| /** |
| * 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.hdfs.server.datanode; |
| |
| import java.io.*; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.DFSConfigKeys; |
| import org.apache.hadoop.hdfs.HdfsConfiguration; |
| import org.apache.hadoop.hdfs.MiniDFSCluster; |
| import org.apache.hadoop.hdfs.server.datanode.fsdataset.FsDatasetSpi; |
| import org.junit.Test; |
| |
| import static org.hamcrest.core.IsNot.not; |
| import static org.junit.Assert.*; |
| |
| |
| /** |
| * Test to verify that the DataNode Uuid is correctly initialized before |
| * FsDataSet initialization. |
| */ |
| public class TestDataNodeInitStorage { |
| public static final Log LOG = LogFactory.getLog(TestDataNodeInitStorage.class); |
| |
| static private class SimulatedFsDatasetVerifier extends SimulatedFSDataset { |
| static class Factory extends FsDatasetSpi.Factory<SimulatedFSDataset> { |
| @Override |
| public SimulatedFsDatasetVerifier newInstance( |
| DataNode datanode, DataStorage storage, |
| Configuration conf) throws IOException { |
| return new SimulatedFsDatasetVerifier(storage, conf); |
| } |
| |
| @Override |
| public boolean isSimulated() { |
| return true; |
| } |
| } |
| |
| public static void setFactory(Configuration conf) { |
| conf.set(DFSConfigKeys.DFS_DATANODE_FSDATASET_FACTORY_KEY, |
| Factory.class.getName()); |
| } |
| |
| // This constructor does the actual verification by ensuring that |
| // the DatanodeUuid is initialized. |
| public SimulatedFsDatasetVerifier(DataStorage storage, Configuration conf) { |
| super(storage, conf); |
| LOG.info("Assigned DatanodeUuid is " + storage.getDatanodeUuid()); |
| assert(storage.getDatanodeUuid() != null); |
| assert(storage.getDatanodeUuid().length() != 0); |
| } |
| } |
| |
| |
| @Test (timeout = 60000) |
| public void testDataNodeInitStorage() throws Throwable { |
| // Create configuration to use SimulatedFsDatasetVerifier#Factory. |
| Configuration conf = new HdfsConfiguration(); |
| SimulatedFsDatasetVerifier.setFactory(conf); |
| |
| // Start a cluster so that SimulatedFsDatasetVerifier constructor is |
| // invoked. |
| MiniDFSCluster cluster = |
| new MiniDFSCluster.Builder(conf).numDataNodes(1).build(); |
| cluster.waitActive(); |
| cluster.shutdown(); |
| } |
| } |