| /* |
| * 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. |
| */ |
| |
| package org.apache.sentry.provider.db.service.persistent; |
| |
| import javax.jdo.PersistenceManager; |
| |
| /** |
| * TransactionBlock wraps the code that is executed inside a single |
| * transaction. The {@link #execute(PersistenceManager)} method returns the |
| * result of the transaction. |
| */ |
| public interface TransactionBlock<T> { |
| /** |
| * Execute some code as a single transaction, the code should not start new |
| * transaction or manipulate transactions with the PersistenceManager. |
| * |
| * @param pm PersistenceManager for the current transaction |
| * @return Object with the result of execute() |
| * @throws Exception |
| */ |
| T execute(PersistenceManager pm) throws Exception; |
| } |