MyBatis與Memcached集成

1、 Memcache和Mybatis整合jar 下載： mybatis-memcached-1.0.0.jar

      官方網站：http://www.mybatis.org/memcached-cache/index.html

      maven項目添加： 

<!-- mybatis整合memcache -->
        <dependency>
            <groupId>org.mybatis.caches</groupId>
                <artifactId>mybatis-memcached</artifactId>
            <version>1.0.0</version>
        </dependency>

2、Mapper文件添加如下語句：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper        PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"  
"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">
<mapper namespace="com.xxx.dao.xxx" >
<cache type="org.mybatis.caches.memcached.LoggingMemcachedCache" />
  <resultMap id="xxx" type="com.xxx.xxx.xxx" >
    <id column="ID" property="id" jdbcType="BIGINT" />
  </resultMap>

配置方式分為有日志和無日志兩種（自己測試兩種方式打印的日志沒區別，日志級別DEBUG）：

無日志
<cache type="org.mybatis.caches.memcached.MemcachedCache" />

有日志
<cache type="org.mybatis.caches.memcached.LoggingMemcachedCache" />

3、classpath下新建memcached.properties文件，格式如下：

#any string identifier
org.mybatis.caches.memcached.keyprefix=_biz-cache-wk_
#space separated list of ${host}:${port}
org.mybatis.caches.memcached.servers=192.168.0.200:12000
#org.mybatis.caches.memcached.servers=192.168.0.44:12000
#Any class that implementsnet.spy.memcached.ConnectionFactory
org.mybatis.caches.memcached.connectionfactory=net.spy.memcached.DefaultConnectionFactory
#the number of seconds in 30 days    the expiration time (in seconds)
org.mybatis.caches.memcached.expiration=6000
#flag to enable/disable the async get
org.mybatis.caches.memcached.asyncget=false
#the timeout when using async get
org.mybatis.caches.memcached.timeout=5
#the timeout unit when using async get
org.mybatis.caches.memcached.timeoutunit=java.util.concurrent.TimeUnit.SECONDS
#if true, objects will be GZIP compressed before putting them to
org.mybatis.caches.memcached.compression=false

#\u7f13\u5b58\u670d\u52a1\u5668\u5b95\u673a\u540e\u591a\u4e45\u4e0d\u4f7f\u7528memcached \u6beb\u79d2\u4e3a\u5355\u4f4d
#refuse time when connection refused
org.mybatis.caches.memcached.refuseperiod=1000

配置參數說明：

Property	Default	Description
org.mybatis.caches.memcached.keyprefix	_mybatis_	緩存key的前綴
org.mybatis.caches.memcached.servers	localhost:11211	memcache地址
org.mybatis.caches.memcached.connectionfactory	net.spy.memcached.DefaultConnectionFactory	只要實現接口net.spy.memcached.ConnectionFactory
org.mybatis.caches.memcached.expiration	2592000（30天的秒數）	過期時間單位秒
org.mybatis.caches.memcached.asyncget	false	是否啟用異步讀
org.mybatis.caches.memcached.timeout	5	使用異步讀的timeout時間
org.mybatis.caches.memcached.timeoutunit	java.util.concurrent.TimeUnit.SECONDS	使用異步讀的timeout時間單位
org.mybatis.caches.memcached.compression	false	如果開啟，對象在放到memcache前會使用GZIP 壓縮

 

源碼存在並發量大緩存數據與數據庫不一致問題，詳情點擊：MyBatis與Memcache集成后緩存數據不一致問題