get method

V? get(
  1. String key
)

获取缓存数据

Implementation

V? get(String key) {
  switch (mode) {
    case CacheMode.memory:
      return _memoryCache?.get(key);

    case CacheMode.persistent:
      return _persistentCache?.get(key);

    case CacheMode.hybrid:
      // 先查内存
      final memoryValue = _memoryCache?.get(key);
      if (memoryValue != null) return memoryValue;

      // 内存 miss，查磁盘
      final diskValue = _persistentCache?.get(key);
      if (diskValue != null) {
        // 加载到内存
        _memoryCache?.put(key, diskValue);
      }
      return diskValue;
  }
}