How insure indexing every object with Firebase FlashLight in a ElasticSearch Bonsai Free Instance

Question

Thanks to the tutorial of the FlashLight https://github.com/firebase/flashlight, this is somehow easy to do fulltextsearch with Firebase.

However, if you keep the free E

Answer 1

If you have a bunch of data to index, the Flashlight app will ask ES to index every object on the fly, without any resource access constraint. You have to control/limit the access this share resource with a Semaphore.

Install the Semaphore lib

npm i --save semaphore

Edit the PathMonitor.js file, and limit access to ES resource to 1

PathMonitor.prototype = {
    _init: function () {
        this.sem = require('semaphore')(1);
        this.addMonitor = this.ref.on('child_added', this._process.bind(this, this._childAdded));
        this.changeMonitor = this.ref.on('child_changed', this._process.bind(this, this._childChanged));
        this.removeMonitor = this.ref.on('child_removed', this._process.bind(this, this._childRemoved));
    },
    ...
    _index: function (key, data, callback) {
        var that = this;
        that.sem.take(function () {
            that.esc.index({
                index: that.index,
                type : that.type,
                id   : key,
                body : data
            }, function (error, response) {
                that.sem.leave();
                if (callback) {
                    callback(error, response);
                }
            }.bind(that));
        });
    },
    ...
}

This may not be required in case of paid plan.