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authoralisonjm <alisonjm>2011-04-07 21:42:56 +0000
committeralisonjm <alisonjm>2011-04-07 21:42:56 +0000
commit7d709b4130bed175dba0821be44d91039cbde97c (patch)
tree916d1a655f0e0ca25807b9329ecf3d8e8c9c960c /src/examples
parentbbce65d227a4fba1e618c9a64bb2b27726be86c5 (diff)
Added examples of using RRDFilterOp to sum two or more DSs
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+<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>
+ <head>
+ <title>RRD Graphs with Flot</title>
+ </head>
+
+ <body>
+ <h1 id="title">RRD Graphs with Flot, with Filter Operations</h1>
+
+ RRD URL:
+ <input type="text" id="input_fname" value="example1.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;}
+ }
+
+ //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>