Creating Maintainable APIs by Ervin Varga

By Ervin Varga

Construct ordinary and maintainable APIs to create providers which are usable and maintainable. even supposing this booklet specializes in allotted prone, it additionally emphasizes how the middle ideas follow even to natural OOD and OOP constructs. the general context of constructing Maintainable APIs is to categorise the subjects into 4 major parts: periods and interfaces, HTTP relaxation APIs, messaging APIs, and message payloads (XML, JSON and JSON API in addition to Apache Avro).

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In the case of an API, stable means its readiness for backward-compatible evolution. For a module, greater stability implies bigger resistance to change. Modules with a high number of incoming dependencies (afferent coupling) are said to be stable. The number of outgoing dependencies (efferent coupling) defines the module’s weight. A higher weight ruins usability and testability, as you would need to handle many dependent parts to use and test the module. html. 7 22 CHAPTER 2 ■ MODULAR DESIGN • function-composition: Creates new functions from existing ones by composing them together.

The notion of primitive types just complicates the JVM. Nobody should design a new language with primitive types anymore. 6 Here, natural numbers are represented using lambda notation, and are named Church numerals (see the exercises at the end of this chapter for an example). Data, as we normally think about them, totally “disappear” in this method, though. You should keep in mind that in memory, executable code is stored as data. A selfmodifying code (a popular technique in malware) even treats code as ordinary data.

Applying information hiding immediately gives you full control over your jar files. 0 Provider API The bundle that encompasses the common API for integral providers. ${project. apache. html). The sections of pom. xml shown in bold are the interesting parts. The packaging should be bundle. This is one of the packaging options of the previously mentioned plug-in. The plug-in will create a standard jar file with an associated OSGi manifest file (when you invoke mvn package).

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