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.cassandra.db.commitlog;
  
  import java.io.File;
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Random;
  
  import com.google.common.collect.ImmutableMap;
  import org.junit.Assert;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  import org.apache.cassandra.SchemaLoader;
  import org.apache.cassandra.config.Config;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.config.ParameterizedClass;
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.db.Keyspace;
  import org.apache.cassandra.db.Mutation;
  import org.apache.cassandra.db.RowUpdateBuilder;
  import org.apache.cassandra.db.compaction.CompactionManager;
  import org.apache.cassandra.db.marshal.AsciiType;
  import org.apache.cassandra.db.marshal.BytesType;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.apache.cassandra.service.StorageService;
  import org.jboss.byteman.contrib.bmunit.BMRule;
  import org.jboss.byteman.contrib.bmunit.BMUnitRunner;
  
  /**
   * Since this test depends on byteman rules being setup during initialization, you shouldn't add tests to this class
   */
  @RunWith(BMUnitRunner.class)
  public class CommitlogShutdownTest
  {
      private static final String KEYSPACE1 = "CommitLogTest";
      private static final String STANDARD1 = "Standard1";
  
      private final static byte[] entropy = new byte[1024 * 256];
  
      @Test
      @BMRule(name = "Make removing commitlog segments slow",
      targetClass = "CommitLogSegment",
      targetMethod = "discard",
      action = "Thread.sleep(50)")
      public void testShutdownWithPendingTasks() throws Exception
      {
          new Random().nextBytes(entropy);
          DatabaseDescriptor.daemonInitialization();
          DatabaseDescriptor.setCommitLogCompression(new ParameterizedClass("LZ4Compressor", ImmutableMap.of()));
          DatabaseDescriptor.setCommitLogSegmentSize(1);
          DatabaseDescriptor.setCommitLogSync(Config.CommitLogSync.periodic);
          DatabaseDescriptor.setCommitLogSyncPeriod(10 * 1000);
          DatabaseDescriptor.initializeCommitLogDiskAccessMode();
          SchemaLoader.prepareServer();
          SchemaLoader.createKeyspace(KEYSPACE1,
                                      KeyspaceParams.simple(1),
                                      SchemaLoader.standardCFMD(KEYSPACE1, STANDARD1, 0, AsciiType.instance, BytesType.instance));
  
                                      CompactionManager.instance.disableAutoCompaction();
  
          ColumnFamilyStore cfs1 = Keyspace.open(KEYSPACE1).getColumnFamilyStore(STANDARD1);
  
          final Mutation m = new RowUpdateBuilder(cfs1.metadata.get(), 0, "k")
                             .clustering("bytes")
                             .add("val", ByteBuffer.wrap(entropy))
                             .build();
  
          // force creating several commitlog files
          for (int i = 0; i < 10; i++)
          {
              m.apply();
          }
  
          StorageService.instance.drain();
  
          List<CommitLogSegment> segmentsToCheck = new ArrayList<>(CommitLog.instance.segmentManager.getActiveSegments());
          // remove the last, potentially active segment from the check
          if (!segmentsToCheck.isEmpty())
              segmentsToCheck.remove(segmentsToCheck.size() - 1);
  
          for (CommitLogSegment segment : segmentsToCheck)
          {
              Assert.assertFalse("An unused segment is left after drain: " + segment.getName()
                                 + ", dirty tables: " + segment.dirtyString()
                                 + ", total segments: " + CommitLog.instance.segmentManager.getActiveSegments().size()
                                 + ", commit log files: " + Arrays.toString(new File(DatabaseDescriptor.getCommitLogLocation()).listFiles()),
                                 segment.isUnused());
          }
      }
  }
  