1 /**
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package org.apache.hadoop.hbase.regionserver;
19
20 import static org.junit.Assert.assertEquals;
21
22 import org.apache.hadoop.hbase.testclassification.SmallTests;
23 import org.junit.Test;
24 import org.junit.experimental.categories.Category;
25
26 /**
27 * Very basic tests.
28 * @see TestMultiVersionConcurrencyControl for more.
29 */
30 @Category({SmallTests.class})
31 public class TestMultiVersionConcurrencyControlBasic {
32 @Test
33 public void testSimpleMvccOps() {
34 MultiVersionConcurrencyControl mvcc = new MultiVersionConcurrencyControl();
35 long readPoint = mvcc.getReadPoint();
36 MultiVersionConcurrencyControl.WriteEntry writeEntry = mvcc.begin();
37 mvcc.completeAndWait(writeEntry);
38 assertEquals(readPoint + 1, mvcc.getReadPoint());
39 writeEntry = mvcc.begin();
40 // The write point advances even though we may have 'failed'... call complete on fail.
41 mvcc.complete(writeEntry);
42 assertEquals(readPoint + 2, mvcc.getWritePoint());
43 }
44 }