Apache Common Pool Introduction

先说下主要的类和接口

ObjectPool 接口是“池”定义，GenericObjectPool 是它的实现。

PooledObject 接口是“池对象”定义，DefaultPooledObject 是它的实现。

PooledObjectFactory 接口是“产生池对象的工厂”定义，BasePooledObjectFactory是它的实现。

下面我们先用以上几个类和接口搭建一个租车实例。

package com.pulsar.pool;

import org.apache.commons.pool2.BasePooledObjectFactory;
import org.apache.commons.pool2.PooledObject;
import org.apache.commons.pool2.impl.DefaultPooledObject;
import org.apache.commons.pool2.impl.GenericObjectPool;

public class CPool {
    
    public static void main(String[] args){
        CarFactory poolFactory = new CarFactory();
        GenericObjectPool<Car> pool = new GenericObjectPool<>(poolFactory);
        try {
            Car car = pool.borrowObject();
            System.out.println(car);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    static public class Car {
        public String toString(){
            return "BMW";
        }
    }

    static public class CarFactory extends BasePooledObjectFactory {
        @Override
        public Object create() throws Exception {
            return new DefaultPooledObject(new Car());
        }

        @Override
        public PooledObject wrap(Object o) {
            return (PooledObject)o;
        }
    }

}

 

来源：oschina

链接：https://my.oschina.net/bxnet/blog/4260860