A Node.js script that aggregates Jenkins Build Failure Analyzer plugin statistics from MongoDB to Graphite, failure categories per hour

bfa_categories.js

/*
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//A Node.js script that aggregates Jenkins Build Failure Analyzer plugin
//statistics from MongoDB to Graphite, failure categories per hour

var MongoClient = require('mongodb').MongoClient;
var net = require("net");
var _ = require("underscore");
var utils = require("./utils.js"); //TODO implement your own, see below

MongoClient.connect('mongodb://mongo.mycompany.net:27017/jenkinsbfa', function(err, db) { //TODO change url
    if(err) throw err;

    var failureCausesCollection = db.collection('failureCauses');

    var failureCausesCategories = [];

    console.log("Retrieving failure causes...");
    failureCausesCollection.find().toArray(function(err, docs){
        for(var i = 0; i < docs.length; i++) {
            c = {
                id: docs[i]._id.toHexString(),
                name: docs[i].name,
                categories: docs[i].categories
            };
            if(c.categories == null || c.categories.length <= 0) {
                c.categories = ["undefined"];
            }
            failureCausesCategories.push(c);
        }

        var now = new Date();
        var then = new Date();
        //Three months back, since rescans can happen
        then.setMonth(then.getMonth() - 3);

        var match = {"$match": {
                        "startingTime": {"$gte": then},
                        "result": {"$ne": "ABORTED"},
                        "failureCauses": {$exists:true}
                        }
                    };
        var unwind = {"$unwind": "$failureCauses"};

        var project = { "$project": {
                "startingTime": 1,
                "master": 1,
                "failureCauses.failureCause": 1
            }
        };
        var group = { "$group": {
                "_id": {
                        "hour":               {"$hour": "$startingTime"},
                        "dayOfMonth":         {"$dayOfMonth": "$startingTime"},
                        "month":              {"$month": "$startingTime"},
                        "year":               {"$year": "$startingTime"},
                        "master":             "$master",
                        "failureCause": "$failureCauses.failureCause"
                    },
                "number": {"$sum": 1}
            }
        };

        var collection = db.collection('statistics');

        console.log("Aggregating hourly statistics from ", then, "...");

        collection.aggregate([match, unwind, project, group], function(err, result) {
            if (err !== null) {
                throw err;
            }
            console.log("Retrieved result. Aggregating further...")
            var calculation = [];
            for(i = 0; i < result.length; i++) {
                var item = result[i];
                var id = item._id;
                var time = new Date(id.year, id.month-1, id.dayOfMonth, id.hour, 0, 0, 0);
                var timestamp = time.getTime() / 1000;
                var master = id.master;
                var group = utils.bfaMaster2GraphiteGroup(master); //TODO Implement your own server mapping

                if (group != null) {
                    var failureCause = _.findWhere(failureCausesCategories, {id: id.failureCause.oid.toHexString()});
                    if (failureCause != undefined) {

                        var groupCalculation = _.findWhere(calculation, {group: group});
                        if(groupCalculation == undefined) {
                            console.log("Creating group ", group);
                            groupCalculation = {group: group, categories: []};
                            calculation.push(groupCalculation);
                        }
                        //Loop over each category of the failureCause
                        for(var j = 0; j < failureCause.categories.length; j++) {
                            var cat = failureCause.categories[j].toLowerCase();
                            var catCalculation = _.findWhere(groupCalculation.categories, {category: cat});
                            if(catCalculation == undefined) {
                                catCalculation = {category: cat, timestamps: []};
                                groupCalculation.categories.push(catCalculation);
                            }
                            var ti = _.findWhere(catCalculation.timestamps, {time: timestamp});
                            if(ti == undefined) {
                                ti = {time: timestamp, number: 0};
                                catCalculation.timestamps.push(ti);
                            }
                            ti.number += item.number;

                        }
                    }
                }
            }
            // Let's close the db
            db.close();
            console.log("Connecting to Graphite...")
            var socket = net.createConnection(2003, "graphite.mycompany.net"); //TODO change server name
            socket.on('connect', function() {
                console.log("Socket connected, sending data to Graphite...");
                for(var k = 0; k < calculation.length; k++) {
                    var calc = calculation[k];
                    for(var l = 0; l < calc.categories.length; l++) {
                        var cat = calc.categories[l];
                        var graphitePath = calc.group + ".bfa.categories." + cat.category + ".hourly";
                        for(var m = 0; m < cat.timestamps.length; m++) {
                            var ti = cat.timestamps[m];
                            var line = graphitePath + " " + ti.number + " " + ti.time + "\n";
                            socket.write(line);
                            console.log(line);
                        }
                    }
                }
                //And close the socket
                socket.end();
                console.log("Done");

            }).on("error", function(exception) {
                console.log("Error connecting to graphite: ",exception);
            });
        });

    });

});

I know that's not quite related to this script, but I was curious if you have to have MongoDB database to save any of the stats? If my choice for the storage type is "Jenkins Local", how do I access the database?

There is no way to get stats if you use local storage because this doesn't stats. You MUST configure mongodb backend in order to enable this functionality.