001/*
002 * Copyright 2015-2018 Transmogrify LLC.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.pyranid;
018
019/**
020 * Represents a transactional operation capable of returning a value.
021 * <p>
022 * See {@link TransactionalOperation} for a variant with a {@code void} return type.
023 * 
024 * @author <a href="http://revetkn.com">Mark Allen</a>
025 * @since 1.0.0
026 */
027@FunctionalInterface
028public interface ReturningTransactionalOperation<T> {
029  /**
030   * Executes a transactional operation.
031   * 
032   * @return the result of execution, may be {@code null}
033   * @throws Throwable
034   *           if an error occurs while executing the transactional operation
035   */
036  T perform() throws Throwable;
037}