hadoop-ozone/tools/src/test/java/org/apache/hadoop/ozone/fsck/TestContainerMapper.java

/**
 * 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.ozone.fsck;

import org.apache.hadoop.hdds.client.ReplicationFactor;
import org.apache.hadoop.hdds.client.ReplicationType;
import org.apache.hadoop.hdds.conf.OzoneConfiguration;
import org.apache.hadoop.hdds.scm.ScmConfigKeys;
import org.apache.hadoop.hdds.scm.protocolPB.StorageContainerLocationProtocolClientSideTranslatorPB;
import org.apache.hadoop.ozone.MiniOzoneCluster;
import org.apache.hadoop.ozone.client.*;
import org.apache.hadoop.ozone.client.io.OzoneOutputStream;
import org.apache.hadoop.ozone.om.OzoneManager;
import org.apache.hadoop.test.GenericTestUtils;
import org.apache.ratis.util.FileUtils;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import java.util.*;
import static org.apache.hadoop.ozone.om.OMConfigKeys.OZONE_OM_DB_DIRS;
import static org.junit.Assert.*;

/**
 * Test cases for ContainerMapper.
 */

public class TestContainerMapper {

  private static MiniOzoneCluster cluster = null;
  private static OzoneClient ozClient = null;
  private static ObjectStore store = null;
  private static OzoneManager ozoneManager;
  private static StorageContainerLocationProtocolClientSideTranslatorPB
      storageContainerLocationClient;
  private static final String SCM_ID = UUID.randomUUID().toString();
  private static String volName = UUID.randomUUID().toString();
  private static String bucketName = UUID.randomUUID().toString();
  private static OzoneConfiguration conf;
  private static List<String> keyList = new ArrayList<>();
  private static String dbPath;


  @BeforeClass
  public static void init() throws Exception {
    conf = new OzoneConfiguration();
    dbPath = GenericTestUtils.getRandomizedTempPath();
    conf.set(OZONE_OM_DB_DIRS, dbPath);
    conf.set(ScmConfigKeys.OZONE_SCM_CONTAINER_SIZE, "100MB");
    cluster = MiniOzoneCluster.newBuilder(conf)
        .setNumDatanodes(1)
        .setScmId(SCM_ID)
        .build();
    cluster.waitForClusterToBeReady();
    ozClient = OzoneClientFactory.getRpcClient(conf);
    store = ozClient.getObjectStore();
    storageContainerLocationClient =
        cluster.getStorageContainerLocationClient();
    ozoneManager = cluster.getOzoneManager();
    store.createVolume(volName);
    OzoneVolume volume = store.getVolume(volName);
    volume.createBucket(bucketName);
    OzoneBucket bucket = volume.getBucket(bucketName);
    byte[] data = generateData(10 * 1024 * 1024, (byte)98);

    for (int i = 0; i < 20; i++) {
      String key = UUID.randomUUID().toString();
      keyList.add(key);
      OzoneOutputStream out = bucket.createKey(key, data.length,
          ReplicationType.STAND_ALONE, ReplicationFactor.ONE,
          new HashMap<String, String>());
      out.write(data, 0, data.length);
      out.close();
    }
    cluster.stop();
  }

  @Test
  public void testContainerMapper() throws Exception {
    ContainerMapper containerMapper = new ContainerMapper();
    Map<Long, List<Map<Long, BlockIdDetails>>> dataMap =
        containerMapper.parseOmDB(conf);
    // As we have created 20 keys with 10 MB size, and each
    // container max size is 100 MB, it should create 3 containers because
    // containers are closing before reaching the threshold
    assertEquals(3, dataMap.size());
  }

  private static byte[] generateData(int size, byte val) {
    byte[] chars = new byte[size];
    Arrays.fill(chars, val);
    return chars;
  }

  @AfterClass
  public static void shutdown() throws IOException {
    cluster.shutdown();
    FileUtils.deleteFully(new File(dbPath));
  }
}