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.kafka.clients.admin;
  
  import org.apache.kafka.common.KafkaException;
  import org.apache.kafka.common.KafkaFuture;
  import org.apache.kafka.common.internals.KafkaFutureImpl;
  import org.apache.kafka.common.message.LeaveGroupRequestData.MemberIdentity;
  import org.apache.kafka.common.protocol.Errors;
  
  import java.util.Map;
  import java.util.Set;
  
  /**
   * The result of the {@link Admin#removeMembersFromConsumerGroup(String, RemoveMembersFromConsumerGroupOptions)} call.
   *
   * The API of this class is evolving, see {@link Admin} for details.
   */
  public class RemoveMembersFromConsumerGroupResult {
  
      private final KafkaFuture<Map<MemberIdentity, Errors>> future;
      private final Set<MemberToRemove> memberInfos;
  
      RemoveMembersFromConsumerGroupResult(KafkaFuture<Map<MemberIdentity, Errors>> future,
                                           Set<MemberToRemove> memberInfos) {
          this.future = future;
          this.memberInfos = memberInfos;
      }
  
      /**
       * Returns a future which indicates whether the request was 100% success, i.e. no
       * either top level or member level error.
       * If not, the first member error shall be returned.
       */
      public KafkaFuture<Void> all() {
          final KafkaFutureImpl<Void> result = new KafkaFutureImpl<>();
          this.future.whenComplete((memberErrors, throwable) -> {
              if (throwable != null) {
                  result.completeExceptionally(throwable);
              } else {
                  if (removeAll()) {
                      for (Map.Entry<MemberIdentity, Errors> entry: memberErrors.entrySet()) {
                          Exception exception = entry.getValue().exception();
                          if (exception != null) {
                              Throwable ex = new KafkaException("Encounter exception when trying to remove: "
                                      + entry.getKey(), exception);
                              result.completeExceptionally(ex);
                              return;
                          }
                      }
                  } else {
                      for (MemberToRemove memberToRemove : memberInfos) {
                          if (maybeCompleteExceptionally(memberErrors, memberToRemove.toMemberIdentity(), result)) {
                              return;
                          }
                      }
                  }
                  result.complete(null);
              }
          });
          return result;
      }
  
      /**
       * Returns the selected member future.
       */
      public KafkaFuture<Void> memberResult(MemberToRemove member) {
          if (removeAll()) {
              throw new IllegalArgumentException("The method: memberResult is not applicable in 'removeAll' mode");
          }
          if (!memberInfos.contains(member)) {
              throw new IllegalArgumentException("Member " + member + " was not included in the original request");
          }
  
          final KafkaFutureImpl<Void> result = new KafkaFutureImpl<>();
          this.future.whenComplete((memberErrors, throwable) -> {
              if (throwable != null) {
                  result.completeExceptionally(throwable);
              } else if (!maybeCompleteExceptionally(memberErrors, member.toMemberIdentity(), result)) {
                  result.complete(null);
              }
          });
          return result;
      }
  
      private boolean maybeCompleteExceptionally(Map<MemberIdentity, Errors> memberErrors,
                                                 MemberIdentity member,
                                                 KafkaFutureImpl<Void> result) {
          Throwable exception = KafkaAdminClient.getSubLevelError(memberErrors, member,
              "Member \"" + member + "\" was not included in the removal response");
          if (exception != null) {
              result.completeExceptionally(exception);
              return true;
          } else {
              return false;
          }
      }
  
      private boolean removeAll() {
          return memberInfos.isEmpty();
      }
  }
  