To do this we use Hibernate Envers. There are 3 easy steps to adding change logging to the data in your existing Play Framework app (I am using 1.2.4 – version 2 may well be different): Add the library Add the standard configuration Add an annotation to each cl...

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I fundamentally don’t understand SQL JOIN clauses. That’s not to say I can’t read and parse them, I just don’t understand them well enough to be able to write them and be confident of exactly what’s happening. In my brain, this means I fail some kind of test. I think that being able to naturally understand and write JOIN clauses is pr...

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Danger! Mental dumping ground ahead! Like loads of other IT people in the UK, I’ve been pretty worried about the forthcoming compulsory centralised ID database in the UK. I’ve previously written to my MP, joined ORG and tried to spre...

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More namespaces: Coarse grain trust Fine-grain trust Relationships to people (family and friends/enemies) All courtesy of

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