content: /*
   * Copyright [2021-present] [ahoo wang <ahoowang@qq.com> (https://github.com/Ahoo-Wang)].
   * 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 me.ahoo.cosid.mongo.reactive;
  
  import reactor.core.publisher.BaseSubscriber;
  import reactor.core.publisher.SignalType;
  
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  public class BlockingAdapterSubscriber<T> extends BaseSubscriber<T> {
      private final CountDownLatch latch;
  
      private T value;
      private Throwable error;
  
      public BlockingAdapterSubscriber() {
          this.latch = new CountDownLatch(1);
      }
  
      @Override
      protected void hookOnNext(final T value) {
          this.value = value;
      }
  
      @Override
      protected void hookOnError(Throwable throwable) {
          this.error = throwable;
      }
  
      public T getValue() {
          return value;
      }
  
      public T block(final long timeout, final TimeUnit unit) throws InterruptedException, TimeoutException {
          return await(timeout, unit).getValue();
      }
  
      public Throwable getError() {
          return error;
      }
  
      @Override
      protected void hookFinally(final SignalType type) {
          latch.countDown();
      }
  
      public BlockingAdapterSubscriber<T> await(final long timeout, final TimeUnit unit) throws TimeoutException, InterruptedException {
          if (!latch.await(timeout, unit)) {
              throw new TimeoutException("Timeout after " + timeout + " " + unit);
          }
          if (getError() != null) {
              if (getError() instanceof RuntimeException) {
                  throw (RuntimeException) getError();
              }
              throw new RuntimeException(getError());
          }
          return this;
      }
  }
  