Below some of the design pattern we use most often, their purpose and examples. Factory Method Factory method – it’s a creational design pattern that allows subclasses to decide which classes to instantiate, removing this concern from the caller level.The factory method is typically abstract, and subclasses implement their own suitable version, as long as …
If you are testing code that interacts wit the file system and want to avoid test collisions – JUnit rules allow very flexible behavior of each test method in JUnit test case. For example, if you need to use a temporary directory for your tests – it will be deleted after the test completes or …
Normalization is a process of modelling data and organizing it into tables. The goal of normalization is a high quality data model.The motivation for Normalization is to avoid unwanted redundancies in the table design, and eliminate modification anomalies.There are use cases when you strongly need normalization (transaction processing db) and when you avoid it (business …
Success of a project and its data model is determined by multiple factors, and one of the critical components of a project is collection of requirements and data flow modeling. Data flow modeling starts with collecting requirements for the New system and documenting the Current system’s data flows. Current physical model is documented first and …
Data flows, Data modeling, Functional and non functional requirements Read More »