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.paxos;
  
  import java.util.Collection;
  
  import org.apache.cassandra.db.SystemKeyspace;
  import org.apache.cassandra.dht.Range;
  import org.apache.cassandra.dht.Token;
  
  public class TablePaxosRepairHistory
  {
      private final String keyspace;
      private final String table;
      private volatile PaxosRepairHistory history;
  
      private TablePaxosRepairHistory(String keyspace, String table, PaxosRepairHistory history)
      {
          this.keyspace = keyspace;
          this.table = table;
          this.history = history;
      }
  
      public static TablePaxosRepairHistory load(String keyspace, String table)
      {
          return new TablePaxosRepairHistory(keyspace, table, SystemKeyspace.loadPaxosRepairHistory(keyspace, table));
      }
  
      public Ballot getBallotForToken(Token token)
      {
          return history.ballotForToken(token);
      }
  
      private void updatePaxosRepairTable(PaxosRepairHistory update, boolean flush)
      {
          SystemKeyspace.savePaxosRepairHistory(keyspace, table, update, flush);
      }
  
      public synchronized void add(Collection<Range<Token>> ranges, Ballot ballot, boolean flush)
      {
          PaxosRepairHistory update = PaxosRepairHistory.add(history, ranges, ballot);
          updatePaxosRepairTable(update, flush);
          history = update;
      }
  
      public synchronized void merge(PaxosRepairHistory toMerge, boolean flush)
      {
          PaxosRepairHistory update = PaxosRepairHistory.merge(history, toMerge);
          if (!update.equals(history))
              updatePaxosRepairTable(update, flush);
          history = update;
      }
  
      public PaxosRepairHistory getHistory()
      {
          return history;
      }
  
      public PaxosRepairHistory getHistoryForRanges(Collection<Range<Token>> ranges)
      {
          return PaxosRepairHistory.trim(history, ranges);
      }
  }
  