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Resource Efficiency vs. Flow Efficiency, Part 4: Defining Accountability


This is the next in a series of posts about resource efficiency vs. flow efficiency: Resource Efficiency vs. Flow Efficiency, Part 1: Seeing Your System Resource Efficiency vs. Flow Efficiency, Part 2: Effect on People Resource Efficiency vs. Flow Efficiency, Part 3: Managing Performance Managers new to agile often ask, “How do I know people will be accountable?” Let’s tease ...

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Software Requirements: How to find out what users want | Part 2


In my last blog post we talked about the different types of software requirements. But how do you generate them, in the first place? What about practical strategies? How do you find out if you are hallucinating or if you really stumbled upon something the masses might want? And how do you find out about those hidden requirements? Let’s roll! ...

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Clojure web development – state of the art


It’s now more than a year that I’m getting familiar with Clojure and the more I dive into it, the more it becomes the language. Once you defeat the “parentheses fear”, everything else just makes the difference: tooling, community, good engineering practices. So it’s now time for me to convince others. In this post I’ll try to walktrough a simple ...

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Using the esp8266 as host for I2C sensors


For my outdoor sensors I used an RaspberryPi with BMP180 + TSL2561 connected via I2C transferring the sensor data as MQTT messages. During an IoT Meetup Session at codecentric office in Frankfurt we discussed the usage of an esp8266 and I was thrilled to get one and play with it. It turns out very quickly that the esp8266 is a really great ...

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Spring Cloud Sidecar


I have an application deployed to a NetflixOSS based cloud which has a structure along these lines: Essentially a service which persists information to a Cassandra cluster. All the applications are registered to Eureka – so in this instance the service as well as the Cassandra nodes are registered with Eureka, further the service connects to the Cassandra cluster by ...

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Building A Chat App With Codename One Part 6 – Codename One


This will be the last installment of this tutorial which was pretty complete in the previous section already. We might have additional installments mostly for covering enhancements such as “invite a friend” and other similar capabilites but this is probably as good a place as any to finish the app and let you try it live. Native Push Up until ...

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Benchmarking Aurora vs MySQL: Is Amazon’s New DB Really 5x Faster?


Amazon Aurora: The next generation of hosted database services put to the test In this post we’re taking a closer look at Amazon Aurora to see how it fares against MySQL and if it delivers on the promise of a 5x performance boost. Recently reaching general availability, Aurora is Amazon’s home grown MySQL compatible database. Currently available on three AWS regions ...

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A look on CDI 2.0 EDR1


CDI is one of the best additions to Java EE of the recent. This opinion is widely shared amongst users and integrators. CDI 1.2, the current version, was released in April, 2014. Now in mid-2015, we face the early draft review of the CDI 2.0 spec. CDI 2.0 will run on Java 8 and higher. The final release is scheduled ...

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The Full Stack Developer


I read The full stack developer is a myth story written by Scott Hadfield the other day. Once I got through the post, I realized a couple of things. The first major point is, there’s no uniform understanding what full stack developer means. More issues are the views of the commenters to the article and the opinion of companies mentioned ...

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