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Timer and ScheduledExecutorService are JDK built-in timed task solutions, and there is also a classic timed task design in the industry called Timing Wheel. Netty internally implements a HashedWheelTimer based on the time wheel to optimize millions of I/O timeouts. Detection, it is a high-performance, low-cost data structure, which is suitable for non-quasi-real-time, delayed short-term and fast tasks, such as heartbeat detection. This article mainly introduces the Timing Wheel and its use. Knowledge preparation requires an initial understanding of the Timing Wheel and what problems Netty’s HashedWheelTimer is trying to solve […]
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