Spring-data-redis: 事务与pipeline

苏泽湛

　　本文主要展示如何使用spring-data-redis编写事务和pipeline：
　　1.配置文件：

<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" default-autowire="byName">
<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">
<property name="maxActive" value="32"></property>
<property name="maxIdle" value="6"></property>
<property name="maxWait" value="15000"></property>
<property name="minEvictableIdleTimeMillis" value="300000"></property>
<property name="numTestsPerEvictionRun" value="3"></property>
<property name="timeBetweenEvictionRunsMillis" value="60000"></property>
<property name="whenExhaustedAction" value="1"></property>
</bean>
<bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" destroy-method="destroy">
<property name="poolConfig" ref="jedisPoolConfig"></property>
<property name="hostName" value="127.0.0.1"></property>
<property name="port" value="6379"></property>
<property name="password" value="0123456"></property>
<property name="timeout" value="15000"></property>
<property name="usePool" value="true"></property>
</bean>
<bean id="jedisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory"></property>
<property name="keySerializer">
<bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
</property>
</bean>
</beans>
　　2. 程序实例：

package com.sample.redis.sdr;
public class RedisClientTest {
//private JsonRedisSeriaziler seriaziler;
private RedisTemplate redisTemplate;
public void setRedisTemplate(RedisTemplate redisTemplate) {
this.redisTemplate = redisTemplate;
}
public void valueOperationSample(){
ValueOperations<String, User> valueOper = redisTemplate.opsForValue();
User suser = new User(1,"zhangsan",12);
valueOper.set("user:" + suser.getId(),suser);
System.out.println(valueOper.get("user:" + suser.getId()).getName());
}
public void listOperationSample(){
User suser = new User(1,"zhangsan",12);
ListOperations<String, User> listOper = redisTemplate.opsForList();
listOper.leftPush("user:list", suser);//lpush,head
listOper.rightPush("user:list", suser);//rpush,tail
}
public void boundValueOperationSample(){
User suser = new User(1,"zhangsan",12);
BoundValueOperations<String, User> bvo = redisTemplate.boundValueOps("user:" + suser.getId());
bvo.set(suser);
bvo.expire(60, TimeUnit.MINUTES);
}
/**
* 非连接池环境下，事务操作；对于sdr而言，每次操作(例如，get，set)都有会从pool中获取connection；
* 因此在连接池环境下，使用事务需要注意。
*/
public void txUnusedPoolSample(){
User suser = new User(1,"zhangsan",12);
redisTemplate.watch("user:" + suser.getId());
redisTemplate.multi();
ValueOperations<String, User> tvo = redisTemplate.opsForValue();
tvo.set("user:" + suser.getId(), suser);
redisTemplate.exec();
}
/**
* 在连接池环境中，需要借助sessionCallback来绑定connection
*/
public void txUsedPoolSample(){
SessionCallback<User> sessionCallback = new SessionCallback<User>() {
@Override
public User execute(RedisOperations operations) throws DataAccessException {
operations.multi();
User user = new User(2,"lisi",32);
String key = "user:" + user.getId();
BoundValueOperations<String, User> oper = operations.boundValueOps(key);
oper.set(user);
oper.expire(60, TimeUnit.MINUTES);
operations.exec();
return user;
}
};
redisTemplate.execute(sessionCallback);
}
/**
* pipeline : 1，正确使用方式
*/
public void pipelineSample(){
final byte[] rawKey = redisTemplate.getKeySerializer().serialize("user_total");
//pipeline
RedisCallback<List<Object>> pipelineCallback = new RedisCallback<List<Object>>() {
@Override
public List<Object> doInRedis(RedisConnection connection) throws DataAccessException {
connection.openPipeline();
connection.incr(rawKey);
connection.incr(rawKey);
return connection.closePipeline();
}
};
List<Object> results = (List<Object>)redisTemplate.execute(pipelineCallback);
for(Object item : results){
System.out.println(item.toString());
}
}
//pipeline:备用方式
public void pipelineSampleX(){
byte[] rawKey = redisTemplate.getKeySerializer().serialize("user_total");
RedisConnectionFactory factory = redisTemplate.getConnectionFactory();
RedisConnection redisConnection = RedisConnectionUtils.getConnection(factory);
List<Object> results;
try{
redisConnection.openPipeline();
redisConnection.incr(rawKey);
results = redisConnection.closePipeline();
}finally{
RedisConnectionUtils.releaseConnection(redisConnection, factory);
}
if(results == null){
return;
}
for(Object item : results){
System.out.println(item.toString());
}
}
/**
* list/set排序，注意排序是根据value值的“字符”特性排序，如果value是java-object字节流，将不会有效
*/
public void sort(){
ListOperations<String, String> listOper = redisTemplate.opsForList();
String listKey = "user:list";
listOper.leftPush(listKey, "zhangsan");
listOper.leftPush(listKey, "lisi");
listOper.leftPush(listKey, "wanger");
SortQueryBuilder<String> builder = SortQueryBuilder.sort(listKey);
builder.alphabetical(true);//对字符串使用“字典顺序”
builder.order(Order.DESC);//倒序
builder.limit(0, 2);
//builder.limit(new Range(0, 2));
List<String> results = redisTemplate.sort(builder.build());
for(String item : results){
System.out.println(item);
}
}
}