使用apache common pool2 封装redis连接池

 

 

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package redis;
 
 
 
 
 
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;
import org.apache.commons.pool2.impl.GenericObjectPoolConfig;
import redis.clients.jedis.Jedis;
 
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
 
 
/**
 *
 * EWrapper连接池工厂
 * @author shane
 *
 */
public class JedisPoolFactory extends BasePooledObjectFactory<Jedis>{
 
    private String ip;
    private int port;
    private String pass;
 
    public JedisPoolFactory() {
        ip = "10.161.228.88";
        port = 6379;
        pass = "test";
    }
 
    public static void main(String[] args) throws InterruptedException {
        GenericObjectPoolConfig config = new GenericObjectPoolConfig();
        config.setMaxWaitMillis(2000);
        config.setMinIdle(1);
        config.setMaxIdle(3);
        config.setMaxTotal(5);
 
        /**
         * 销毁到minidle
         */
        config.setSoftMinEvictableIdleTimeMillis(3000);
 
        /**
         * 销毁所有
         */
     //   config.setMinEvictableIdleTimeMillis(3000);
 
        // 词句是必须的,否则(Soft)MinEvictableIdleTimeMillis不生效
        config.setTimeBetweenEvictionRunsMillis(100);
 
        GenericObjectPool<Jedis> objectPool = new GenericObjectPool<Jedis>(new JedisPoolFactory(), config);
 
        List<Jedis> list = new ArrayList<>();
 
        /**
         * 等待第一个连接初始化,因为minidle=1
         */
        Thread.sleep(5000);
 
        /**
         * 申请六个资源,且不归还,等待报错
         */
        try {
            for(int i=0; i<6; ++i) {
                Jedis jedis = objectPool.borrowObject();
            //    objectPool.returnObject(jedis);
                list.add(jedis);
            }
 
        } catch (Exception e) {
            System.out.println(e.getMessage() + new Date());
        }
 
        /**
         * 清理,查看clear-destroy情况
         */
        // 不归还的话,clear无效
        for(Jedis jedis : list) {
            objectPool.returnObject(jedis);
        }
        objectPool.clear();
        list.clear();
 
        /**
         * 休息5s
         */
        Thread.sleep(5000);
 
        /**
         * 申请5个连接,然后一起归还,5大于maxidle=3的2个对象应该被立即销毁,然后等3s后,到minidle=1的2个对象被销毁
         */
        try {
            for(int i=0; i<5; ++i) {
                Jedis jedis = objectPool.borrowObject();
                list.add(jedis);
                //    objectPool.returnObject(jedis);
            }
 
            for(Jedis jedis : list) {
                objectPool.returnObject(jedis);
            }
 
            // 等待对象销毁
            Thread.sleep(10000);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    public JedisPoolFactory(String ip, int port, String pass) {
        this.ip = ip;
        this.port = port;
        this.pass = pass;
    }
 
    @Override
    public Jedis create() throws Exception {
        Jedis jedis = new Jedis(ip, port, 10000);
        jedis.auth("test");
 
        return jedis;
    }
 
    @Override
    public PooledObject<Jedis> wrap(Jedis jedis) {
        System.out.println("创建" + new Date());
        return new DefaultPooledObject<Jedis>(jedis);
    }
//
//    @Override
//  public PooledObject<AbstractWrapper> wrap(AbstractWrapper wrapper) {
//      return new DefaultPooledObject<AbstractWrapper>(wrapper);
//  }
//
    /**
     * 对象激活(borrowObject时触发)
     *
     * @param pooledObject
     */
    @Override
    public void activateObject(PooledObject<Jedis> pooledObject) throws Exception {
        System.out.println("申请" + new Date());
        super.activateObject(pooledObject);
    }
 
 
    /**
     * 对象销毁
     * @param pooledObject
     */
    @Override
    public void destroyObject(PooledObject<Jedis> pooledObject) throws Exception {
        System.out.println("销毁" + new Date());
        Jedis jedis = pooledObject.getObject();
        jedis.close();
        super.destroyObject(pooledObject);
    }
 
 
//    /**
//     * 验证对象有效性
//     * @param
//     * @return
//     */
//    @Override
//    public boolean validateObject(PooledObject<Jedis> pooledObject) {
//        System.out.println("validate");
//        return true;
//    }
//
//    public void passivateObject(PooledObject<Jedis> p) throws Exception {
//        System.out.println("passivate");
//        super.passivateObject(p);
//    }
 
}

 

 

1)

config.setSoftMinEvictableIdleTimeMillis(3000);

 

2)

config.setMinEvictableIdleTimeMillis(3000);

 

 

timeBetweenEvictionRunsMillis和minEvictableIdleTimeMillis一起使用,每 timeBetweenEvictionRunsMillis毫秒秒检查一次连接池中空闲的连接,把空闲时间超过SoftMinEvictableIdleTimeMillis毫秒的连接断开,  直到连接池中的连接数到minIdle为止;对于minEvictableIdleTimeMillis,则全部销毁。

 

https://www.jianshu.com/p/b0189e01de35

https://www.cnblogs.com/softidea/p/5759457.html

 

 

// 创建一个新对象;当对象池中的对象个数不足时,将会使用此方法来"输出"一个新的"对象",并交付给对象池管理
PooledObject<T> makeObject() throws Exception;

// 销毁对象,如果对象池中检测到某个"对象"idle的时间超时,或者操作者向对象池"归还对象"时检测到"对象"已经无效,那么此时将会导致"对象销毁";
// "销毁对象"的操作设计相差甚远,但是必须明确:当调用此方法时,"对象"的生命周期必须结束.如果object是线程,那么此时线程必须退出;
// 如果object是socket操作,那么此时socket必须关闭;如果object是文件流操作,那么此时"数据flush"且正常关闭.
void destroyObject(PooledObject<T> p) throws Exception;

// 检测对象是否"有效";Pool中不能保存无效的"对象",因此"后台检测线程"会周期性的检测Pool中"对象"的有效性,如果对象无效则会导致此对象从Pool中移除,并destroy;
// 此外在调用者从Pool获取一个"对象"时,也会检测"对象"的有效性,确保不能讲"无效"的对象输出给调用者;testOnBorrow
// 当调用者使用完毕将"对象归还"到Pool时,仍然会检测对象的有效性.所谓有效性,就是此"对象"的状态是否符合预期,是否可以对调用者直接使用;testOnReturn
// 如果对象是Socket,那么它的有效性就是socket的通道是否畅通/阻塞是否超时等.
boolean validateObject(PooledObject<T> p);

// "激活"对象,当Pool中决定移除一个对象交付给调用者时额外的"激活"操作,比如可以在activateObject方法中"重置"参数列表让调用者使用时感觉像一个"新创建"的对象一样;如果object是一个线程,可以在"激活"操作中重置"线程中断标记",或者让线程从阻塞中唤醒等;
// 如果object是一个socket,那么可以在"激活操作"中刷新通道,或者对socket进行链接重建(假如socket意外关闭)等.
void activateObject(PooledObject<T> p) throws Exception;

// "钝化"对象,当调用者"归还对象"时,Pool将会"钝化对象";钝化的言外之意,就是此"对象"暂且需要"休息"一下.
// 如果object是一个socket,那么可以passivateObject中清除buffer,将socket阻塞;如果object是一个线程,可以在"钝化"操作中将线程sleep或者将线程中的某个对象wait.需要注意的时,activateObject和passivateObject两个方法需要对应,避免死锁或者"对象"状态的混乱.
void passivateObject(PooledObject<T> p) throws Exception;

 

 

创建Tue Aug 13 13:52:12 CST 2019
申请Tue Aug 13 13:52:17 CST 2019
validate
创建Tue Aug 13 13:52:17 CST 2019
申请Tue Aug 13 13:52:17 CST 2019
validate
创建Tue Aug 13 13:52:17 CST 2019
创建Tue Aug 13 13:52:17 CST 2019
申请Tue Aug 13 13:52:17 CST 2019
validate
申请Tue Aug 13 13:52:17 CST 2019
validate
创建Tue Aug 13 13:52:17 CST 2019
申请Tue Aug 13 13:52:17 CST 2019
validate
Timeout waiting for idle objectTue Aug 13 13:52:19 CST 2019
validate
passivate
validate
passivate
validate
passivate
validate
passivate
销毁Tue Aug 13 13:52:19 CST 2019
validate
passivate
销毁Tue Aug 13 13:52:19 CST 2019
销毁Tue Aug 13 13:52:19 CST 2019
销毁Tue Aug 13 13:52:19 CST 2019
销毁Tue Aug 13 13:52:19 CST 2019
创建Tue Aug 13 13:52:19 CST 2019
申请Tue Aug 13 13:52:24 CST 2019
validate
创建Tue Aug 13 13:52:24 CST 2019
申请Tue Aug 13 13:52:24 CST 2019
validate
创建Tue Aug 13 13:52:24 CST 2019
创建Tue Aug 13 13:52:24 CST 2019
申请Tue Aug 13 13:52:24 CST 2019
validate
申请Tue Aug 13 13:52:24 CST 2019
validate
创建Tue Aug 13 13:52:25 CST 2019
申请Tue Aug 13 13:52:25 CST 2019
validate
validate
passivate
validate
passivate
validate
passivate
validate
passivate
销毁Tue Aug 13 13:52:25 CST 2019
validate
passivate
销毁Tue Aug 13 13:52:25 CST 2019
销毁Tue Aug 13 13:52:28 CST 2019
销毁Tue Aug 13 13:52:28 CST 2019

posted on   silyvin  阅读(1902)  评论(0编辑  收藏  举报

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