/**
* 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.testclassification.RegionServerTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
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 {
@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());
}
}