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.sidecar.modules;
  
  import org.apache.cassandra.sidecar.common.server.CQLSessionProvider;
  import org.apache.cassandra.sidecar.config.SidecarConfiguration;
  import org.apache.cassandra.sidecar.coordination.ElectorateMembership;
  import org.apache.cassandra.sidecar.coordination.MostReplicatedKeyspaceTokenZeroElectorateMembership;
  import org.apache.cassandra.sidecar.coordination.SidecarInternalTokenZeroElectorateMembership;
  import org.apache.cassandra.sidecar.exceptions.ConfigurationException;
  import org.apache.cassandra.sidecar.utils.InstanceMetadataFetcher;
  
  /**
   * Factory class to initialize the {@link org.apache.cassandra.sidecar.coordination.ElectorateMembership} instance
   * based on the configured strategy
   */
  public class ElectorateMembershipFactory
  {
      /**
       * Creates the {@link ElectorateMembership} based on the strategy configuration
       *
       * @param fetcher         the interface to retrieve instance metadata
       * @param sessionProvider the provider for the CQL session
       * @param config          the configuration for running Sidecar
       * @return the created {@link ElectorateMembership} instance
       * @throws ConfigurationException when an invalid strategy is used
       */
      public ElectorateMembership create(InstanceMetadataFetcher fetcher,
                                         CQLSessionProvider sessionProvider,
                                         SidecarConfiguration config)
      {
          String strategy = config.serviceConfiguration()
                                  .coordinationConfiguration()
                                  .clusterLeaseClaimConfiguration()
                                  .electorateMembershipStrategy();
          switch (strategy)
          {
              case "MostReplicatedKeyspaceTokenZeroElectorateMembership":
                  return new MostReplicatedKeyspaceTokenZeroElectorateMembership(fetcher, sessionProvider, config);
              case "SidecarInternalTokenZeroElectorateMembership":
                  return new SidecarInternalTokenZeroElectorateMembership(fetcher, config);
              default:
                  throw new ConfigurationException("Invalid electorate membership strategy value '" + strategy + "'");
          }
      }
  }
  