How to use

writableByteCount

method

in

org.springframework.core.io.buffer.DefaultDataBuffer

@Override
public DataBuffer ensureCapacity(int length) {
  if (length > writableByteCount()) {
    int newCapacity = calculateCapacity(this.writePosition + length);
    capacity(newCapacity);
  }
  return this;
}

@Override
public DataBuffer ensureCapacity(int length) {
  if (length > writableByteCount()) {
    int newCapacity = calculateCapacity(this.writePosition + length);
    capacity(newCapacity);
  }
  return this;
}

@Override
public DataBuffer ensureCapacity(int length) {
  if (length > writableByteCount()) {
    int newCapacity = calculateCapacity(this.writePosition + length);
    capacity(newCapacity);
  }
  return this;
}

private void ensureCapacity(int length) {
  if (length <= writableByteCount()) {
    return;
  }
  int newCapacity = calculateCapacity(this.writePosition + length);
  capacity(newCapacity);
}