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 com.datastax.oss.driver.internal.core.session.throttling;
  
  import com.datastax.oss.driver.api.core.RequestThrottlingException;
  import com.datastax.oss.driver.api.core.session.throttling.Throttled;
  import com.datastax.oss.driver.shaded.guava.common.util.concurrent.Uninterruptibles;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import java.util.concurrent.CompletableFuture;
  import java.util.concurrent.CompletionStage;
  import java.util.concurrent.CountDownLatch;
  
  class MockThrottled implements Throttled {
    final CompletionStage<Void> started = new CompletableFuture<>();
    final CompletionStage<Boolean> ended = new CompletableFuture<>();
    final CountDownLatch canRelease;
  
    public MockThrottled() {
      this(new CountDownLatch(0));
    }
  
    /*
     * The releaseLatch can be provided to add some delay before the
     * task readiness/fail callbacks complete. This can be used, eg, to
     * imitate a slow callback.
     */
    public MockThrottled(CountDownLatch releaseLatch) {
      this.canRelease = releaseLatch;
    }
  
    @Override
    public void onThrottleReady(boolean wasDelayed) {
      started.toCompletableFuture().complete(null);
      awaitRelease();
      ended.toCompletableFuture().complete(wasDelayed);
    }
  
    @Override
    public void onThrottleFailure(@NonNull RequestThrottlingException error) {
      started.toCompletableFuture().complete(null);
      awaitRelease();
      ended.toCompletableFuture().completeExceptionally(error);
    }
  
    private void awaitRelease() {
      Uninterruptibles.awaitUninterruptibly(canRelease);
    }
  }
  