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.service.snapshot;
  
  import java.util.Set;
  import java.util.concurrent.Callable;
  import java.util.function.Predicate;
  
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.db.Keyspace;
  
  public class TrueSnapshotSizeTask implements Callable<Long>
  {
      private final SnapshotManager snapshotManager;
      private final Predicate<TableSnapshot> predicate;
  
      public TrueSnapshotSizeTask(SnapshotManager snapshotManager, Predicate<TableSnapshot> predicate)
      {
          this.snapshotManager = snapshotManager;
          this.predicate = predicate;
      }
  
      @Override
      public Long call()
      {
          long size = 0;
          for (TableSnapshot snapshot : snapshotManager.getSnapshots())
          {
              if (predicate.test(snapshot))
                  try
                  {
                      size += snapshot.computeTrueSizeBytes(getTablesFiles(snapshot.getKeyspaceName(), snapshot.getTableName()));
                  }
                  catch (Throwable ex)
                  {
                      // if any error happens while computing size, we don't include
                      return 0L;
                  }
          }
  
          return size;
      }
  
      private Set<String> getTablesFiles(String keyspaceName, String tableName)
      {
          try
          {
              Keyspace keyspace = Keyspace.getValidKeyspace(keyspaceName);
              ColumnFamilyStore table = keyspace.getColumnFamilyStore(tableName);
  
              return table.getFilesOfCfs();
          }
          catch (IllegalArgumentException ex)
          {
              // keyspace / table not found
              return null;
          }
      }
  
  }
  