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   * Licensed to the Apache Software Foundation (ASF) under one
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   * 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,
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.tools.nodetool;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.cassandra.schema.CompactionParams;
  import org.apache.cassandra.tools.NodeProbe;
  
  import org.apache.cassandra.tools.nodetool.layout.CassandraUsage;
  import picocli.CommandLine.Parameters;
  import picocli.CommandLine.Command;
  import picocli.CommandLine.Option;
  
  import static org.apache.cassandra.tools.nodetool.CommandUtils.parseOptionalKeyspace;
  import static org.apache.cassandra.tools.nodetool.CommandUtils.parseOptionalTables;
  import static org.apache.cassandra.tools.nodetool.CommandUtils.concatArgs;
  
  @Command(name = "garbagecollect", description = "Remove deleted data from one or more tables")
  public class GarbageCollect extends AbstractCommand
  {
      @CassandraUsage(usage = "[<keyspace> <tables>...]", description = "The keyspace followed by one or many tables")
      private List<String> args = new ArrayList<>();
  
      @Parameters(index = "0", description = "The keyspace followed by one or many tables to garbage collect", arity = "0..1")
      private String keyspace;
  
      @Parameters(index = "1..*", description = "The tables to garbage collect", arity = "0..*")
      private String[] tables;
  
      @Option(paramLabel = "granularity",
              names = { "-g", "--granularity" },
              description = "Granularity of garbage removal. ROW (default) removes deleted partitions and rows, CELL also removes overwritten or deleted cells.")
      private CompactionParams.TombstoneOption tombstoneOption = CompactionParams.TombstoneOption.ROW;
  
      @Option(paramLabel = "jobs",
              names = { "-j", "--jobs" },
              description = "Number of sstables to cleanup simultanously, set to 0 to use all available compaction " +
                            "threads. Defaults to 1 so that collections of newer tables can see the data is deleted " +
                            "and also remove tombstones.")
      private int jobs = 1;
  
      @Override
      public void execute(NodeProbe probe)
      {
          args = concatArgs(keyspace, tables);
  
          List<String> keyspaces = parseOptionalKeyspace(args, probe);
          String[] tableNames = parseOptionalTables(args);
  
          for (String keyspace : keyspaces)
          {
              try
              {
                  probe.garbageCollect(probe.output().out, tombstoneOption.toString(), jobs, keyspace, tableNames);
              } catch (Exception e)
              {
                  throw new RuntimeException("Error occurred during garbage collection", e);
              }
          }
      }
  }
  