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.distributedlog;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  import static org.junit.Assert.fail;
  
  import java.io.IOException;
  import java.net.URI;
  import java.nio.charset.StandardCharsets;
  import java.util.HashSet;
  import java.util.Set;
  import org.apache.bookkeeper.client.BookKeeperAdmin;
  import org.apache.distributedlog.api.AsyncLogWriter;
  import org.apache.distributedlog.api.DistributedLogManager;
  import org.apache.distributedlog.api.LogWriter;
  import org.apache.distributedlog.api.namespace.NamespaceBuilder;
  import org.apache.distributedlog.bk.LedgerAllocator;
  import org.apache.distributedlog.bk.LedgerAllocatorPool;
  import org.apache.distributedlog.impl.BKNamespaceDriver;
  import org.apache.distributedlog.util.FailpointUtils;
  import org.apache.distributedlog.util.Utils;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TestName;
  
  
  
  /**
   * Test {@link BKLogWriteHandler}.
   */
  public class TestBKLogWriteHandler extends TestDistributedLogBase {
  
      @Rule
      public TestName runtime = new TestName();
  
      /**
       * Testcase: when write handler encounters exceptions on starting log segment
       * it should abort the transaction and return the ledger to the pool.
       */
      @Test(timeout = 60000)
      public void testAbortTransactionOnStartLogSegment() throws Exception {
          URI uri = createDLMURI("/" + runtime.getMethodName());
          ensureURICreated(zkc, uri);
  
          DistributedLogConfiguration confLocal = new DistributedLogConfiguration();
          confLocal.addConfiguration(conf);
          confLocal.setOutputBufferSize(0);
          confLocal.setEnableLedgerAllocatorPool(true);
          confLocal.setLedgerAllocatorPoolCoreSize(1);
          confLocal.setLedgerAllocatorPoolName("test-allocator-pool");
  
          BKDistributedLogNamespace namespace = (BKDistributedLogNamespace)
                  NamespaceBuilder.newBuilder()
                          .conf(confLocal)
                          .uri(uri)
                          .build();
          DistributedLogManager dlm = namespace.openLog("test-stream");
          FailpointUtils.setFailpoint(FailpointUtils.FailPointName.FP_StartLogSegmentOnAssignLogSegmentSequenceNumber,
                  FailpointUtils.FailPointActions.FailPointAction_Throw);
          try {
              AsyncLogWriter writer =  Utils.ioResult(dlm.openAsyncLogWriter());
              Utils.ioResult(writer.write(DLMTestUtil.getLogRecordInstance(1L)));
              fail("Should fail opening the writer");
          } catch (IOException ioe) {
              // expected
          } finally {
              FailpointUtils.removeFailpoint(
                      FailpointUtils.FailPointName.FP_StartLogSegmentOnAssignLogSegmentSequenceNumber);
          }
  
          LedgerAllocator allocator = ((BKNamespaceDriver) namespace.getNamespaceDriver())
                  .getLedgerAllocator();
          assertTrue(allocator instanceof LedgerAllocatorPool);
          LedgerAllocatorPool allocatorPool = (LedgerAllocatorPool) allocator;
          assertEquals(0, allocatorPool.obtainMapSize());
  
          AsyncLogWriter writer = Utils.ioResult(dlm.openAsyncLogWriter());
          writer.write(DLMTestUtil.getLogRecordInstance(1L));
          Utils.close(writer);
      }
  
      @Test
      public void testLedgerNumber() throws Exception {
          URI uri = createDLMURI("/" + runtime.getMethodName());
          ensureURICreated(zkc, uri);
  
          DistributedLogConfiguration confLocal = new DistributedLogConfiguration();
          confLocal.addConfiguration(conf);
          confLocal.setOutputBufferSize(0);
  
          BKDistributedLogNamespace namespace = (BKDistributedLogNamespace)
              NamespaceBuilder.newBuilder()
                  .conf(confLocal)
                  .uri(uri)
                  .build();
          DistributedLogManager dlm = namespace.openLog("test-log");
          BookKeeperAdmin admin = new BookKeeperAdmin(zkServers);
  
          Set<Long> s1 = getLedgers(admin);
          LOG.info("Ledgers after init: " + s1);
  
          LogWriter writer = dlm.openLogWriter();
          writer.write(new LogRecord(1, "test-data".getBytes(StandardCharsets.UTF_8)));
          writer.close();
  
          Set<Long> s2 = getLedgers(admin);
          LOG.info("Ledgers after write: " + s2);
          dlm.delete();
          assertEquals(1, s2.size() - s1.size()); // exact 1 ledger created only
  
          Set<Long> s3 = getLedgers(admin);
          LOG.info("Ledgers after delete: " + s3);
  
          assertEquals(s1.size(), s3.size());
  
      }
  
      // Get all ledgers from BK admin
      private Set<Long> getLedgers(BookKeeperAdmin bkAdmin) throws IOException {
          Set<Long> res = new HashSet<>();
          bkAdmin.listLedgers().forEach(res::add);
          return res;
      }
  
  }
  