Redis
高并并发架构:
nginx+tomcat集群+Redis+ActiveMQ
redis缓存案例如下:
test代码:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:spring/applicationContext.xml"})
public class UserDaoRedisTest {
@Autowired
private UserServiceRedis userServiceRedis;
@Test
public void testCrud() {
// -------------- Create ---------------
String uid = "u123456";
String address1 = "上海";
User_Redis user = new User_Redis();
user.setAddress(address1);
user.setUid(uid);
userServiceRedis.save(user);
System.out.println("执行save....");
// ---------------Read ---------------
user = userServiceRedis.read(uid);
assertEquals(address1, user.getAddress());
System.out.println("执行read...."+user.getAddress()+user.getUid());
// --------------Update ------------
String address2 = "北京";
user.setAddress(address2);
userServiceRedis.save(user);
user = userServiceRedis.read(uid);
assertEquals(address2, user.getAddress());
// --------------Delete ------------
userServiceRedis.delete(uid);
System.out.println("执行delete....");
user = userServiceRedis.read(uid);
assertNull(user);
}
}
RedisDao:
@Repository
public class UserDaoImplRedis implements UserDaoRedis {
@Autowired
private RedisTemplate<Serializable, Serializable> redisTemplate;
@Override
public void save(final User_Redis user) {
redisTemplate.execute(new RedisCallback<Object>() {
@Override
public Object doInRedis(RedisConnection connection)
throws DataAccessException {
connection.set(
redisTemplate.getStringSerializer().serialize(
"user.uid." + user.getUid()),
redisTemplate.getStringSerializer().serialize(
user.getAddress()));
return null;
}
});
}
public void saveObject(final User_Redis user) {
redisTemplate.execute(new RedisCallback<Object>() {
@Override
public Object doInRedis(RedisConnection connection)
throws DataAccessException {
connection.set(
redisTemplate.getStringSerializer().serialize(
"user.uid." + user.getUid()),
redisTemplate.getStringSerializer().serialize(
user.getAddress())
);
connection.keys(redisTemplate.getStringSerializer().serialize("*"));
return null;
}
});
}
@Override
public User_Redis read(final String uid) {
return redisTemplate.execute(new RedisCallback<User_Redis>() {
@Override
public User_Redis doInRedis(RedisConnection connection)
throws DataAccessException {
byte[] key = redisTemplate.getStringSerializer().serialize(
"user.uid." + uid);
if (connection.exists(key)) {
byte[] value = connection.get(key);
String address = redisTemplate.getStringSerializer()
.deserialize(value);
User_Redis user = new User_Redis();
user.setAddress(address);
user.setUid(uid);
return user;
}
return null;
}
});
}
@Override
public void delete(final String uid) {
redisTemplate.execute(new RedisCallback<Object>() {
public Object doInRedis(RedisConnection connection) {
connection.del(redisTemplate.getStringSerializer().serialize(
"user.uid." + uid));
return null;
}
});
}
}
Spring 配置:
<!-- 自动扫描(自动注入) -->
<bean
id="jedisPoolConfig"
class="redis.clients.jedis.JedisPoolConfig"
>
<property
name="maxActive"
value="${redis.pool.maxActive}" />
<property
name="maxIdle"
value="${redis.pool.maxIdle}" />
<property
name="maxWait"
value="${redis.pool.maxWait}" />
<property
name="testOnBorrow"
value="${redis.pool.testOnBorrow}" />
</bean>
<bean
id="jedisConnectionFactory"
class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
>
<property
name="hostName"
value="${redis.ip}" />
<property
name="port"
value="${redis.port}" />
<property
name="poolConfig"
ref="jedisPoolConfig" />
</bean>
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
p:connection-factory-ref="jedisConnectionFactory" />
引用的参数:
#最大分配的对象数
redis.pool.maxActive=1024
#最大能够保持idel状态的对象数
redis.pool.maxIdle=200
#当池内没有返回对象时,最大等待时间
redis.pool.maxWait=1000
#当调用borrow Object方法时,是否进行有效性检查
redis.pool.testOnBorrow=true
#IP
redis.ip=127.0.0.1
#Port
redis.port=6379
pom.xml引用的包
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>1.0.2.RELEASE</version>
</dependency>
Redis服务端测试命令windows:
启动服务端:
cmd找到redis的跟目录下执行redis-server.exe redis.conf
测试客户端:
新开一个窗口cmd找到redis的跟目录下执行redis-cli.exe -h 127.0.0.1 -p 6379
127.0.0.1是我本机IP地址,端口6379就是上面配置文件中指定的监听端口
执行一条保存key value操作
set mystock 300156
再查询一下
get mystock
Redis session共享配置:
session 共享配置:
1、准备两个tomcat,端口区分开,例如8001,8002,注意一点是,tomcat server.xml其它端口也要修改为不同的,例如shutdown端口,否则无法同时启动两个tomcat
2、把同一个应用分别放置在两个tomcat中,然后测试是否正常访问两个应用。
3、停止tomcat,修改conf/文件夹下的context.xml文件,文件的context节点内添加如下配置,一定要注意h、p要和redis服务端配置的保持一致。
<Valve classname="com.radiadesign.catalina.session.RedisSessionHandlerValve" />
<Manager classname="com.radiadesign.catalina.session.RedisSessionManager"
host="127.0.0.1"
port="6379"
database="0"
maxInactiveInterval="60" />
4、OK,配置完毕,来测试应用,启动tomcat1,直接登录应用,拷贝tomcat登陆后的URL,打开新的网页选项卡,粘贴tomcat1的地址,然后修改端口号为8002,然后访问
你会发现直接登录进去了。然后退出tomcat2的应用,刷新tomcat1的界面,你会发现tomcat1自动退出了,OK,证明session共享功能正确。
注意:配置session共享,在tomcat 的lib中要需要三个jar包,Commons-Pool Jedis tomcat-redis-session-manager
redis相关文章:http://blog.nosqlfan.com/html/3537.html