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2010 Conferences

OSGi DevCon @ JAX London

February 23 - Keynote titled OSGi in the Enterprise: Agility, Modularity, and Architecture’s Paradox


March 22 - 25 - Tutorial on Modular Architecture

Über Conf

June 14 - 17 - Sessions titled Turtles and Architecture and Patterns of Modular Architecture


July 26 - 30 - Two sessions on rich mobile applications and one on agile development. Half day tutorial on software process improvement.

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re: #apple event "We sold more iPads than any PC manufacturer sold of their entire PC line." 2012-09-12

re: #Apple Event ""Our notebooks now rank #1 in the US in Market share in the last three months." 2012-09-12

Right on. I just won a Best Buy drawing worth $1000. Either that or I won a shiny new virus by clicking the link. Hmm...what to do. 2012-08-29

The #osgi alliance response ( to the @mreinhold #jigsaw announcement ( 2012-08-29

Good Q&A with @mreinhold on project #jigsaw. Modularity will change the way we design and run apps! 2012-08-28

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OSGi DevCon Preview

Filed Under Architecture & Design, Java, OSGi |  

I’ll be at OSGi DevCon next week, having been given the opportunity to present the keynote session on Tuesday. The conference is co-hosted with JAX London. I thought I’d take a moment before jumping on the flight to offer a preview of what I’ll be speaking about.

The Cost of Complexity

The title of the session is OSGi in the Enterprise - Agility, Modularity, and Architecture’s Paradox. We all know that OSGi isn’t a new technology. It’s been around for over a decade. But the recent surge in interest in modularity on the Java platform is overdue. The complexity of software is increasing exponentially. Did you know:

  • In 1990, there were 120 billion lines of code
  • in 2000, there were 250 billion lines of code
  • The number of lines of code doubles every 7 years
  • 50% of development time is spent understanding code
  • 90% of software cost is maintenance and evolution

Let’s put this in perspective using the visual at right (click to enlarge), where we can see that the amount of code doubles every seven years. Pretty staggering! But let’s put this in perspective for what it means over the course of the next seven years, as well. It means that between 2010 and 2017, we’ll produce more code than the total amount of code ever written combined! That’s staggering!

I decided to do a bit of research to see if I could find examples that supported these claims. I did:

  • Since the Spring framework was released in 2002, the number of lines of code has grown more than 500% through the release of Spring framework 2.5 in 2008.
  • FreeBSD contained roughly 8 million lines of code in 2002. In 2009, it was close to 16 million.
  • In 2004, the Linux Kernel contained approximately 6 million lines of code. In 2009, it was around 12 million.

I’m sure many of us have experienced this phenomenon. Systems tend not to get smaller over time. And we also recognize that in almost every way, larger software systems are inherently more difficult to design, build, manage, and maintain than are smaller software systems.

Yet, such phenomenal growth is desirable. We can only hope that the systems we create are in such high demand that we have the opportunity to grow them over time. A software system that doesn’t change, dies. Evolution is a big deal! As Lehman’s law suggests:

As a system evolves, its complexity increases unless work is done to maintain or reduce it.

Add it all up, and there are some key takeaways here. We need something that will help us understand complex systems. We need something that help manage the complexity. We need something that will help ease maintenance. We need something that will help us deal with the natural evolution of software systems. We need something that will allow us deal with the natural architectural shifts that occur as a system grows to accommodate demand. For a long time, a central ingredient has been missing. But not for much longer, because the enterprise will get its OSGi!

For the rest of the story, see you in London.

Source of statistical information above:


5 Responses to “OSGi DevCon Preview”

  1. Gabriel Pop on February 18th, 2010 2:27 pm

    What about the number of developers ? How much has it increased over time ? Any relationship with nr of lines of code ?

  2. Richard on February 19th, 2010 8:14 pm


    Excellent references!

    Clearly in the 70’s & 80’s technologist understood not only code - but had quite sophisticated concepts about System evolution, entropy and complexity.

    I wonder at which point / and why / IT renounced science and became little more than a ‘fashion’ / fad led industry! :(

    Looking forwards to your talk on Tuesday!



  3. OSGi: The Value Proposition: Part II « Adapt and Evolve on February 21st, 2010 11:07 am

    [...] from Kirk’s latest post concerning his JAX keynote … As a system evolves, its complexity increases unless work is done to maintain or reduce [...]

  4. Rui Curado on March 2nd, 2010 6:43 pm


    The developer population is actually decreasing: see

    Software developers becoming scarce (SD Times)

    The impossible equation (Jean Bezivin)

  5. Adell on July 31st, 2015 5:11 pm

    Thhe chicken just had enough amount of spices to still tastte like chicken,
    until that little kick comes in towards the end.
    This will make navigation easier for visitors annd they will have access to necessary information only.
    Forr the most technologically savvy customers, include QR codes onn all printed advertisements.

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