content: /*
   *
   * 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.bookkeeper.bookie.storage.ldb;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  import com.google.common.collect.Lists;
  import java.io.File;
  import java.util.List;
  import org.apache.bookkeeper.bookie.BookieException;
  import org.apache.bookkeeper.bookie.EntryLogMetadata;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  
  /**
   * Unit test for {@link PersistentEntryLogMetadataMap}.
   */
  public class PersistentEntryLogMetadataMapTest {
  
      private final ServerConfiguration configuration;
  
      @Rule
      public TemporaryFolder tempFolder = new TemporaryFolder();
  
      public PersistentEntryLogMetadataMapTest() {
          this.configuration = new ServerConfiguration();
      }
  
      /**
       * Validates PersistentEntryLogMetadataMap functionalities.
       *
       * @throws Exception
       */
      @Test
      public void simple() throws Exception {
          File tmpDir = tempFolder.newFolder("metadata-cache");
          String path = tmpDir.getAbsolutePath();
          PersistentEntryLogMetadataMap entryMetadataMap = new PersistentEntryLogMetadataMap(path, configuration);
  
          List<EntryLogMetadata> metadatas = Lists.newArrayList();
          int totalMetadata = 1000;
          // insert entry-log-metadata records
          for (int i = 1; i <= totalMetadata; i++) {
              EntryLogMetadata entryLogMeta = createEntryLogMetadata(i, i);
              metadatas.add(entryLogMeta);
              entryMetadataMap.put(i, entryLogMeta);
          }
          for (int i = 1; i <= totalMetadata; i++) {
              assertTrue(entryMetadataMap.containsKey(i));
          }
  
          assertEquals(entryMetadataMap.size(), totalMetadata);
  
          entryMetadataMap.forEach((logId, metadata) -> {
              assertEquals(metadatas.get(logId.intValue() - 1).getTotalSize(), metadata.getTotalSize());
              for (int i = 0; i < logId.intValue(); i++) {
                  assertTrue(metadata.containsLedger(i));
              }
          });
  
          metadatas.forEach(meta -> {
              long logId = meta.getEntryLogId();
              try {
                  entryMetadataMap.forKey(logId, (entryLogId, persistedMeta) -> {
                      assertEquals(meta.getEntryLogId(), persistedMeta.getEntryLogId());
                      assertEquals(meta.getTotalSize(), persistedMeta.getTotalSize());
                      assertEquals(logId, (long) entryLogId);
                  });
              } catch (BookieException.EntryLogMetadataMapException e) {
                  throw new RuntimeException(e);
              }
          });
  
          // remove entry-log entry
          for (int i = 1; i <= totalMetadata; i++) {
              entryMetadataMap.remove(i);
          }
  
          // entries should not be present into map
          for (int i = 1; i <= totalMetadata; i++) {
              assertFalse(entryMetadataMap.containsKey(i));
          }
  
          assertEquals(entryMetadataMap.size(), 0);
  
          entryMetadataMap.close();
      }
  
      /**
       * Validates PersistentEntryLogMetadataMap persists metadata state in
       * rocksDB.
       *
       * @throws Exception
       */
      @Test
      public void closeAndOpen() throws Exception {
          File tmpDir = tempFolder.newFolder();
          String path = tmpDir.getAbsolutePath();
          PersistentEntryLogMetadataMap entryMetadataMap = new PersistentEntryLogMetadataMap(path, configuration);
  
          List<EntryLogMetadata> metadatas = Lists.newArrayList();
          int totalMetadata = 1000;
          for (int i = 1; i <= totalMetadata; i++) {
              EntryLogMetadata entryLogMeta = createEntryLogMetadata(i, i);
              metadatas.add(entryLogMeta);
              entryMetadataMap.put(i, entryLogMeta);
          }
          for (int i = 1; i <= totalMetadata; i++) {
              assertTrue(entryMetadataMap.containsKey(i));
          }
  
          // close metadata-map
          entryMetadataMap.close();
          // Open it again
          entryMetadataMap = new PersistentEntryLogMetadataMap(path, configuration);
  
          entryMetadataMap.forEach((logId, metadata) -> {
              assertEquals(metadatas.get(logId.intValue() - 1).getTotalSize(), logId.longValue());
              for (int i = 0; i < logId.intValue(); i++) {
                  assertTrue(metadata.containsLedger(i));
              }
          });
  
          entryMetadataMap.close();
      }
  
      private EntryLogMetadata createEntryLogMetadata(long logId, long totalLedgers) {
          EntryLogMetadata metadata = new EntryLogMetadata(logId);
          for (int i = 0; i < totalLedgers; i++) {
              metadata.addLedgerSize(i, 1);
          }
          return metadata;
      }
  }
  