An Adjustment in Priorities

I think it is very common this time of year for people to reflect, especially on their accomplishments during the past year, and what they would like to accomplish next year. Personally, I’ve been doing quite a bit of thinking about my development as a software engineer.

It feels as though, over the past couple of years, the pace at which I have been learning has slowed. This troubles me. One of the reasons I love the software industry is that there is always something new to learn. I love learning about new ways to solve problems with technology. And, learning is what you must continue to do if you are to stay relevant as a software engineer.

Now, this doesn’t mean that I haven’t learned anything over the past couple of years. Quite the contrary actually. I’ve really been enjoying the boom our industry is seeing in non relational data storage systems. We’ve been utilizing many of these newer technologies at Signal with great success. I’ve been an active member of the ChicagoDB users group, attended a few conferences on this topic, and even gave a few talks…a first for me. I’ve also been learning first hand how to scale a system as we’ve taken the Signal application from one capable of sending thousands of messages per “blast” to one that regularly sends millions of messages per “blast”.

However, something is missing. I used to read more. I used to blog more. I used make a sincere effort to learn a new programming language every year. I used to constantly download and tinker with new tools. These things have fallen to the wayside. And, I really miss them.

Instead, over the past couple of years, I have been spending the majority of my time creating. When creating a new project, there is usually something new to learn. That’s what drives me to create the project in the first place. But as time goes on, the cost of the time I spend working on the project starts to outweigh the benefit. I reach a point where I am no longer learning anything while working on the project. If I’m not benefiting from working on the project in any way (now that the learning part has mostly dried up), there is little motivation for me to keep working on it.

Part of me feels obligated to keep these projects going, and to get them to a point that I would consider “done”. I’ve never been a quitter, and stopping work on these projects sounds like quitting to me. However, it makes little sense to continue working on something that gives me nothing in return. I will still fix bugs that are reported, but any new development on most of my active projects is likely going to cease. Time is precious, and I need to make the most of it.

So as of right now, I’m making an adjustment in priorities. I’m using my free time to invest in myself. To read more. To blog more. To get back to learning a new programming language a year (Clojure is on tap for 2012…I’ve been wanting to learn it for 3 years now). To resume downloading and tinkering with tools that spark my curiosity. I want to start practicing how to write code, like I learned at the code retreat I attended over the summer.

I’ll still be creating, as I’m someone who learns by doing, but I have a feeling from now on my projects will be much, much smaller.

It is impossible to “find” time to do something. You have to make time.

What I Learned by Attending a Code Retreat

On Tuesday, July 26th, I attended my first code retreat. The code retreat was led by Corey Haines and Tyler Jennings, sponsored by Obtiva, and held to coincide with Tech Week. Simply put, it was invaluable experience, and I can’t wait for the chance to do it again.

What the hell is a code retreat?

For those who have never attended a code retreat, the format is simple. The group is given a problem. In our case the problem was Conway’s Game of Life. The code retreat is then broken up into several 45 minute sessions. Each session you pair with somebody new, and you take a stab at solving some portion of the problem. All code is written using TDD. At the end of each session you delete all of the code you created. The problem, and the time limit on the sessions, are specifically chosen so that there is little to no chance that you will come up with a complete solution in the allowed time. Solving the problem is not the point. The point is to practice.

We as software developers don’t give ourselves enough time to practice. At work, or even with open source or side projects, we’re always trying to get something done. Rarely, if at all, do we practice solely for the sake of practice. This is what we focused on at the code retreat. At the end of each 45 minute session, we deleted our code, and discussed what we learned. We were encouraged to try new ideas, to really push ourselves outside of our comfort zone. Knowing that the code would be deleted in a matter of minutes, there was no need to worry about screwing up the design, or creating something that would ultimately become unmaintainable. We had a safety net, and were encouraged to use it.

Corey said that we never get the chance to write “perfect code”. Perfect code doesn’t exist in the real world. In the real world products need to ship. It is simply not practical to spend the amount of time on a piece of code that is required to make it “perfect”. There are always trade offs of one form or another. However, code retreats give you the opportunity to practice writing perfect code. There is nothing to ship, nothing to “get done”. The code lives for 45 minutes, and then it disappears, giving you a unique opportunity to practice writing tiny pieces of perfect code.

Structured chaos

Sounds pretty hectic, right? But, the sessions were far from unstructured. Throughout the retreat, we were encouraged to keep in mind the four rules of simple design:

  • Runs all the tests
  • No duplication
  • Proper naming (expresses ideas and reveals intent)
  • Small (small methods, small classes)

The morning sessions were primarily focused on getting familiar with the problem. As the day progressed, we were encouraged by Tyler and Corey to try out certain ideas, or to think about tackling old problems in new ways. Can you solve the issue using polymorphism instead of if statements? Can you do it by capping all of your methods to 3 lines? What happens when you focus on proper naming of your tests and your methods? These “challenges” were designed to push us out of our comfort zone. It worked.

Some thoughts

I quickly realized that 45 minutes was not enough time to solve the problem. However, it took me almost the entire day to finally get comfortable with the fact that even solving a significant portion of the problem was out of reach. About half way through the day, I caught myself trying to solve a chunk of the problem that was way too large for the amount of time we were given. This resulted in me rushing a solution in an attempt to get my way too large of scope test to pass. At the end of the session, I was left confused with a pile of crappy code (unnecessary abstractions, no encapsulation, etc), at least half of which I wasn’t sure why we wrote.

I love that feeling you get when you create something, or solve a problem. This is why I am a programmer. Not being able to finish the problem, or even a significant portion of it, was incredibly frustrating. It took me the entire day to finally let go of that.

It was also great to see the different ways people were approaching the problem. At the start of the code retreat most pairs were pursuing a similar approach. But by the end of the day, the variety of approaches was simply amazing. With each session, everybody learned something new. Since we were required to find a new partner for each session, the combined experience of each new team seemed to produce a new approach, slightly different from the approaches each of the partners had tried in previous sessions. It was almost like looking at an old tree. Each session resulted in the forking of each branch on the tree. By then end of the day, there were a whole lot of branches.

Practice, practice, practice…

At the end of the code retreat, we all briefly shared with the group what we learned that day. Everybody had something new to say. The code retreat had a way of showing all of us what we needed to work on and what we needed to explore.

When writing this blog post, it suddenly hit me.

This is exactly what practice is designed to do!

When I practice something else (karate basics or kata for example), it has the same effect. Serious practice makes it very clear what needs to be developed. It makes no difference what it is that you’re practicing. The key to getting better at something is to practice, and to continue developing the “problem areas” identified by your practice. But it can’t be just any practice. As Corey stated during the code retreat:

Practice doesn’t make perfect. Perfect practice makes perfect.

Perhaps the single biggest thing I took away from the code retreat is that it showed me how to practice writing code.

What I learned

First off, I learned that I need to slow down…way down. All too often I think I know the solution to a problem before my fingers even touch the keyboard. And, perhaps worse, is that I am so focused on implementing that solution, that I will often ignore warning signs (code smells) that should be alerting me that my solution may perhaps not be the best solution. This code retreat made me realize that I need to do a much better job of listening to my tests, and listening to my code. I need to do a better job of keeping my nose open at all times for code smells, and to stop when I smell something. Something that doesn’t feel right in the tests is a sure sign that something is wrong with the design. Stop, take a step back, think for a minute about what is causing the smell, and fix it.

There is nothing wrong with having a solution in mind before you start coding. In fact, I think that most times you want to have a solution in mind before your fingers touch the keyboard. However, you should keep an open mind as you start to build your solution. Don’t assume your initial solution is the best solution. In fact, it’s probably safer to assume that it is not, and allow your tests to guide you to a better one.

Go to a code retreat!

If you’re serious about getting better as a programmer, and have never been to a code retreat, your missing out on an incredible learning experience. Make it a point to go to one. Since code retreats are essentially group coding practice, you can attend them over and over and be sure to walk away with something new every time. I’m already looking forward to the next one.

I have so much to learn.

Build Your Own Sandbox Application

Sandboxes are fun. A simple box full of sand, a bucket, and a shovel somehow opens the imagination like nothing else. You can build anything you want, keep it around for a while if you like it, add to it, subtract from it, or crush it in Godzilla like fashion if you so choose. You can experiment with your creation in any way imaginable, without consequence. Creating things in such a carefree environment can be refreshing, and rewarding.

I think that it is a great idea for developers to have such an environment for themselves where they can try out new technologies, techniques, or processes. Setting up a sandbox now-a-days is pretty easy. Machines are cheap, or free if you’re not picky and keep your eyes and ears open. That 4 year old PC that your cousin is throwing away because he got a brand new Dell for Christmas will fit the bill just fine. Linux is free, runs great on older computers, and has the power and flexibility to host virtually any application. Sign up for a free DNS service such as DynDNS and poof, you’ve got yourself a little server that you can reach over the Internet. My sandbox is a dusty old dual Pentium III with 512 MB of RAM, which is running Ubuntu Linux. It fits the bill quite nicely if you ask me.

But a sandbox is only half the equation. For developers, we need an application that we can play with in the sandbox. Something we can poke and prod. A sandbox application so to speak. There are several reasons why you many want to create a sandbox application.

Platform for playing with new technologies

Perhaps the biggest reason for creating and maintaining your own sandbox application is that it can serve as a platform for trying out new technologies. Doing this at work can be tough. Your boss or client may not be thrilled to hear that you completely re-wrote part of the application to use the bleeding edge release of some hot new framework because you “thought it was cool”. But, there’s nothing stopping you from doing it with your own application. Even if you rely heavily on your application, there’s no reason why you can’t fork your code, and give the new technology a try on a separate branch. If it works out you can merge the code into the main branch, and if not you can always abandon the changes. Now, this approach will only work if you have your application under source control (which you should). If you don’t mind giving the world access to your code, GitHub will host your code for free. Otherwise, it’s very easy to setup your own source control system in your sandbox.

Material to blog about

Trying out new technologies, techniques, or processes can also give you plenty of material to blog about. If the technology/technique/process you are tinkering with is hot, it is very likely that many people will be interested in reading about your experience. If you blog frequently about topics that people are interested in, you’ll steadily increase readership. This could be very good for your career, as well known programmers generally don’t have a hard time finding work. Work usually finds them.

Create something that you will use

What’s the point in going through all of this trouble to create something if you never use it? I’ve created a few applications that I use on a regular basis. Not only did these applications address some need that I was currently facing, but having a sandbox application that you actually use means that you will be more likely to maintain and enhance it.

Looks great on a resume

Employers love to hire people who show an interest in their field outside of work. I’ve found that people passionate about their field are usually better at their jobs than those who show up at 9, work on the same ol’ stuff for 8 hours, and go home. Having a sandbox application shows people that you love what you do so much that you have dedicated time outside of work to create something that you care about. This especially holds true if you’ve put serious thought into your application, and are excited to show it off to anybody who asks to see it.

Release it, and potentially help others

One of my colleagues once said,

Your parents lied to you. You are not special. There’s millions of people out there just like you.

He wasn’t trying to be mean, this time :) He was simply pointing out that you are not alone. If you are facing a problem, odds are there are hundreds or thousands (or more) of people out there who are facing that same problem. Releasing your application could be helping all of these people. Perhaps it would help them so much that they would be willing to pay for it. Wouldn’t that be nice?

Open source your application

Open sourcing your application can be great for several reasons. Perhaps you’ve just finished migrating your application to the latest version some framework. Not only can you blog about your experience, but you can share the code with others so that they can see exactly how you did it. This could potentially help others looking to migrate their applications to the same framework. You could get feedback from the community about something you could be doing better, and learn something new. People looking at your code could spot a bug, giving you the opportunity to fix it before it affects you (especially if you use your application). Some employers ask to see source code samples as part of the interview process. What sort of reaction do you think you would get if you immediately spit out several repositories that you owned on GitHub for the prospective employer to browse at their leisure? I’m not sure about you, but I’d be pretty impressed.

However, there is a potential drawback in releasing your code to the world. Ironically, it’s the same as one of the benefits. The world can see your code. This can be a bad thing if your code is full of bugs, or sloppy. So if you plan on releasing your code, take the extra care necessary to ensure that the code reflects your best effort. Your code, and you as a developer, will benefit from the extra TLC.

The next big thing

You never know which crazy, off the wall idea will turn into the next big thing. Who would of thought that there was a real need for an application that lets you tell the world what you’re doing right now. If your idea for a sandbox application turns into something with real business value, then you never know where it will end up. Large companies will often spend big bucks to buy great ideas. I’d imagine it would be pretty cool to be on the receiving end of one of those deals.


Creating a sandbox, and a sandbox application is something that every serious developer should do. If nothing more, it will give you a place to tinker with new technologies and grow as a developer. There is little to no cost to set it up, and your imagination is the only limit.

Really Cool Site Containing Java Conference Videos

Yesterday I stumbled upon It appears that Parleys has been around for a while, providing podcasts of various tech presentations (audio only). However, the new version of the site, still in Beta, takes their offerings to an entirely new level. It now contains several videos of presentations from various Java conferences over the past few years. Not only is the content fantastic, but the user interface is very slick as well. The UI displays not only the audio in sync with the slides, but also a video of the presenter, giving you the full experience. The navigation options are also great, providing a table of contents and a time line for the presentation…letting your jump to a specific point in the talk. In addition, Parley’s provides information about the speaker and the talk, a list of related talks, and the ability to post tags and comments at specific points in the talk.

In my opinion, the best feature provided by is the ability to watch the presentations, with all of the UI features, offline. This is HUGE for me, as I spend almost two hours every day sitting on a train. Parley’s provides an Adobe AIR application that makes all of this possible. Adobe AIR is a runtime environment that “lets developers use proven web technologies to build rich Internet applications that run outside the browser on multiple operating systems”. The Linux version of AIR, still in Beta, works wonderfully. The AIR application operates just like the site, and provides some additional functionality to download the presentations for later viewing.

I’ve been spending quite a bit of time lately looking for a site like this. With the current economic conditions, I’d imagine that most companies are cutting back on the number of conferences they send their developers to. According to the site, they plan on continuing to add content. If they do, I see this as an invaluable resource for keeping up to date on what is going on in the Java community.