package org.eclipse.aether.named.hazelcast;
   
   /*
    * 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.
   */
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.UUID;
  import java.util.stream.IntStream;
  
  import com.hazelcast.client.HazelcastClient;
  import com.hazelcast.client.config.ClientConfig;
  import com.hazelcast.config.Config;
  import com.hazelcast.core.Hazelcast;
  import com.hazelcast.core.HazelcastInstance;
  
  /**
   * Hazelcast test utilities.
   */
  public final class HazelcastClientUtils
  {
      private final List<HazelcastInstance> servers = new ArrayList<>();
  
      /**
       * Creates similar but still randomized name.
       */
      public String clusterName( Class<?> klazz )
      {
          return String.format( "%s-%s", klazz.getSimpleName(), UUID.randomUUID() );
      }
  
      /**
       * Creates single Hazelcast client instance.
       */
      public synchronized HazelcastInstance createClient( String clusterName )
      {
          ClientConfig config = ClientConfig.load();
          config.setClusterName( clusterName );
          return HazelcastClient.newHazelcastClient( config );
      }
  
      /**
       * Creates single Hazelcast member instance.
       */
      public synchronized HazelcastInstance createMember( String clusterName )
      {
          return createMembers( 1, clusterName ).get( 0 );
      }
  
      /**
       * Creates given count of Hazelcast member instances.
       */
      public synchronized List<HazelcastInstance> createMembers( int memberCount, String clusterName )
      {
          Config config = Config.load();
          config.setClusterName( clusterName );
          ArrayList<HazelcastInstance> result = new ArrayList<>( memberCount );
          IntStream.range( 0, memberCount ).forEach( i -> {
                      config.setInstanceName( "node-" + i );
                      HazelcastInstance instance = Hazelcast.newHazelcastInstance( config );
                      result.add( instance );
                      servers.add( instance );
                  }
          );
          return result;
      }
  
      /**
       * Shuts down the created instances.
       */
      public synchronized void cleanup()
      {
          servers.forEach( HazelcastInstance::shutdown );
          servers.clear();
      }
  }