• Bernd Zuther
  • @Bernd_Z
  • github.com/zutherb
  • bernd.zuther@codecentric.de

public class TopSellerRecommendationPanel extends AbstractShopBasePanel {

    @SpringBean
    private FeatureToogleBean featureToogleBean;

    ...

    @Override
    protected void onConfigure() {
      super.onConfigure();
      setVisible(featureToogleBean.isTopSellerFeatureEnabled());
    }

    ...

}

• Reduction of development speed
• Increase of turnaround times
• Increase of build time
• Unforeseen behavior after changes
• Increase of time to market
• A/B testing of process changes nearly impossible
• Scalability (e.g. application and teams)

vagrant@app-server-node-4:~$ ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.2  29640  4300 ?        Ss   08:38   0:02 /sbin/init
root         2  0.0  0.0      0     0 ?        S    08:38   0:00 [kthreadd]
root         3  0.0  0.0      0     0 ?        S    08:38   0:02 [ksoftirqd/0]
root         5  0.0  0.0      0     0 ?        S<   08:38   0:00 [kworker/0:0H]
...
vagrant@app-server-node-4:~$ ps aux | grep java
root      1827  1.4  7.2 2458576 149452 ?      Sl   08:39   8:26 java -classpath
/usr/share/shop/product/lib/product-microservice-0.5.5.jar:/usr/share/shop/produ
ct/lib/scala-library-2.10.3.jar:/usr/share/shop/product/lib/akka-actor_2.10-2.2.
4.jar:/usr/share/shop/product/lib/spray-can-1.2.1.jar:/usr/share/shop/product/li
...
vagrant@app-server-node-4:~$ ps aux | grep java | wc -l
6

{
        firstname: "Bernd",
        lastname: "Zuther",
        street: "Elsenheimerstraße 55a",
        city: "München",
        zip: 80687
}

{
        firstname: "Bernd",
        lastname: "Zuther",
        birthday: "1983/08/15",
        street: "Elsenheimerstraße 55a",
        city: "München",
        zip: 80687
}

{
        firstname: "Bernd",
        lastname: "Zuther",
        birthday: "1983/08/15",
        addresses : [{
          street: "Elsenheimerstraße 55a",
          city: "München",
          zip: 80687,
          type: "WORK"
        }]
}

• Don’t break your Customer
• Don’t break the Code Base, Builds, Tests, and Production
• Don’t break the Delivery Flow

{
        firstname: "Bernd",
        lastname: "Zuther",
        birthday: "1983/08/15",
        street: "Elsenheimerstraße 55a",
        city: "München",
        zip: 80687,
        addresses : [{
          street: "Elsenheimerstraße 55a",
          city: "München",
          zip: 80687,
          type: "WORK"
        }]
}