public void handleIncomingUpdate(Request msg) throws DialogStateException {
    assert TransactionUtils.isTransactionExecutionThread()
        : "Code run in wrong thread. Must be run in TransactionThread. Now in "
            + Thread.currentThread();
    assert !done.get();

    if (!done.get()) {
      Logger.log("Remote party has sent update");

      final Dialog dialog = getStackContext().getDialogStorage().findDialogForMessage(msg);
      assert dialog != null;

      checkUpdatePreconditions(dialog, msg);

      Logger.log(TAG, "mark dialog as update in progress");
      dialog.markUpdateInProgress(InitiateParty.REMOTE);

      // TransactionType<InviteSrvTransaction, ? extends ServerCommonInviteTransaction>
      // transactionType = SIP_REINVITE_SERVER;
      TransactionType<UpdateSrvTransaction, UpdateServerTransaction> transactionType =
          SIP_UPDATE_SERVER;

      doHandleIncomingUpdate(msg, dialog, transactionType);
    }
  }