SOLID Design Principles
SOLID: single responsibility (SOR), open-close (OCR), Liskov substitution (LSP), interface segregation (ISP), dependency injection (DI)
(open-close + encapsulation of varies, etc) => next: Liskov Substitution DIP...
#design #oop #patternA Bottom-up Spark Learning Guide
First, need to learn to monitor the status of your spark jobs. There is an excellent guide of spark UI from Databricks
#sparkMockito and Powermockito Cheatsheet
Introduction
mockito: mock an object by interception and injection so that programmers don’t need to write their own mock class.
powermockito: can mock constructor, static...
#java #mockito #test
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