/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.console.plugins.monitor;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.management.MBeanServer;
import javax.management.ObjectName;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jboss.logging.Logger;
import org.jboss.mx.util.MBeanServerLocator;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.DefaultTableXYDataset;
import org.jfree.data.XYSeries;
/**
* @author Bill Burke
* @version $Revision: 57191 $
*/
public class ManageSnapshotServlet extends javax.servlet.http.HttpServlet
{
static final long serialVersionUID = 128303790912009915L;
private static final Logger log = Logger.getLogger(ManageSnapshotServlet.class);
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
doit(req, resp);
}
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
doit(req, resp);
}
protected void error(String msg, HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
req.setAttribute("error", "Error: " + msg);
req.getRequestDispatcher("/manageSnapshot.jsp").forward(req, resp);
return;
}
protected void doit(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
String action = req.getParameter("action");
if (action == null)
{
error("unknown action: ", req, resp);
return;
}
action = action.trim();
MBeanServer mbeanServer = MBeanServerLocator.locateJBoss();
ObjectName monitorObjectName;
String attribute = null;
try
{
monitorObjectName = new ObjectName(req.getParameter("monitorObjectName"));
attribute = (String)mbeanServer.getAttribute(monitorObjectName, "ObservedAttribute");
}
catch (Exception ex)
{
error("Malformed Monitor ObjectName: " + req.getParameter("monitorObjectName"), req, resp);
return;
}
if (action.equals("Start Snapshot"))
{
Object[] nullArgs = {};
String[] nullSig = {};
try
{
mbeanServer.invoke(monitorObjectName, "startSnapshot", nullArgs, nullSig);
}
catch (Exception ex)
{
error("Problem invoking startSnapshot: " + ex.toString(), req, resp);
return;
}
req.getRequestDispatcher("/manageSnapshot.jsp").forward(req, resp);
return;
}
else if (action.equals("Stop Snapshot"))
{
Object[] nullArgs = {};
String[] nullSig = {};
try
{
mbeanServer.invoke(monitorObjectName, "endSnapshot", nullArgs, nullSig);
}
catch (Exception ex)
{
error("Problem invoking endSnapshot: " + ex.toString(), req, resp);
return;
}
req.getRequestDispatcher("/manageSnapshot.jsp").forward(req, resp);
return;
}
else if (action.equals("Clear Dataset"))
{
Object[] nullArgs = {};
String[] nullSig = {};
try
{
mbeanServer.invoke(monitorObjectName, "clearData", nullArgs, nullSig);
}
catch (Exception ex)
{
error("Problem invoking clearData: " + ex.toString(), req, resp);
return;
}
req.setAttribute("error", "Dataset Cleared!");
req.getRequestDispatcher("/manageSnapshot.jsp").forward(req, resp);
return;
}
else if (action.equals("Remove Snapshot"))
{
try
{
log.debug("removing snapshot: " + monitorObjectName.toString());
mbeanServer.unregisterMBean(monitorObjectName);
req.getRequestDispatcher("/ServerInfo.jsp").forward(req, resp);
}
catch (Exception ex)
{
error("Failed to Remove Monitor: " + ex.toString(), req, resp);
}
return;
}
else if (action.equals("Show Dataset"))
{
ArrayList data = null;
long start, end = 0;
try
{
data = (ArrayList)mbeanServer.getAttribute(monitorObjectName, "Data");
start = ((Long)mbeanServer.getAttribute(monitorObjectName, "StartTime")).longValue();
end = ((Long)mbeanServer.getAttribute(monitorObjectName, "EndTime")).longValue();
}
catch (Exception ex)
{
error("Problem invoking getData: " + ex.toString(), req, resp);
return;
}
resp.setContentType("text/html");
PrintWriter writer = resp.getWriter();
writer.println("<html>");
writer.println("<body>");
writer.println("<b>Start Time:</b> " + start + "ms<br>");
writer.println("<b>End Time:</b> " + end + "ms<br>");
writer.println("<b>Total Time:</b> " + (end - start) + "ms<br>");
writer.println("<br><table border=\"0\">");
for (int i = 0; i < data.size(); i++)
{
writer.println("<tr><td>" + data.get(i) + "</td></tr");
}
writer.println("</table></body></html>");
return;
}
else if (action.equals("Graph Dataset"))
{
ArrayList data = null;
long start, end = 0;
try
{
data = (ArrayList)mbeanServer.getAttribute(monitorObjectName, "Data");
start = ((Long)mbeanServer.getAttribute(monitorObjectName, "StartTime")).longValue();
end = ((Long)mbeanServer.getAttribute(monitorObjectName, "EndTime")).longValue();
}
catch (Exception ex)
{
error("Problem invoking getData: " + ex.toString(), req, resp);
return;
}
XYSeries set = new XYSeries(attribute, false, false);
for (int i = 0; i < data.size(); i++)
{
set.add(new Integer(i), (Number)data.get(i));
}
DefaultTableXYDataset dataset = new DefaultTableXYDataset(false);
dataset.addSeries(set);
JFreeChart chart = ChartFactory.createXYLineChart(
"JMX Attribute: " + attribute, "count", attribute, dataset,
PlotOrientation.VERTICAL,
true,
true,
false
);
resp.setContentType("image/png");
OutputStream out = resp.getOutputStream();
ChartUtilities.writeChartAsPNG(out, chart, 400, 300);
out.close();
return;
}
error("Unknown Action", req, resp);
return;
}
}
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