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 java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.CompletableFuture;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.Future;
  import java.util.concurrent.TimeUnit;
  import org.apache.bookkeeper.client.BookKeeper.DigestType;
  import org.apache.bookkeeper.conf.ClientConfiguration;
  import org.apache.bookkeeper.meta.HierarchicalLedgerManagerFactory;
  import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
  import org.junit.Assert;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Tests concurrent attempts to open and recovery a ledger with V2 protocol.
   */
  public class ConcurrentV2RecoveryTest extends BookKeeperClusterTestCase  {
      private static final Logger LOG = LoggerFactory.getLogger(ConcurrentV2RecoveryTest.class);
      private final DigestType digestType;
  
      public ConcurrentV2RecoveryTest() {
          super(4);
          this.digestType = DigestType.CRC32;
      }
  
      @Test
      public void testConcurrentOpen() throws Exception {
          ClientConfiguration conf = new ClientConfiguration();
          conf.setMetadataServiceUri(zkUtil.getMetadataServiceUri())
              .setNumChannelsPerBookie(16)
              .setUseV2WireProtocol(true)
              .setZkTimeout(20000)
              .setAddEntryTimeout(30)
              .setReadEntryTimeout(30)
              .setSpeculativeReadTimeout(0)
              .setThrottleValue(0)
              .setLedgerManagerFactoryClassName(HierarchicalLedgerManagerFactory.class.getName());
  
          BookKeeper bkc = new BookKeeper(conf);
  
          for (int j = 0; j < 10; j++) {
              LedgerHandle lh = bkc.createLedger(DigestType.CRC32, "testPasswd".getBytes());
              lh.addEntry("foobar".getBytes());
  
              long ledgerId = lh.getId();
              final long finalLedgerId = ledgerId;
              ExecutorService executor = Executors.newFixedThreadPool(10);
              List<Future<?>> futures = new ArrayList<>();
              CountDownLatch latch = new CountDownLatch(1);
              for (int i = 0; i < 5; i++) {
                  final CompletableFuture<LedgerHandle> future = new CompletableFuture<>();
                  executor.submit(() -> {
                              latch.await();
  
                              bkc.asyncOpenLedger(finalLedgerId,
                                                  DigestType.CRC32, "testPasswd".getBytes(),
                                                  (rc, handle, ctx) -> {
                                                      if (rc != BKException.Code.OK) {
                                                          future.completeExceptionally(BKException.create(rc));
                                                      } else {
                                                          future.complete(handle);
                                                      }
                                                  }, null);
                              return future;
                          });
                  futures.add(future);
              }
  
              latch.countDown();
              for (Future<?> f : futures) {
                  try {
                      f.get(10, TimeUnit.SECONDS);
                  } catch (ExecutionException ee) {
                      // also fine, recovery can currently fail because of metadata conflicts.
                      // We should fix this at some point by making the metadata immutable,
                      // and restarting the entire operation
                      Assert.assertEquals(ee.getCause().getClass(), BKException.BKLedgerRecoveryException.class);
                  }
              }
          }
          bkc.close();
      }
  }
  