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 org.apache.cassandra.config.Config.PaxosVariant;
  import org.apache.cassandra.distributed.api.IInvokableInstance;
  import org.apache.cassandra.distributed.api.IIsolatedExecutor;
  import org.apache.cassandra.service.paxos.Paxos;
  import org.apache.cassandra.simulator.Action;
  import org.apache.cassandra.simulator.ActionList;
  
  import static org.apache.cassandra.simulator.Action.Modifiers.NONE;
  import static org.apache.cassandra.simulator.Action.Modifiers.RELIABLE;
  import static org.apache.cassandra.utils.LazyToString.lazy;
  
  class OnInstanceSetPaxosVariant extends Action
  {
      final IInvokableInstance instance;
      final int on;
      final PaxosVariant newVariant;
  
      OnInstanceSetPaxosVariant(ClusterActions actions, int on, PaxosVariant newVariant)
      {
          super(lazy(() -> "Set Paxos Variant to " + newVariant + " on node" + on), RELIABLE, NONE);
          this.instance = actions.cluster.get(on);
          this.on = on;
          this.newVariant = newVariant;
      }
  
      protected ActionList performSimple()
      {
          instance.unsafeRunOnThisThread(invokableSetVariant(newVariant));
          return ActionList.empty();
      }
  
      static IIsolatedExecutor.SerializableRunnable invokableSetVariant(PaxosVariant to)
      {
          return () -> Paxos.setPaxosVariant(to);
      }
  }
  