簡單來說 Executor 和 Worker 構(gòu)成了生產(chǎn)者消費者的模型，臨界資源使用BlockQueue存儲

任務(wù)的流轉(zhuǎn)

而Worker作為消費者可以簡化為以下偽代碼

private BlockQueue<Runnable> workQueue = new BlockQueue<>();
public class Worker implements Runnable {
  public void run() {
    runWorker();
  }
  public void runWorker(){
    Runnable task;
    while ((task = workQueue.take()) != null) {
      task.run();
    }
  }
}

而Executor作為生產(chǎn)者可以簡化為以下偽代碼

public class Executor {
  public void execute(Runnable command) {
    if(isRunning()) {
       // 根據(jù)現(xiàn)有線程個數(shù)判斷是推送臨界區(qū)workQueue.offer(command)
       // 還是 addWorker (Runnable)
    } else {
      reject(command);
    }
  }
}