使用memcached

1.加載commons-pool-1.5.6.jar、java_memcached-release_2.6.6.jar、slf4j-api-1.6.1.jar、slf4j-simple-1.6.1.jar

2.創建memcached工具類：

public class MemcachedUtil {
/**
* memcached客戶端單例
*/
private static MemCachedClient cachedClient = new MemCachedClient();
/**
* 初始化連接池
*/
static {
//獲取連接池的實例
SockIOPool pool = SockIOPool.getInstance();
//服務器列表及其權重
String[] servers = {"127.0.0.1:11211"};
Integer[] weights = {3};
//設置服務器信息
pool.setServers(servers);
pool.setWeights(weights);
//設置初始連接數、最小連接數、最大連接數、最大處理時間
pool.setInitConn(10);
pool.setMinConn(10);
pool.setMaxConn(1000);
pool.setMaxIdle(1000*60*60);
//設置連接池守護線程的睡眠時間
pool.setMaintSleep(60);
//設置TCP參數，連接超時
pool.setNagle(false);
pool.setSocketTO(60);
pool.setSocketConnectTO(0);
//初始化並啓動連接池
pool.initialize();
//壓縮設置，超過指定大小的都壓縮
// cachedClient.setCompressEnable(true);
// cachedClient.setCompressThreshold(1024*1024);
}
private MemcachedUtil(){
}
public static boolean add(String key, Object value) {
return cachedClient.add(key, value);
}
public static boolean add(String key, Object value, Integer expire) {
return cachedClient.add(key, value, expire);
}
public static boolean put(String key, Object value) {
return cachedClient.set(key, value);
}
public static boolean put(String key, Object value, Integer expire) {
return cachedClient.set(key, value, expire);
}
public static boolean replace(String key, Object value) {
return cachedClient.replace(key, value);
}
public static boolean replace(String key, Object value, Integer expire) {
return cachedClient.replace(key, value, expire);
}
public static Object get(String key) {
return cachedClient.get(key);
}
}

public class MemcachedUtil {

	/**
	 * memcached客戶端單例
	 */
	private static MemCachedClient cachedClient = new MemCachedClient();
	
	/**
	 * 初始化連接池
	 */
	static {
		//獲取連接池的實例
		SockIOPool pool = SockIOPool.getInstance();
		
		//服務器列表及其權重
		String[] servers = {"127.0.0.1:11211"};
		Integer[] weights = {3};
		
		//設置服務器信息
		pool.setServers(servers);
		pool.setWeights(weights);
		
		//設置初始連接數、最小連接數、最大連接數、最大處理時間
		pool.setInitConn(10);
		pool.setMinConn(10);
		pool.setMaxConn(1000);
		pool.setMaxIdle(1000*60*60);
		
		//設置連接池守護線程的睡眠時間
		pool.setMaintSleep(60);
		
		//設置TCP參數，連接超時
		pool.setNagle(false);
		pool.setSocketTO(60);
		pool.setSocketConnectTO(0);
		
		//初始化並啓動連接池
		pool.initialize();
		
		//壓縮設置，超過指定大小的都壓縮
//		cachedClient.setCompressEnable(true);
//		cachedClient.setCompressThreshold(1024*1024);
	}
	
	private MemcachedUtil(){
	}
	
	public static boolean add(String key, Object value) {
		return cachedClient.add(key, value);
	}
	
	public static boolean add(String key, Object value, Integer expire) {
		return cachedClient.add(key, value, expire);
	}
	
	public static boolean put(String key, Object value) {
		return cachedClient.set(key, value);
	}
	
	public static boolean put(String key, Object value, Integer expire) {
		return cachedClient.set(key, value, expire);
	}
	
	public static boolean replace(String key, Object value) {
		return cachedClient.replace(key, value);
	}
	
	public static boolean replace(String key, Object value, Integer expire) {
		return cachedClient.replace(key, value, expire);
	}
	
	public static Object get(String key) {
		return cachedClient.get(key);
	}
	
}

3. 創建需要緩存的對象：

[java] view plain copy print ?

public class UserBean implements Serializable {
private static final long serialVersionUID = 9174194101246733501L;
private String username;
private String password;
public UserBean(String username, String password) {
this.username = username;
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((password == null) ? 0 : password.hashCode());
result = prime * result
+ ((username == null) ? 0 : username.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
UserBean other = (UserBean) obj;
if (password == null) {
if (other.password != null)
return false;
} else if (!password.equals(other.password))
return false;
if (username == null) {
if (other.username != null)
return false;
} else if (!username.equals(other.username))
return false;
return true;
}
@Override
public String toString() {
return "username:" + username + ",password:" + password;
}
}

public class UserBean implements Serializable {

	private static final long serialVersionUID = 9174194101246733501L;

	private String username;
	
	private String password;
	
	public UserBean(String username, String password) {
		this.username = username;
		this.password = password;
	}
	
	public String getUsername() {
		return username;
	}
	
	public void setUsername(String username) {
		this.username = username;
	}
	
	public String getPassword() {
		return password;
	}
	
	public void setPassword(String password) {
		this.password = password;
	}
	
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result
				+ ((password == null) ? 0 : password.hashCode());
		result = prime * result
				+ ((username == null) ? 0 : username.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		UserBean other = (UserBean) obj;
		if (password == null) {
			if (other.password != null)
				return false;
		} else if (!password.equals(other.password))
			return false;
		if (username == null) {
			if (other.username != null)
				return false;
		} else if (!username.equals(other.username))
			return false;
		return true;
	}

	@Override
	public String toString() {
		return "username:" + username + ",password:" + password;
	}
}

4.創建測試用例：

[java] view plain copy print ?

public class MemcachedUtilTest {
@Test
public void testMemcached() {
MemcachedUtil.put("hello", "world", 60);
String hello = (String) MemcachedUtil.get("hello");
Assert.assertEquals("world", hello);
for(int i = 0; i < 10000000; ++i) {
UserBean userBean = new UserBean("Jason" + i, "123456-" + i);
MemcachedUtil.put("user" + i, userBean, 60);
Object obj = MemcachedUtil.get("user" + i);
Assert.assertEquals(userBean, obj);
}
}
}

public class MemcachedUtilTest {

	@Test
	public void testMemcached() {
		MemcachedUtil.put("hello", "world", 60);
		String hello = (String) MemcachedUtil.get("hello");
		Assert.assertEquals("world", hello);
		
		for(int i = 0; i < 10000000; ++i) {
			UserBean userBean = new UserBean("Jason" + i, "123456-" + i);
			MemcachedUtil.put("user" + i, userBean, 60);
			Object obj = MemcachedUtil.get("user" + i);
			Assert.assertEquals(userBean, obj);
		}
	}
}

5.通過spring注入memcached：

[html] view plain copy print ?

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="memcachedPool" class="com.danga.MemCached.SockIOPool"
factory-method="getInstance" init-method="initialize">
<constructor-arg>
<value>neeaMemcachedPool</value>
</constructor-arg>
<property name="servers">
<list>
<value>127.0.0.1:11211</value>
</list>
</property>
<property name="initConn">
<value>20</value>
</property>
<property name="minConn">
<value>10</value>
</property>
<property name="maxConn">
<value>50</value>
</property>
<property name="nagle">
<value>false</value>
</property>
<property name="socketTO">
<value>3000</value>
</property>
</bean>
<bean id="memcachedClient" class="com.danga.MemCached.MemCachedClient">
<constructor-arg>
<value>neeaMemcachedPool</value>
</constructor-arg>
</bean>
</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans.xsd">

	<bean id="memcachedPool" class="com.danga.MemCached.SockIOPool" 
		factory-method="getInstance" init-method="initialize">
		<constructor-arg>
			<value>neeaMemcachedPool</value>
		</constructor-arg>
		<property name="servers">
			<list>
				<value>127.0.0.1:11211</value>
			</list>
		</property>
		<property name="initConn">
			<value>20</value>
		</property>
		<property name="minConn">
			<value>10</value>
		</property>
		<property name="maxConn">
			<value>50</value>
		</property>
		<property name="nagle">
			<value>false</value>
		</property>
		<property name="socketTO">
			<value>3000</value>
		</property>
	</bean>
	<bean id="memcachedClient" class="com.danga.MemCached.MemCachedClient">
		<constructor-arg>
			<value>neeaMemcachedPool</value>
		</constructor-arg>
	</bean>
</beans>

6.創建測試用例：

[java] view plain copy print ?

public class MemcachedSpringTest {
private MemCachedClient cachedClient;
@Before
public void init() {
ApplicationContext context = new ClassPathXmlApplicationContext("com/loujinhe/config/beans.xml");
cachedClient = (MemCachedClient)context.getBean("memcachedClient");
}
@Test
public void testMemcachedSpring() {
UserBean user = new UserBean("lou", "jason");
cachedClient.set("user", user);
UserBean cachedBean = (UserBean)user;
Assert.assertEquals(user, cachedBean);
}
}

原文地址：http://blog.csdn.net/loujinhe/article/details/8491673

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