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.repair;
  
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Objects;
  import java.util.UUID;
  
  import org.apache.commons.lang3.ArrayUtils;
  
  import org.apache.cassandra.db.TypeSizes;
  import org.apache.cassandra.dht.AbstractBounds;
  import org.apache.cassandra.dht.IPartitioner;
  import org.apache.cassandra.dht.Range;
  import org.apache.cassandra.dht.Token;
  import org.apache.cassandra.io.IVersionedSerializer;
  import org.apache.cassandra.io.util.DataInputPlus;
  import org.apache.cassandra.io.util.DataOutputPlus;
  import org.apache.cassandra.net.MessagingService;
  import org.apache.cassandra.schema.Schema;
  import org.apache.cassandra.schema.TableMetadata;
  import org.apache.cassandra.streaming.PreviewKind;
  import org.apache.cassandra.utils.TimeUUID;
  
  import static org.apache.cassandra.utils.ByteBufferUtil.bytes;
  import static org.apache.cassandra.utils.ByteBufferUtil.getArray;
  
  /**
   * RepairJobDesc is used from various repair processes to distinguish one RepairJob to another.
   *
   * @since 2.0
   */
  public class RepairJobDesc
  {
      public static final IVersionedSerializer<RepairJobDesc> serializer = new RepairJobDescSerializer();
  
      public final TimeUUID parentSessionId;
      /** RepairSession id */
      public final TimeUUID sessionId;
      public final String keyspace;
      public final String columnFamily;
      /** repairing range  */
      public final Collection<Range<Token>> ranges;
  
      public RepairJobDesc(TimeUUID parentSessionId, TimeUUID sessionId, String keyspace, String columnFamily, Collection<Range<Token>> ranges)
      {
          this.parentSessionId = parentSessionId;
          this.sessionId = sessionId;
          this.keyspace = keyspace;
          this.columnFamily = columnFamily;
          this.ranges = ranges;
      }
  
      public UUID determanisticId()
      {
          byte[] bytes = getArray(bytes(parentSessionId));
          bytes = ArrayUtils.addAll(bytes, getArray(bytes(sessionId)));
          bytes = ArrayUtils.addAll(bytes, keyspace.getBytes(StandardCharsets.UTF_8));
          bytes = ArrayUtils.addAll(bytes, columnFamily.getBytes(StandardCharsets.UTF_8));
          bytes = ArrayUtils.addAll(bytes, ranges.toString().getBytes(StandardCharsets.UTF_8));
          return UUID.nameUUIDFromBytes(bytes);
      }
  
      public IPartitioner partitioner()
      {
          return partitioner(this.keyspace, this.columnFamily);
      }
  
      public static IPartitioner partitioner(String keyspace, String columnFamily)
      {
          TableMetadata tm = Schema.instance.getTableMetadata(keyspace, columnFamily);
          return tm != null ? tm.partitioner : IPartitioner.global();
      }
  
      @Override
      public String toString()
      {
          return "[repair #" + sessionId + " on " + keyspace + "/" + columnFamily + ", " + ranges + "]";
      }
  
      public String toString(PreviewKind previewKind)
      {
          return '[' + previewKind.logPrefix() + " #" + sessionId + " on " + keyspace + "/" + columnFamily + ", " + ranges + "]";
      }
  
      @Override
      public boolean equals(Object o)
      {
          if (this == o) return true;
          if (o == null || getClass() != o.getClass()) return false;
  
          RepairJobDesc that = (RepairJobDesc) o;
  
          if (!Objects.equals(parentSessionId, that.parentSessionId)) return false;
          if (!sessionId.equals(that.sessionId)) return false;
          if (!keyspace.equals(that.keyspace)) return false;
          if (!columnFamily.equals(that.columnFamily)) return false;
          if (ranges != null ? that.ranges == null || (ranges.size() != that.ranges.size()) || (ranges.size() == that.ranges.size() && !ranges.containsAll(that.ranges)) : that.ranges != null) return false;
  
          return true;
      }
  
      @Override
      public int hashCode()
      {
          return Objects.hash(parentSessionId, sessionId, keyspace, columnFamily, ranges);
      }
  
      private static class RepairJobDescSerializer implements IVersionedSerializer<RepairJobDesc>
      {
          public void serialize(RepairJobDesc desc, DataOutputPlus out, int version) throws IOException
          {
              out.writeBoolean(desc.parentSessionId != null);
              if (desc.parentSessionId != null)
                  desc.parentSessionId.serialize(out);
  
              desc.sessionId.serialize(out);
              out.writeUTF(desc.keyspace);
              out.writeUTF(desc.columnFamily);
              out.writeInt(desc.ranges.size());
              for (Range<Token> rt : desc.ranges)
                  AbstractBounds.tokenSerializer.serialize(rt, out, version);
          }
  
          public RepairJobDesc deserialize(DataInputPlus in, int version) throws IOException
          {
              TimeUUID parentSessionId = null;
              if (in.readBoolean())
                  parentSessionId = TimeUUID.deserialize(in);
              TimeUUID sessionId = TimeUUID.deserialize(in);
              String keyspace = in.readUTF();
              String columnFamily = in.readUTF();
  
              IPartitioner partitioner = version >= MessagingService.VERSION_51
                                         ? partitioner(keyspace, columnFamily)
                                         : IPartitioner.global();
  
              int nRanges = in.readInt();
              Collection<Range<Token>> ranges = new ArrayList<>(nRanges);
              Range<Token> range;
              for (int i = 0; i < nRanges; i++)
              {
                  range = (Range<Token>) AbstractBounds.tokenSerializer.deserialize(in, partitioner, version);
                  ranges.add(range);
              }
  
              return new RepairJobDesc(parentSessionId, sessionId, keyspace, columnFamily, ranges);
          }
  
          public long serializedSize(RepairJobDesc desc, int version)
          {
              int size = TypeSizes.sizeof(desc.parentSessionId != null);
              if (desc.parentSessionId != null)
                  size += TimeUUID.sizeInBytes();
              size += TimeUUID.sizeInBytes();
              size += TypeSizes.sizeof(desc.keyspace);
              size += TypeSizes.sizeof(desc.columnFamily);
              size += TypeSizes.sizeof(desc.ranges.size());
              for (Range<Token> rt : desc.ranges)
              {
                  size += AbstractBounds.tokenSerializer.serializedSize(rt, version);
              }
              return size;
          }
  
      }
  }
  