XMemcached&Spring集成

今天研究Memcached的Java的Client，使用XMemcached
1.3.5，做个简单的测试，并介绍如何与Spring集成。

相关链接：

Memcached笔记——（一）安装&常规错误&监控

Memcached笔记——（二）XMemcached&Spring集成

Memcached笔记——（三）Memcached使用总结

Memcached笔记——（四）应对高并发攻击

一、Memcached Client简要介绍

Memcached Client目前有3种：

Memcached Client for Java
SpyMemcached
XMemcached

这三种Client一直存在各种争议：

Memcached Client for Java 比 SpyMemcached更稳定、更早、更广泛；
SpyMemcached 比 Memcached Client for Java更高效；
XMemcached 比 SpyMemcache并发效果更好。

用数据来说话，参考官方性能对比：

Memcached Client for Java：https://github.com/gwhalin/Memcached-Java-Client/wiki/PERFORMANCE

XMemcached：http://xmemcached.googlecode.com/svn/trunk/benchmark/benchmark.html

二、XMemcached特性

XMemcached特性：

高性能
支持完整的memcached文本协议,二进制协议。
支持JMX，可以通过MBean调整性能参数、动态添加/移除server、查看统计等。
支持客户端统计
支持memcached节点的动态增减。
支持memcached分布:余数分布和一致性哈希分布。
更多的性能调整选项。

此外，XMemcached更容易与Spring集成。而且，属于中国原创！


三、XMemcached简单实现

MemcachedClientBuilder是MemcachedClient核心接口，用来控制Client的构建（build()方法）和关闭（shutdown()方法）。

XMemcachedClientBuilder一般通过构造方法配置地址列表，通常还要配置权重，代码如下：

Java代码


public XMemcachedClientBuilder(List<InetSocketAddress> addressList) {

if (addressList != null) {

for (InetSocketAddress addr : addressList) {

this.addressMap.put(addr, null);

}

}

}

public XMemcachedClientBuilder(List<InetSocketAddress> addressList,

int[] weights) {

if (addressList != null) {

for (InetSocketAddress addr : addressList) {

this.addressMap.put(addr, null);

}

}

this.weights = weights;

}

不过这哥们如果用this()可以省点代码，

还有给加点注释吧！


此外，还需要设置连接池大小，使用二进制协议/文本协议等。

通过build()方法获得MemcachedClient

然后就可以通过Memcached进行set、get、replace、delete等Memcached操作了！


上代码：

Java代码


import static junit.framework.Assert.*;

import java.io.IOException;

import java.util.concurrent.TimeoutException;

import net.rubyeye.xmemcached.MemcachedClient;

import net.rubyeye.xmemcached.MemcachedClientBuilder;

import net.rubyeye.xmemcached.XMemcachedClientBuilder;

import net.rubyeye.xmemcached.command.BinaryCommandFactory;

import net.rubyeye.xmemcached.exception.MemcachedException;

import net.rubyeye.xmemcached.utils.AddrUtil;

import org.junit.Test;

public class MemcachedClientTest {

@Test

public void test() {

MemcachedClientBuilder builder = new XMemcachedClientBuilder(

AddrUtil.getAddresses("10.11.155.26:11211 10.11.155.41:11211 10.10.76.31:11211 10.10.76.35:11211"),

new int[] { 1, 1, 1, 1 });

// 设置连接池大小，即客户端个数

builder.setConnectionPoolSize(50);

// 宕机报警

builder.setFailureMode(true);

// 使用二进制文件

builder.setCommandFactory(new BinaryCommandFactory());

MemcachedClient memcachedClient = null;

try {

memcachedClient = builder.build();

try {

// 设置/获取

memcachedClient.set("zlex", 36000, "set/get");

assertEquals("set/get", memcachedClient.get("zlex"));

// 替换

memcachedClient.replace("zlex", 36000, "replace");

assertEquals("replace", memcachedClient.get("zlex"));

// 移除

memcachedClient.delete("zlex");

assertNull(memcachedClient.get("zlex"));

} catch (TimeoutException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (MemcachedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} finally {

if (memcachedClient != null) {

try {

memcachedClient.shutdown();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

}

四、XMemcached与Spring集成

XMemcached与Spring集成可以参考http://code.google.com/p/xmemcached/wiki/Spring_Integration，这里只说最常用的方法。

memcached.properties做基本配置：

Properties代码


#连接池大小即客户端个数

memcached.connectionPoolSize=50

memcached.failureMode=true

#server1

memcached.server1.host=10.11.155.26

memcached.server1.port=11211

memcached.server1.weight=4

#server2

memcached.server2.host=10.11.155.41

memcached.server2.port=11211

memcached.server2.weight=3

#server3

memcached.server3.host=10.10.76.31

memcached.server3.port=11211

memcached.server3.weight=2

#server4

memcached.server4.host=10.10.76.35

memcached.server4.port=11211

memcached.server4.weight=1

XML配置文件：

Xml代码


<?xml version="1.0" encoding="UTF-8"?>

<beans

xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:p="http://www.springframework.org/schema/p"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<!-- http://code.google.com/p/xmemcached/wiki/Spring_Integration -->

<context:property-placeholder location="memcached.properties" />

<bean

id="memcachedClientBuilder"

class="net.rubyeye.xmemcached.XMemcachedClientBuilder"

p:connectionPoolSize="${memcached.connectionPoolSize}"

p:failureMode="${memcached.failureMode}">

<!-- XMemcachedClientBuilder have two arguments.First is server list,and

second is weights array. -->

<constructor-arg>

<list>

<bean class="java.net.InetSocketAddress">

<constructor-arg>

<value>${memcached.server1.host}</value>

</constructor-arg>

<constructor-arg>

<value>${memcached.server1.port}</value>

</constructor-arg>

</bean>

<bean class="java.net.InetSocketAddress">

<constructor-arg>

<value>${memcached.server2.host}</value>

</constructor-arg>

<constructor-arg>

<value>${memcached.server2.port}</value>

</constructor-arg>

</bean>

<bean class="java.net.InetSocketAddress">

<constructor-arg>

<value>${memcached.server3.host}</value>

</constructor-arg>

<constructor-arg>

<value>${memcached.server3.port}</value>

</constructor-arg>

</bean>

<bean class="java.net.InetSocketAddress">

<constructor-arg>

<value>${memcached.server4.host}</value>

</constructor-arg>

<constructor-arg>

<value>${memcached.server4.port}</value>

</constructor-arg>

</bean>

</list>

</constructor-arg>

<constructor-arg>

<list>

<value>${memcached.server1.weight}</value>

<value>${memcached.server2.weight}</value>

<value>${memcached.server3.weight}</value>

<value>${memcached.server4.weight}</value>

</list>

</constructor-arg>

<property name="commandFactory">

<bean class="net.rubyeye.xmemcached.command.TextCommandFactory" />

</property>

<property name="sessionLocator">

<bean class="net.rubyeye.xmemcached.impl.KetamaMemcachedSessionLocator" />

</property>

<property name="transcoder">

<bean class="net.rubyeye.xmemcached.transcoders.SerializingTranscoder" />

</property>

</bean>

<!-- Use factory bean to build memcached client -->

<bean

id="memcachedClient"

factory-bean="memcachedClientBuilder"

factory-method="build"

destroy-method="shutdown" />

</beans>

这里的memcachedClientBuilder节点完成MemcachedClientBuilder，然后通过memcachedClient节点配置factory-method，调用MemcachedClientBuilder的build()方法产生MemcachedClient，并配置destroy-method进行关闭。

不过我还是疑惑，这里的异常由谁来处理？Spring容器吗？

或者需要另一个代理Bean包装一下？

有了Spring容器支持，我们不需要在代码中进行配置，也不需要重复调用build()跟shutdown()方法，这些操作交给Spring来完成。

代码如下：

Java代码


import static junit.framework.Assert.*;

import java.util.concurrent.TimeoutException;

import net.rubyeye.xmemcached.MemcachedClient;

import net.rubyeye.xmemcached.exception.MemcachedException;

import org.junit.Before;

import org.junit.Test;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MemcachedSpringTest {

private ApplicationContext app;

private MemcachedClient memcachedClient;

@Before

public void init() {

app = new ClassPathXmlApplicationContext("applicationContext.xml");

memcachedClient = (MemcachedClient) app.getBean("memcachedClient");

}

@Test

public void test() {

try {

// 设置/获取

memcachedClient.set("zlex", 36000, "set/get");

assertEquals("set/get", memcachedClient.get("zlex"));

// 替换

memcachedClient.replace("zlex", 36000, "replace");

assertEquals("replace", memcachedClient.get("zlex"));

// 移除

memcachedClient.delete("zlex");

assertNull(memcachedClient.get("zlex"));

} catch (TimeoutException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (MemcachedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

相关链接：

Memcached笔记——（一）安装&常规错误&监控

Memcached笔记——（二）XMemcached&Spring集成

Memcached笔记——（三）Memcached使用总结

Memcached笔记——（四）应对高并发攻击

转载，非常好的文章希望对其他人也有帮助。

原文章 /article/4182811.html