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