Map<File, DirectoryHolder> findFiles(String partialFileName) {
    dirCounter = 0;
    Map<File, DirectoryHolder> backupFiles = new HashMap<>();
    FilenameFilter backupFileFilter = getFileNameFilter(partialFileName);

    for (DirectoryHolder dh : parent.directories) {
      File[] backupList = dh.getDir().listFiles(backupFileFilter);
      if (backupList != null) {
        for (File f : backupList) {
          backupFiles.put(f, dh);
        }
      }
    }

    return backupFiles;
  }
Get the oplog specified

@param id int oplogId to be got
@return Oplogs the oplog corresponding to the oplodId, id
geode-core/src/main/java/org/apache/geode/internal/cache/PersistentOplogSet.java