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authorFrank Wuerthwein <fkw@ucsd.edu>2009-02-09 15:19:30 +0000
committerFrank Wuerthwein <fkw@ucsd.edu>2009-02-09 15:19:30 +0000
commitbbdc394b87d534470d404b3846356e5f1be89184 (patch)
tree14353cb474e37cbc64b33c9c6b753d670579ef0d /src/examples
parent5be3735232201398b51f342e253427178942a365 (diff)
First aproximation
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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 jFlot libraries
+ Part of the javascriptRRD package
+ Copyright (c) 2009 Frank Wuerthwein, fkw@ucsd.edu
+
+ Original repository: http://javascriptrrd.sourceforge.net/
+
+ MIT License [http://www.opensource.org/licenses/mit-license.php]
+
+-->
+
+<!--
+ This page requires jFlot.
+
+ Repository: http://code.google.com/p/flot/
+
+ For this example we load the required scripts directly from their examples page.
+ Production web pages should download their copy and serve them locally.
+
+-->
+
+<html>
+
+ <script type="text/javascript" src="../lib/binaryXHR.js"></script>
+ <script type="text/javascript" src="../lib/rrdFile.js"></script>
+
+ <!-- Using jFlot example URL... never do this on production pages -->
+ <script type="text/javascript" src="http://people.iola.dk/olau/flot/jquery.js"></script>
+ <script type="text/javascript" src="http://people.iola.dk/olau/flot/jquery.flot.js"></script>
+ <head>
+ <title>RRD Graphs with jFlot</title>
+ </head>
+
+ <body>
+ <h1 id="title">RRD Graphs with jFlot</h1>
+
+ RRD URL:
+ <input type="text" id="input_fname" value="example1.rrd"
+ onchange="fname_update()">
+ <button onclick="fname_update()">Update</button>
+ <hr>
+ <table border=0>
+ <tr>
+ <td>DS: <select id="select_ds"></select></td>
+ <td>RRA: <select id="select_rra"></select></td>
+ <td><button id="dsrra_button" onclick="element_update()" disabled=1>Update</button></td>
+ </tr>
+ </table>
+
+ <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>
+ <tr>
+ <td><b>DS</b></td><td id="ds_el">None</td>
+ <td><b>RRA</b></td><td id="rra_el">None</td>
+ <td><b>Step</b></td><td id="step_el">N/A</td>
+ </tr>
+ </table>
+
+ <div id="placeholder" style="width:600px;height:300px;"></div>
+
+ <div id="overview" style="margin-left:50px;margin-top:20px;width:400px;height:50px"></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() {
+ // Update DS info
+ var nrDSs=rrd_data.getNrDSs()
+
+ // But first cleanup anything that may be there from before
+ document.getElementById("ds_el").firstChild.data="None";
+ var oSelect=document.getElementById("select_ds");
+ while (oSelect.options.length>=1) {
+ oSelect.remove(0);
+ }
+
+ for (var i=0; i<nrDSs; i++) {
+ var ds_name=rrd_data.getDS(i).getName();
+ oSelect.options.add(new Option(ds_name,i,false,false));
+ }
+
+ // Update RRA info
+ var nrRRAs=rrd_data.getNrRRAs()
+
+ // But first cleanup anything that may be there from before
+ document.getElementById("step_el").firstChild.data="N/A";
+ document.getElementById("rra_el").firstChild.data="None";
+ var oSelect=document.getElementById("select_rra");
+ while (oSelect.options.length>=1) {
+ oSelect.remove(0);
+ }
+
+ for (var i=0; i<nrRRAs; i++) {
+ oSelect.options.add(new Option(i,i,false,false));
+ }
+
+ // cleanup
+ $.plot($("#placeholder"), [[]],{});
+ $.plot($("#overview"),[[]],{});
+
+ // Finally, update the file name and enable the update button
+ document.getElementById("fname").firstChild.data=fname;
+ document.getElementById("dsrra_button").disabled=0;
+ }
+
+ // This function updates the Web Page with the data from the RRD archive
+ function element_update() {
+ oSelDS=document.getElementById("select_ds");
+ ds_idx=oSelDS.options[oSelDS.selectedIndex].value;
+ oSelRRA=document.getElementById("select_rra");
+ rra_idx=oSelRRA.options[oSelRRA.selectedIndex].value;
+
+ // Generic header info
+ document.getElementById("ds_el").firstChild.data=rrd_data.getDS(ds_idx).getName();;
+ document.getElementById("rra_el").firstChild.data=rra_idx;
+
+ // get RRA info
+ var rra=rrd_data.getRRA(rra_idx);
+ var rows=rra.getNrRows();
+ var last_update=rrd_data.getLastUpdate();
+ var step=rra.getStep();
+ document.getElementById("step_el").firstChild.data=step;
+
+ var rra_pairs=[]
+
+ for (var i=0; i<rows;i++) {
+ var el=rra.getElFast(i,ds_idx);
+ if (el!=undefined) {
+ rra_pairs[i]=([(last_update+(i-rows+1)*step)*1000.0,el]);
+ } else {
+ rra_pairs[i]=null;
+ }
+ }
+
+ // Plot
+ var options = {
+ lines: { show: true },
+ xaxis: { mode: "time" },
+ selection: { mode: "x" },
+ };
+
+ var plot = $.plot($("#placeholder"), [rra_pairs], options);
+
+ var overview = $.plot($("#overview"), [rra_pairs], options);
+
+ // now connect the two
+
+ $("#placeholder").bind("plotselected", function (event, ranges) {
+ // do the zooming
+ plot = $.plot($("#placeholder"), [rra_pairs],
+ $.extend(true, {}, options, {
+ xaxis: { min: ranges.xaxis.from, max: ranges.xaxis.to }
+ }));
+
+ // don't fire event on the overview to prevent eternal loop
+ overview.setSelection(ranges, true);
+ });
+
+ $("#overview").bind("plotselected", function (event, ranges) {
+ plot.setSelection(ranges);
+ });
+ }
+
+ // 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;
+ 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);
+ }
+ }
+
+ // Uncomment this part if you want the Web page to load the
+ // default RRD file at load time
+ //
+ //try {
+ // FetchBinaryURLAsync(fname,update_fname_handler);
+ //} catch (err) {
+ // alert("Failed loading "+fname+"\n"+err);
+ //}
+
+ </script>
+ </body>
+</html>
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