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/*
* Async versions of the rrdFlot class
* Part of the javascriptRRD package
* Copyright (c) 2013 Igor Sfiligoi, isfiligoi@ucsd.edu
*
* Original repository: http://javascriptrrd.sourceforge.net/
*
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*
*/
/*
* Local dependencies:
* binaryXHR.js
* rrdFile.js and/or rrdMultiFile.js
* optionally rrdFilter.js
* rrdFlot.js
*
* Those modules may have other requirements.
*
*/
/*
* customization_callback = function(obj)
* This function, if defined, is called after the data has been loaded
* and before the rrdFlot object is instantiated
*
* The object passed as the sole argument is guaranteed to have the following arguments
* obj.rrd_data
* obj.graph_options
* obj.ds_graph_options
* obj.rrdflot_defaults
* obj.ds_op_list
* obj.rra_op_list
*
* The purpose of this callback is to give the caller the option of personalizing
* the Flot graph based on the content of the rrd_data
*
/* Internal helper function */
function rrdFlotAsyncCallback(bf,obj) {
var i_rrd_data=undefined;
if (bf.getLength()<1) {
alert("File "+obj.url+" is empty (possibly loading failed)!");
return 1;
}
try {
i_rrd_data=new RRDFile(bf);
} catch(err) {
alert("File "+obj.url+" is not a valid RRD archive!\n"+err);
}
if (i_rrd_data!=undefined) {
if (obj.rrd_data!=null) delete obj.rrd_data;
obj.rrd_data=i_rrd_data;
obj.callback();
}
}
/* Use url==null if you do not know the url yet */
function rrdFlotAsync(html_id, url,
graph_options, ds_graph_options, rrdflot_defaults, // see rrdFlot.js::rrdFlot for documentation of these
ds_op_list, // if defined, see rrdFilter.js::RRDFilterOp for documentation
rra_op_list, // if defined, see rrdFilter.js::RRDRRAFilterAvg for documentation
customization_callback // if defined, see above
) {
this.html_id=html_id;
this.url=url;
this.graph_options=graph_options;
this.ds_graph_options=ds_graph_options;
this.rrdflot_defaults=rrdflot_defaults;
this.ds_op_list=ds_op_list;
this.rra_op_list=rra_op_list;
this.customization_callback=customization_callback;
this.rrd_flot_obj=null;
this.rrd_data=null;
if (url!=null) {
this.reload(url);
}
}
rrdFlotAsync.prototype.reload = function(url) {
this.url=url;
try {
FetchBinaryURLAsync(url,rrdFlotAsyncCallback,this);
} catch (err) {
alert("Failed loading "+url+"\n"+err);
}
};
rrdFlotAsync.prototype.callback = function() {
if (this.rrd_flot_obj!=null) delete this.rrd_flot_obj;
if (this.customization_callback!=undefined) this.customization_callback(this);
var irrd_data=this.rrd_data;
if (this.ds_op_list!=undefined) irrd_data=new RRDFilterOp(irrd_data,this.ds_op_list);
if (this.rra_op_list!=undefined) irrd_data=new RRDRRAFilterAvg(irrd_data,this.rra_op_list);
this.rrd_flot_obj=new rrdFlot(this.html_id, irrd_data, this.graph_options, this.ds_graph_options, this.rrdflot_defaults);
};
// ================================================================================================================
/* Internal helper function */
function rrdFlotMultiAsyncCallback(bf,arr) {
var obj=arr[0];
var idx=arr[1];
obj.files_loaded++; // increase this even if it fails later on, else we will never finish
var i_rrd_data=undefined;
if (bf.getLength()<1) {
alert("File "+obj.url_list[idx]+" is empty (possibly loading failed)! You may get a parial result in the graph.");
} else {
try {
i_rrd_data=new RRDFile(bf);
} catch(err) {
alert("File "+obj.url_list[idx]+" is not a valid RRD archive! You may get a partial result in the graph.\n"+err);
}
}
if (i_rrd_data!=undefined) {
obj.loaded_data[idx]=i_rrd_data;
}
if (obj.files_loaded==obj.files_needed) {
obj.callback();
}
}
/* Use url_list==null if you do not know the urls yet */
function rrdFlotSumAsync(html_id, url_list,
graph_options, ds_graph_options, rrdflot_defaults, // see rrdFlot.js::rrdFlot for documentation of these
ds_op_list, // if defined, see rrdFilter.js::RRDFilterOp for documentation
rra_op_list, // if defined, see rrdFilter.js::RRDRRAFilterAvg for documentation
customization_callback // if defined, see above
) {
this.html_id=html_id;
this.url_list=url_list;
this.graph_options=graph_options;
this.ds_graph_options=ds_graph_options;
this.rrdflot_defaults=rrdflot_defaults;
this.ds_op_list=ds_op_list;
this.rra_op_list=rra_op_list;
this.customization_callback=customization_callback;
this.rrd_flot_obj=null;
this.rrd_data=null; //rrd_data will contain the sum of all the loaded data
this.loaded_data=null;
if (url_list!=null) {
this.reload(url_list);
}
}
rrdFlotSumAsync.prototype.reload = function(url_list) {
this.files_needed=url_list.length;
this.url_list=url_list;
delete this.loaded_data;
this.loaded_data=[];
this.files_loaded=0;
for (i in url_list) {
try {
FetchBinaryURLAsync(url_list[i],rrdFlotMultiAsyncCallback,[this,i]);
} catch (err) {
alert("Failed loading "+url_list[i]+". You may get a partial result in the graph.\n"+err);
this.files_needed--;
}
}
};
rrdFlotSumAsync.prototype.callback = function() {
if (this.rrd_flot_obj!=null) delete this.rrd_flot_obj;
var real_data_arr=new Array();
for (i in this.loaded_data) {
// account for failed loaded urls
var el=this.loaded_data[i];
if (el!=undefined) real_data_arr.push(el);
}
var rrd_sum=new RRDFileSum(real_data_arr);
if (this.rrd_data!=null) delete this.rrd_data;
this.rrd_data=rrd_sum;
if (this.customization_callback!=undefined) this.customization_callback(this);
rrd_sum=this.rrd_data; // customization_callback may have altered it
if (this.ds_op_list!=undefined) rrd_sum=new RRDFilterOp(rrd_sum,this.ds_op_list);
if (this.rra_op_list!=undefined) rrd_sum=new RRDRRAFilterAvg(rrd_sum,this.rra_op_list);
this.rrd_flot_obj=new rrdFlot(this.html_id, rrd_sum, this.graph_options, this.ds_graph_options, this.rrdflot_defaults);
};
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