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process_rrd.js
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process_rrd.js
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/*
* Copyright (C) 2006-2009 Citrix Systems Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; version 2.1 only. with the special
* exception on linking described in file LICENSE.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*/
var ring = function(size) {
this.size=size;
this.data=new Array(size);
this.current=size-1;
}
ring.prototype = {
push:function(value) {
this.current = this.current + 1
if(this.current==this.size)
this.current=0;
this.data[this.current]=value;
},
peek:function(i) {
if(i>=this.size)
return 0.0;
var index = this.current-i;
if(index<0)
index=index+this.size;
return this.data[index];
},
exprt:function(arr) {
for(var i=0; i<arr.length; i++) {
arr[i]=this.peek(i);
}
}
}
var rrd = function(names,values) {
this.rings=new Object;
for(var i=0; i<names.length; i++) {
this.rings[names[i]]=new ring(100);
}
this.update(names,values);
}
rrd.prototype = {
update:function(names,values) {
for(var i=0; i<names.length; i++) {
for(var j=values[i].length-1; j>=0; j--) {
if(!this.rings[names[i]]) {
this.rings[names[i]]=new ring(100);
}
this.rings[names[i]].push(values[i][j])
}
}
},
exprt:function(name,arr) {
if(this.rings[name])
this.rings[name].exprt(arr);
}
}
function processrrd(host,exp) {
var rows=exp.meta.rows;
var columns=exp.meta.columns;
if(rows==0)
return $xapi.hoststats[host].rings["t"].peek(0); // last update time
var data=new Array(columns+1);
var testre=/([^\:]*)\:([^\:]*):([^\:]*):(.*)/;
for(var i=0; i<columns+1; i++) {
data[i]=new Array(rows);
for(var j=0; j<rows; j++) {
if(i==0)
data[i][j]=exp.data[j].t;
else
data[i][j]=exp.data[j].values[i-1];
}
}
var myrrd=$xapi.hoststats[host];
if(!myrrd) {
myrrd=new rrd(["t"].concat(exp.meta.legend),data);
$xapi.hoststats[host]=myrrd;
} else {
myrrd.update(["t"].concat(exp.meta.legend),data);
}
function setit(name) {
var set = sets[name];
if(!set) {
var shortname=name;
var shortername=name;
var myarr=testre.exec(name);
if(myarr) {
shortname=myarr[3] + ":" + myarr[4];
shortername=myarr[4];
}
set=new dset(new Array(100),shortname,shortername,0,0);
sets[name]=set;
}
myrrd.exprt(name,set.data);
var bounds=getminmax(set.data);
set.max=bounds.max;
set.min=bounds.min;
}
var allsets = ["t"].concat(exp.meta.legend);
for(var i=0; i<columns+1; i++) {
setit(allsets[i],data[i]);
}
var currenttime=myrrd.rings["t"].peek(0);
var tset=sets["t"];
for(i=0; i<100; i++)
{
tset.data[i]-=currenttime
tset.data[i]/=60;
}
var bounds=getminmax(tset.data);
tset.max=bounds.max;
tset.min=bounds.min;
for(var graph in graphs) {
var gsets = graphs[graph].setsy;
var rescale = false;
for(var i=0; i<gsets.length; i++) {
if(sets[gsets[i]].max > graphs[graph].max_y)
rescale=true;
}
if(rescale)
graphs[graph].setup_graph(false,true);
graphs[graph].plotdatapoints();
}
return myrrd.rings["t"].peek(0); // last update time
}