private Integer getIntValue(Attributes atts, String param) {
    String maxInputFileSizeMB = atts.getValue(param);
    if (maxInputFileSizeMB != null) {
      try {
        return Integer.valueOf(maxInputFileSizeMB);
      } catch (NumberFormatException e) {
        throw new CacheXmlException(
            String.format("%s is not a valid integer for %s",
                maxInputFileSizeMB, param),
            e);
      }
    }
    return null;
  }
When a <code>disk-store</code> element is first encountered, we create a
{@link DiskStoreAttributes}, populate it accordingly, and push it on the stack.
geode-core/src/main/java/org/apache/geode/internal/cache/xmlcache/CacheXmlParser.java