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); } } }