Partial analysis of Executors.newCachedThreadPool

Nov 5, 202350

AI Translation

This post is translated from Chinese into English through AI.View Original

AI-generated summary

The newCachedThreadPool consists of 0 core threads, Integer.MAX_VALUE maximum threads, and a SynchronousQueue blocking queue. Each thread has a maximum lifespan of 60 seconds. The process involves checking if an object can be taken from the SynchronousQueue, if not, a regular thread is used to execute the corresponding command.

Basic Composition#

From the above image, it can be seen that newCachedThreadPool is composed of 0 core threads + Integer.MAX_VALUE maximum threads + SynchronousQueue blocking queue (where each thread has a maximum survival time of 60s).

Execution Process#

For the SynchronousQueue blocking queue, since this blocking queue can only offer an object when taking, the red box section will return false and cannot enter. At this point, it will enter the green box section for judgment (at this time, a regular thread will be started and the corresponding command will be executed using the regular thread).