| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| #ifdef CSTX_COMMENTED |
| #pragma once |
| |
| |
| #include "geode_defs.hpp" |
| #include "TransactionEvent.hpp" |
| |
| |
| namespace Apache |
| { |
| namespace Geode |
| { |
| namespace Client |
| { |
| |
| /// <summary> |
| /// A callback that is allowed to veto a transaction. Only one TransactionWriter can exist |
| /// per cache, and only one TransactionWriter will be fired in the |
| /// entire distributed system for each transaction. |
| /// This writer can be used to update a backend data source before the Geode |
| /// cache is updated during commit. If the backend update fails, the implementer |
| /// can throw a {<c>TransactionWriterException</c>} to veto the transaction. |
| /// </summary> |
| /// <seealso cref="CacheTransactionManager.SetWriter" /> |
| generic<class TKey, class TValue> |
| public interface class ITransactionWriter |
| { |
| public: |
| /// <summary> |
| /// Called before the transaction has finished committing, but after conflict checking. |
| /// Provides an opportunity for implementors to cause transaction abort by throwing a |
| /// TransactionWriterException |
| /// </summary> |
| /// <param name="te">the transaction event</param> |
| /// <exception cref="TransactionWriterException"> |
| /// in the event that the transaction should be rolled back |
| /// </exception> |
| /// <seealso cref="CacheTransactionManager.Commit" /> |
| void BeforeCommit(TransactionEvent<TKey, TValue>^ te); |
| |
| }; |
| } // namespace Client |
| } // namespace Geode |
| } // namespace Apache |
| |
| #endif |