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/*
* Combine multiple rrdFiles into one object
* It implements the same interface, but changing the content
*
* Part of the javascriptRRD package
* Copyright (c) 2010 Igor Sfiligoi, isfiligoi@ucsd.edu
*
* Original repository: http://javascriptrrd.sourceforge.net/
*
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*
*/
// ============================================================
// RRD RRA handling class
function RRDRRASum(rra_list,offset_list,treat_undefined_as_zero) {
this.rra_list=rra_list;
this.offset_list=offset_list;
this.treat_undefined_as_zero=treat_undefined_as_zero;
this.row_cnt= this.rra_list[0].getNrRows();
}
RRDRRASum.prototype.getIdx = function() {
return this.rra_list[0].getIdx();
}
// Get number of rows/columns
RRDRRASum.prototype.getNrRows = function() {
return this.row_cnt;
}
RRDRRASum.prototype.getNrDSs = function() {
return this.rra_list[0].getNrDSs();
}
// Get RRA step (expressed in seconds)
RRDRRASum.prototype.getStep = function() {
return this.rra_list[0].getStep();
}
// Get consolidation function name
RRDRRASum.prototype.getCFName = function() {
return this.rra_list[0].getCFName();
}
RRDRRASum.prototype.getEl = function(row_idx,ds_idx) {
var outSum=0.0;
for (var i in this.rra_list) {
var offset=this.offset_list[i];
if ((row_idx+offset)<this.row_cnt) {
var rra=this.rra_list[i];
val=rra.getEl(row_idx+offset,ds_idx);
} else {
/* out of row range -> undefined*/
val=undefined;
}
/* treat all undefines as 0 for now */
if (val==undefined) {
if (this.treat_undefined_as_zero) {
val=0;
} else {
/* if even one element is undefined, the whole sum is undefined */
outSum=undefined;
break;
}
}
outSum+=val;
}
return outSum;
}
// Low precision version of getEl
// Uses getFastDoubleAt
RRDRRASum.prototype.getElFast = function(row_idx,ds_idx) {
var outSum=0.0;
for (var i in this.rra_list) {
var offset=this.offset_list[i];
if ((row_id+offset)<this.row_cnt) {
var rra=this.rra_list[i];
val=rra.getElFast(row_idx+offset,ds_idx);
} else {
/* out of row range -> undefined*/
val=undefined;
}
/* treat all undefines as 0 for now */
if (val==undefined) {
if (this.treat_undefined_as_zero) {
val=0;
} else {
/* if even one element is undefined, the whole sum is undefined */
outSum=undefined;
break;
}
}
outSum+=val;
}
return outSum;
}
/*** INTERNAL ** sort by lastupdate, descending ***/
function rrdFileSort(f1, f2) {
return f2.getLastUpdate()-f1.getLastUpdate();
}
/*
* Sum several RRDfiles together
* They must all have the same DSes and the same RRAs
*/
function RRDFileSum(file_list,treat_undefined_as_zero) {
if (treat_undefined_as_zero==undefined) {
this.treat_undefined_as_zero=true;
} else {
this.treat_undefined_as_zero=treat_undefined_as_zero;
}
this.file_list=file_list;
this.file_list.sort();
// ===================================
// Start of user functions
this.getMinStep = function() {
return this.file_list[0].getMinStep();
}
this.getLastUpdate = function() {
return this.file_list[0].getLastUpdate();
}
this.getNrDSs = function() {
return this.file_list[0].getNrDSs();
}
this.getDSNames = function() {
return this.file_list[0].getDSNames();
}
this.getDS = function(id) {
return this.file_list[0].getDS(id);
}
this.getNrRRAs = function() {
return this.file_list[0].getNrRRAs();
}
this.getRRAInfo = function(idx) {
return this.file_list[0].getRRAInfo(idx);
}
this.getRRA = function(idx) {
var rra_info=this.getRRAInfo(idx);
var rra_step=rra_info.getStep();
var realLastUpdate=undefined;
var rra_list=new Array();
var offset_list=new Array();
for (var i in this.file_list) {
file=file_list[i];
fileLastUpdate=file.getLastUpdate();
if (realLastUpdate!=undefined) {
fileSkrew=Math.floor((realLastUpdate-fileLastUpdate)/rra_step);
} else {
fileSkrew=0;
firstLastUpdate=fileLastUpdate;
}
offset_list.push(fileSkrew);
fileRRA=file.getRRA(idx);
rra_list.push(fileRRA);
}
return new RRDRRASum(rra_list,offset_list,this.treat_undefined_as_zero);
}
}
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