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.IOException;
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.Random;
  
  import org.junit.Assert;
  import org.junit.Assume;
  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.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.io.util.File;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.jboss.byteman.contrib.bmunit.BMRule;
  import org.jboss.byteman.contrib.bmunit.BMUnitRunner;
  
  /**
   * Tests the commitlog to make sure we can replay it - explicitly for the case where we update the chained markers
   * in the commit log segment but do not flush the file to disk.
   */
  @RunWith(BMUnitRunner.class)
  public class CommitLogChainedMarkersTest
  {
      private static final String KEYSPACE1 = "CommitLogTest";
      private static final String STANDARD1 = "CommitLogChainedMarkersTest";
  
      @Test
      @BMRule(name = "force all calls to sync() to not flush to disk",
      targetClass = "CommitLogSegment",
      targetMethod = "sync(boolean)",
      action = "$flush = false")
      public void replayCommitLogWithoutFlushing() throws IOException
      {
          // this method is blend of CommitLogSegmentBackpressureTest & CommitLogReaderTest methods
          DatabaseDescriptor.daemonInitialization();
  
          Assume.assumeTrue("With direct IO used for the commitlog we cannot expect the data are on disk without flushing it",
                            DatabaseDescriptor.getCommitLogWriteDiskAccessMode() != Config.DiskAccessMode.direct);
  
          DatabaseDescriptor.setCommitLogSegmentSize(5);
          DatabaseDescriptor.setCommitLogSync(Config.CommitLogSync.periodic);
          DatabaseDescriptor.setCommitLogSyncPeriod(10000 * 1000);
          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);
  
          byte[] entropy = new byte[1024];
          new Random().nextBytes(entropy);
          final Mutation m = new RowUpdateBuilder(cfs1.metadata.get(), 0, "k")
                             .clustering("bytes")
                             .add("val", ByteBuffer.wrap(entropy))
                             .build();
  
          int samples = 10000;
          for (int i = 0; i < samples; i++)
              CommitLog.instance.add(m);
  
          CommitLog.instance.sync(false);
  
          ArrayList<File> toCheck = CommitLogReaderTest.getCommitLogs();
          CommitLogReader reader = new CommitLogReader();
          CommitLogReaderTest.TestCLRHandler testHandler = new CommitLogReaderTest.TestCLRHandler(cfs1.metadata.get());
          for (File f : toCheck)
              reader.readCommitLogSegment(testHandler, f, CommitLogReader.ALL_MUTATIONS, false);
  
          Assert.assertEquals(samples, testHandler.seenMutationCount());
      }
  }
  