Exemple #1
0
  /**
   * 1. Get all the fragment buffers 2. When all are received -> Assemble them into one big buffer
   * 3. Read headers and byte buffer from big buffer 4. Set headers and buffer in msg 5. Pass msg up
   * the stack
   */
  private Message unfragment(Message msg, FragHeader hdr) {
    Address sender = msg.getSrc();
    FragmentationTable frag_table = fragment_list.get(sender);
    if (frag_table == null) {
      frag_table = new FragmentationTable(sender);
      try {
        fragment_list.add(sender, frag_table);
      } catch (
          IllegalArgumentException
              x) { // the entry has already been added, probably in parallel from another thread
        frag_table = fragment_list.get(sender);
      }
    }
    num_received_frags++;
    byte[] buf = frag_table.add(hdr.id, hdr.frag_id, hdr.num_frags, msg.getBuffer());
    if (buf == null) return null;

    try {
      DataInput in = new ByteArrayDataInputStream(buf);
      Message assembled_msg = new Message(false);
      assembled_msg.readFrom(in);
      assembled_msg.setSrc(sender); // needed ? YES, because fragments have a null src !!
      if (log.isTraceEnabled()) log.trace("assembled_msg is " + assembled_msg);
      num_received_msgs++;
      return assembled_msg;
    } catch (Exception e) {
      log.error(Util.getMessage("FailedUnfragmentingAMessage"), e);
      return null;
    }
  }
Exemple #2
0
  private void handleViewChange(View view) {
    List<Address> new_mbrs = view.getMembers();
    List<Address> left_mbrs = Util.determineLeftMembers(members, new_mbrs);
    members.clear();
    members.addAll(new_mbrs);

    for (Address mbr : left_mbrs) {
      // the new view doesn't contain the sender, it must have left,
      // hence we will clear all of itsfragmentation tables
      fragment_list.remove(mbr);
      if (log.isTraceEnabled())
        log.trace("[VIEW_CHANGE] removed " + mbr + " from fragmentation table");
    }
  }