Examples of net.jini.core.transaction.UnknownTransactionException

net.jini.core.transaction.UnknownTransactionException
Exception thrown when a transaction is not recognized as a valid or known transaction. Common reasons for this include: the transaction has previously been explicitly aborted; the transaction has previously aborted because the transaction manager crashed; the transaction has previously been explicitly committed. @author Sun Microsystems, Inc. @since 1.0

  }


        if (txn == null) {
      final String msg = "unknown transaction [mgr:" + mgr + 
    ", id:" + id + "], passed to abort/prepare/commit";
      final UnknownTransactionException ute = 
    new UnknownTransactionException(msg);
      if (txnLogger.isLoggable(Levels.FAILED))
    txnLogger.log(Levels.FAILED, msg, ute);
      throw ute;
  }
        return txn;

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        try {
            return (ServerTransaction) baseTr;
        } catch (ClassCastException e) {
      final String msg = "unexpected transaction type:" + 
    baseTr.getClass();
      final UnknownTransactionException ute = 
    new UnknownTransactionException(msg);
      if (txnLogger.isLoggable(Levels.FAILED))
    txnLogger.log(Levels.FAILED, msg, ute);
      throw ute;
        }
    }

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  }


        if (txn == null) {
      final String msg = "unknown transaction [mgr:" + mgr + 
    ", id:" + id + "], passed to abort/prepare/commit";
      final UnknownTransactionException ute = 
    new UnknownTransactionException(msg);
      if (txnLogger.isLoggable(Levels.FAILED))
    txnLogger.log(Levels.FAILED, msg, ute);
      throw ute;
  }
        return txn;

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        try {
            return (ServerTransaction) baseTr;
        } catch (ClassCastException e) {
      final String msg = "unexpected transaction type:" + 
    baseTr.getClass();
      final UnknownTransactionException ute = 
    new UnknownTransactionException(msg);
      if (txnLogger.isLoggable(Levels.FAILED))
    txnLogger.log(Levels.FAILED, msg, ute);
      throw ute;
        }
    }

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        TxnManagerTransaction txntr =
    (TxnManagerTransaction) txns.get(new Long(id));


  if (txntr == null)
      throw new UnknownTransactionException("unknown transaction");


  // txntr.join does expiration check
  txntr.join(preparedTarget, crashCount);
        if (operationsLogger.isLoggable(Level.FINER)) {
            operationsLogger.exiting(

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        TxnManagerTransaction txntr =
          (TxnManagerTransaction) txns.get(new Long(id));


  if (txntr == null)
      throw new UnknownTransactionException("unknown transaction");
        /* Expiration checks are only meaningful for active transactions. */
        /* NOTE: 
   * 1) Cancellation sets expiration to 0 without changing state 
   * from Active right away. Clients are supposed to treat 
   * UnknownTransactionException just like Aborted, so it's OK to send
   * in this case. 
   * 2) Might be a small window where client is committing the transaction
   * close to the expiration time. If the committed transition takes
   * place between getState() and ensureCurrent then the client could get
   * a false result.
   */
//TODO - need better locking here. getState and expiration need to be checked atomically  
        int state = txntr.getState();
        if (state == ACTIVE && !ensureCurrent(txntr)) 
      throw new UnknownTransactionException("unknown transaction");
      
  if (operationsLogger.isLoggable(Level.FINER)) {
            operationsLogger.exiting(
    TxnManagerImpl.class.getName(), "getState", 
          new Integer(state));

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            transactionsLogger.log(Level.FINEST,
          "Retrieved TxnManagerTransaction: {0}", txntr);
  }


  if (txntr == null)
      throw new UnknownTransactionException("Unknown transaction");


  // txntr.commit does expiration check
  txntr.commit(waitFor);
        txns.remove(new Long(id));

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      } else {
        throw new CannotAbortException("Already committed");
      }
    }
  } else {  
      throw new UnknownTransactionException("No such transaction ["+id+"]");
  }


  txntr.abort(waitFor);
  txns.remove(new Long(id));

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        TxnManagerTransaction txntr =
          (TxnManagerTransaction) txns.get(new Long(id));


  if (txntr == null)
      throw new UnknownTransactionException("unknown transaction");


        Transaction tn = (Transaction) txntr.getTransaction();
        ServerTransaction tr = serverTransaction(tn);


        if (tr == null)
           throw new UnknownTransactionException(
               "TxnManagerImpl: getTransaction: "
                                             + "unable to find transaction(" +
               id + ")");
//TODO - use IDs vs equals               
        if (!tr.mgr.equals(this))
            throw new UnknownTransactionException("wrong manager (" + tr.mgr +
              " instead of " + this + ")");


        return tr;
    }

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                operationsLogger.exiting(TxnManagerImpl.class.getName(), 
                 "serverTransaction", baseTr);
      }
            return (ServerTransaction) baseTr;
        } catch (ClassCastException e) {
            throw new UnknownTransactionException("unexpected transaction type");
        }
    }

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com.sun.jini.mahalo.TxnManagerImpl

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