Sessions at eurucamp 2012 on Saturday 18th August

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  • Sinatra in 8 lines, or How to do crazy stuff with Ruby

    by The Konstantin

    A fun code analysis.

    At 9:45am to 10:15am, Saturday 18th August

    In Hotel Müggelsee Berlin

  • ZeroMQ: Scriptable Sockets

    by Lourens Naudé

    ZeroMQ is a socket abstraction and concurrency framework that's changing
    the way we think and reason about distributed systems. Mailboxes, atomic
    message delivery and swappable transports allow for fast, flexible and
    resilient network topologies. Its I/O model also sits very well with
    all Ruby implementations. In this talk we'll discuss:

    • What's wrong with socket I/O ?
    • Supported messaging patterns
    • Transport agnostic messaging
    • Resiliency (operations and upgrades)
    • Building out topologies just in time (interjection principle)
    • Performance and throughput
    • The Mongrel2 Ruby adapter
    • How to use it from Ruby
    • Small case study

    At 10:15am to 10:45am, Saturday 18th August

    In Hotel Müggelsee Berlin

    Coverage slide deck

  • Using slanger and websockets to power a warehouse backend

    by Jana Vogel

    Websockets are fun for chats and online games. But are there serious
    uses? We developed a warehousing interface using websockets and slanger
    that enables every workstation to see all current shipments in realtime.
    With only Firefox or Chrome as target platforms, this was an easy and
    pleasurable task. This talk will run you through the details of such a
    system from front to back and also show the most common pitfalls so that
    you don’t have to find them out yourself.

    At 11:00am to 11:15am, Saturday 18th August

    In Hotel Müggelsee Berlin

    Coverage slide deck

  • Ruby on the Command Line

    by Piotr Szotkowski

    Ruby, thanks to its various frameworks, is known to be *the* language
    for web applications – and recent developments in graphic libraries
    make it a worthy contestant in the world of GUI-driven desktop
    programs. But Ruby is also great for writing command-line applications;
    the ability to mix no-boilerplate top-level functions with full-fledged
    OOP means its usage can vary from one-off trivial scripts to
    complicated, option-heavy command-line powerhouses.

    This talk presents the nuts and bolts of writing a command-line
    application with Ruby – from option parsing and accessing standard
    input/output to playing nicely with POSIX standards like exit codes and
    signal/interrupt handling.

    At 11:15am to 11:30am, Saturday 18th August

    In Hotel Müggelsee Berlin

  • Writing a Rails Engine

    by Erik Michaels-Ober

    As of Rails 3.2, plugins are officially deprecated. They have been
    replaced by Rails Engines, a class of public methods for hooking into
    Rails applications. This session will explain how to write a Rails Engine
    from scratch or convert your existing plugin to an engine. It will also
    cover best practices for making your engine play well with others and
    determing when to factor pieces of your existing Rails application code
    into an engine, for reuse across multiple applications.

    At 11:30am to 12:00pm, Saturday 18th August

    In Hotel Müggelsee Berlin

  • Do I need DI?

    by James Coglan

    There's been much talk in the Rails community lately about more strongly
    object-oriented approaches to design. The argument goes, we should create
    more maintainable applications through modular code, focusing on the
    Single Responsibility Principle, Dependency Injection, and so on. These
    approaches tend to be talked about in quite abstract terms, cited as
    being 'good for testing' or simply 'the right way to do OOP'. But really
    they're just a means to an end: how do you know when one of these
    approaches is good for you?

    In this talk you'll see several examples of the real-world uses of dependency
    injection I've used in my own projects. You'll say how and why DI emerges
    from the program's design goals, how it affects the implementation, and
    what effects it has on the project's structure, and you should gain enough
    understanding to judge when to introduce it in your own work.

    At 12:00pm to 12:30pm, Saturday 18th August

    In Hotel Müggelsee Berlin

    Coverage slide deck

  • RubyMotion: Ruby In Your Pocket

    by Laurent Sansonetti

    RubyMotion is a revolutionary toolchain for iOS development using Ruby.
    With RubyMotion, developers can finally write full-fledged native iOS
    apps in Ruby, the language you all know and love. In this session, we will
    cover what RubyMotion is and how easy it is to write an app with it.

    At 5:00pm to 5:30pm, Saturday 18th August

    In Hotel Müggelsee Berlin

  • Idempotence as the holy grail of scaling

    by Srdan Kvrgic

    One of the biggest challenges when handling big data is making sure your
    system is coherent after an unexpected crash or machine failure. Designing
    your system for idempotency will make sure you can reprocess parts of your
    data to fill in the gaps without accidentally affecting the good data.

    Once you've got the idempotency down, you are free to venture boldly into
    a veritable Narnia* of scaling solutions.

    This talk will describe the problem and offer a couple of solutions by
    looking at some real-life implementations.

    • But, you know… warmer. And with fewer lions.

    At 6:15pm to 6:45pm, Saturday 18th August

    In Hotel Müggelsee Berlin

    Coverage link

  • Clean Docs

    by Chris Berkhout

    A lot of the principles of clean code are forgotten when writing documentation.

    Have a single source of truth and don't repeat yourself. Avoid writing brittle code. Use ubiquitous terminology and choose searchable names. Be consistent in your formatting. Test your code. Refactor and practise successive refinement. Don't write any more than you need to.

    These principles of clean code can be applied with great effect to the production and maintenance of documentation, but there's more to it than that. Code needs to satisfy machines and coders. Documentation needs to satisfy people who perform a range of different tasks: from cursory inspection through to intensive development.

    This talk will review relevant principles and examine real-world examples, leaving you with a practical mental checklist for writing documentation that will help your users and your software thrive.

    At 6:45pm to 7:00pm, Saturday 18th August

    In Hotel Müggelsee Berlin

  • Superheroes can do it and so can you!

    by Florian Hanke

    You don't know it yet, but you're like Peter Parker, before he was bitten by a radioactive spider. You're Bruce Wayne, before his parents were killed. You're the daughter of Hyppolyta and Zeus.

    How are you putting your abilities to use? You're probably already giving back to the tech community by writing great open source projects. However, you can make a much greater difference by stepping outside your field for a moment – and by returning afterwards, with new ideas, and experiences.

    I'll show one example of this – doing field work in preserving endangered languages in Papua New Guinea, using my knowledge in technology. With Google stepping in to help save Endangered Languages, this is rapidly becoming a topic of great importance.

    Chances are, you can't just run away to a strange faraway place. So what can you do, right now? What's your calling? Follow it!

    At 7:00pm to 7:15pm, Saturday 18th August

    In Hotel Müggelsee Berlin

  • Living in the data mapping world

    by Piotr Solnica

    Ideas we've been talking about for the last couple of years are finally
    becoming a reality, and DataMapper 2 is shaping up this year. I'll
    show you what it's like to say good bye to ActiveRecord -- it's awesome,
    you'll see.

    At 7:30pm to 8:00pm, Saturday 18th August

    In Hotel Müggelsee Berlin

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