最近在做redis的缓存这块,目前用Ubuntu server做了一个简单的redis server,在程序中集成了redis的支持配置,接下来需要做下redis集群管理和redis查询这块的内容,这里先把基本的配置稍稍记录下,接下来还需要对这部分内容做进一步的优化:
Spring-redis.xml:
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<?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-4.0.xsd"
default-lazy-init="false">
<!-- 连接池配置. -->
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<!-- 连接池中最大连接数。高版本:maxTotal,低版本:maxActive -->
<property name="maxTotal" value="8" />
<!-- 连接池中最大空闲的连接数. -->
<property name="maxIdle" value="4" />
<!-- 连接池中最少空闲的连接数. -->
<property name="minIdle" value="1" />
<!-- 当连接池资源耗尽时,调用者最大阻塞的时间,超时将跑出异常。单位,毫秒数;默认为-1.表示永不超时。高版本:maxWaitMillis,低版本:maxWait -->
<property name="maxWaitMillis" value="5000" />
<!-- 连接空闲的最小时间,达到此值后空闲连接将可能会被移除。负值(-1)表示不移除. -->
<property name="minEvictableIdleTimeMillis" value="300000" />
<!-- 对于“空闲链接”检测线程而言,每次检测的链接资源的个数。默认为3 -->
<property name="numTestsPerEvictionRun" value="3" />
<!-- “空闲链接”检测线程,检测的周期,毫秒数。如果为负值,表示不运行“检测线程”。默认为-1. -->
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<!-- testOnBorrow:向调用者输出“链接”资源时,是否检测是有有效,如果无效则从连接池中移除,并尝试获取继续获取。默认为false。建议保持默认值. -->
<!-- testOnReturn:向连接池“归还”链接时,是否检测“链接”对象的有效性。默认为false。建议保持默认值.-->
<!-- testWhileIdle:向调用者输出“链接”对象时,是否检测它的空闲超时;默认为false。如果“链接”空闲超时,将会被移除。建议保持默认值. -->
<!-- whenExhaustedAction:当“连接池”中active数量达到阀值时,即“链接”资源耗尽时,连接池需要采取的手段, 默认为1(0:抛出异常。1:阻塞,直到有可用链接资源。2:强制创建新的链接资源) -->
</bean>
<!-- Spring提供的Redis连接工厂 -->
<bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" destroy-method="destroy">
<!-- 连接池配置. -->
<property name="poolConfig" ref="jedisPoolConfig" />
<!-- Redis服务主机. -->
<property name="hostName" value="172.20.98.250" />
<!-- Redis服务端口号. -->
<property name="port" value="6379" />
<!-- Redis服务连接密码. -->
<property name="password" value="12345a*" />
<!-- 连超时设置. -->
<property name="timeout" value="15000" />
<!-- 是否使用连接池. -->
<property name="usePool" value="true" />
</bean>
<!-- Spring提供的访问Redis类. -->
<bean id="jedisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory" />
<property name="keySerializer">
<bean class="org.springframework.data.redis.serializer.StringRedisSerializer" />
</property>
<property name="valueSerializer">
<!-- <bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer" /> -->
<bean class="org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer" />
</property>
</bean>
</beans>
RedisCacheUtil
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package com.ict.web.commons.redis;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Service;
import java.io.Serializable;
import java.util.concurrent.TimeUnit;
@Service
public class RedisCacheUtil<T>
{
@Autowired @Qualifier("jedisTemplate")
private RedisTemplate<Serializable, Object> redisTemplate;
private Long defaultCacheExpireTime = 10l; // 缓存默认的过期时间,这里设置了10秒
public Object invoke(MethodInvocation invocation) throws Throwable {
Object value = null;
String targetName = invocation.getThis().getClass().getName();
String methodName = invocation.getMethod().getName();
Object[] arguments = invocation.getArguments();
String key = getCacheKey(targetName, methodName, arguments);
try {
// 判断是否有缓存
if (exists(key)) {
return getCache(key);
}
// 写入缓存
value = invocation.proceed();
if (value != null) {
final String tkey = key;
final Object tvalue = value;
new Thread(new Runnable() {
public void run() {
setCache(tkey, tvalue, defaultCacheExpireTime);
}
}).start();
}
} catch (Exception e) {
e.printStackTrace();
if (value == null) {
return invocation.proceed();
}
}
return value;
}
/**
* 创建缓存key
*
* @param targetName
* @param methodName
* @param arguments
*/
private String getCacheKey(String targetName, String methodName,
Object[] arguments) {
StringBuffer sbu = new StringBuffer();
sbu.append(targetName).append("_").append(methodName);
if ((arguments != null) && (arguments.length != 0)) {
for (int i = 0; i < arguments.length; i++) {
sbu.append("_").append(arguments[i]);
}
}
return sbu.toString();
}
/**
* 判断缓存中是否有对应的value
*
* @param key
* @return
*/
public boolean exists(final String key) {
return redisTemplate.hasKey(key);
}
/**
* 读取缓存
*
* @param key
* @return
*/
public Object getCache(final String key) {
Object result = null;
ValueOperations<Serializable, Object> operations = redisTemplate
.opsForValue();
try {
result = operations.get(key);
}catch (Exception e){
return null;
}
return result;
}
/**
* 写入缓存
*
* @param key
* @param value
* @return
*/
public boolean setCache(final String key, Object value, Long expireTime) {
boolean result = false;
try {
ValueOperations<Serializable, Object> operations = redisTemplate
.opsForValue();
operations.set(key, value);
redisTemplate.expire(key, expireTime, TimeUnit.SECONDS);
result = true;
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
}