4 posts
The final part of the JVM concurrency series. A four-question framework for choosing between Virtual Thread, Reactor, and Coroutines, plus the unique strengths of each technology and the most common misconceptions.
How virtual thread mount/unmount works under the hood, how it differs from coroutine continuations, why AOP proxies just work, and the synchronized pinning trap with practical fixes.
Writing Reactor-style deep flatMap chains as sequential, synchronous-looking code with Kotlin Coroutines. Covers suspend, CPS transformation, state machines, Flow, Channel, and structured concurrency.
The difference between processes and threads, concurrency vs parallelism, and why synchronous/asynchronous and blocking/non-blocking are two independent axes — foundational concepts for the JVM concurrency series.