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(function(window) {
// cache the templates we use on this page as global variables (asynchronously)
jQuery.get(getRelativePath("../components/hystrixThreadPool/templates/hystrixThreadPool.html"), function(data) {
htmlTemplate = data;
});
jQuery.get(getRelativePath("../components/hystrixThreadPool/templates/hystrixThreadPoolContainer.html"), function(data) {
htmlTemplateContainer = data;
});
function getRelativePath(path) {
var p = location.pathname.slice(0, location.pathname.lastIndexOf("/")+1);
return p + path;
}
/**
* Object containing functions for displaying and updating the UI with streaming data.
*
* Publish this externally as "HystrixThreadPoolMonitor"
*/
window.HystrixThreadPoolMonitor = function(index, containerId) {
var self = this; // keep scope under control
this.containerId = containerId;
/**
* Initialization on construction
*/
// intialize various variables we use for visualization
var maxXaxisForCircle="40%";
var maxYaxisForCircle="40%";
var maxRadiusForCircle="125";
var maxDomain = 2000;
self.circleRadius = d3.scale.pow().exponent(0.5).domain([0, maxDomain]).range(["5", maxRadiusForCircle]); // requests per second per host
self.circleYaxis = d3.scale.linear().domain([0, maxDomain]).range(["30%", maxXaxisForCircle]);
self.circleXaxis = d3.scale.linear().domain([0, maxDomain]).range(["30%", maxYaxisForCircle]);
self.colorRange = d3.scale.linear().domain([10, 25, 40, 50]).range(["green", "#FFCC00", "#FF9900", "red"]);
self.errorPercentageColorRange = d3.scale.linear().domain([0, 10, 35, 50]).range(["grey", "black", "#FF9900", "red"]);
/**
* We want to keep sorting in the background since data values are always changing, so this will re-sort every X milliseconds
* to maintain whatever sort the user (or default) has chosen.
*
* In other words, sorting only for adds/deletes is not sufficient as all but alphabetical sort are dynamically changing.
*/
setInterval(function() {
// sort since we have added a new one
self.sortSameAsLast();
}, 1000)
/**
* END of Initialization on construction
*/
/**
* Event listener to handle new messages from EventSource as streamed from the server.
*/
/* public */ self.eventSourceMessageListener = function(e) {
var data = JSON.parse(e.data);
if(data) {
data.index = self.index;
// check for reportingHosts (if not there, set it to 1 for singleHost vs cluster)
if(!data.reportingHosts) {
data.reportingHosts = 1;
}
if(data && data.type == 'HystrixThreadPool') {
if (data.deleteData == 'true') {
deleteThreadPool(data.escapedName);
} else {
displayThreadPool(data);
}
}
}
}
/**
* Pre process the data before displying in the UI.
* e.g Get Averages from sums, do rate calculation etc.
*/
function preProcessData(data) {
validateData(data);
// escape string used in jQuery & d3 selectors
data.escapedName = data.name.replace(/([ !"#$%&'()*+,./:;<=>?@[\]^`{|}~])/g,'\\$1') + '_' + data.index;
// do math
converAllAvg(data);
calcRatePerSecond(data);
}
function converAllAvg(data) {
convertAvg(data, "propertyValue_queueSizeRejectionThreshold", false);
// the following will break when it becomes a compound string if the property is dynamically changed
convertAvg(data, "propertyValue_metricsRollingStatisticalWindowInMilliseconds", false);
}
function convertAvg(data, key, decimal) {
if (decimal) {
data[key] = roundNumber(data[key]/data["reportingHosts"]);
} else {
data[key] = Math.floor(data[key]/data["reportingHosts"]);
}
}
function calcRatePerSecond(data) {
var numberSeconds = data["propertyValue_metricsRollingStatisticalWindowInMilliseconds"] / 1000;
var totalThreadsExecuted = data["rollingCountThreadsExecuted"];
if (totalThreadsExecuted < 0) {
totalThreadsExecuted = 0;
}
data["ratePerSecond"] = roundNumber(totalThreadsExecuted / numberSeconds);
data["ratePerSecondPerHost"] = roundNumber(totalThreadsExecuted / numberSeconds / data["reportingHosts"]);
}
function validateData(data) {
assertNotNull(data,"type");
assertNotNull(data,"name");
// assertNotNull(data,"currentTime");
assertNotNull(data,"currentActiveCount");
assertNotNull(data,"currentCompletedTaskCount");
assertNotNull(data,"currentCorePoolSize");
assertNotNull(data,"currentLargestPoolSize");
assertNotNull(data,"currentMaximumPoolSize");
assertNotNull(data,"currentPoolSize");
assertNotNull(data,"currentQueueSize");
assertNotNull(data,"currentTaskCount");
assertNotNull(data,"rollingCountThreadsExecuted");
assertNotNull(data,"rollingMaxActiveThreads");
assertNotNull(data,"reportingHosts");
assertNotNull(data,"propertyValue_queueSizeRejectionThreshold");
assertNotNull(data,"propertyValue_metricsRollingStatisticalWindowInMilliseconds");
}
function assertNotNull(data, key) {
if(data[key] == undefined) {
if (key == "dependencyOwner") {
data["dependencyOwner"] = data.name;
} else {
throw new Error("Key Missing: " + key + " for " + data.name)
}
}
}
/**
* Method to display the THREAD_POOL data
*
* @param data
*/
/* private */ function displayThreadPool(data) {
try {
preProcessData(data);
} catch (err) {
log("Failed preProcessData: " + err.message);
return;
}
// add the 'addCommas' function to the 'data' object so the HTML templates can use it
data.addCommas = addCommas;
// add the 'roundNumber' function to the 'data' object so the HTML templates can use it
data.roundNumber = roundNumber;
var addNew = false;
// check if we need to create the container
if(!$('#THREAD_POOL_' + data.escapedName).length) {
// it doesn't exist so add it
var html = tmpl(htmlTemplateContainer, data);
// remove the loading thing first
$('#' + containerId + ' span.loading').remove();
// get the current last column and remove the 'last' class from it
$('#' + containerId + ' div.last').removeClass('last');
// now create the new data and add it
$('#' + containerId + '').append(html);
// add the 'last' class to the column we just added
$('#' + containerId + ' div.monitor').last().addClass('last');
// add the default sparkline graph
d3.selectAll('#graph_THREAD_POOL_' + data.escapedName + ' svg').append("svg:path");
// remember this is new so we can trigger a sort after setting data
addNew = true;
}
// set the rate on the div element so it's available for sorting
$('#THREAD_POOL_' + data.escapedName).attr('rate_value', data.ratePerSecondPerHost);
// now update/insert the data
$('#THREAD_POOL_' + data.escapedName + ' div.monitor_data').html(tmpl(htmlTemplate, data));
// set variables for circle visualization
var rate = data.ratePerSecondPerHost;
// we will treat each item in queue as 1% of an error visualization
// ie. 5 threads in queue per instance == 5% error percentage
var errorPercentage = data.currentQueueSize / data.reportingHosts;
updateCircle('#THREAD_POOL_' + data.escapedName + ' circle', rate, errorPercentage);
if(addNew) {
// sort since we added a new circuit
self.sortSameAsLast();
}
}
/* round a number to X digits: num => the number to round, dec => the number of decimals */
/* private */ function roundNumber(num) {
var dec=1; // we are hardcoding to support only 1 decimal so that our padding logic at the end is simple
var result = Math.round(num*Math.pow(10,dec))/Math.pow(10,dec);
var resultAsString = result.toString();
if(resultAsString.indexOf('.') == -1) {
resultAsString = resultAsString + '.';
for(var i=0; i parseInt(maxXaxisForCircle)) {
newXaxisForCircle = maxXaxisForCircle;
}
var newYaxisForCircle = self.circleYaxis(rate);
if(parseInt(newYaxisForCircle) > parseInt(maxYaxisForCircle)) {
newYaxisForCircle = maxYaxisForCircle;
}
var newRadiusForCircle = self.circleRadius(rate);
if(parseInt(newRadiusForCircle) > parseInt(maxRadiusForCircle)) {
newRadiusForCircle = maxRadiusForCircle;
}
d3.selectAll(cssTarget)
.transition()
.duration(400)
.attr("cy", newYaxisForCircle)
.attr("cx", newXaxisForCircle)
.attr("r", newRadiusForCircle)
.style("fill", self.colorRange(errorPercentage));
}
/* private */ function deleteThreadPool(poolName) {
$('#THREAD_POOL_' + poolName).remove();
}
}
// public methods for sorting
HystrixThreadPoolMonitor.prototype.sortByVolume = function() {
var direction = "desc";
if(this.sortedBy == 'rate_desc') {
direction = 'asc';
}
this.sortByVolumeInDirection(direction);
}
HystrixThreadPoolMonitor.prototype.sortByVolumeInDirection = function(direction) {
this.sortedBy = 'rate_' + direction;
$('#' + this.containerId + ' div.monitor').tsort({order: direction, attr: 'rate_value'});
}
HystrixThreadPoolMonitor.prototype.sortAlphabetically = function() {
var direction = "asc";
if(this.sortedBy == 'alph_asc') {
direction = 'desc';
}
this.sortAlphabeticalInDirection(direction);
}
HystrixThreadPoolMonitor.prototype.sortAlphabeticalInDirection = function(direction) {
this.sortedBy = 'alph_' + direction;
$('#' + this.containerId + ' div.monitor').tsort("p.name", {order: direction});
}
HystrixThreadPoolMonitor.prototype.sortByMetricInDirection = function(direction, metric) {
$('#' + this.containerId + ' div.monitor').tsort(metric, {order: direction});
}
// this method is for when new divs are added to cause the elements to be sorted to whatever the user last chose
HystrixThreadPoolMonitor.prototype.sortSameAsLast = function() {
if(this.sortedBy == 'alph_asc') {
this.sortAlphabeticalInDirection('asc');
} else if(this.sortedBy == 'alph_desc') {
this.sortAlphabeticalInDirection('desc');
} else if(this.sortedBy == 'rate_asc') {
this.sortByVolumeInDirection('asc');
} else if(this.sortedBy == 'rate_desc') {
this.sortByVolumeInDirection('desc');
} else if(this.sortedBy == 'error_asc') {
this.sortByErrorInDirection('asc');
} else if(this.sortedBy == 'error_desc') {
this.sortByErrorInDirection('desc');
} else if(this.sortedBy == 'lat90_asc') {
this.sortByMetricInDirection('asc', 'p90');
} else if(this.sortedBy == 'lat90_desc') {
this.sortByMetricInDirection('desc', 'p90');
} else if(this.sortedBy == 'lat99_asc') {
this.sortByMetricInDirection('asc', 'p99');
} else if(this.sortedBy == 'lat99_desc') {
this.sortByMetricInDirection('desc', 'p99');
} else if(this.sortedBy == 'lat995_asc') {
this.sortByMetricInDirection('asc', 'p995');
} else if(this.sortedBy == 'lat995_desc') {
this.sortByMetricInDirection('desc', 'p995');
} else if(this.sortedBy == 'latMean_asc') {
this.sortByMetricInDirection('asc', 'pMean');
} else if(this.sortedBy == 'latMean_desc') {
this.sortByMetricInDirection('desc', 'pMean');
} else if(this.sortedBy == 'latMedian_asc') {
this.sortByMetricInDirection('asc', 'pMedian');
} else if(this.sortedBy == 'latMedian_desc') {
this.sortByMetricInDirection('desc', 'pMedian');
}
}
// default sort type and direction
this.sortedBy = 'alph_asc';
// a temporary home for the logger until we become more sophisticated
function log(message) {
console.log(message);
};
function addCommas(nStr){
nStr += '';
if(nStr.length <=3) {
return nStr; //shortcut if we don't need commas
}
x = nStr.split('.');
x1 = x[0];
x2 = x.length > 1 ? '.' + x[1] : '';
var rgx = /(\d+)(\d{3})/;
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '$1' + ',' + '$2');
}
return x1 + x2;
}
})(window)
