Method ioGetSet

src/main/java/org/sfj/ChiseledMap.java:501–511

(K key, V v)

  }

  public synchronized V ioGetSet(K key, V v) throws IOException {
    Objects.requireNonNull(v);
    Long addr = map.get(key);
    V ret = null;
    if (addr != null) {
      ret = fetch(addr, false, null).getValue();
    }
    long newAddr = append(key, v);
    map.put(key, newAddr);
    return ret;
  }

  /**
   * Copy only live entries to another file. Blocks writes to this map