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.virtual;
  
  import java.time.Instant;
  import java.util.Date;
  
  import org.apache.cassandra.db.marshal.BooleanType;
  import org.apache.cassandra.db.marshal.LongType;
  import org.apache.cassandra.db.marshal.TimestampType;
  import org.apache.cassandra.db.marshal.UTF8Type;
  import org.apache.cassandra.dht.LocalPartitioner;
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.service.snapshot.SnapshotManager;
  import org.apache.cassandra.service.snapshot.TableSnapshot;
  
  public class SnapshotsTable extends AbstractVirtualTable
  {
      private static final String NAME = "name";
      private static final String KEYSPACE_NAME = "keyspace_name";
      private static final String TABLE_NAME = "table_name";
      private static final String TRUE_SIZE = "true_size";
      private static final String SIZE_ON_DISK = "size_on_disk";
      private static final String CREATED_AT = "created_at";
      private static final String EXPIRES_AT = "expires_at";
      private static final String EPHEMERAL = "ephemeral";
  
      SnapshotsTable(String keyspace)
      {
          super(TableMetadata.builder(keyspace, "snapshots")
                             .comment("available snapshots")
                             .kind(TableMetadata.Kind.VIRTUAL)
                             .partitioner(new LocalPartitioner(UTF8Type.instance))
                             .addPartitionKeyColumn(NAME, UTF8Type.instance)
                             .addClusteringColumn(KEYSPACE_NAME, UTF8Type.instance)
                             .addClusteringColumn(TABLE_NAME, UTF8Type.instance)
                             .addRegularColumn(TRUE_SIZE, LongType.instance)
                             .addRegularColumn(SIZE_ON_DISK, LongType.instance)
                             .addRegularColumn(CREATED_AT, TimestampType.instance)
                             .addRegularColumn(EXPIRES_AT, TimestampType.instance)
                             .addRegularColumn(EPHEMERAL, BooleanType.instance)
                             .build());
      }
  
      @Override
      public DataSet data()
      {
          SimpleDataSet result = new SimpleDataSet(metadata());
  
          for (TableSnapshot tableSnapshot : SnapshotManager.instance.getSnapshots(false, true))
          {
              Instant snapshotCreatedAt = tableSnapshot.getCreatedAt();
              Date createdAt = snapshotCreatedAt != null ? new Date(snapshotCreatedAt.toEpochMilli()) : null;
  
              SimpleDataSet row = result.row(tableSnapshot.getTag(),
                                             tableSnapshot.getKeyspaceName(),
                                             tableSnapshot.getTableName())
                                        .column(TRUE_SIZE, tableSnapshot.computeTrueSizeBytes())
                                        .column(SIZE_ON_DISK, tableSnapshot.computeSizeOnDiskBytes())
                                        .column(CREATED_AT, createdAt);
  
              if (tableSnapshot.isExpiring())
                  row.column(EXPIRES_AT, new Date(tableSnapshot.getExpiresAt().toEpochMilli()));
  
              row.column(EPHEMERAL, tableSnapshot.isEphemeral());
          }
  
          return result;
      }
  }
  