OPENDJ-1472 : File based changelog : optimize random seek in each log file ...

Nicolas Capponi

22.06.2014 a73324289d9ff413e1935adc124227c9528442e7

OPENDJ-1472 : File based changelog : optimize random seek in each log file
CR-3727

[Note: real merge of all changelog.file package content to be done in one shot in
 a future commit]

Implements read and write with blocks, to enable binary search.

* New BlockLogReader class: read records sequentially or using
 binary search provided a key
 
* New BlockLogWriter class: write records by blocks

* New BlockLogReaderWriterTest class : tests read/write with blocks

* Update LogFile : delegate responsibility for read/write to BlockLogXXX

* Add method ByteStringBuilder#append(DataInput, int) to avoid 
 byte array copy

* Minor changes in other files

 opendj3-server-dev/src/messages/messages/replication.properties

@@ -616,4 +616,5 @@
ERR_CHANGELOG_UNABLE_TO_READ_REPLICA_OFFLINE_STATE_FILE_280=Could not read content of \
 replica offline state file '%s' for domain %s
ERR_CHANGELOG_UNABLE_TO_DELETE_REPLICA_OFFLINE_STATE_FILE_281=Could not delete replica \
 offline state file '%s' for domain %s and server id %d
 offline state file '%s' for domain %s and server id %d
ERR_CHANGELOG_UNABLE_TO_RETRIEVE_FILE_LENGTH_282=Could not retrieve file length of file '%s'

 opendj3-server-dev/src/server/org/opends/server/util/StaticUtils.java

@@ -3335,32 +3335,36 @@


  /**
   * Attempts to delete the specified file or directory.  If it is a directory,
   * Attempts to delete the specified file or directory. If it is a directory,
   * then any files or subdirectories that it contains will be recursively
   * deleted as well.
   *
   * @param  file  The file or directory to be removed.
   *
   * @return  <CODE>true</CODE> if the specified file and any subordinates are
   *          all successfully removed, or <CODE>false</CODE> if at least one
   *          element in the subtree could not be removed.
   * @param file
   *          The file or directory to be removed.
   * @return {@code true} if the specified file and any subordinates are all
   *         successfully removed, or {@code false} if at least one element in
   *         the subtree could not be removed or file does not exists.
   */
  public static boolean recursiveDelete(File file)
  {
    boolean successful = true;
    if (file.isDirectory())
    if (file.exists())
    {
      File[] childList = file.listFiles();
      if (childList != null)
      boolean successful = true;
      if (file.isDirectory())
      {
        for (File f : childList)
        File[] childList = file.listFiles();
        if (childList != null)
        {
          successful &= recursiveDelete(f);
          for (File f : childList)
          {
            successful &= recursiveDelete(f);
          }
        }
      }
    }

    return (successful & file.delete());
      return (successful & file.delete());
    }
    return false;
  }