<DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!--
Example HTML/javascript file that display the
content of a RRD archive file in a graph
using the Flot libraries. This page adds two examples
to RRDJFlot.html of using RRDFilterOp to apply operations
(here, summing) to several or all of the DS in the RRD.
Part of the javascriptRRD package
Copyright (c) 2010 Frank Wuerthwein, fkw@ucsd.edu
Igor Sfiligoi, isfiligoi@ucsd.edu
Original repository: http://javascriptrrd.sourceforge.net/
MIT License [http://www.opensource.org/licenses/mit-license.php]
-->
<!--
This page requires Flot.
Repository: http://code.google.com/p/flot/
-->
<html>
<script type="text/javascript" src="../lib/binaryXHR.js"></script>
<script type="text/javascript" src="../lib/rrdFile.js"></script>
<!-- rrdFlot class needs the following four include files !-->
<script type="text/javascript" src="../lib/rrdFlotSupport.js"></script>
<script type="text/javascript" src="../lib/rrdFlot.js"></script>
<script type="text/javascript" src="../lib/rrdFile.js"></script>
<script type="text/javascript" src="../lib/rrdFilter.js"></script>
<script type="text/javascript" src="../../flot/jquery.js"></script>
<script type="text/javascript" src="../../flot/jquery.flot.js"></script>
<script type="text/javascript" src="../../flot/jquery.flot.selection.js"></script>
<script type="text/javascript" src="../../flot/jquery.flot.tooltip_0.4.2.js"></script>
<head>
<title>RRD Graphs with Flot</title>
</head>
<body>
<h1 id="title">RRD Graphs with Flot, with DS Filter Operations</h1>
RRD URL:
<input type="text" id="input_fname" value="example3.rrd"
onchange="fname_update()">
<button onclick="fname_update()">Update</button>
<hr>
<table id="infotable" border=1>
<tr><td colspan="21"><b>Javascript needed for this page to work</b></td></tr>
<tr><td><b>RRD file</b></td><td id="fname" colspan="5">None</td></tr>
</table>
<div id="mygraph"></div>
<script type="text/javascript">
// Remove the Javascript warning
document.getElementById("infotable").deleteRow(0);
// fname and rrd_data are the global variable used by all the functions below
fname=document.getElementById("input_fname").value;
rrd_data=undefined;
// This function updates the Web Page with the data from the RRD archive header
// when a new file is selected
function update_fname() {
// Finally, update the file name and enable the update button
document.getElementById("fname").firstChild.data=fname;
var graph_opts={legend: { noColumns:4}};
var ds_graph_opts={'Oscilator':{ color: "#ff8000",
lines: { show: true, fill: true, fillColor:"#ffff80"} },
'Idle':{ label: 'IdleJobs', color: "#00c0c0",
lines: { show: true, fill: true} },
'Running':{color: "#000000",yaxis:2}};
// the rrdFlot object creates and handles the graph
var f=new rrdFlot("mygraph",rrd_data,graph_opts,ds_graph_opts);
}
// Next three functions are for use in RRDFilterOp,
// which requires a list of functions, one for each DS
//Do nothing to the DS
function DoNothing(ds) {
this.getName = function() {return ds;}
this.getDSNames = function() {return [ds];}
this.computeResult = function(val_list) {return val_list[0];}
}
//Sum two DSs
function SumDS(ds1,ds2) {
this.getName = function() {return ds1+"+"+ds2;}
this.getDSNames = function() {return [ds1,ds2];}
this.computeResult = function(val_list) {return val_list[0]+val_list[1];}
}
//Sums multiple DSs from a given list
function MultiSumDS(list) {
this.getName = function() {return "SumTotal";}
this.getDSNames = function() {
var i = 0;
var name_list=[];
for(i=0;i<list.length;i++){
name_list.push(list[i].getName());
}
return name_list;}
this.computeResult = function(val_list) {
var val_sum=0;
var i=0;
for(i=0;i<val_list.length;i++){
val_sum+=val_list[i];
}
return val_sum;
}
}
// This is the callback function that,
// given a binary file object,
// verifies that it is a valid RRD archive
// and performs the update of the Web page
function update_fname_handler(bf) {
var i_rrd_data=undefined;
try {
var i_rrd_data=new RRDFile(bf);
} catch(err) {
alert("File "+fname+" is not a valid RRD archive!");
}
if (i_rrd_data!=undefined) {
rrd_data=i_rrd_data;
//If only one DS, cannot sum anything
if (rrd_data.getNrDSs()<2) {
alert("Not enough elements ("+rrd_data.getNrDSs()+") in RRD to sum!");
}
var op_list = []; //list of operations
var DS_list = []; //list of DSs to sum in MultiSumDS
var i = 0;
//create a new rrdlist, which contains all original elements
// (kept the same by DoNothing())
// plus additional operated-on DSs from RRDFilterOp
for (i=0;i<rrd_data.getNrDSs();i++) {
op_list.push(new DoNothing(rrd_data.getDS(i).getName()));
DS_list.push(rrd_data.getDS(i))
}
op_list.push(new MultiSumDS(DS_list));
op_list.push(new SumDS(rrd_data.getDS(0).getName(),rrd_data.getDS(1).getName()));
rrd_data = new RRDFilterOp(rrd_data,op_list);
update_fname()
}
}
// this function is invoked when the RRD file name changes
function fname_update() {
fname=document.getElementById("input_fname").value;
try {
FetchBinaryURLAsync(fname,update_fname_handler);
} catch (err) {
alert("Failed loading "+fname+"\n"+err);
}
}
</script>
</body>
</html>