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.index.accord;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.function.Consumer;
  
  import javax.annotation.Nullable;
  
  import accord.local.MaxDecidedRX;
  import accord.primitives.Timestamp;
  import accord.primitives.TxnId;
  import org.apache.cassandra.io.FSReadError;
  import org.apache.cassandra.io.sstable.format.SSTableReader;
  import org.apache.cassandra.io.util.File;
  import org.apache.cassandra.schema.TableId;
  import org.apache.cassandra.utils.ByteArrayUtil;
  
  import static org.apache.cassandra.index.accord.IndexDescriptor.IndexComponent.CINTIA_SORTED_LIST;
  
  public class RouteSSTableManager implements SSTableManager
  {
      private final Map<SSTableReader, SSTableIndex> sstables = new HashMap<>();
  
      @Override
      public synchronized void onSSTableChanged(Collection<SSTableReader> removed, Iterable<SSTableReader> added)
      {
          //TODO (performance): most added tables will have 0 segmenets, so exclude those from search
          removed.forEach(s -> {
              SSTableIndex index = sstables.remove(s);
              if (index != null)
              {
                  index.close();
                  index.id.deleteIndex();
              }
          });
  
          List<SSTableReader> notComplete = null;
          for (SSTableReader sstable : added)
          {
              IndexDescriptor id = IndexDescriptor.create(sstable);
              if (!id.isIndexBuildComplete())
              {
                  if (notComplete == null) notComplete = new ArrayList<>();
                  notComplete.add(sstable);
                  continue;
              }
              try
              {
                  sstables.put(sstable, SSTableIndex.create(id));
              }
              catch (IOException e)
              {
                  if (notComplete == null) notComplete = new ArrayList<>();
                  notComplete.add(sstable);
              }
          }
          if (notComplete != null)
              throw new IllegalArgumentException("SStables were added without an index... " + notComplete);
      }
  
      @Override
      public synchronized boolean isIndexComplete(SSTableReader reader)
      {
          return sstables.containsKey(reader);
      }
  
      @Override
      public synchronized void search(int storeId, TableId tableId,
                                      byte[] start, byte[] end,
                                      TxnId minTxnId, Timestamp maxTxnId, @Nullable MaxDecidedRX.DecidedRX decidedRX,
                                      Consumer<ByteBuffer> onMatch)
      {
          Key group = new Key(storeId, tableId);
          for (SSTableIndex index : sstables.values())
          {
              try
              {
                  index.search(group, start, end, minTxnId, maxTxnId, decidedRX, onMatch);
              }
              catch (Throwable t)
              {
                  File file = index.id.fileFor(CINTIA_SORTED_LIST);
                  throw new FSReadError("Failed to search range index " + file + " for (" + ByteArrayUtil.bytesToHex(start) + "..." + ByteArrayUtil.bytesToHex(end) + "]", t, file);
              }
          }
      }
  
      @Override
      public synchronized void search(int storeId, TableId tableId, byte[] key, TxnId minTxnId, Timestamp maxTxnId, @Nullable MaxDecidedRX.DecidedRX decidedRX, Consumer<ByteBuffer> onMatch)
      {
          Key group = new Key(storeId, tableId);
          for (SSTableIndex index : sstables.values())
              index.search(group, key, minTxnId, maxTxnId, decidedRX, onMatch);
      }
  }
  