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.lifecycle;
  
  import java.util.Collection;
  
  import org.apache.cassandra.db.compaction.OperationType;
  import org.apache.cassandra.io.sstable.format.SSTableReader;
  
  import static org.apache.cassandra.utils.Throwables.maybeFail;
  
  /**
   * Special, restricted LifecycleTransaction for streaming, synchronizes access to the shared transaction
   * and adds a method to take ownership of a "child-transaction".
   *
   * Each incoming file is now its own normal LifecycleTransaction.
   */
  public class StreamingLifecycleTransaction
  {
      private final LifecycleTransaction sharedTxn;
  
      public StreamingLifecycleTransaction()
      {
          this.sharedTxn = LifecycleTransaction.offline(OperationType.STREAM);
      }
  
      public synchronized Throwable commit(Throwable accumulate)
      {
          return sharedTxn.commit(accumulate);
      }
  
      public synchronized void update(Collection<SSTableReader> readers)
      {
          sharedTxn.update(readers, false);
      }
  
      public synchronized void abort()
      {
          maybeFail(sharedTxn.abort(null));
      }
  
      public synchronized void finish()
      {
          sharedTxn.prepareToCommit();
          sharedTxn.commit();
      }
  
      public synchronized void takeOwnership(ILifecycleTransaction txn)
      {
          sharedTxn.takeOwnership(txn);
      }
  }
  