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basic admin page, shows memory usage, uptime, and connected users

This commit is contained in:
Andy Janata 2012-01-28 00:49:32 -08:00
parent 65c92d8440
commit 8ad224edad
2 changed files with 109 additions and 0 deletions
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99
WebContent/admin.jsp Normal file
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@ -0,0 +1,99 @@
<?xml version="1.0" encoding="ISO-8859-1" ?>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" %>
<%@ page import="com.google.inject.Injector" %>
<%@ page import="net.socialgamer.cah.StartupUtils" %>
<%@ page import="net.socialgamer.cah.data.ConnectedUsers" %>
<%@ page import="net.socialgamer.cah.data.User" %>
<%@ page import="java.util.Collection" %>
<%@ page import="java.util.Date" %>
<%
String remoteAddr = request.getRemoteAddr();
if (!(remoteAddr.equals("0:0:0:0:0:0:0:1") || remoteAddr.equals("127.0.0.1"))) {
response.sendError(403, "Access is restricted to known hosts");
}
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>CAH - Admin</title>
<style type="text/css" media="screen">
table, th, td {
border: 1px solid black;
}
th, td {
padding: 5px;
}
</style>
</head>
<body>
<%
ServletContext servletContext = pageContext.getServletContext();
Injector injector = (Injector) servletContext.getAttribute(StartupUtils.INJECTOR);
%>
<p>
Server up since
<%
Date startedDate = (Date) servletContext.getAttribute(StartupUtils.DATE_NAME);
long uptime = System.currentTimeMillis() - startedDate.getTime();
uptime /= 1000l;
long seconds = uptime % 60l;
long minutes = (uptime / 60l) % 60l;
long hours = (uptime / 60l / 60l) % 24l;
long days = (uptime / 60l / 60l / 24l);
out.print(String.format("%s (%d hours, %02d:%02d:%02d)",
startedDate.toString(), days, hours, minutes, seconds));
%>
</p>
<table>
<tr>
<th>Stat</th>
<th>MiB</th>
</tr>
<tr>
<td>In Use</td>
<td><% out.print((Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / 1024 / 1024); %></td>
</tr>
<tr>
<td>Free</td>
<td><% out.print(Runtime.getRuntime().freeMemory() / 1024 / 1024); %></td>
</tr>
<tr>
<td>JVM Allocated</td>
<td><% out.print(Runtime.getRuntime().totalMemory() / 1024 / 1024); %></td>
</tr>
<tr>
<td>JVM Max</td>
<td><% out.print(Runtime.getRuntime().maxMemory() / 1024 / 1024); %></td>
</tr>
</table>
<%
ConnectedUsers connectedUsers = injector.getInstance(ConnectedUsers.class);
Collection<User> users = connectedUsers.getUsers();
%>
<br/>
<table>
<tr>
<th>Username</th>
</tr>
<%
for (User u : users) {
%>
<tr>
<td><% out.print(u.getNickname()); %></td>
</tr>
<%
}
%>
</table>
</body>
</html>

10
src/net/socialgamer/cah/StartupUtils.java
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@ -1,5 +1,6 @@
package net.socialgamer.cah;
import java.util.Date;
import java.util.Timer;
import javax.servlet.ServletContext;
@ -20,6 +21,10 @@ public class StartupUtils extends GuiceServletContextListener {
private static final String PING_TIMER_NAME = "ping_timer";
public static final String DATE_NAME = "started_at";
private Date serverStarted;
@Override
public void contextDestroyed(final ServletContextEvent contextEvent) {
final ServletContext context = contextEvent.getServletContext();
@ -28,6 +33,9 @@ public class StartupUtils extends GuiceServletContextListener {
timer.cancel();
context.removeAttribute(PING_TIMER_NAME);
context.removeAttribute(INJECTOR);
context.removeAttribute(DATE_NAME);
super.contextDestroyed(contextEvent);
}
@Override
@ -37,8 +45,10 @@ public class StartupUtils extends GuiceServletContextListener {
final UserPing ping = injector.getInstance(UserPing.class);
final Timer timer = new Timer();
timer.schedule(ping, PING_START_DELAY, PING_CHECK_DELAY);
serverStarted = new Date();
context.setAttribute(PING_TIMER_NAME, timer);
context.setAttribute(INJECTOR, injector);
context.setAttribute(DATE_NAME, serverStarted);
}
@Override