content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * Licensed 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 io.activej.rpc.client.sender;
  
  import io.activej.rpc.client.RpcClientConnectionPool;
  import io.activej.rpc.client.sender.strategy.RpcStrategy;
  
  import java.net.InetSocketAddress;
  import java.util.Collection;
  import java.util.List;
  import java.util.Objects;
  import java.util.Set;
  
  import static java.util.stream.Collectors.toList;
  import static java.util.stream.Collectors.toSet;
  
  public final class Utils {
  
  	public static List<RpcSender> listOfSenders(List<? extends RpcStrategy> strategies, RpcClientConnectionPool pool) {
  		return strategies.stream()
  			.map(strategy -> strategy.createSender(pool))
  			.filter(Objects::nonNull)
  			.collect(toList());
  	}
  
  	public static List<RpcSender> listOfNullableSenders(List<? extends RpcStrategy> strategies, RpcClientConnectionPool pool) {
  		return strategies.stream()
  			.map(strategy -> strategy.createSender(pool))
  			.toList();
  	}
  
  	public static Set<InetSocketAddress> getAddresses(Collection<? extends RpcStrategy> strategies) {
  		return strategies.stream()
  			.map(RpcStrategy::getAddresses)
  			.flatMap(Collection::stream)
  			.collect(toSet());
  	}
  
  }
  