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.io.sstable;
  
  import java.util.Collection;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.cassandra.db.lifecycle.ILifecycleTransaction;
  import org.apache.cassandra.db.lifecycle.StreamingLifecycleTransaction;
  import org.apache.cassandra.db.rows.UnfilteredRowIterator;
  import org.apache.cassandra.io.sstable.format.SSTableReader;
  import org.apache.cassandra.schema.TableId;
  import org.apache.cassandra.utils.Throwables;
  
  public class SSTableTxnSingleStreamWriter implements SSTableMultiWriter
  {
      private static final Logger logger = LoggerFactory.getLogger(SSTableTxnSingleStreamWriter.class);
  
      private final ILifecycleTransaction txn;
      private final SSTableMultiWriter writer;
      private boolean complete = false;
  
      public SSTableTxnSingleStreamWriter(ILifecycleTransaction txn, SSTableMultiWriter writer)
      {
          this.txn = txn;
          this.writer = writer;
      }
  
      @Override
      public void append(UnfilteredRowIterator partition)
      {
          writer.append(partition);
      }
  
      public synchronized Collection<SSTableReader> transferOwnershipTo(StreamingLifecycleTransaction globalTxn)
      {
          failIfComplete();
          writer.setOpenResult(true);
          writer.prepareToCommit();
          txn.prepareToCommit();
          globalTxn.takeOwnership(txn);
          Throwables.maybeFail(writer.commit(txn.commit(null)));
          complete = true;
          return writer.finished();
      }
  
      @Override
      public synchronized Throwable abort(Throwable accumulate)
      {
          if (complete)
          {
              logger.debug("Already completed writer for '{}'. Nothing to abort.", getFilename());
              return accumulate;
          }
  
          complete = true;
          return txn.abort(writer.abort(accumulate));
      }
  
      @Override
      public synchronized void close()
      {
          complete = true;
          writer.close();
      }
  
      private void failIfComplete()
      {
          if (complete)
              throw new IllegalStateException("Writer "+getFilename()+" has already completed");
      }
  
      @Override
      public String getFilename()
      {
          return writer.getFilename();
      }
  
      @Override
      public long getBytesWritten()
      {
          return writer.getBytesWritten();
      }
  
      @Override
      public long getOnDiskBytesWritten()
      {
          return writer.getOnDiskBytesWritten();
      }
  
      @Override
      public TableId getTableId()
      {
          return writer.getTableId();
      }
  
      @Override
      public Collection<SSTableReader> finish(boolean openResult)
      {
          throw new UnsupportedOperationException("SSTableTxnSingleStreamWriter should be finished via transferOwnershipTo");
      }
  
      @Override
      public Collection<SSTableReader> finished()
      {
          throw new UnsupportedOperationException("SSTableTxnSingleStreamWriter should be finished via transferOwnershipTo");
      }
  
      @Override
      public SSTableMultiWriter setOpenResult(boolean openResult)
      {
          throw new UnsupportedOperationException("SSTableTxnSingleStreamWriter should be finished via transferOwnershipTo");
      }
  
      @Override
      public void prepareToCommit()
      {
          throw new UnsupportedOperationException("SSTableTxnSingleStreamWriter should be finished via transferOwnershipTo");
      }
  
      @Override
      public Throwable commit(Throwable accumulate)
      {
          throw new UnsupportedOperationException("SSTableTxnSingleStreamWriter should be finished via transferOwnershipTo");
      }
  
  }
  