Concurrency models
One of the most exciting aspects of the Java programming language is its robustness. When addressing parallel execution challenges, Java supports multiple models, so the approach we take is up to us. Usually, there is not just one way of doing things, with each possible solution presenting both advantages and trade-offs. Our goal is to create Java applications that run efficiently and are scalable and maintainable. To that end, we will use the thread-based concurrency approach (detailed later in this chapter). Our selection is based on its straightforward nature.
Concurrency, in the context of computer science, is the simultaneous execution of instructions. This is achieved through multithreading (think of multitasking). This programming paradigm includes the ability to access Java objects and other resources from multiple threads. Let’s look at three specific models (thread-based, message passing, and reactive) and then compare them to see which model...
