Analysis of Executors.newCachedThreadPool

Nov 5, 202350

AI Translation

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AI-generated summary

The newCachedThreadPool is composed of 0 core threads, Integer.MAX_VALUE maximum threads, and a SynchronousQueue blocking queue. The threads have a maximum lifespan of 60 seconds. The SynchronousQueue only allows an object to be offered when another object is taken, so the red box will return false and the green box will be executed, creating a regular thread to run the corresponding command.

Basic Components#

The above figure shows 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 when taking an object, the red box part will return false and cannot enter. At this point, the green box part will be executed (a regular thread will be started and the corresponding command will be executed using the regular thread).