SpringData Redis ValueOperations Sınıfı - Key/Value İşlemler İçindir

Giriş

Şu satırı dahil ederiz

import org.springframework.data.redis.core.ValueOperations;

get metodu

Örnek

Elimizde şöyle bir kod olsun.

private RedisTemplate<String, Object> redisTemplate = ...;

Şöyle yaparız.

ValueOperations<String, String> valueOperations  = redisTemplate.opsForValue();

String key = ...;

String value = valueOperations.get(key);

Örnek

Şöyle yaparız

RedisTemplate<String, Object> redisTemplate = ...;

private Optional<KeyValuePair> checkInCache(String key) {

  try {
    Object entryInCache = redisTemplate.opsForValue().get(key);
    return Optional.of(objectMapper.readValue(entryInCache.toString(),KeyValuePair.class));

  } catch (Exception e) {
    ...
  }
  return Optional.empty();

}

@Override
public KeyValuePair findByKey(String key) {
  return checkInCache(key).orElseGet(()->this.getFromDb(key));
}

increment metodu

Örnek

Şöyle yaparız

String name = ...
long count = redisTemplate.opsForValue().increment(name, 1);

set metodu

Örnek

Şöyle yaparız

@Component
public class RedisUtil<T> {
  private RedisTemplate<String, T> redisTemplate;
  private ValueOperations<String, T> valueOperations;
  

  @Autowired
  public RedisUtil(RedisTemplate<String, T> redisTemplate) {
    this.redisTemplate = redisTemplate;
    this.valueOperations = redisTemplate.opsForValue();
  }

  //region String
  public void putValue(String key, T value) {
    valueOperations.set(key, value);
  }

  public T getValue(String key) {
    return valueOperations.get(key);
  }
  ...
}