<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://www.flotcharts.org/
[Previous repository: http://code.google.com/p/flot/]
-->
<html>
<script type="text/javascript" src="../lib/javascriptrrd.wlibs.js"></script>
<!-- the above script replaces the rrdfFlotAsync,rrdFlot, rrdFlotSelection, rrdFile, rrdFilter, binaryXHR and all the jquery libraries -->
<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);
//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 function is called after the data is loaded
// but before the graph is displayed
function mycallback(obj) {
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 almost all original elements
// plus additional operated-on DSs from RRDFilterOp
for (i=0;i<obj.rrd_data.getNrDSs();i++) {
if (i!=1) op_list.push(i);
DS_list.push(obj.rrd_data.getDS(i))
}
op_list.push(new MultiSumDS(DS_list));
op_list.push(new SumDS(obj.rrd_data.getDS(0).getName(),obj.rrd_data.getDS(1).getName()));
//we just customized the DS shown by the graph
obj.ds_op_list=op_list;
}
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}};
// we don't know what DSs we will get, so we have to use the callback
// in principle, we could personalize ds_graph_opts in the callback as well, but we keep it simple here
flot_obj=new rrdFlotAsync("mygraph",null,null,graph_opts,ds_graph_opts,null,null,null,mycallback);
// this function is invoked when the RRD file name changes
function fname_update() {
var fname=document.getElementById("input_fname").value;
flot_obj.reload(fname);
document.getElementById("fname").firstChild.data=fname;
}
</script>
</body>
</html>