BackupStore.java 文件源码

/**
 * Write the given K,V to the cache. 
 * Write to memcache if space is available, else write to the filecache
 * @param key
 * @param value
 * @throws IOException
 */
public void write(DataInputBuffer key, DataInputBuffer value)
throws IOException {

  assert (key != null && value != null);

  if (fileCache.isActive()) {
    fileCache.write(key, value);
    return;
  }

  if (memCache.reserveSpace(key, value)) {
    memCache.write(key, value);
  } else {
    fileCache.activate();
    fileCache.write(key, value);
  }
}