The Journal

Field notes from four decades of building systems that scale.

Architecture, machine intelligence, engineering leadership — written for technical leaders who'd rather build than speculate.

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ebean · JAN 04 · 2013

Play Framework 2.0, Ebean Lazy Loading and Object References that are null

I began having sporadic problems in my Play Framework 2.0.4 application where the attributes of referenced objects were null.

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PlayFramework · JAN 02 · 2013

Play 2 Framework and Secure Social Example Setup

If you want to add Authentication to a Play! Framework 2 project, Secure Social is the way to go.  I had some problems installing it despite the documentation and examples.  Here are my tips based on...

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DEC 15 · 2011

How I rolled my own Dropbox like sharing with SparkleShare

I have been looking for over a year for a way to have the simple syncing between computers like DropBox does, but on my own server, without space limits. I also just started using git this...

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MAR 15 · 2011

Using git with Spring Roo and the git addon

Spring Roo finally has an installable git addon (since Version 1.1.2) which will setup, config and auto commit your files to git for you.

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MAR 04 · 2011

Integrating a Spring Roo based Vaadin Form in Magnolia CMS

Now that Magnolia-CMS (http://www.magnolia-cms.com ) is switching to Vaadin for the Administration Screens, I have decided to try and integrate a Spring Roo generated Vaadin Form as a paragraph in a Magnolia Page.

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FEB 11 · 2011

Adding a new Theme to a Spring Roo Project

Yes it would be good idea for a simple addon, but until someone (or myself) get around to writing one, here is the solution for the impatient:

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JAN 27 · 2011

How to Classify Tweets with Google’s Prediction API

Ok, I know this should be easy, but I just wanted to try it out as a first step.  So my goal was to classify some tweets with Google’s Prediction API. Luckily they have a sample...

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JAN 27 · 2011

The Top 10 Google API’s & Developer Tools to watch in 2011

Thanks to @frischkopp I just saw the periodic table of Google APIs & Developer Products. http://code.google.com/more/table/ So I thought you’d like to see my Top 10 List of the ones I am excited about or plan...

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java · JAN 19 · 2011

Spring Roo with Vaadin and the Experimental Visual Editor

I just read about how to get the experimental Vaadin Visual Editor running, so I had to try it with a Roo project. This is what it looked like with the Roo Vote sample app:

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DEC 30 · 2010

Date Range Parameters in Jasper Reports with SQL Server

Ok, to some this might be obvious but I just spent about 4 hours trying to figure out how to use parameters to select a date range in a Jasper Report report based on a JDBC...

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