prometheus/web/static/js/graph.js
Johannes 'fish' Ziemke 6213c0f1ee Add missing semicolons.
2013-03-21 17:54:03 +01:00

417 lines
11 KiB
JavaScript

// Graph options we might want:
// Grid off/on
// Stacked off/on
// Area off/on
// Legend position
// Short link
// Graph title
// Palette
// Background
// Enable tooltips
// width/height
// Axis options
// Y-Range min/max
// (X-Range min/max)
// X-Axis format
// Y-Axis format
// Y-Axis title
// X-Axis title
// Log scale
var Prometheus = Prometheus || {};
var graphs = [];
Prometheus.Graph = function(element, options) {
this.el = element;
this.options = options;
this.changeHandler = null;
this.rickshawGraph = null;
this.data = [];
this.initialize();
};
Prometheus.Graph.timeFactors = {
"y": 60 * 60 * 24 * 365,
"w": 60 * 60 * 24 * 7,
"d": 60 * 60 * 24,
"h": 60 * 60,
"m": 60,
"s": 1
};
Prometheus.Graph.stepValues = [
"1s", "10s", "1m", "5m", "15m", "30m", "1h", "2h", "6h", "12h", "1d", "2d",
"1w", "2w", "4w", "8w", "1y", "2y"
];
Prometheus.Graph.numGraphs = 0;
Prometheus.Graph.prototype.initialize = function() {
var self = this;
self.id = Prometheus.Graph.numGraphs++;
// Set default options.
self.options['id'] = self.id;
self.options['range_input'] = self.options['range_input'] || "1h";
self.options['stacked_checked'] = self.options['stacked'] ? "checked" : "";
// Draw graph controls and container from Handlebars template.
var source = $("#graph_template").html();
var template = Handlebars.compile(source);
var graphHtml = template(self.options);
self.el.append(graphHtml);
// Get references to all the interesting elements in the graph container and
// bind event handlers.
var graphWrapper = self.el.find("#graph_wrapper" + self.id);
self.queryForm = graphWrapper.find(".query_form");
self.expr = graphWrapper.find("input[name=expr]");
self.rangeInput = self.queryForm.find("input[name=range_input]");
self.stacked = self.queryForm.find("input[name=stacked]");
self.insertMetric = self.queryForm.find("select[name=insert_metric]");
self.graph = graphWrapper.find(".graph");
self.legend = graphWrapper.find(".legend");
self.spinner = graphWrapper.find(".spinner");
self.evalStats = graphWrapper.find(".eval_stats");
self.endDate = graphWrapper.find("input[name=end_input]");
if (self.options["end_input"]) {
self.endDate.appendDtpicker({"current": self.options["end_input"]});
} else {
self.endDate.appendDtpicker();
self.endDate.val("");
}
self.endDate.change(function() { self.submitQuery() });
self.stacked.change(function() { self.updateGraph(); });
self.queryForm.submit(function() { self.submitQuery(); return false; });
self.spinner.hide();
self.queryForm.find("input[name=inc_range]").click(function() { self.increaseRange(); });
self.queryForm.find("input[name=dec_range]").click(function() { self.decreaseRange(); });
self.queryForm.find("input[name=inc_end]").click(function() { self.increaseEnd(); });
self.queryForm.find("input[name=dec_end]").click(function() { self.decreaseEnd(); });
self.insertMetric.change(function() {
self.expr.val(self.expr.val() + self.insertMetric.val());
});
self.expr.focus(); // TODO: move to external Graph method.
self.populateInsertableMetrics();
if (self.expr.val()) {
self.submitQuery();
}
};
Prometheus.Graph.prototype.populateInsertableMetrics = function() {
var self = this;
$.ajax({
method: "GET",
url: "/api/metrics",
dataType: "json",
success: function(json, textStatus) {
for (var i = 0; i < json.length; i++) {
self.insertMetric[0].options.add(new Option(json[i], json[i]));
}
},
error: function() {
alert("Error loading available metrics!");
},
});
};
Prometheus.Graph.prototype.onChange = function(handler) {
this.changeHandler = handler;
};
Prometheus.Graph.prototype.getOptions = function() {
var self = this;
var options = {};
var optionInputs = [
"expr",
"range_input",
"end_input",
"step_input",
"stacked"
];
self.queryForm.find("input").each(function(index, element) {
var name = element.name;
if ($.inArray(name, optionInputs) >= 0) {
if (name == "stacked") {
options[name] = element.checked;
} else {
options[name] = element.value;
}
}
});
return options;
};
Prometheus.Graph.prototype.parseRange = function(rangeText) {
var rangeRE = new RegExp("^([0-9]+)([ywdhms]+)$");
var matches = rangeText.match(rangeRE);
if (matches.length != 3) {
return 60;
}
var value = parseInt(matches[1]);
var unit = matches[2];
return value * Prometheus.Graph.timeFactors[unit];
};
Prometheus.Graph.prototype.increaseRange = function() {
var self = this;
var rangeSeconds = self.parseRange(self.rangeInput.val());
for (var i = 0; i < Prometheus.Graph.stepValues.length; i++) {
if (rangeSeconds < self.parseRange(Prometheus.Graph.stepValues[i])) {
self.rangeInput.val(Prometheus.Graph.stepValues[i]);
if (self.expr.val()) {
self.submitQuery();
}
return;
}
}
};
Prometheus.Graph.prototype.decreaseRange = function() {
var self = this;
var rangeSeconds = self.parseRange(self.rangeInput.val());
for (var i = Prometheus.Graph.stepValues.length - 1; i >= 0; i--) {
if (rangeSeconds > self.parseRange(Prometheus.Graph.stepValues[i])) {
self.rangeInput.val(Prometheus.Graph.stepValues[i]);
if (self.expr.val()) {
self.submitQuery();
}
return;
}
}
};
Prometheus.Graph.prototype.getEndDate = function() {
var self = this;
if (!self.endDate || !self.endDate.val()) {
return null;
}
return new Date(self.endDate.val()).getTime();
};
Prometheus.Graph.prototype.getOrSetEndDate = function() {
var self = this;
var date = self.getEndDate();
if (date) {
return date;
}
date = new Date();
self.setEndDate(date);
return date;
}
Prometheus.Graph.prototype.setEndDate = function(date) {
var self = this;
dateString = date.getFullYear() + '-' + (date.getMonth()+1) + '-' + date.getDate() + ' ' +
date.getHours() + ':' + date.getMinutes();
self.endDate.val("");
self.endDate.appendDtpicker({"current": dateString});
};
Prometheus.Graph.prototype.increaseEnd = function() {
var self = this;
self.setEndDate(new Date(self.getOrSetEndDate() + self.parseRange(self.rangeInput.val()) * 1000/2 )) // increase by 1/2 range & convert ms in s
self.submitQuery();
};
Prometheus.Graph.prototype.decreaseEnd = function() {
var self = this;
self.setEndDate(new Date(self.getOrSetEndDate() - self.parseRange(self.rangeInput.val()) * 1000/2 ))
self.submitQuery();
};
Prometheus.Graph.prototype.submitQuery = function() {
var self = this;
self.spinner.show();
self.evalStats.empty();
var startTime = new Date().getTime();
var rangeSeconds = self.parseRange(self.rangeInput.val());
self.queryForm.find("input[name=range]").val(rangeSeconds);
var resolution = self.queryForm.find("input[name=step_input]").val() || Math.max(Math.floor(rangeSeconds / 250), 1);
self.queryForm.find("input[name=step]").val(resolution);
var endDate = self.getEndDate() / 1000;
self.queryForm.find("input[name=end]").val(endDate);
$.ajax({
method: self.queryForm.attr("method"),
url: self.queryForm.attr("action"),
dataType: "json",
data: self.queryForm.serialize(),
success: function(json, textStatus) {
if (json.Type == "error") {
alert(json.Value);
return;
}
self.data = self.transformData(json);
if (self.data.length == 0) {
alert("No datapoints found.");
return;
}
self.updateGraph(true);
},
error: function() {
alert("Error executing query!");
},
complete: function() {
var duration = new Date().getTime() - startTime;
self.evalStats.html("Load time: " + duration + "ms, resolution: " + resolution + "s");
self.spinner.hide();
}
});
};
Prometheus.Graph.prototype.metricToTsName = function(labels) {
var tsName = labels["name"] + "{";
var labelStrings = [];
for (label in labels) {
if (label != "name") {
labelStrings.push(label + "='" + labels[label] + "'");
}
}
tsName += labelStrings.join(",") + "}";
return tsName;
};
Prometheus.Graph.prototype.parseValue = function(value) {
if (value == "NaN" || value == "Inf" || value == "-Inf") {
return 0; // TODO: what should we really do here?
} else {
return parseFloat(value);
}
};
Prometheus.Graph.prototype.transformData = function(json) {
self = this;
var palette = new Rickshaw.Color.Palette();
if (json.Type != "matrix") {
alert("Result is not of matrix type! Please enter a correct expression.");
return [];
}
var data = json.Value.map(function(ts) {
return {
name: self.metricToTsName(ts.Metric),
data: ts.Values.map(function(value) {
return {
x: value.Timestamp,
y: self.parseValue(value.Value)
}
}),
color: palette.color()
};
});
Rickshaw.Series.zeroFill(data);
return data;
};
Prometheus.Graph.prototype.showGraph = function() {
var self = this;
self.rickshawGraph = new Rickshaw.Graph({
element: self.graph[0],
height: Math.max($(window).height() - 200, 100),
width: Math.max($(window).width() - 200, 200),
renderer: (self.stacked.is(":checked") ? "stack" : "line"),
interpolation: "linear",
series: self.data
});
var xAxis = new Rickshaw.Graph.Axis.Time({ graph: self.rickshawGraph });
var yAxis = new Rickshaw.Graph.Axis.Y({
graph: self.rickshawGraph,
tickFormat: Rickshaw.Fixtures.Number.formatKMBT,
});
self.rickshawGraph.render();
};
Prometheus.Graph.prototype.updateGraph = function(reloadGraph) {
var self = this;
if (self.data.length == 0) { return; }
self.legend.empty();
if (self.rickshawGraph == null || reloadGraph) {
self.graph.empty();
self.showGraph();
} else {
self.rickshawGraph.configure({
renderer: (self.stacked.is(":checked") ? "stack" : "line"),
interpolation: "linear",
series: self.data
});
self.rickshawGraph.render();
}
var hoverDetail = new Rickshaw.Graph.HoverDetail({
graph: self.rickshawGraph
});
var legend = new Rickshaw.Graph.Legend({
element: self.legend[0],
graph: self.rickshawGraph
});
var shelving = new Rickshaw.Graph.Behavior.Series.Toggle({
graph: self.rickshawGraph,
legend: legend
});
self.changeHandler();
};
function parseGraphOptionsFromUrl() {
var hashOptions = window.location.hash.slice(1);
if (!hashOptions) {
return [];
}
var optionsJSON = decodeURIComponent(window.location.hash.slice(1));
return JSON.parse(optionsJSON);
}
function storeGraphOptionsInUrl(options) {
var allGraphsOptions = [];
for (var i = 0; i < graphs.length; i++) {
allGraphsOptions.push(graphs[i].getOptions());
}
var optionsJSON = JSON.stringify(allGraphsOptions);
window.location.hash = encodeURIComponent(optionsJSON);
}
function addGraph(options) {
var graph = new Prometheus.Graph($("#graph_container"), options);
graphs.push(graph);
graph.onChange(function() {
storeGraphOptionsInUrl();
});
}
function init() {
jQuery.ajaxSetup({
cache: false
});
var options = parseGraphOptionsFromUrl();
if (options.length == 0) {
options.push({});
}
for (var i = 0; i < options.length; i++) {
addGraph(options[i]);
}
$("#add_graph").click(function() { addGraph({}); });
}
$(init);