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.simulator.cluster;
  
  import java.util.Arrays;
  
  import org.apache.cassandra.simulator.ActionList;
  import org.apache.cassandra.simulator.Actions;
  import org.apache.cassandra.simulator.cluster.OnInstanceRepair.RepairType;
  
  import static org.apache.cassandra.simulator.Action.Modifiers.NONE;
  import static org.apache.cassandra.simulator.Action.Modifiers.RELIABLE_NO_TIMEOUTS;
  import static org.apache.cassandra.simulator.Action.Modifiers.STRICT;
  import static org.apache.cassandra.simulator.cluster.ClusterReliableQueryAction.schemaChange;
  import static org.apache.cassandra.utils.LazyToString.lazy;
  
  class OnClusterChangeRf extends OnClusterChangeTopology
  {
      final KeyspaceActions actions;
      final long timestamp;
      final int on;
      final boolean increase;
  
      OnClusterChangeRf(KeyspaceActions actions, long timestamp, int on, Topology before, Topology after, boolean increase)
      {
          super(increase ? lazy(() -> "Increase replication factor to " + Arrays.toString(after.rf))
                         : lazy(() -> "Decrease replication factor to " + Arrays.toString(after.rf)),
                actions, STRICT, NONE, before, after, before.primaryKeys);
          this.actions = actions;
          this.timestamp = timestamp;
          this.on = on;
          this.increase = increase;
      }
  
      protected ActionList performSimple()
      {
          before(actions.cluster.get(on));
  
          StringBuilder command = new StringBuilder("ALTER KEYSPACE " + actions.keyspace + " WITH replication = {'class': 'NetworkTopologyStrategy'");
          for (int i = 0; i < after.rf.length; ++i)
              command.append(", '").append(actions.snitch.nameOfDc(i)).append("': ").append(after.rf[i]);
          command.append("};");
  
          return ActionList.of(
              schemaChange("ALTER KEYSPACE " + description(), actions, on, command.toString()),
              new OnClusterFullRepair(actions, after, RepairType.DATA_AND_PAXOS_FULL, false),
              // TODO: cleanup should clear paxos state tables
              Actions.of("Flush and Cleanup", !increase ? () -> actions.flushAndCleanup(after.membersOfRing) : ActionList::empty),
              Quiesce.all(actions).asAction(STRICT, RELIABLE_NO_TIMEOUTS, "Wait for cluster to quiesce")
          );
      }
  }
  