| /** |
| * 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.coprocessor; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.io.IOException; |
| import java.util.Optional; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HBaseTestingUtility; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.Admin; |
| import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor; |
| import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder; |
| import org.apache.hadoop.hbase.client.TableDescriptor; |
| import org.apache.hadoop.hbase.client.TableDescriptorBuilder; |
| import org.apache.hadoop.hbase.testclassification.CoprocessorTests; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.ClassRule; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.junit.rules.TestName; |
| |
| @Category({ CoprocessorTests.class, MediumTests.class }) |
| public class TestMasterObserverToModifyTableSchema { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestMasterObserverToModifyTableSchema.class); |
| |
| private static HBaseTestingUtility UTIL = new HBaseTestingUtility(); |
| private static TableName TABLENAME = TableName.valueOf("TestTable"); |
| |
| @Rule |
| public TestName name = new TestName(); |
| |
| @BeforeClass |
| public static void setupBeforeClass() throws Exception { |
| Configuration conf = UTIL.getConfiguration(); |
| conf.set(CoprocessorHost.MASTER_COPROCESSOR_CONF_KEY, |
| OnlyOneVersionAllowedMasterObserver.class.getName()); |
| UTIL.startMiniCluster(1); |
| } |
| |
| @AfterClass |
| public static void tearDownAfterClass() throws Exception { |
| UTIL.shutdownMiniCluster(); |
| } |
| |
| @Test |
| public void testMasterObserverToModifyTableSchema() throws IOException { |
| TableDescriptorBuilder builder = TableDescriptorBuilder.newBuilder(TABLENAME); |
| for (int i = 1; i <= 3; i++) { |
| builder.setColumnFamily( |
| ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes("cf" + i)).setMaxVersions(i) |
| .build()); |
| } |
| try (Admin admin = UTIL.getAdmin()) { |
| admin.createTable(builder.build()); |
| assertOneVersion(admin.getDescriptor(TABLENAME)); |
| |
| builder.modifyColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes("cf1")) |
| .setMaxVersions(Integer.MAX_VALUE).build()); |
| admin.modifyTable(builder.build()); |
| assertOneVersion(admin.getDescriptor(TABLENAME)); |
| } |
| } |
| |
| private void assertOneVersion(TableDescriptor td) { |
| for (ColumnFamilyDescriptor cfd : td.getColumnFamilies()) { |
| assertEquals(1, cfd.getMaxVersions()); |
| } |
| } |
| |
| public static class OnlyOneVersionAllowedMasterObserver |
| implements MasterCoprocessor, MasterObserver { |
| |
| @Override |
| public Optional<MasterObserver> getMasterObserver() { |
| return Optional.of(this); |
| } |
| |
| @Override |
| public TableDescriptor preCreateTableRegionsInfos( |
| ObserverContext<MasterCoprocessorEnvironment> ctx, TableDescriptor desc) |
| throws IOException { |
| TableDescriptorBuilder builder = TableDescriptorBuilder.newBuilder(desc); |
| for (ColumnFamilyDescriptor cfd : desc.getColumnFamilies()) { |
| builder.modifyColumnFamily( |
| ColumnFamilyDescriptorBuilder.newBuilder(cfd).setMaxVersions(1).build()); |
| } |
| return builder.build(); |
| } |
| |
| @Override |
| public TableDescriptor preModifyTable(ObserverContext<MasterCoprocessorEnvironment> env, |
| TableName tableName, final TableDescriptor currentDescriptor, |
| final TableDescriptor newDescriptor) throws IOException { |
| TableDescriptorBuilder builder = TableDescriptorBuilder.newBuilder(newDescriptor); |
| for (ColumnFamilyDescriptor cfd : newDescriptor.getColumnFamilies()) { |
| builder.modifyColumnFamily( |
| ColumnFamilyDescriptorBuilder.newBuilder(cfd).setMaxVersions(1).build()); |
| } |
| return builder.build(); |
| } |
| } |
| } |