At the time of this writing, there are a gazillion ways to print dates in Java: SimpleDateFormat (deprecated, use java.time instead)Joda time (deprecated, use java.time instead)Threeten (deprecated, use java.time instead)Java 8 Date/Time API (also known as java.time) <== This. You should be

Our users need to upload an image to modify their account avatar or the banner to be used for an event. Leaving aside image cropping, resizing and format – which are more than enough for a separate post –, we will focus on uploading files using Signed URLs on GCS. There are

We are implementing paid plans on Koliseo (free, professional, enterprise) using Stripe Subscriptions. Long story short, this is the output from Stripe CLI when a user switches from a free to a paid plan using Stripe Checkout:   2020-09-05 08:33:23 --> charge.succeeded [evt_1HNuxiIsiuZOrhXKxQmevmbT] 2020-09-05 08:33:

We have been playing with multithreading in Java for some time and would like to share our findings, and how they have changed the way we understand the concurrency model. Please understand that we are no experts on this. When we started, this is what we knew: Creating threads is

It's not widely documented how to do this, right? You have a test suite that you want to run against Firestore emulator, which should get started and stopped automatically while the tests are running. In this case, we will be using Java. Connecting to local Firestore is quite straightforward, though

As many developers out there, we used to concatenate and minify our JavaScript codebases, because performance matters. We would try to reduce as much as possible the number of requests to the server, and maybe extract our most repeated dependencies (react, date-fns, maybe one or two lodash libraries not yet

Cloud Build is a managed CI/CD environment, of which we are happy users. However, our test suite was taking about ten minutes to run, so we thought about speeding things up by caching our dependencies on GCS.

Our engineering team often finds issues that we qualify as "last mile issues": you are 90% there, now there is just an additional 90% of work to finish this. It turns out accessibility is precisely one of these topics. Strike this off as one of those features where we thought

So we were last week doing a small change, as people do, when things transformed – slowly – from a small easy change into a huge refactor thing: It was going to be an easy week, and then we brought a simple CSS refactor to a Yak Shaving party — Koliseo Engineering

For events with hundreds of talks, the selection process is a daunting task. The commitment of some communities can sometimes bring content by the truckload, and having to evaluate hundreds or thousands of proposals is not easy. At three minutes per talk, five hundred proposals can consume 25 hours, pauses

Putting together a diverse agenda with a representative amount of male and female speakers is hard. All events can benefit from a multifaceted discussion, but you need proper tools to help. This is the reason why we have added a new feature to your Request for Proposals that shows talk

Invoicing is like the ugly cousin nobody likes to mention at parties. It's complicated from a legal perspective, full of weird rare cases, and hard to get it right for more than one country. Then there is this thing: past a certain price range, every professional event needs to create

The agenda for this year is the source of truth for Codemotion 2017. It displays up-to-the-minute information, supports filtering by technology and free text, collects feedback about the speakers and favorite talks that you want to attend. Starting this week, the agenda will also work while offline. Well, most of

Today's post is not about us, it's about others. We believe in sharing. We have built our software around the idea than when you open source code, you're not just helping yourself but contributing to help others. This post is about the stuff that we have developed internally at Koliseo,

Software development can be a lot like housework. You can move a table or add a picture, things that everyone will notice as soon as they enter your home. Or you can, say, clean the house, redo the plumbing, paint the outside, huge things that are important but will go

Search Engine Optimization is not an easy topic. In a world full of truths, half-truths and plain lies, it's good to start covering some base facts. If you are new to this, we can recommend The Google Webmaster Academy to get an introduction to SEO, Google Webmaster Forum to find

The best event interface can look like crap if it doesn't include awesome background images to get the point across. At Koliseo we are not shy of experimenting: Include videos in the event page: We did that in the early platform, but it looked awful when real people tried to

You don't hear everyday that someone is planning to lower their prices. This year, using Koliseo to sell your events is cheaper than ever: This is a 56% drop of our old ticket fee. The same fee is applied to all supported means of payment. Free tickets means free of

This is one of these rare situations where we integrated a feature before it was released by Google. A couple of months ago we jumped ahead of the wagon and included actions with our tickets. Last month this feature got out of beta and into GMail mainstream: Now your attendees

Our experience integrating six different OAuth providers has been documented by Extrema Sistemas in their blog. The conclusions: We still kind of love OAuth, despite its problems and inconsistent implementations. Our system is secure with very little work, specially compared with the alternatives. OAuth introduces new security holes, and certainly