1 /*
2 * Copyright 2004-2022 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package com.ibatis.sqlmap.engine.transaction;
17
18 import java.sql.Connection;
19 import java.sql.SQLException;
20
21 /**
22 * The Class IsolationLevel.
23 */
24 public class IsolationLevel {
25
26 /** The Constant UNSET_ISOLATION_LEVEL. */
27 public static final int UNSET_ISOLATION_LEVEL = -9999;
28
29 /** The isolation level. */
30 private int isolationLevel = UNSET_ISOLATION_LEVEL;
31
32 /** The original isolation level. */
33 private int originalIsolationLevel = UNSET_ISOLATION_LEVEL;
34
35 /**
36 * Sets the isolation level.
37 *
38 * @param isolationLevel
39 * the new isolation level
40 */
41 public void setIsolationLevel(int isolationLevel) {
42 this.isolationLevel = isolationLevel;
43 }
44
45 /**
46 * Apply isolation level.
47 *
48 * @param conn
49 * the conn
50 *
51 * @throws SQLException
52 * the SQL exception
53 */
54 public void applyIsolationLevel(Connection conn) throws SQLException {
55 if (isolationLevel != UNSET_ISOLATION_LEVEL) {
56 originalIsolationLevel = conn.getTransactionIsolation();
57 if (isolationLevel != originalIsolationLevel) {
58 conn.setTransactionIsolation(isolationLevel);
59 }
60 }
61 }
62
63 /**
64 * Restore isolation level.
65 *
66 * @param conn
67 * the conn
68 *
69 * @throws SQLException
70 * the SQL exception
71 */
72 public void restoreIsolationLevel(Connection conn) throws SQLException {
73 if (isolationLevel != originalIsolationLevel) {
74 conn.setTransactionIsolation(originalIsolationLevel);
75 }
76 }
77
78 }