JAVA thread Pool

• Threadpoolexecutor inherits the abstract class Abstractexecutorservice, which implements two Interface:executorservice (children) and executor (parent);
• When building Threadpoolexecutor, the following parameters are required:
  • Corepoolsize: Thread pool maintains a minimum number of threads
  • Maximumpoolsize: Thread pool maintains the maximum number of threads
  • KeepAliveTime: The thread pool maintains the idle time allowed by threads
  • Unit: The thread pool maintains the units of idle time allowed by threads
  • WorkQueue: Buffer queue used by the thread pool
  • Handler: thread pool processing policy for rejected tasks
• To create a threading method:
  • If less than Corepoolsize,executor adds a new thread without queuing;
  • If it is greater than corepoolsize, it is necessary to process the request through a queue such as (Synchronousqueue,linkedblockingqueue,arrayblockingqueue) instead of adding a new thread;

  • If it is not possible to queue, create a new thread until maximumpoolsize, and finally use the Deny policy processing;
• 4 Processing Strategies:

JAVA thread Pool