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.consumer.internals.events;
  
  import java.util.concurrent.CompletableFuture;
  
  /**
   * Background event with a result in the form of a future, that can be retrieved within a
   * timeout based on completion.
   *
   * @param <T>
   */
  public abstract class CompletableBackgroundEvent<T> extends BackgroundEvent implements CompletableEvent<T> {
  
      private final CompletableFuture<T> future;
      private final long deadlineMs;
  
      /**
       * <em>Note</em>: the {@code deadlineMs} is the future time of expiration, <em>not</em> a timeout.
       */
      protected CompletableBackgroundEvent(final Type type, final long deadlineMs) {
          super(type);
          this.future = new CompletableFuture<>();
          this.deadlineMs = deadlineMs;
      }
  
      @Override
      public CompletableFuture<T> future() {
          return future;
      }
  
      @Override
      public long deadlineMs() {
          return deadlineMs;
      }
  
      @Override
      protected String toStringBase() {
          return super.toStringBase() + ", future=" + future + ", deadlineMs=" + deadlineMs;
      }
  }
  