📄 cache.jsp
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<%
/**
* $RCSfile: cache.jsp,v $
* $Revision: 1.3.2.1 $
* $Date: 2001/05/10 02:06:34 $
*/
%>
<%@ page import="java.util.*,
java.text.*,
com.coolservlets.forum.*,
com.coolservlets.util.*,
com.coolservlets.forum.database.*,
com.coolservlets.forum.util.*,
com.coolservlets.forum.util.admin.*" %>
<jsp:useBean id="adminBean" scope="session"
class="com.coolservlets.forum.util.admin.AdminBean"/>
<% ////////////////////////////////
// Jive authorization check
// check the bean for the existence of an authorization token.
// Its existence proves the user is valid. If it's not found, redirect
// to the login page
Authorization authToken = adminBean.getAuthToken();
if( authToken == null ) {
response.sendRedirect( "/mainctrl/bbs/admin" );
return;
}
%>
<% ////////////////////
// Security check
// make sure the user is authorized to create forums::
ForumFactory forumFactory = ForumFactory.getInstance(authToken);
ForumPermissions permissions = forumFactory.getPermissions(authToken);
boolean isSystemAdmin = permissions.get(ForumPermissions.SYSTEM_ADMIN);
// redirect to error page if we're not a forum admin or a system admin
if( !isSystemAdmin ) {
request.setAttribute("message","没有权限创建论坛");
response.sendRedirect("error.jsp");
return;
}
%>
<% /////////////////
// get parameters
int cacheID = ParamUtils.getIntParameter(request,"cacheID",-1);
boolean doClear = ParamUtils.getBooleanParameter(request,"doClear");
boolean doEdit = ParamUtils.getBooleanParameter(request,"doEdit");
boolean doSave = ParamUtils.getBooleanParameter(request,"doSave");
int maxSize = ParamUtils.getIntParameter(request,"cacheMaxSize",-1);
boolean cacheEnabled = ParamUtils.getBooleanParameter(request,"cacheEnabled");
boolean doCache = ParamUtils.getBooleanParameter(request,"doCache");
DbForumFactory dbForumFactory = null;
try {
dbForumFactory = (DbForumFactory)((ForumFactoryProxy)forumFactory).getUnderlyingForumFactory();
} catch (Exception e) { }
DbCacheManager cacheManager = dbForumFactory.getCacheManager();
// clear the requested cache
if( doClear ) {
if( cacheID != -1 ) {
cacheManager.clear(cacheID);
}
}
if( doSave ) {
if( cacheID != -1 ) {
Cache cache = cacheManager.getCache(cacheID);
cache.setMaxSize(maxSize*1024);
}
}
// turn the cache on or off
if( doCache ) {
cacheManager.setCacheEnabled(cacheEnabled);
}
cacheEnabled = cacheManager.isCacheEnabled();
%>
<%!
Runtime runtime = Runtime.getRuntime();
%>
<html>
<head>
<title></title>
<link rel="stylesheet" href="style/global.css">
<script language="JavaScript" type="text/javascript">
function convert(src,dest) {
if( dest.value == "" ) { return; }
var unit = src.options[src.selectedIndex].value;
if( unit == "K" ) {
dest.value = dest.value * 1024;
} else if( unit == "MB" ) {
dest.value = dest.value / 1024;
}
}
</script>
</head>
<body background="images/shadowBack.gif" bgcolor="#ffffff" text="#000000" link="#0000ff" vlink="#800080" alink="#ff0000">
<% ///////////////////////
// pageTitleInfo variable (used by include/pageTitle.jsp)
String[] pageTitleInfo = { "缓存" };
%>
<% ///////////////////
// pageTitle include
%><%@ include file="include/pageTitle.jsp" %>
<p>
<b>缓存列表</b>
<ul>
<% DecimalFormat formatter = new DecimalFormat("#.00");
%>
<table bgcolor="#999999" cellpadding="0" cellspacing="0" border="0">
<td>
<table cellpadding="4" cellspacing="1" border="0" width="100%">
<tr bgcolor="#eeeeee">
<td class="forumCellHeader" align="center"><b>缓存类型</b></td>
<td class="forumCellHeader" align="center"><b>大小</b></td>
<td class="forumCellHeader" align="center"><b>对象</b></td>
<td class="forumCellHeader" align="center"><b>效果</b></td>
<td class="forumCellHeader" align="center"> </td>
</tr>
<%
Cache cache;
double memUsed, totalMem, freeMem, hitPercent;
long hits, misses;
%>
<tr bgcolor="#ffffff">
<% cache = cacheManager.getCache(DbCacheManager.MESSAGE_CACHE); %>
<td>帖子</td>
<%
memUsed = (double)cache.getSize()/(1024*1024);
totalMem = (double)cache.getMaxSize()/(1024*1024);
freeMem = 100 - 100*memUsed/totalMem;
%>
<td><%= formatter.format(totalMem) %> MB,
<%= formatter.format(freeMem)%>%空闲
</td>
<td align=right> <%= cache.getNumElements() %> </td>
<%
hits = cache.getCacheHits();
misses = cache.getCacheMisses();
if (hits + misses == 0) { hitPercent = 0.0; }
else { hitPercent = 100*(double)hits/(hits+misses); }
%>
<td><%= formatter.format(hitPercent)%>% (<%= hits %>命中，<%= misses %>错失)</td>
<form action="cache.jsp">
<input type="hidden" name="doEdit" value="true">
<input type="hidden" name="cacheID" value="<%= DbCacheManager.MESSAGE_CACHE %>">
</form>
<form action="cache.jsp">
<input type="hidden" name="doClear" value="true">
<input type="hidden" name="cacheID" value="<%= DbCacheManager.MESSAGE_CACHE %>">
<td><input type="submit" value="清理缓存"></td>
</form>
</tr>
<% if( doEdit && cacheID==DbCacheManager.MESSAGE_CACHE ) { %>
<tr bgcolor="#ffffff">
<form action="cache.jsp">
<input type="hidden" name="doSave" value="true">
<input type="hidden" name="cacheID" value="<%= DbCacheManager.MESSAGE_CACHE %>">
<td colspan="4">
设置帖子大小：
<input type="text" value="<%= cache.getMaxSize()/1024 %>" size="6"
name="cacheMaxSize">K
<br>
1024 K = 1 MB, 2048 K = 2 MB, 3072 K = 3 MB
</td>
<td colspan="2" align="center"><input type="submit" value="保存"></td>
</form>
</tr>
<% } %>
<tr bgcolor="#ffffff">
<form action="cache.jsp">
<input type="hidden" name="doClear" value="true">
<input type="hidden" name="cacheID" value="<%= DbCacheManager.THREAD_CACHE %>">
<% cache = cacheManager.getCache(DbCacheManager.THREAD_CACHE); %>
<td>主题</td>
<%
memUsed = (double)cache.getSize()/(1024*1024);
totalMem = (double)cache.getMaxSize()/(1024*1024);
freeMem = 100 - 100*memUsed/totalMem;
%>
<td><%= formatter.format(totalMem) %> MB,
<%= formatter.format(freeMem)%>%空闲
</td>
<td align=right> <%= cache.getNumElements() %> </td>
<%
hits = cache.getCacheHits();
misses = cache.getCacheMisses();
if (hits + misses == 0) { hitPercent = 0.0; }
else { hitPercent = 100*(double)hits/(hits+misses); }
%>
<td><%= formatter.format(hitPercent)%>% (<%= hits %>命中，<%= misses %>错失)</td>
<form action="cache.jsp">
<input type="hidden" name="doEdit" value="true">
<input type="hidden" name="cacheID" value="<%= DbCacheManager.THREAD_CACHE %>">
</form>
<form action="cache.jsp">
<input type="hidden" name="doClear" value="true">
<input type="hidden" name="cacheID" value="<%= DbCacheManager.THREAD_CACHE %>">
<td><input type="submit" value="清理缓存"></td>
</form>
</tr>
<% if( doEdit && cacheID==DbCacheManager.THREAD_CACHE ) { %>
<tr bgcolor="#ffffff">
<form action="cache.jsp">
<input type="hidden" name="doSave" value="true">
<input type="hidden" name="cacheID" value="<%= DbCacheManager.THREAD_CACHE %>">
<td colspan="4">
设置帖子大小：
<input type="text" value="<%= cache.getMaxSize()/1024 %>" size="6"
name="cacheMaxSize">K
<br>
1024 K = 1 MB, 2048 K = 2 MB, 3072 K = 3 MB
</td>
<td colspan="2" align="center"><input type="submit" value="保存"></td>
</form>
</tr>
<% } %>
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