1 package org.apache.onami.persist;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 /**
23 * Interface which hides away the details of inner (nested) and outer transactions as well as the details between
24 * {@link javax.persistence.EntityTransaction} and {@link javax.transaction.UserTransaction}.
25 */
26 interface TransactionFacade
27 {
28
29 /**
30 * Starts a transaction.
31 * <p/>
32 * The first call to begin will start the outer transaction. Subsequent calls will start a inner transaction.
33 */
34 void begin();
35
36 /**
37 * Commits a transaction.
38 * <p/>
39 * Only the outer transaction can be committed. Calls to commit on inner transactions have no effect.
40 */
41 void commit();
42
43 /**
44 * Rolls a transaction back.
45 * <p/>
46 * Only the outer transaction can be rolled back. Calls to rollback on inner transactions will set the rollbackOnly
47 * flag on the outer transaction. Setting this flag wil cause an outer transaction to be rolled back in any case.
48 */
49 void rollback();
50
51 }