prometheus/web/static/js/graph.js

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var Prometheus = Prometheus || {};
var graphs = [];
var graphTemplate;
var SECOND = 1000;
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";
if (self.options["tab"] === undefined) {
self.options["tab"] = 1;
}
// Draw graph controls and container from Handlebars template.
var graphHtml = graphTemplate(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.expr.change(storeGraphOptionsInURL);
self.rangeInput = self.queryForm.find("input[name=range_input]");
self.stackedBtn = self.queryForm.find(".stacked_btn");
self.stacked = self.queryForm.find("input[name=stacked]");
self.insertMetric = self.queryForm.find("select[name=insert_metric]");
self.refreshInterval = self.queryForm.find("select[name=refresh]");
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self.consoleTab = graphWrapper.find(".console");
self.graphTab = graphWrapper.find(".graph_container");
self.tabs = graphWrapper.find("a[data-toggle='tab']");
self.tabs.eq(self.options["tab"]).tab("show");
self.tabs.on("shown.bs.tab", function(e) {
var target = $(e.target);
self.options["tab"] = target.parent().index();
storeGraphOptionsInURL();
if ($("#" + target.attr("aria-controls")).hasClass("reload")) {
self.submitQuery();
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}
});
// Return moves focus back to expr instead of submitting.
self.insertMetric.bind("keydown", "return", function(e) {
self.expr.focus();
self.expr.val(self.expr.val());
return e.preventDefault();
})
self.error = graphWrapper.find(".error").hide();
self.graphArea = graphWrapper.find(".graph_area");
self.graph = self.graphArea.find(".graph");
self.yAxis = self.graphArea.find(".y_axis");
self.legend = graphWrapper.find(".legend");
self.spinner = graphWrapper.find(".spinner");
self.evalStats = graphWrapper.find(".eval_stats");
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self.endDate = graphWrapper.find("input[name=end_input]");
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self.endDate.datetimepicker({
language: 'en',
pickSeconds: false,
});
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if (self.options["end_input"]) {
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self.endDate.data('datetimepicker').setValue(self.options["end_input"]);
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}
self.endDate.change(function() { self.submitQuery() });
self.refreshInterval.change(function() { self.updateRefresh() });
self.isStacked = function() {
return self.stacked.val() === '1';
};
var styleStackBtn = function() {
var icon = self.stackedBtn.find('.glyphicon');
if (self.isStacked()) {
self.stackedBtn.addClass("btn-primary");
icon.addClass("glyphicon-check");
icon.removeClass("glyphicon-unchecked");
} else {
self.stackedBtn.removeClass("btn-primary");
icon.addClass("glyphicon-unchecked");
icon.removeClass("glyphicon-check");
}
};
styleStackBtn();
self.stackedBtn.click(function() {
if (self.isStacked() && self.graphJSON) {
// If the graph was stacked, the original series data got mutated
// (scaled) and we need to reconstruct it from the original JSON data.
self.data = self.transformData(self.graphJSON);
}
self.stacked.val(self.isStacked() ? '0' : '1');
styleStackBtn();
self.updateGraph();
});
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self.queryForm.submit(function() {
self.consoleTab.addClass("reload");
self.graphTab.addClass("reload");
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self.submitQuery();
return false;
});
self.spinner.hide();
self.queryForm.find("button[name=inc_range]").click(function() { self.increaseRange(); });
self.queryForm.find("button[name=dec_range]").click(function() { self.decreaseRange(); });
self.queryForm.find("button[name=inc_end]").click(function() { self.increaseEnd(); });
self.queryForm.find("button[name=dec_end]").click(function() { self.decreaseEnd(); });
self.insertMetric.change(function() {
self.expr.selection("replace", {text: self.insertMetric.val(), mode: "before"});
self.expr.focus(); // refocusing
});
self.populateInsertableMetrics();
if (self.expr.val()) {
self.submitQuery();
}
};
Prometheus.Graph.prototype.populateInsertableMetrics = function() {
var self = this;
$.ajax({
method: "GET",
url: "/api/metrics",
dataType: "json",
success: function(json, textStatus) {
var availableMetrics = [];
for (var i = 0; i < json.length; i++) {
self.insertMetric[0].options.add(new Option(json[i], json[i]));
availableMetrics.push(json[i]);
}
self.expr.typeahead({
source: availableMetrics,
items: "all"
});
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// This needs to happen after attaching the typeahead plugin, as it
// otherwise breaks the typeahead functionality.
self.expr.focus();
},
error: function() {
self.showError("Error loading available metrics!");
},
});
};
Prometheus.Graph.prototype.onChange = function(handler) {
this.changeHandler = handler;
};
Prometheus.Graph.prototype.getOptions = function() {
var self = this;
var options = {};
var optionInputs = [
"expr",
"range_input",
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"end_input",
"step_input",
"stacked"
];
self.queryForm.find("input").each(function(index, element) {
var name = element.name;
if ($.inArray(name, optionInputs) >= 0) {
options[name] = element.value;
}
});
options["tab"] = self.options["tab"];
return options;
};
Prometheus.Graph.prototype.parseDuration = function(rangeText) {
var rangeRE = new RegExp("^([0-9]+)([ywdhms]+)$");
var matches = rangeText.match(rangeRE);
if (!matches) { return };
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.parseDuration(self.rangeInput.val());
for (var i = 0; i < Prometheus.Graph.stepValues.length; i++) {
if (rangeSeconds < self.parseDuration(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.parseDuration(self.rangeInput.val());
for (var i = Prometheus.Graph.stepValues.length - 1; i >= 0; i--) {
if (rangeSeconds > self.parseDuration(Prometheus.Graph.stepValues[i])) {
self.rangeInput.val(Prometheus.Graph.stepValues[i]);
if (self.expr.val()) {
self.submitQuery();
}
return;
}
}
};
Prometheus.Graph.prototype.getEndDate = function() {
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var self = this;
if (!self.endDate || !self.endDate.val()) {
return null;
}
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return self.endDate.data('datetimepicker').getDate().getTime();
};
Prometheus.Graph.prototype.getOrSetEndDate = function() {
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var self = this;
var date = self.getEndDate();
if (date) {
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return date;
}
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date = new Date();
self.setEndDate(date);
return date;
}
Prometheus.Graph.prototype.setEndDate = function(date) {
var self = this;
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self.endDate.data('datetimepicker').setValue(date);
};
Prometheus.Graph.prototype.increaseEnd = function() {
var self = this;
self.setEndDate(new Date(self.getOrSetEndDate() + self.parseDuration(self.rangeInput.val()) * 1000/2 )) // increase by 1/2 range & convert ms in s
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self.submitQuery();
};
Prometheus.Graph.prototype.decreaseEnd = function() {
var self = this;
self.setEndDate(new Date(self.getOrSetEndDate() - self.parseDuration(self.rangeInput.val()) * 1000/2 ))
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self.submitQuery();
};
Prometheus.Graph.prototype.submitQuery = function() {
var self = this;
self.clearError();
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if (!self.expr.val()) {
return;
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}
self.spinner.show();
self.evalStats.empty();
var startTime = new Date().getTime();
var rangeSeconds = self.parseDuration(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);
if (self.queryXhr) {
self.queryXhr.abort();
}
var url;
var success;
if (self.options["tab"] === 0) {
url = self.queryForm.attr("action");
success = function(json, textStatus) { self.handleGraphResponse(json, textStatus); };
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} else {
url = "/api/query";
success = function(text, textStatus) { self.handleConsoleResponse(text, textStatus); };
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}
self.queryXhr = $.ajax({
method: self.queryForm.attr("method"),
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url: url,
dataType: "json",
data: self.queryForm.serialize(),
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success: success,
error: function(xhr, resp) {
if (resp != "abort") {
self.showError("Error executing query: " + resp);
}
},
complete: function() {
var duration = new Date().getTime() - startTime;
self.evalStats.html("Load time: " + duration + "ms <br /> Resolution: " + resolution + "s");
self.spinner.hide();
}
});
};
Prometheus.Graph.prototype.showError = function(msg) {
var self = this;
self.error.text(msg);
self.error.show();
}
Prometheus.Graph.prototype.clearError = function(msg) {
var self = this;
self.error.text('');
self.error.hide();
}
Prometheus.Graph.prototype.updateRefresh = function() {
var self = this;
if (self.timeoutID) {
window.clearTimeout(self.timeoutID);
}
interval = self.parseDuration(self.refreshInterval.val());
if (!interval) { return };
self.timeoutID = window.setTimeout(function() {
self.submitQuery();
self.updateRefresh();
}, interval * SECOND);
}
Prometheus.Graph.prototype.renderLabels = function(labels) {
var labelStrings = [];
for (label in labels) {
if (label != "__name__") {
labelStrings.push("<strong>" + label + "</strong>: " + labels[label]);
}
}
return labels = "<div class=\"labels\">" + labelStrings.join("<br>") + "</div>";
}
Prometheus.Graph.prototype.metricToTsName = function(labels) {
var tsName = (labels["__name__"] || '') + "{";
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var labelStrings = [];
for (label in labels) {
if (label != "__name__") {
labelStrings.push(label + "=\"" + labels[label] + "\"");
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}
}
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 {
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return parseFloat(value);
}
};
Prometheus.Graph.prototype.transformData = function(json) {
self = this;
var palette = new Rickshaw.Color.Palette();
if (json.type != "matrix") {
self.showError("Result is not of matrix type! Please enter a correct expression.");
return [];
}
var data = json.value.map(function(ts) {
return {
name: escapeHTML(self.metricToTsName(ts.metric)),
labels: ts.metric,
data: ts.values.map(function(value) {
return {
x: value[0],
y: self.parseValue(value[1])
}
}),
color: palette.color()
};
});
Rickshaw.Series.zeroFill(data);
return data;
};
Prometheus.Graph.prototype.updateGraph = function() {
var self = this;
if (self.data.length == 0) { return; }
// Remove any traces of an existing graph.
self.legend.empty();
if (self.graphArea.children().length > 0) {
self.graph.remove();
self.yAxis.remove();
}
self.graph = $('<div class="graph"></div>');
self.yAxis = $('<div class="y_axis"></div>');
self.graphArea.append(self.graph);
self.graphArea.append(self.yAxis);
// Now create the new graph.
self.rickshawGraph = new Rickshaw.Graph({
element: self.graph[0],
height: Math.max(self.graph.innerHeight(), 100),
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width: Math.max(self.graph.innerWidth() - 80, 200),
renderer: (self.isStacked() ? "stack" : "line"),
interpolation: "linear",
series: self.data,
min: "auto",
});
var xAxis = new Rickshaw.Graph.Axis.Time({ graph: self.rickshawGraph });
var yAxis = new Rickshaw.Graph.Axis.Y({
graph: self.rickshawGraph,
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orientation: "left",
tickFormat: Rickshaw.Fixtures.Number.formatKMBT,
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element: self.yAxis[0],
});
self.rickshawGraph.render();
var hoverDetail = new Rickshaw.Graph.HoverDetail({
graph: self.rickshawGraph,
formatter: function(series, x, y) {
var swatch = '<span class="detail_swatch" style="background-color: ' + series.color + '"></span>';
var content = swatch + (series.labels["__name__"] || 'value') + ": <strong>" + y + '</strong><br>';
return content + self.renderLabels(series.labels);
}
});
var legend = new Rickshaw.Graph.Legend({
element: self.legend[0],
graph: self.rickshawGraph,
});
var highlighter = new Rickshaw.Graph.Behavior.Series.Highlight( {
graph: self.rickshawGraph,
legend: legend
});
var shelving = new Rickshaw.Graph.Behavior.Series.Toggle({
graph: self.rickshawGraph,
legend: legend
});
self.changeHandler();
};
Prometheus.Graph.prototype.resizeGraph = function() {
var self = this;
if (self.rickshawGraph != null) {
self.rickshawGraph.configure({
width: Math.max(self.graph.innerWidth() - 80, 200),
});
self.rickshawGraph.render();
}
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}
Prometheus.Graph.prototype.handleGraphResponse = function(json, textStatus) {
var self = this
if (json.type == "error") {
self.showError(json.value);
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return;
}
// Rickshaw mutates passed series data for stacked graphs, so we need to save
// the original AJAX response in order to re-transform it into series data
// when the user disables the stacking.
self.graphJSON = json;
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self.data = self.transformData(json);
if (self.data.length == 0) {
self.showError("No datapoints found.");
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return;
}
self.graphTab.removeClass("reload");
self.updateGraph();
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}
Prometheus.Graph.prototype.handleConsoleResponse = function(data, textStatus) {
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var self = this;
self.consoleTab.removeClass("reload");
self.graphJSON = null;
var tBody = self.consoleTab.find(".console_table tbody");
tBody.empty();
switch(data.type) {
case "vector":
if (data.value.length === 0) {
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tBody.append("<tr><td colspan='2'><i>no data</i></td></tr>");
return;
}
for (var i = 0; i < data.value.length; i++) {
var v = data.value[i];
var tsName = self.metricToTsName(v.metric);
tBody.append("<tr><td>" + escapeHTML(tsName) + "</td><td>" + v.value + "</td></tr>");
}
break;
case "matrix":
if (data.value.length === 0) {
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tBody.append("<tr><td colspan='2'><i>no data</i></td></tr>");
return;
}
for (var i = 0; i < data.value.length; i++) {
var v = data.value[i];
var tsName = self.metricToTsName(v.metric);
var valueText = "";
for (var j = 0; j < v.values.length; j++) {
valueText += v.values[j][1] + " @" + v.values[j][0] + "<br/>";
}
tBody.append("<tr><td>" + escapeHTML(tsName) + "</td><td>" + valueText + "</td></tr>")
}
break;
case "scalar":
tBody.append("<tr><td>scalar</td><td>" + data.value + "</td></tr>");
break;
case "error":
self.showError(data.value);
break;
default:
self.showError("Unsupported value type!");
break;
}
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}
function parseGraphOptionsFromURL() {
var hashOptions = window.location.hash.slice(1);
if (!hashOptions) {
return [];
}
var optionsJSON = decodeURIComponent(window.location.hash.slice(1));
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options = JSON.parse(optionsJSON);
return options;
}
// NOTE: This needs to be kept in sync with rules/helpers.go:GraphLinkForExpression!
function storeGraphOptionsInURL() {
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();
});
$(window).resize(function() {
graph.resizeGraph();
});
}
function escapeHTML(string) {
var entityMap = {
"&": "&amp;",
"<": "&lt;",
">": "&gt;",
'"': '&quot;',
"'": '&#39;',
"/": '&#x2F;'
};
return String(string).replace(/[&<>"'\/]/g, function (s) {
return entityMap[s];
});
}
function init() {
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$.ajaxSetup({
cache: false
});
$.ajax({
url: "/static/js/graph_template.handlebar",
success: function(data) {
graphTemplate = Handlebars.compile(data);
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);