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 }