package me.xiaopan.sketch.cache.recycle;
import java.util.ArrayDeque;
import java.util.Queue;
abstract class BaseKeyPool<T extends Poolable> {
private static final int MAX_SIZE = 20;
private final Queue<T> keyPool = new ArrayDeque<T>(MAX_SIZE);
protected T get() {
T result = keyPool.poll();
if (result == null) {
result = create();
}
return result;
}
public void offer(T key) {
if (keyPool.size() < MAX_SIZE) {
keyPool.offer(key);
}
}
protected abstract T create();
}