simple-spring-memcached 注解配置

一、序言

       有了缓存,还是喜欢用注解去使用,本想和spring 写一个类似ehcache 的东西,后来发google 已经提供了spring 和memcache 的 注解配置,那就先拿来用用了~。~。

 

二、基本配置:

       2.1 先把spring 和 memcached 结合起来,创建一个spring-xmemcached.xml 的文件

       

<!-- 用这个代替xmemcacheClient去构建client  -->
    <bean id="xmemcacheBuilder" class="net.rubyeye.xmemcached.XMemcachedClientBuilder">
        <!-- 暂时我们就用两个端口 -->
        <constructor-arg>
            <list>
                <bean class="java.net.InetSocketAddress">
                    <constructor-arg>
                        <value>localhost</value>
                    </constructor-arg>
                    <constructor-arg>
                        <value>11211</value>
                    </constructor-arg>
                </bean>
                <bean class="java.net.InetSocketAddress">
                    <constructor-arg>
                        <value>localhost</value>
                    </constructor-arg>
                    <constructor-arg>
                        <value>11212</value>
                    </constructor-arg>
                </bean>
            </list>
        </constructor-arg>
        <!-- 权重配置 -->
        <constructor-arg>
            <list>
                <value>1</value>
                <value>2</value>
            </list>
        </constructor-arg>
        <!--</property>-->
        <!-- nio 连接池 配置,默认是 1 -->
        <property name="connectionPoolSize" value="2"/>
        <!-- 二进制协议 ,默认是 TextCommandFactory-->
        <property name="commandFactory">
            <bean class="net.rubyeye.xmemcached.command.BinaryCommandFactory"/>
        </property>
        <!--分布式策略 一致性hash,默认是  ArrayMemcachedSessionLocator -->
        <property name="sessionLocator">
            <bean class="net.rubyeye.xmemcached.impl.KetamaMemcachedSessionLocator"/>
        </property>
        <!--序列化转换器,默认就是这个 -->
        <!--<property name="transcoder" value="net.rubyeye.xmemcached.transcoders.SerializingTranscoder"/>-->
        <!--字节缓冲器,不知道为啥这玩意儿过时了,源码默认采用的这个!! -->
        <!--<property name="bufferAllocator" value="net.rubyeye.xmemcached.buffer.SimpleBufferAllocator"/>-->
    </bean>
    <!-- 配置一个客户端 -->
    <bean name="xmemcachedClient" factory-bean="xmemcacheBuilder" factory-method="build" destroy-method="shutdown"/>

 

    测试一下:可以操作就表示 基本配置成功了

    

  ApplicationContext context = new ClassPathXmlApplicationContext("spring/spring-xmemcached.xml");
        MemcachedClient client = (MemcachedClient) context.getBean("xmemcachedClient");
        System.out.println(client);
        client.add("name",100,"张三");
        System.out.println(client.get("name"));
        client.delete("name");
        System.out.println(client.get("name"));

    还是可以参考 https://code.google.com/p/xmemcached/wiki/User_Guide_zh

 

 

 三、spring+memcached 注解的试用

       3.1 引入依赖:

             

  <dependency>
            <groupId> com.google.code.simple-spring-memcached </groupId>
            <artifactId> xmemcached-provider </artifactId>
            <version>3.5.0</version>
        </dependency>

 

       3.2 基本配置:

      

 <!-- 轻轻的扫描一下 -->
    <context:component-scan base-package="com.raycloud.plugin.memcache"/>
    <!-- AOP 你懂的 -->
    <aop:aspectj-autoproxy />
     <!-- simple-spring-memcached 目录下的 -->
    <import resource="classpath:simplesm-context.xml" />
    <!-- 默认一个client -->
    <bean name="defaultMemcachedClient" class="com.google.code.ssm.CacheFactory">
        <property name="cacheClientFactory">
            <bean name="cacheClientFactory" class="com.google.code.ssm.providers.xmemcached.MemcacheClientFactoryImpl" />
        </property>
        <property name="addressProvider">
            <bean class="com.google.code.ssm.config.DefaultAddressProvider">
                <property name="address" value="127.0.0.1:11211,127.0.0.1:11212" />
            </bean>
        </property>
        <!-- 一致性hash ~。~ -->
        <property name="configuration">
            <bean class="com.google.code.ssm.providers.CacheConfiguration">
                <property name="consistentHashing" value="true" />
            </bean>
        </property>
    </bean>
    <!-- 这玩意儿在3.2 后,文档可以指定顺序 以及 拦截器 前后执行 - -!暂时没用过,加上不报错 -->
    <bean class="com.google.code.ssm.Settings">
        <property name="order" value="500" />
    </bean>

 

      3.3 测试一下:我们建立TestDao 和 Test 类,记得在扫描的package 下哦!

      

import com.google.code.ssm.api.ParameterValueKeyProvider;
import com.google.code.ssm.api.ReadThroughSingleCache;
import org.springframework.stereotype.Component;

/**
 * Created by qiqiang on 2014/12/22.
 */
@Component
public class TestDao {
    @ReadThroughSingleCache(namespace = "test", expiration = 30000)
    public long getUserById(@ParameterValueKeyProvider long id) throws Exception{
        System.out.println("没有缓存命中");
        return id;
    }
}

 

   

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations="classpath:spring/spring-xmemcached.xml")
public class Test {
    @Autowired
    private TestDao testDao;
    @org.junit.Test
    public void x(){
        try {
            System.out.println( testDao.getUserById(2l)+"------------------------");
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

   

    忘记了,还得加测试的依赖:

   

  <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>3.2.4.RELEASE</version>
            <scope>test</scope>
        </dependency>
<dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>

   

    3.4 OK 就测试完成了,当然你也可以用spring 定义的缓存接口,和 ehcache 类似的啦,看配置:

         为了配套依赖:

       

   <dependency>
            <groupId> com.google.code.simple-spring-memcached </groupId>
            <artifactId>spring-cache</artifactId>
            <version>3.5.0</version>
        </dependency>

 

 

    

 <cache:annotation-driven />
    <!-- 这里的cacheManager 缓存名字是默认的,要改,就参考我spring+ehcache 的配置改 -->
    <bean name="cacheManager" class="com.google.code.ssm.spring.SSMCacheManager">
        <property name="caches">
            <set>
                <bean class="com.google.code.ssm.spring.SSMCache">
                    <constructor-arg name="cache" index="0" ref="defaultCache" />
                    <!-- 默认 5 minutes -->
                    <constructor-arg name="expiration" index="1" value="300" />
                    <!-- @CacheEvict(..., "allEntries" = true) won't work because allowClear is false,
                     so we won't flush accidentally all entries from memcached instance -->
                    <!-- 这里表示我们不会全部清除所有缓存,使用ehcache 的时候我们就会发现, @CacheEvict(..., "allEntries" = true)
                    它是按 配置的缓存名 就行清除的,而memcached 我们是通过namespace 进行清除的,还有指定时间,这是我最喜欢的了~。~
                     -->
                    <constructor-arg name="allowClear" index="2" value="false" />
                </bean>
            </set>
        </property>
    </bean>
    
    <bean name="defaultCache" class="com.google.code.ssm.CacheFactory">
        <property name="cacheName" value="defaultCache"/>
        <property name="cacheClientFactory">
            <bean name="cacheClientFactory" class="com.google.code.ssm.providers.xmemcached.MemcacheClientFactoryImpl"/>
        </property>
        <property name="addressProvider">
            <bean class="com.google.code.ssm.config.DefaultAddressProvider">
                <property name="address" value="127.0.0.1:11211,127.0.0.1:11212"/>
            </bean>
        </property>
        <property name="configuration">
            <bean class="com.google.code.ssm.providers.CacheConfiguration">
                <property name="consistentHashing" value="true"/>
            </bean>
        </property>
    </bean>

 
   3.5 现在来看看 这种方式得测试,应该比较熟悉~。~!

     TestDao2 和上面液氧,就改了下名字

@Component
public class TestDao2 {
    @CachePut(value = "defaultCache",key="#id")
    public long getUserById(long id) throws Exception{
        System.out.println("没有缓存命中");
        return id;
    }

    @Cacheable(value = "defaultCache")
    public String getList(String author) throws Exception {
        System.out.println("没有缓存命中");
        return author;
    }
}

    Test,和上面一样

    

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations="classpath:spring/spring-xmemcached.xml")
public class Test {
    @Autowired
    private TestDao2 testDao2;
    @org.junit.Test
    public void x(){
        try {
            System.out.println( testDao2.getUserById(2l)+"------------------------");
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

 

    同样可以实现缓存

 

小结:

     1.这里介绍了spring +xmemcached 配置,以及注解的配置,关于注解的一些详细资料下次介绍

     2.由于有namespace 和 时间的控制,使用起来非常方便,集群部署,容错 都比较舒服的~。~,有错误请指出!

     3.上面的来源 大部分还是文档介绍,当翻译下而已,更多的大家可以参考下面资料!

 

源码

https://github.com/ragnor/simple-spring-memcached

文档

https://code.google.com/p/simple-spring-memcached/wiki/Getting_Started

https://code.google.com/p/simple-spring-memcached/wiki/UserGuide

https://code.google.com/p/xmemcached/wiki/User_Guide_zh

别人的例子

http://weblog4j.com/2013/05/31/simple-spring-memcached-spring-caching-abstraction-and-memcached/

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