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Divided we Stand: Optional


Our recent article “NULL is Not The Billion Dollar Mistake. A Counter-Rant” got us a lot of reads, controversial comments, and a 50/50 upvote / downvote ratio pretty much everywhere a blog post can be posted and voted on. This was expected. Objectively, NULL is just a “special” value that has been implemented in a variety of languages and type ...

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Regarding team building and bonding – on developer teams


This is something I wanted to write for some months now, especially after my relocation to a new country and a new market. It is about team bonding and performance, in the context of software development teams. A lot of stuff have been written in  books around management or team leading, things like the role of the ‘organization’ aka company, ...

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Comparing Hashing strategies


Overview Chronicle has a number of implementations for hashing, including City and Murmur. It also has it’s own Vanilla Hash, but how was this tested? What is Vanilla Hash? Vanilla Hash is designed to be as simple as possible and be optimised for the Orthogonal Bits test (See below) This was compared with City 1.1 and Murmur 3 hashing strategies. ...

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Use stored procedures with Hibernate


This article show different ways to call stored procedures from hibernate. JDBC actions will not be covered. Postgresql will be used as a database. CREATE DATABASE example; CREATE TABLE company ( company_id BIGSERIAL PRIMARY KEY, name TEXT NOT NULL ); CREATE TABLE benefit ( benefit_id BIGSERIAL PRIMARY KEY, name TEXT, company_id BIGINT, CONSTRAINT fk_company FOREIGN KEY (company_id) REFERENCES company (company_id) ...

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Comments on The Twelve-Factor App


The Twelve-Factor App is a recent methodology (and/or a manifesto) for writing web applications that hopefully is getting quite popular. Although I don’t agree 100% with the recommendations, I ‘ll quickly go through all 12 factors and discuss them in the light of the Java ecosystem, mentioning the absolute “musts” and the points where I disagree. For more, visit the ...

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Why You Should Encrypt ALL Personally Identifiable Information (PII)


Many critics have pointed out that Ashley Madison should have encrypted all personally identifiable information (PII). The database contained sensitive information that would cause harm to users if it was released. We are probably not involved in dating websites based on infidelity, at least not as a developer. But the nature of our business doesn’t matter after a breach – ...

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Setting PostgreSQL psql Variable Based Upon Query Result


When using PostgreSQL‘s psql command-line tool to interact with a PostgreSQL database via operator interaction or script, it is not uncommon to want to set psql variables based on the results of a particular query. While PostgreSQL’s procedural language PL/pgSQL supports approaches such as SELECT INTO and assignment (:=) to set PL/pgSQL variables based on a query result, these approaches ...

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Using Docker to Build Debian Packages


Building Debian packages isn’t always fun. If you’ve ever tried to turn some software into a .deb package, chances are you were either overwhelmed by the sheer number of available build tools and file formats or you messed up your system in an attempt to satisfy all of the package’s dependencies. There are many things that can, and initially will, ...

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Parameterized integration tests with Spring JUnit Rules


Spring 4.2 comes with brand new JUnit rules: SpringClassRule and SpringMethodRule. The main advantage of using JUnit rules is to let developers get rid of SpringJUnit4ClassRunner and utilize different JUnit runners in Spring integration tests. I think the biggest opportunity with Spring JUnit Rules is the ease of creating parameterized integration tests. The code to be tested For the purpose ...

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