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.client;
  
  import static org.apache.bookkeeper.meta.MetadataDrivers.runFunctionWithLedgerManagerFactory;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import com.google.common.collect.Lists;
  import com.google.common.util.concurrent.UncheckedExecutionException;
  import java.nio.ByteBuffer;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.List;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  import lombok.Cleanup;
  import org.apache.bookkeeper.client.BookKeeper.DigestType;
  import org.apache.bookkeeper.client.api.LedgerMetadata;
  import org.apache.bookkeeper.meta.HierarchicalLedgerManagerFactory;
  import org.apache.bookkeeper.meta.LedgerIdGenerator;
  import org.apache.bookkeeper.meta.LedgerManager;
  import org.apache.bookkeeper.meta.LedgerManagerFactory;
  import org.apache.bookkeeper.meta.LongHierarchicalLedgerManagerFactory;
  import org.apache.bookkeeper.net.BookieId;
  import org.apache.bookkeeper.net.BookieSocketAddress;
  import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.GenericCallback;
  import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.LedgerMetadataListener;
  import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
  import org.apache.bookkeeper.versioning.Version;
  import org.apache.bookkeeper.versioning.Versioned;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  import org.junit.runners.Parameterized.Parameters;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Test an EnsembleChange watcher.
   */
  @RunWith(Parameterized.class)
  public class TestWatchEnsembleChange extends BookKeeperClusterTestCase {
  
      static final Logger LOG = LoggerFactory.getLogger(TestWatchEnsembleChange.class);
  
      final DigestType digestType;
      final Class<? extends LedgerManagerFactory> lmFactoryCls;
  
      public TestWatchEnsembleChange(Class<? extends LedgerManagerFactory> lmFactoryCls) {
          super(7);
          this.digestType = DigestType.CRC32;
          this.lmFactoryCls = lmFactoryCls;
          baseClientConf.setLedgerManagerFactoryClass(lmFactoryCls);
          baseConf.setLedgerManagerFactoryClass(lmFactoryCls);
      }
  
      @SuppressWarnings("deprecation")
      @Parameters
      public static Collection<Object[]> configs() {
          return Arrays.asList(new Object[][] {
                  { org.apache.bookkeeper.meta.FlatLedgerManagerFactory.class },
                  { HierarchicalLedgerManagerFactory.class },
                  { LongHierarchicalLedgerManagerFactory.class },
                  { org.apache.bookkeeper.meta.MSLedgerManagerFactory.class },
          });
      }
  
      @Test
      public void testWatchEnsembleChange() throws Exception {
          int numEntries = 10;
          LedgerHandle lh = bkc.createLedger(3, 3, 3, digestType, "".getBytes());
          for (int i = 0; i < numEntries; i++) {
              lh.addEntry(("data" + i).getBytes());
              LOG.info("Added entry {}.", i);
          }
          LedgerHandle readLh = bkc.openLedgerNoRecovery(lh.getId(), digestType, "".getBytes());
          long lastLAC = readLh.getLastAddConfirmed();
          assertEquals(numEntries - 2, lastLAC);
          List<BookieId> ensemble =
              lh.getCurrentEnsemble();
          for (BookieId addr : ensemble) {
              killBookie(addr);
          }
          // write another batch of entries, which will trigger ensemble change
          for (int i = 0; i < numEntries; i++) {
              lh.addEntry(("data" + (numEntries + i)).getBytes());
              LOG.info("Added entry {}.", (numEntries + i));
          }
          TimeUnit.SECONDS.sleep(5);
          readLh.readLastConfirmed();
          assertEquals(2 * numEntries - 2, readLh.getLastAddConfirmed());
          readLh.close();
          lh.close();
      }
  
      @Test
      public void testWatchMetadataRemoval() throws Exception {
          baseConf.setMetadataServiceUri(zkUtil.getMetadataServiceUri());
          runFunctionWithLedgerManagerFactory(baseConf, factory -> {
              try {
                  testWatchMetadataRemoval(factory);
              } catch (Exception e) {
                  throw new UncheckedExecutionException(e.getMessage(), e);
              }
              return null;
          });
      }
  
      private void testWatchMetadataRemoval(LedgerManagerFactory factory) throws Exception {
          @Cleanup final LedgerManager manager = factory.newLedgerManager();
          @Cleanup LedgerIdGenerator idGenerator = factory.newLedgerIdGenerator();
  
          final ByteBuffer bbLedgerId = ByteBuffer.allocate(8);
          final CountDownLatch createLatch = new CountDownLatch(1);
          final CountDownLatch removeLatch = new CountDownLatch(1);
  
          List<BookieId> ensemble = Lists.newArrayList(new BookieSocketAddress("192.0.2.1", 1234).toBookieId(),
                  new BookieSocketAddress("192.0.2.2", 1234).toBookieId(),
                  new BookieSocketAddress("192.0.2.3", 1234).toBookieId(),
                  new BookieSocketAddress("192.0.2.4", 1234).toBookieId());
          idGenerator.generateLedgerId(new GenericCallback<Long>() {
                  @Override
                  public void operationComplete(int rc, final Long lid) {
                      LedgerMetadata metadata = LedgerMetadataBuilder.create()
                          .withId(lid)
                          .withDigestType(digestType.toApiDigestType()).withPassword(new byte[0])
                          .withEnsembleSize(4).withWriteQuorumSize(2)
                          .withAckQuorumSize(2)
                          .newEnsembleEntry(0L, ensemble).build();
                      manager.createLedgerMetadata(lid, metadata)
                          .whenComplete((result, exception) -> {
                                  bbLedgerId.putLong(lid);
                                  bbLedgerId.flip();
                                  createLatch.countDown();
                              });
                  }
              });
  
          assertTrue(createLatch.await(2000, TimeUnit.MILLISECONDS));
          final long createdLid = bbLedgerId.getLong();
  
          manager.registerLedgerMetadataListener(createdLid,
                  new LedgerMetadataListener() {
  
              @Override
              public void onChanged(long ledgerId, Versioned<LedgerMetadata> metadata) {
                  assertEquals(ledgerId, createdLid);
                  assertEquals(metadata, null);
                  removeLatch.countDown();
              }
          });
  
          manager.removeLedgerMetadata(createdLid, Version.ANY).get(2, TimeUnit.SECONDS);
          assertTrue(removeLatch.await(2, TimeUnit.SECONDS));
      }
  }
  