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RedisTemplate 使用 pipeline 时需要注意的问题

news 2025/9/8 4:51:44

RedisTemplate 使用 pipeline 时需要注意的问题

RedisTemplate 使用 pipeline 进行批量 set 时，需要把 key 和 value 都转为字节

1. 直接使用 getBytes() 转为字节，在读取数据时，会抛出以下序列化异常

//错误代码
protected void process(ReconRedisContext reconRedisContext) {String key = this.getLockKey(reconRedisContext);Pagination pagination = this.queryReconData(reconRedisContext);if (ObjectUtils.isNotEmpty(pagination)&& CollectionUtils.isNotEmpty(pagination.getList())) {List<?> resList = pagination.getList();redisTemplate.executePipelined(new RedisCallback<Set<?>>() {@Overridepublic Set<?> doInRedis(RedisConnection connection) throws DataAccessException {resList.stream().forEach(value -> {connection.sAdd(key.getBytes(StandardCharsets.UTF_8), value.toString().getBytes(StandardCharsets.UTF_8));});return null;}});}}// 抛出序列化异常
org.springframework.data.redis.serializer.SerializationException: Could not read JSON: Unrecognized token 'value': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')

2. 需要使用 RedisTemplate 已经设置的 Serializer ，将key 和 value 序列化成byte数据，代码如下：

protected void process(ReconRedisContext reconRedisContext) {RedisSerializer keySerializer = redisTemplate.getKeySerializer();RedisSerializer valueSerializer = redisTemplate.getValueSerializer();String key = this.getLockKey(reconRedisContext);Pagination pagination = this.queryReconData(reconRedisContext);if (ObjectUtils.isNotEmpty(pagination)&& CollectionUtils.isNotEmpty(pagination.getList())) {List<?> resList = pagination.getList();redisTemplate.executePipelined(new RedisCallback<Set<?>>() {@Overridepublic Set<?> doInRedis(RedisConnection connection) throws DataAccessException {resList.stream().forEach(value -> {connection.sAdd(keySerializer.serialize(key), valueSerializer.serialize(value));});return null;}});}}

3. 异常原因：

// RedisTemplate 默认使用 DefaultSetOperations 存放数据的源码如下：
public Long add(K key, V... values) {byte[] rawKey = rawKey(key);byte[][] rawValues = rawValues((Object[]) values);return execute(connection -> connection.sAdd(rawKey, rawValues));
}byte[] rawKey(Object key) {Assert.notNull(key, "non null key required");if (keySerializer() == null && key instanceof byte[]) {return (byte[]) key;}return keySerializer().serialize(key);
}byte[] rawValue(Object value) {if (valueSerializer() == null && value instanceof byte[]) {return (byte[]) value;}return valueSerializer().serialize(value);
}