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;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertFalse;
  
  import java.io.File;
  import java.lang.reflect.Field;
  import java.util.ArrayList;
  import java.util.Enumeration;
  import java.util.List;
  import org.apache.bookkeeper.client.BookKeeper.DigestType;
  import org.apache.bookkeeper.client.LedgerEntry;
  import org.apache.bookkeeper.client.LedgerHandle;
  import org.apache.bookkeeper.conf.ServerConfiguration;
  import org.apache.bookkeeper.proto.BookieServer;
  import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
  import org.awaitility.Awaitility;
  import org.junit.Test;
  
  /**
   * Test the bookie with multiple journals.
   */
  public class BookieMultipleJournalsTest extends BookKeeperClusterTestCase {
  
      public BookieMultipleJournalsTest() {
          super(1);
      }
  
      protected ServerConfiguration newServerConfiguration(int port, File journalDir,
              File[] ledgerDirs) {
          ServerConfiguration conf = super.newServerConfiguration(port, journalDir, ledgerDirs);
  
          // Use 4 journals
          String[] journalDirs = new String[4];
          for (int i = 0; i < 4; i++) {
              journalDirs[i] = journalDir.getAbsolutePath() + "/journal-" + i;
          }
          conf.setJournalDirsName(journalDirs);
  
          return conf;
      }
  
      @Test
      @SuppressWarnings("unchecked")
      public void testJournalExit() throws Exception {
  
          LedgerHandle ledgerHandle = bkc.createLedger(1, 1, DigestType.CRC32, new byte[0]);
          for (int i = 0; i < 10; i++) {
              ledgerHandle.addEntry(("entry-" + i).getBytes());
          }
  
          BookieServer bookieServer = serverByIndex(0);
          BookieImpl bookie = (BookieImpl) bookieServer.getBookie();
          Field journalList = bookie.getClass().getDeclaredField("journals");
          journalList.setAccessible(true);
          List<Journal> journals = (List<Journal>) journalList.get(bookie);
          journals.get(0).interruptThread();
          Awaitility.await().untilAsserted(() -> assertFalse(bookie.isRunning()));
      }
  
      @Test
      @SuppressWarnings("unchecked")
      public void testJournalExitAndShutdown() throws Exception {
  
          LedgerHandle ledgerHandle = bkc.createLedger(1, 1, DigestType.CRC32, new byte[0]);
          for (int i = 0; i < 10; i++) {
              ledgerHandle.addEntry(("entry-" + i).getBytes());
          }
  
          BookieServer bookieServer = serverByIndex(0);
          BookieImpl bookie = (BookieImpl) bookieServer.getBookie();
          Field journalList = bookie.getClass().getDeclaredField("journals");
          journalList.setAccessible(true);
          List<Journal> journals = (List<Journal>) journalList.get(bookie);
          journals.get(0).interruptThread();
          bookie.shutdown(ExitCode.OK);
          Awaitility.await().untilAsserted(() -> assertFalse(bookie.isRunning()));
      }
  
      @Test
      public void testMultipleWritesAndBookieRestart() throws Exception {
          // Creates few ledgers so that writes are spread across all journals
          final int numLedgers = 16;
          final int numEntriesPerLedger = 30;
          List<LedgerHandle> writeHandles = new ArrayList<>();
  
          for (int i = 0; i < numLedgers; i++) {
              writeHandles.add(bkc.createLedger(1, 1, DigestType.CRC32, new byte[0]));
          }
  
          for (int i = 0; i < numEntriesPerLedger; i++) {
              for (int j = 0; j < numLedgers; j++) {
                  writeHandles.get(j).addEntry(("entry-" + i).getBytes());
              }
          }
  
          restartBookies();
  
          // Write another set of entries
          for (int i = numEntriesPerLedger; i < 2 * numEntriesPerLedger; i++) {
              for (int j = 0; j < numLedgers; j++) {
                  writeHandles.get(j).addEntry(("entry-" + i).getBytes());
              }
          }
  
          restartBookies();
  
          List<LedgerHandle> readHandles = new ArrayList<>();
  
          for (int i = 0; i < numLedgers; i++) {
              readHandles.add(bkc.openLedger(writeHandles.get(i).getId(), DigestType.CRC32, new byte[0]));
          }
  
          for (int i = 0; i < numLedgers; i++) {
              Enumeration<LedgerEntry> entries = readHandles.get(i).readEntries(0, numEntriesPerLedger - 1);
  
              for (int j = 0; j < numEntriesPerLedger; j++) {
                  LedgerEntry entry = entries.nextElement();
                  assertEquals("entry-" + j, new String(entry.getEntry()));
              }
          }
      }
  
  }
  