Code Freely, Live Fully
Code Freely, Live Fully
Introduction In delegation, you delegate a certain request to an object to a second object, which we call the delegate. This is almost like a subclass sending a request to its parent class. In Go we can achieve this functionality…
Introduction The composite pattern allows you treat a group of objects like a single object. The objects are composed into some form of a tree-structure to make this possible. This patterns solves two problems: We do this by doing the…
Introduction The Bridge pattern is a design pattern that is meant to “decouple an abstraction from its implementation so the two can vary independently”. To that end this pattern can use encapsulation, aggregation and also inheritance in order to separate…
Introduction The Bridge pattern is a design pattern that is meant to “decouple an abstraction from its implementation so the two can vary independently”. To that end this pattern can use encapsulation, aggregation and also inheritance in order to separate…
Introduction The Adapter pattern is used to make one interface compatible with another. It allows objects with different, and therefore incompatible interface to work together. If you for example want to bring an existing class into your system with an…
Introduction The Adapter pattern is used to make one interface compatible with another. It allows objects with different, and therefore incompatible interface to work together. If you for example want to bring an existing class into your system with an…
Introduction The template method pattern is a behavourial design pattern which allows you to define the template, or the skeleton of an operation in a base class, while allowing the subclasses to override specific steps or all steps of the…
Introduction Sometimes, for reasons of efficiency, it can be quite handy to keep a pool, that is non-empty set, of initialized objects ready. This can be the case in for instance when you have database connections, which are expensive to…
Introduction In my previous post I described simple implementation of the Object Pool pattern. In this post I will extend this pattern using generics. It will become slightly more complicated, but also more flexible, and probably more solid. Implementation in…
Introduction Sometimes, for reasons of efficiency, it can be quite handy to keep a pool, that is non-empty set, of initialized objects ready. This can be the case in for instance when you have database connections, which are expensive to…
Sometimes creating an object is expensive, either an object takes up a lot of resources, or costs time to initialize because of external dependencies, like web services or databases. Then it might be a good idea to construct the object…
Introduction Dependency Injection is simply said, the idea that your classes should depend on abstraction, i.e. the abstraction of a datasource for example, rather than on concrete implementations. This means that classes will depend on interfaces rather than on real…
Introduction Dependency Injection is simply said, the idea that your classes should depend on abstraction, i.e. the abstraction of a datasource for example, rather than on concrete implementations. This means that classes will depend on interfaces rather than on real…
Introduction Dependency Injection is simply said, the idea that your classes should depend on abstraction, i.e. the abstraction of a datasource for example, rather than on concrete implementations. This means that classes will depend on interfaces rather than on real…
Introduction In order to deploy our app, we need to containerize it. I found that containerizing Python apps is not as straightforward as one might think. In this post I will discuss the Dockerfile I used to generate the image.…