribute, dataset,
212 PlotOrientation.VERTICAL,
213 true,
214 true,
215 false
216 );
217 resp.setContentType("image/png");
218 OutputStream out = resp.getOutputStream();
219 ChartUtilities.writeChartAsPNG(out, chart, 400, 300);
220 out.close();
221 return;
222 }
223 error("Unknown Action", req, resp);
224 return;
225 }
226
227 }
228 |
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