今天在测试spring Redis的时候出现这么个：org.springframework.dao.InvalidDataAccessApiUsageException: ERR EXEC without MULTI; nested exception is redis.clients.jedis.exceptions.JedisDataException: ERR EXEC without MULTI 另外还报：java.lang.NullPointerException先记录下，http://stackoverflow.com/questions/11148383/how-to-implement-redis-multi-exec-by-using-spring-data-redisAll Spring Configuration is written properly. Non-Multi-Exec Redis operations work perfectly.@Autowired@Qualifier("stringRedisTemplate")StringRedisTemplate template;void test(){ template.multi(); template.boundValueOps("somevkey").increment(1); template.boundZSetOps("somezkey").add("zvalue", timestamp); template.exec();}After running above code through Junit Test, Exceptions are thrown.Unknown exception; nested exception is org.springframework.data.redis.RedisSystemException: Unknown jedis exception; nested exception is java.lang.NullPointerExceptionThe reason for the exception is probably that the Spring template implementation does not reuse the same connection for .multi() and .exec(). You can try to use execute() via a callback:private RedisTemplate template = ...;template.execute(new RedisCallback() {@Overridepublic Object doInRedis(RedisConnection connection) throws DataAccessException {connection.multi();//do whatever you need, like deleting and repopulating some keysconnection.expire(CHANNEL_KEY.getBytes(), EXPIRE_SECS);connection.exec();return null;});先记录下，希望明天去公司能搞定http://forum.springsource.org/archive/index.php/t-125387.htmlHello!I am getting very many exceptions and strange results using redisTemplate and it's callbacks.Problems we spotted in:
Multi-Discard using RedisCallbackMulti-Exec using RedisCallbackWatch-Multi-Exec using RedisCallbackMulti-Exec in pipelined RedisCallbackWatch-Multi-Unwatch-Exec using RedisCallbackAlso two bugs we spotted and added to JIRA: DATAREDIS-87, DATAREDIS-88For some reason I was not able to attach file with code. Will email it on demand.Sample:@Testpublic void testMultiDiscard1() throws Exception {redisTemplate.execute(new RedisCallback<Object>() {@Overridepublic Object doInRedis(RedisConnection connection) throws DataAccessException {connection.set("a".getBytes(), "b".getBytes());assertEquals(1, redisTemplate.keys("a").size());connection.multi();assertEquals(1, redisTemplate.keys("a").size());connection.set("a".getBytes(), "bbb".getBytes());connection.append("a".getBytes(), "ccc".getBytes());connection.hSet("a1".getBytes(), "field1".getBytes(), "1000".getBytes());connection.hIncrBy("a1".getBytes(), "field1".getBytes(), 10);Map<byte[], byte[]> args = new HashMap<byte[], byte[]>(3);args.put("field2".getBytes(), "valueX".getBytes());args.put("field3".getBytes(), "valueY".getBytes());args.put("field4".getBytes(), "000".getBytes());connection.hMSet("a2".getBytes(), args);connection.append("a3".getBytes(), "bunny".getBytes());assertEquals(1, redisTemplate.keys("a").size());assertTrue(redisTemplate.keys("a1").isEmpty());connection.discard();return null;}}, true);assertNotNull(redisTemplate.opsForValue().get("a"));assertTrue(redisTemplate.opsForHash().values("a1").isEmpty());}I was working on a redis mock to be able to test without real redis. When run the tests on real one quite a big number of them failed, but shouldn't (as for me).Maybe I'm doing smth wrong?Thanks in advance!
Building Applications with Spring Data Redishttp://www.packtpub.com/article/building-applications-spring-data-redis
