Java Wait and Blocking and Callback

Java Wait and Blocking and Callback


Java Memory
> java -XX:+PrintFlagsFinal -version | grep MaxHeapSize

References:
https://github.com/awaitility/awaitility
https://blog.csdn.net/hj7jay/article/details/55094639
https://grokonez.com/java-integration/work-spring-callable-controller
https://www.bysocket.com/?p=1987
https://blog.csdn.net/Message_lx/article/details/81075766
https://plumbr.io/blog/java/how-to-use-asynchronous-servlets-to-improve-performance
https://stackoverflow.com/questions/46925508/default-number-of-threads-in-spring-boot-2-0-reactive-webflux-configuration
https://stackoverflow.com/questions/45019486/threading-model-of-spring-webflux-and-reactor
https://docs.spring.io/spring/docs/current/spring-framework-reference/web-reactive.html#webflux-concurrency-model