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From conflue...@apache.org
Subject [CONF] Apache Geronimo Development: Monitoring and Management Service (page edited)
Date Sat, 23 Feb 2008 17:14:02 GMT
<html>
<head>
    <base href="http://cwiki.apache.org/confluence" />
    <style type="text/css">
    <!--
    body, p, td, table, tr, .bodytext, .stepfield {
	font-family: Verdana, arial, sans-serif;
	font-size: 11px;
	line-height: 16px;
	color: #000000;
	font-weight: normal;
}
#PageContent {
	text-align: left;
	background-color: #fff;
	padding: 0px;
	margin: 0px;
    padding-bottom:20px;
}
/*
** when this stylesheet is used for the Tiny MCE Wysiwyg editor's edit area, we can't
** use an id=PageContent or class=wiki-content, so we must
** set the body style to that used for PageContent, and p to that used for wiki-content.
*/

body {
	margin: 0px;
	padding: 0px;
	text-align: center;
    background-color: #f0f0f0;
}

@media print {

body {
    background-color: #fff;
}

}

.monospaceInput {
    font:12px monospace
}

.wiki-content p, .commentblock p {
    margin: 16px 0px 16px 0px;
    padding: 0px;
}

.wiki-content-preview {
    padding: 5px;
    border-left: 1px solid #3c78b5;
    border-right: 1px solid #3c78b5;
}

ul, ol {
    margin-top: 2px;
    margin-bottom: 2px;
    padding-top: 0px;
    padding-bottom: 0px;
}

pre {
    padding: 0px;
    margin-top: 5px;
    margin-left: 15px;
    margin-bottom: 5px;
    margin-right: 5px;
    text-align: left;
}

.helpheading {
    font-weight: bold;
    background-color: #D0D9BD;
        border-bottom: 1px solid #3c78b5;
        padding: 4px 4px 4px 4px;
        margin: 0px;
        margin-top: 10px;
}
.helpcontent {
        padding: 4px 4px 20px 4px;
    background-color: #f5f7f1;
}

.code {
 	border: 1px dashed #3c78b5;
    font-size: 11px;
	font-family: Courier;
    margin: 10px;
	line-height: 13px;
}

.focusedComment {
    background: #ffffce;
}

.commentBox, .focusedComment {
    padding: 10px;
    margin: 5px 0 5px 0;
    border: 1px #bbb solid;
}

.codeHeader {
    background-color: #f0f0f0;
 	border-bottom: 1px dashed #3c78b5;
    padding: 3px;
	text-align: center;
}

.codeContent {
    text-align: left;
    background-color: #f0f0f0;
    padding: 3px;
}

.preformatted {
 	border: 1px dashed #3c78b5;
    font-size: 11px;
	font-family: Courier;
    margin: 10px;
	line-height: 13px;
}

.preformattedHeader {
    background-color: #f0f0f0;
 	border-bottom: 1px dashed #3c78b5;
    padding: 3px;
	text-align: center;
}

.preformattedContent {
    background-color: #f0f0f0;
    padding: 3px;
}

.panel {
 	border: 1px dashed #3c78b5;
    margin: 10px;
    margin-top: 0px;
}

.panelHeader {
    background-color: #f0f0f0;
 	border-bottom: 1px dashed #3c78b5;
    padding: 3px;
	text-align: center;
}

.panelContent {
    background-color: #f0f0f0;
    padding: 5px;
}

.anonymousAlert {
    background-color: #f0f0f0;
 	border: 1px dashed red;
    font-size: 11px;
    padding: 10px 5px 10px 5px;
    margin: 4px;
	line-height: 13px;
}

.lockAlert {
    background-color: #f0f0f0;
    width: 50%;
 	border: 1px dashed red;
    font-size: 11px;
    padding: 10px 5px 10px 5px;
    margin: 4px;
	line-height: 13px;
}


.code-keyword {
  color: #000091;
  background-color: inherit;
}

.code-object {
  color: #910091;
  background-color: inherit;
}

.code-quote {
  color: #009100;
  background-color: inherit;
}

.code-comment {
  color: #808080;
  background-color: inherit;
}


.code-xml .code-keyword {
  color: inherit;
  font-weight: bold;
}

.code-tag {
  color: #000091;
  background-color: inherit;
}

.breadcrumbs {
    background-color: #f0f0f0;
 	border-color: #3c78b5;
	border-width: 1px 0px 1px 0px;
	border-style: solid;
    font-size: 11px;
    padding: 3px 0px 3px 0px;
}

.navmenu {
    border: 1px solid #ccc;
}

.menuheading {
    font-weight: bold;
    background-color: #f0f0f0;
 	border-bottom: 1px solid #3c78b5;
	padding: 4px 4px 2px 4px;
}

.menuitems {
	padding: 4px 4px 20px 4px;
}

.rightpanel {
    border-left: 1px solid #ccc;
    border-bottom: 1px solid #ccc;
}

#helpheading {
    text-align: left;
    font-weight: bold;
    background-color: #D0D9BD;
 	border-bottom: 1px solid #3c78b5;
	padding: 4px 4px 4px 4px;
	margin: 0px;
}
#helpcontent {
	padding: 4px 4px 4px 4px;
    background-color: #f5f7f1;
}
.helptab-unselected {
    font-weight: bold;
	padding: 5px;
    background-color: #f5f7f1;
}
.helptab-selected {
    font-weight: bold;
    background-color: #D0D9BD;
	padding: 5px;
}
.helptabs {
    margin: 0px;
    background-color: #f5f7f1;
	padding: 5px;
}
.infopanel-heading {
    font-weight: bold;
	padding: 4px 0px 2px 0px;
}

.pagebody {
}

.pageheader {
	padding: 5px 5px 5px 0px;
 	border-bottom: 1px solid #3c78b5;
}

.pagetitle {
	font-size: 22px;
	font-weight: bold;
	font-family: Arial, sans-serif;
	color: #003366;
}

.newpagetitle {
    color: #ccc !important;
}

.steptitle {
	font-size: 18px;
	font-weight: bold;
	font-family: Arial, sans-serif;
	color: #003366;
	margin-bottom: 7px;
}

.substeptitle {
    font-size: 12px;
    font-weight: bold;
    font-family: Arial, sans-serif;
    color: #003366;
    margin: 2px 4px 4px 4px;
    padding: 2px 4px 1px 4px;
}

.stepdesc {
    font-family: Verdana, arial, sans-serif;
	font-size: 11px;
	line-height: 16px;
	font-weight: normal;
    color: #666666;
    margin-top: 7px;
    margin-bottom: 7px;
}

.steplabel {
    font-weight: bold;
    margin-right: 4px;
    color: black;
    float: left;
    width: 15%;
    text-align: right;
}

.stepfield {
    background: #f0f0f0;
    padding: 5px;
}

.submitButtons{
    margin-top:5px;
    text-align:right;
}

.formtitle {
	font-size: 12px;
	font-weight: bold;
	font-family: Arial, sans-serif;
	color: #003366;
}

.sectionbottom {
    border-bottom: 1px solid #3c78b5;
}

.topRow {
    border-top: 2px solid #3c78b5;
}

.tabletitle {
	font-size: 14px;
	font-weight: bold;
	font-family: Arial, sans-serif;
    padding: 3px 0px 2px 0px;
    margin: 8px 4px 2px 0px;
	color: #003366;
	border-bottom: 2px solid #3c78b5;
}
.pagesubheading {
    color: #666666;
    font-size: 10px;
    padding: 0px 0px 5px 0px;
}

HR {
	color: 3c78b5;
	height: 1;
}

A:link, A:visited, A:active, A:hover {
	color: #003366;
}

h1 A:link, h1 A:visited, h1 A:active {
	text-decoration: none;
}

h1 A:hover {
    border-bottom: 1px dotted #003366;
}

.wiki-content > :first-child, .commentblock > :first-child {
    margin-top: 3px;
}

.logocell {
    padding: 10px;
}

input {
	font-family: verdana, geneva, arial, sans-serif;
	font-size: 11px;
	color: #000000;
}

textarea, textarea.editor {
	font-family: verdana, geneva, arial, sans-serif;
	font-size: 11px;
	color: #333333;
}

/* use logoSpaceLink instead.
.spacenametitle {
	font: 21px/31px Impact, Arial, Helvetica;
    font-weight: 100;
    color: #999999;
	margin: 0px;
}
.spacenametitle img {
  margin: 0 0 -4px 0;
}
.spacenametitle a {
    text-decoration: none;
    color: #999999;
}
.spacenametitle a:visited {
    text-decoration: none;
    color: #999999;
}*/

.spacenametitle-printable {
	font: 20px/25px Impact, Arial, Helvetica;
    font-weight: 100;
    color: #999999;
	margin: 0px;
}
.spacenametitle-printable a {
    text-decoration: none;
    color: #999999;
}
.spacenametitle-printable a:visited {
    text-decoration: none;
    color: #999999;
}

.blogDate {
	font-weight: bold;
	text-decoration: none;
	color: black;
}

.blogSurtitle {
    background: #f0f0f0;
 	border: 1px solid #ddd;
	padding: 3px;
	margin: 1px 1px 10px 1px;
}

.blogHeading {
    font-size: 20px;
    line-height: normal;
    font-weight: bold;
    padding: 0px;
    margin: 0px;
}

.blogHeading a {
   text-decoration: none;
   color: black;
}

.endsection {
	align: right;
	color: #666666;
	margin-top: 10px;
}
.endsectionleftnav {
	align: right;
	color: #666666;
	margin-top: 10px;
}

h1 {
	font-size: 24px;
	line-height: normal;
	font-weight: bold;
	background-color: #f0f0f0;
	color: #003366;
 	border-bottom: 1px solid #3c78b5;
	padding: 2px;
	margin: 36px 0px 4px 0px;
}

h2 {
	font-size: 18px;
	line-height: normal;
	font-weight: bold;
	background-color: #f0f0f0;
 	border-bottom: 1px solid #3c78b5;
	padding: 2px;
	margin: 27px 0px 4px 0px;
}

h3 {
	font-size: 14px;
	line-height: normal;
	font-weight: bold;
	background-color: #f0f0f0;
	padding: 2px;
	margin: 21px 0px 4px 0px;
}

h4 {
	font-size: 12px;
	line-height: normal;
	font-weight: bold;
	background-color: #f0f0f0;
	padding: 2px;
	margin: 18px 0px 4px 0px;
}

h4.search {
	font-size: 12px;
	line-height: normal;
	font-weight: normal;
	background-color: #f0f0f0;
	padding: 4px;
	margin: 18px 0px 4px 0px;
}

h5 {
	font-size: 10px;
	line-height: normal;
	font-weight: bold;
	background-color: #f0f0f0;
	padding: 2px;
	margin: 14px 0px 4px 0px;
}

h6 {
	font-size: 8px;
	line-height: normal;
	font-weight: bold;
	background-color: #f0f0f0;
	padding: 2px;
	margin: 14px 0px 4px 0px;
}

.smallfont {
    font-size: 10px;
}
.descfont {
    font-size: 10px;
    color: #666666;
}
.smallerfont {
    font-size: 9px;
}
.smalltext {
    color: #666666;
    font-size: 10px;
}
.smalltext a {
    color: #666666;
}
.smalltext-blue {
    color: #3c78b5;
    font-size: 10px;
}
.surtitle {
    margin-left: 1px;
    margin-bottom: 5px;
    font-size: 14px;
    color: #666666;
}

/* css hack found here:  http://www.fo3nix.pwp.blueyonder.co.uk/tutorials/css/hacks/ */
.navItemOver { font-size: 10px; font-weight: bold; color: #ffffff; background-color: #003366;
cursor: hand; voice-family: '\'}\''; voice-family:inherit; cursor: pointer;}
.navItemOver a { color: #ffffff; background-color:#003366; text-decoration: none; }
.navItemOver a:visited { color: #ffffff; background-color:#003366; text-decoration: none;
}
.navItemOver a:hover { color: #ffffff; background-color:#003366; text-decoration: none; }
.navItem { font-size: 10px; font-weight: bold; color: #ffffff; background-color: #3c78b5;
}
.navItem a { color: #ffffff; text-decoration: none; }
.navItem a:hover { color: #ffffff; text-decoration: none; }
.navItem a:visited { color: #ffffff; text-decoration: none; }

div.padded { padding: 4px; }
div.thickPadded { padding: 10px; }
h3.macrolibrariestitle {
    margin: 0px 0px 0px 0px;
}

div.centered { text-align: center; margin: 10px; }
div.centered table {margin: 0px auto; text-align: left; }

.tableview table {
    margin: 0;
}

.tableview th {
    text-align: left;
    color: #003366;
    font-size: 12px;
    padding: 5px 0px 0px 5px;
    border-bottom: 2px solid #3c78b5;
}
.tableview td {
    text-align: left;
    border-color: #ccc;
    border-width: 0px 0px 1px 0px;
    border-style: solid;
    margin: 0;
    padding: 4px 10px 4px 5px;
}

.grid {
    margin: 2px 0px 5px 0px;
    border-collapse: collapse;
}
.grid th  {
    border: 1px solid #ccc;
    padding: 2px 4px 2px 4px;
    background: #f0f0f0;
    text-align: center;
}
.grid td  {
    border: 1px solid #ccc;
    padding: 3px 4px 3px 4px;
}
.gridHover {
	background-color: #f9f9f9;
}

td.infocell {
    background-color: #f0f0f0;
}
.label {
	font-weight: bold;
	color: #003366;
}

label {
	font-weight: bold;
	color: #003366;
}

.error {
	background-color: #fcc;
}

.errorBox {
	background-color: #fcc;
    border: 1px solid #c00;
    padding: 5px;
    margin: 5px;
}

.errorMessage {
	color: #c00;
}

.success {
	background-color: #dfd;
}

.successBox {
	background-color: #dfd;
    border: 1px solid #090;
    padding: 5px;
    margin-top:5px;
    margin-bottom:5px;
}

blockquote {
	padding-left: 10px;
	padding-right: 10px;
	margin-left: 5px;
	margin-right: 0px;
	border-left: 1px solid #3c78b5;
}

table.confluenceTable
{
    margin: 5px;
    border-collapse: collapse;
}

/* Added as a temporary fix for CONF-4223. The table elements appear to be inheriting the
border: none attribute from the sectionMacro class */
table.confluenceTable td.confluenceTd
{
    border-width: 1px;
    border-style: solid;
    border-color: #ccc;
    padding: 3px 4px 3px 4px;
}

/* Added as a temporary fix for CONF-4223. The table elements appear to be inheriting the
border: none attribute from the sectionMacro class */
table.confluenceTable th.confluenceTh
{
    border-width: 1px;
    border-style: solid;
    border-color: #ccc;
    padding: 3px 4px 3px 4px;
    background-color: #f0f0f0;
    text-align: center;
}

td.confluenceTd
{
    border-width: 1px;
    border-style: solid;
    border-color: #ccc;
    padding: 3px 4px 3px 4px;
}

th.confluenceTh
{
    border-width: 1px;
    border-style: solid;
    border-color: #ccc;
    padding: 3px 4px 3px 4px;
    background-color: #f0f0f0;
    text-align: center;
}

DIV.small {
	font-size: 9px;
}

H1.pagename {
	margin-top: 0px;
}

IMG.inline  {}

.loginform {
    margin: 5px;
    border: 1px solid #ccc;
}

/* The text how the "This is a preview" comment should be shown. */
.previewnote { text-align: center;
                font-size: 11px;
                    color: red; }

/* How the preview content should be shown */
.previewcontent { background: #E0E0E0; }

/* How the system messages should be shown (DisplayMessage.jsp) */
.messagecontent { background: #E0E0E0; }

/* How the "This page has been modified..." -comment should be shown. */
.conflictnote { }

.createlink {
    color: maroon;
}
a.createlink {
    color: maroon;
}
.templateparameter {
    font-size: 9px;
    color: darkblue;
}

.diffadded {
    background: #ddffdd;
    padding: 1px 1px 1px 4px;
	border-left: 4px solid darkgreen;
}
.diffdeleted {
    color: #999;
    background: #ffdddd;
    padding: 1px 1px 1px 4px;
	border-left: 4px solid darkred;
}
.diffnochange {
    padding: 1px 1px 1px 4px;
	border-left: 4px solid lightgrey;
}
.differror {
    background: brown;
}
.diff {
    font-family: lucida console, courier new, fixed-width;
	font-size: 12px;
	line-height: 14px;
}
.diffaddedchars {
    background-color:#99ff99;
    font-weight:bolder;
}
.diffremovedchars {
    background-color:#ff9999;
    text-decoration: line-through;
    font-weight:bolder;
}

.greybackground {
    background: #f0f0f0
}

.greybox {
 	border: 1px solid #ddd;
	padding: 3px;
	margin: 1px 1px 10px 1px;
}

.borderedGreyBox {
    border: 1px solid #cccccc;
    background-color: #f0f0f0;
    padding: 10px;
}

.greyboxfilled {
 	border: 1px solid #ddd;
    background: #f0f0f0;
    padding: 3px;
	margin: 1px 1px 10px 1px;
}

.navBackgroundBox {
    padding: 5px 5px 5px 5px;
    font-size: 22px;
	font-weight: bold;
	font-family: Arial, sans-serif;
	color: white;
    background: #3c78b5;
    text-decoration: none;
}

.previewBoxTop {
	background-color: #f0f0f0;
    border-width: 1px 1px 0px 1px;
    border-style: solid;
    border-color: #3c78b5;
    padding: 5px;
    margin: 5px 0px 0px 0px;
    text-align: center;
}
.previewContent {
    background-color: #fff;
 	border-color: #3c78b5;
	border-width: 0px 1px 0px 1px;
	border-style: solid;
	padding: 10px;
	margin: 0px;
}
.previewBoxBottom {
	background-color: #f0f0f0;
    border-width: 0px 1px 1px 1px;
    border-style: solid;
    border-color: #3c78b5;
    padding: 5px;
    margin: 0px 0px 5px 0px;
    text-align: center;
}

.functionbox {
    background-color: #f0f0f0;
 	border: 1px solid #3c78b5;
	padding: 3px;
	margin: 1px 1px 10px 1px;
}

.functionbox-greyborder {
    background-color: #f0f0f0;
 	border: 1px solid #ddd;
	padding: 3px;
	margin: 1px 1px 10px 1px;
}

.search-highlight {
    background-color: #ffffcc;
}

/* normal (white) background */
.rowNormal {
    background-color: #ffffff;
 }

/* alternate (pale yellow) background */
.rowAlternate {
    background-color: #f7f7f7;
}

/* used in the list attachments table */
.rowAlternateNoBottomColor {
    background-color: #f7f7f7;
}

.rowAlternateNoBottomNoColor {
}

.rowAlternateNoBottomColor td {
    border-bottom: 0px;
}

.rowAlternateNoBottomNoColor td {
    border-bottom: 0px;
}

/* row highlight (grey) background */
.rowHighlight {
    background-color: #f0f0f0;

}

TD.greenbar {FONT-SIZE: 2px; BACKGROUND: #00df00; BORDER: 1px solid #9c9c9c; PADDING: 0px;
}
TD.redbar {FONT-SIZE: 2px; BACKGROUND: #df0000; BORDER: 1px solid #9c9c9c; PADDING: 0px; }
TD.darkredbar {FONT-SIZE: 2px; BACKGROUND: #af0000; BORDER: 1px solid #9c9c9c; PADDING: 0px;
}

TR.testpassed {FONT-SIZE: 2px; BACKGROUND: #ddffdd; PADDING: 0px; }
TR.testfailed {FONT-SIZE: 2px; BACKGROUND: #ffdddd; PADDING: 0px; }

.toolbar  {
    margin: 0px;
    border-collapse: collapse;
}

.toolbar td  {
    border: 1px solid #ccc;
    padding: 2px 2px 2px 2px;
    color: #ccc;
}

td.noformatting {
    border-width: 0px;
    border-style: none;
    text-align: center;
	padding: 0px;
}

.commentblock {
    margin: 12px 0 12px 0;
}

/*
 * Divs displaying the license information, if necessary.
 */
.license-eval, .license-none, .license-nonprofit {
    border-top: 1px solid #bbbbbb;
    text-align: center;
    font-size: 10px;
    font-family: Verdana, Arial, Helvetica, sans-serif;
}

.license-eval, .license-none {
    background-color: #ffcccc;
}

.license-eval b, .license-none b {
    color: #990000
}

.license-nonprofit {
    background-color: #ffffff;
}

/*
 * The shadow at the bottom of the page between the main content and the
 * "powered by" section.
 */
.bottomshadow {
    height: 12px;
    background-image: url("$req.contextPath/images/border/border_bottom.gif");
    background-repeat: repeat-x;
}

/*
 * Styling of the operations box
 */
.navmenu .operations li, .navmenu .operations ul {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

.navmenu .operations ul {
    margin-bottom: 9px;
}

.navmenu .label {
    font-weight: inherit;
}

/*
 * Styling of ops as a toolbar
 */
.toolbar div {
    display: none;
}

.toolbar .label {
    display: none;
}

.toolbar .operations {
    display: block;
}

.toolbar .operations ul {
    display: inline;
    list-style: none;
    margin-left: 10px;
    padding-left: 0;
}

.toolbar .operations li {
    list-style: none;
    display: inline;
}

/* list page navigational tabs */
#foldertab {
padding: 3px 0px 3px 8px;
margin-left: 0;
border-bottom: 1px solid #3c78b5;
font: bold 11px Verdana, sans-serif;
}

#foldertab li {
list-style: none;
margin: 0;
display: inline;
}

#foldertab li a {
padding: 3px 0.5em;
margin-left: 3px;
border: 1px solid #3c78b5;
border-bottom: none;
background: #3c78b5;
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<div id="PageContent">
<table class="pagecontent" border="0" cellpadding="0" cellspacing="0" width="100%"><tr>
<td valign="top" class="pagebody">

    <div class="pageheader">
        <span class="pagetitle">
            Page Edited :
            <a href="http://cwiki.apache.org/confluence/display/GMOxDEV">GMOxDEV</a>
:
            <a href="http://cwiki.apache.org/confluence/display/GMOxDEV/Monitoring+and+Management+Service">Monitoring
and Management Service</a>
        </span>
    </div>

     <p>
        <a href="http://cwiki.apache.org/confluence/display/GMOxDEV/Monitoring+and+Management+Service">Monitoring
and Management Service</a>
        has been edited by             <a href="http://cwiki.apache.org/confluence/display/~vhnguyen">Viet
Nguyen</a>
            <span class="smallfont">(Feb 23, 2008)</span>.
     </p>
    
     <p>
                 <a href="http://cwiki.apache.org/confluence/pages/diffpagesbyversion.action?pageId=64587&originalVersion=41&revisedVersion=42">(View
changes)</a>
     </p>

    <span class="label">Content:</span><br/>
    <div class="greybox wiki-content"><h1><a name="MonitoringandManagementService-Overview"></a>Overview</h1>

<p>Currently, there is not a good way of surfacing Geronimo's server information so
that an administrator can monitor the server's status. The architecture of using MBeans is
established, but not fully exploited. This enhancement will take advantage of what Geronimo
currently offers and extend it so that a server can tap into a cluster of servers and extract
information from specific Geronimo servers or even aggregates of Geronimo servers.</p>

<h2><a name="MonitoringandManagementService-Goal"></a>Goal</h2>

<p>The goal is to have at least one machine be able to reach out to all Geronimo servers
in order to fetch data or even alter their state. This will be especially useful in the case
of someone having to monitor a large number of Geronimo servers.</p>

<h1><a name="MonitoringandManagementService-Howitworks"></a>How it works</h1>

<p>As part of the design, there are five major components.</p>

<p><b>Management Node(s)</b>: An instance of Geronimo that has sole purpose
of managing and viewing information from Server Nodes, must include admin console.<br/>
<b>Management Plugin</b>: Will reside on all Management Nodes and will handle
the connection to the Remote Control Plugin to pull relevant information and control the machine.<br/>
<b>Connection Information DB</b>: Resides on either a Management Node or a different
database server, has Server Name, IP:Port information and remote authentication information
for all Server Nodes. Management Nodes use this information to connect to the Server Nodes<br/>
<b>Server Node(s)</b>: An instance of Geronimo that runs as usual, can be Little
G with our MBean and anywhere up from there.<br/>
<b>Remote Control Plugin</b>: Will be present on all Server Nodes, handle JSR-77
statistics collection, control the thread which takes snapshots of the server's current state.</p>

<p>The proposed solution would incorporate a scalable design, using the same methods
to keep track of statistics and read them locally that it would be pulling them remotely from
N machines. This is accomplished by creating a thin layer (Remote Control Plugin) that will
work to be a tie-in point for all the statistics, taking a 'snapshot' of the current state
of things every X minutes and recording in a database for a predetermined amount of time before
there is rollover. With this thin layer serving as a relay point for this data, we can simply
connect to it via remote OpenEJB authentication through the Management Plugin, or a different
remote machine (i.e. a proposed 'management node') to pull the information, as well as gain
control over functions such as simple start/stop/restart, or in the future could be expanded
to deploying/uninstalling/redeploying across an entire cluster.</p>

<p>There will not be an active connection from the management node to the server nodes
at all times, and will instead be an on-demand connection that will be used only when control
or information is requested, resulting in little network overhead.<div align="center"><img
src="/confluence/download/attachments/64587/overview.jpg" border="0" /></div></p>

<h2><a name="MonitoringandManagementService-ManagementPluginArchitecture"></a>Management
Plugin Architecture</h2>

<p>The management plugin resides on the <b>management node</b>, and serves
as the user interface for requesting, processing, and then displaying statistical information
from the <b>server node(s)</b>, as well as providing an interface for a significant
degree of control over them, including</p>
<ul>
	<li>Server group management
	<ul>
		<li>Deploy/undeploy across multiple, set attributes across multiple, start/stop/restart
multiple</li>
	</ul>
	</li>
	<li>Historical statistics view for 1-n servers</li>
	<li>Ability to custom-define statistics collection per-machine, per-group, across entire
cluster</li>
	<li>Manipulate snapshot interval, retention period</li>
	<li>Enable/disable archiving, define archiving time/retention</li>
</ul>



<table cellpadding='5' width='85%' cellspacing='8px' class='noteMacro' border="0" align='center'><colgroup><col
width='24'><col></colgroup><tr><td valign='top'><img src="/confluence/images/icons/emoticons/warning.gif"
width="16" height="16" align="absmiddle" alt="" border="0"></td><td>
<p>There are two methods to collect statistics</p>
<ol>
	<li>using MEJB (requires OpenEJB)</li>
	<li>using pure JMX (does not require OpenEJB)</li>
</ol>
</td></tr></table>

<h2><a name="MonitoringandManagementService-CollectingStatisticsUsingMEJB%28Method1%29"></a>Collecting
Statistics Using MEJB (Method 1)</h2>

<p>The RCP, or collecting agent, will reside on the <b>Server Node</b> and
will be in charge of preparing information for the <b>Management Node.</b> Since
there are many statistics for different MBeans that the admin could track, we will use the
MEJB component that is already implemented in Geronimo to contact these MBeans. <div align="center"><img
src="/confluence/download/attachments/64587/RCP.jpg" border="0" /></div><br/>
The Master Controller is the collecting agent that will do the managerial tasks such as query
the mbeans for their statistics and what not. Additionally, the Master Controller will set
timers via the EJB TimerService in order to periodically capture "snapshots." This term will
refer to the server's statistics for a given time. With the timers set, we can save the history
of the server's statistics. Upon request, the Master Controller will gather all of the information
(either by calling MEJB or looking into the server's history stored in a database) and respond
by shipping the data back to the <b>Management Node.</b><br/>
Note: All stats will be JSR-77 compliant.</p>

<h3><a name="MonitoringandManagementService-Takingsnapshots"></a>Taking
snapshots</h3>

<p>As of now, the collecting agent will create EJB Timers, if it does not already exist,
to capture the server's essential information. On each callback the snapshot information on
the server itself will be stored to the local database residing on the <b>Server Node</b>.
In order to preserve the history, there will be a monthly (default, but can be configured)
archive of the server's information stored locally.</p>

<h2><a name="MonitoringandManagementService-CollectingStatisticsUsingPureJMX%28Method2%29"></a>Collecting
Statistics Using Pure JMX (Method 2)</h2>

<p>There is a second flavor of a collecting agent. The second option is to use pure
JMX, bypassing the retrieval of the MEJB mbean in the server. All of the functionality is
the same, because EJB timers are replaced with threads. Therefore, stopping a snapshot querying
may take longer because of the use of threads as opposed to EJB Timers.</p>

<h2><a name="MonitoringandManagementService-MEJBMethodDependencies"></a>MEJB
Method Dependencies</h2>
<ol>
	<li>agent-ds                    // datasource plugin</li>
	<li>agent-ejb                   // MEJB controller library</li>
	<li>agent-ear                   // packaging of agent-ejb and agent-jar</li>
	<li>agent-jar                   // common utility classes used to talk to the DB</li>
	<li>agent-sql                   // common sql commands to execute during deployment
(used by agent-ds)</li>
</ol>


<h2><a name="MonitoringandManagementService-PureJMXMethodDepenedencies"></a>Pure
JMX Method Depenedencies</h2>
<ol>
	<li>agent-ds                    // datasource plugin</li>
	<li>agent-car-jmx               // JMX controller library</li>
	<li>agent-ear                   // packaging of agent-ejb and agent-jar</li>
	<li>agent-jar                   // common utility classes used to talk to the DB</li>
	<li>agent-sql                   // common sql commands to execute during deployment
(used by agent-ds)</li>
</ol>


<h2><a name="MonitoringandManagementService-UsingotherDatabasestostoresnapshotinformationontheServerNode"></a>Using
other Databases to store snapshot information on the Server Node</h2>

<p>The current architecture of the collecting agent really comes in a pair of plugins
(one for the providing the thin layer, and the other for providing that thin layer with a
couple datasources). By modularizing these different entities, if the admin would swap out
the Datasource with his/her own, the admin could save the snapshot information into any database
that is supported by Geronimo. Other examples of notable plugins that use this technique of
having a Datasource as a plugin are Jetspeed and Roller. </p>

<h2><a name="MonitoringandManagementService-DatabaseSchema%28subjecttochangesoon%29"></a>Database
Schema (subject to change soon)</h2>

<p>MBeans<br/>
  -&gt; id (PK)<br/>
  -&gt; mbeanName<br/>
  -&gt; statsNameList<br/>
Statistics<br/>
  -&gt; id (PK)<br/>
  -&gt; mbeanId (FK references MBeans.id)<br/>
  -&gt; snapshot_time<br/>
  -&gt; statsValueList</p>

<p>The values of MBeans.statsNameList and Statistics.statsValueList are CSV strings
to represent an MBean's statistics name and value respectively. This is not the final design
and will be changed.</p>

<h3><a name="MonitoringandManagementService-CurrentlyImplemented"></a>Currently
Implemented</h3>

<ol>
	<li>Archive snapshots every month</li>
	<li>Return arbitrary number of snapshots' information</li>
	<li>Ability to start/stop snapshot thread</li>
	<li>Ability to specify the duration of time in between snapshots</li>
	<li>Ability to fetch JSR-77 stats</li>
	<li>Ability to modify mbean attributes</li>
	<li>Ability to add additional mbeans to keep track of in the snapshot process</li>
	<li>Ability to remove mbeans from the list that the snapshot process refers to to get
take its snapshots</li>
	<li>JSR-77 stats for Tomcat Connectors and Jetty Containers are surfaced</li>
	<li>Turn statistics option on for all StatisticsProvider components.</li>
	<li>Package collecting agent as a plugin (CAR) with a dependency on the MEJB module.</li>
	<li>Provide support for Jetty Connector stats (in Geronimo's code-base)</li>
</ol>


<h3><a name="MonitoringandManagementService-CurrentGoals"></a>Current Goals</h3>

<ol>
	<li>Restore statistics option (on or off) when the collecting agent is undeployed.</li>
	<li>Provide ability to control the stopping/starting of components within server using
StateManageable Objects (SMO).</li>
</ol>


<h3><a name="MonitoringandManagementService-CurrentConcerns"></a>Current
Concerns</h3>

<ol>
	<li>The connection between client and server requires for the server to have OpenEJB
installed. This will tremendously limit the plugin to work only with Application Servers with
OpenEJB. Perhaps JMX remoting is another option or alternative.</li>
</ol>
</div>


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