| /** |
| * 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.hadoop.hbase.regionserver; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.testclassification.RegionServerTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| /** |
| * Very basic tests. |
| * @see TestMultiVersionConcurrencyControl for more. |
| */ |
| @Category({RegionServerTests.class, SmallTests.class}) |
| public class TestMultiVersionConcurrencyControlBasic { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestMultiVersionConcurrencyControlBasic.class); |
| |
| @Test |
| public void testSimpleMvccOps() { |
| MultiVersionConcurrencyControl mvcc = new MultiVersionConcurrencyControl(); |
| long readPoint = mvcc.getReadPoint(); |
| MultiVersionConcurrencyControl.WriteEntry writeEntry = mvcc.begin(); |
| mvcc.completeAndWait(writeEntry); |
| assertEquals(readPoint + 1, mvcc.getReadPoint()); |
| writeEntry = mvcc.begin(); |
| // The write point advances even though we may have 'failed'... call complete on fail. |
| mvcc.complete(writeEntry); |
| assertEquals(readPoint + 2, mvcc.getWritePoint()); |
| } |
| } |