WALFile.java 文件源码

/**
 * Get the 'value' corresponding to the last read 'key'.
 *
 * @param val : The 'value' to be read.
 */
public synchronized void getCurrentValue(Writable val)
    throws IOException {
  if (val instanceof Configurable) {
    ((Configurable) val).setConf(this.conf);
  }
  // Position stream to 'current' value
  seekToCurrentValue();

  val.readFields(valIn);
  if (valIn.read() > 0) {
    log.info("available bytes: " + valIn.available());
    throw new IOException(val + " read " + (valBuffer.getPosition() - keyLength)
                          + " bytes, should read " +
                          (valBuffer.getLength() - keyLength));
  }
}