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   * 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.core.context;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.fail;
  import static org.awaitility.Awaitility.await;
  
  import com.datastax.oss.driver.api.core.AllNodesFailedException;
  import com.datastax.oss.driver.api.core.CqlSession;
  import com.datastax.oss.driver.api.core.config.DriverConfigLoader;
  import com.datastax.oss.driver.api.testinfra.simulacron.SimulacronRule;
  import com.datastax.oss.driver.categories.ParallelizableTests;
  import com.datastax.oss.driver.internal.core.config.typesafe.DefaultDriverConfigLoader;
  import com.datastax.oss.driver.internal.core.context.DefaultDriverContext;
  import com.datastax.oss.driver.internal.core.context.LifecycleListener;
  import com.datastax.oss.driver.internal.core.session.DefaultSession;
  import com.datastax.oss.driver.internal.core.util.concurrent.CompletableFutures;
  import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableList;
  import com.datastax.oss.simulacron.common.cluster.ClusterSpec;
  import com.datastax.oss.simulacron.server.RejectScope;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import java.util.Collections;
  import java.util.List;
  import java.util.concurrent.TimeUnit;
  import org.junit.ClassRule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  @Category(ParallelizableTests.class)
  public class LifecycleListenerIT {
  
    @ClassRule
    public static final SimulacronRule SIMULACRON_RULE =
        new SimulacronRule(ClusterSpec.builder().withNodes(1));
  
    @Test
    public void should_notify_listener_of_init_and_shutdown() {
      TestLifecycleListener listener = new TestLifecycleListener();
      assertThat(listener.ready).isFalse();
      assertThat(listener.closed).isFalse();
  
      try (CqlSession session = newSession(listener)) {
        await().atMost(1, TimeUnit.SECONDS).until(() -> listener.ready);
        assertThat(listener.closed).isFalse();
      }
      assertThat(listener.ready).isTrue();
      await().atMost(1, TimeUnit.SECONDS).until(() -> listener.closed);
    }
  
    @Test
    public void should_not_notify_listener_when_init_fails() {
      TestLifecycleListener listener = new TestLifecycleListener();
      assertThat(listener.ready).isFalse();
      assertThat(listener.closed).isFalse();
  
      SIMULACRON_RULE.cluster().rejectConnections(0, RejectScope.STOP);
      try (CqlSession session = newSession(listener)) {
        fail("Expected AllNodesFailedException");
      } catch (AllNodesFailedException ignored) {
      } finally {
        SIMULACRON_RULE.cluster().acceptConnections();
      }
      assertThat(listener.ready).isFalse();
      await().atMost(1, TimeUnit.SECONDS).until(() -> listener.closed);
    }
  
    private CqlSession newSession(TestLifecycleListener listener) {
      TestContext context = new TestContext(new DefaultDriverConfigLoader(), listener);
      return CompletableFutures.getUninterruptibly(
          DefaultSession.init(context, SIMULACRON_RULE.getContactPoints(), null));
    }
  
    public static class TestLifecycleListener implements LifecycleListener {
      volatile boolean ready;
      volatile boolean closed;
  
      @Override
      public void onSessionReady() {
        ready = true;
      }
  
      @Override
      public void close() throws Exception {
        closed = true;
      }
    }
  
    public static class TestContext extends DefaultDriverContext {
  
      private final List<LifecycleListener> listeners;
  
      TestContext(DriverConfigLoader configLoader, TestLifecycleListener listener) {
        super(
            configLoader,
            Collections.emptyList(),
            null,
            null,
            null,
            Collections.emptyMap(),
            Collections.emptyMap(),
            null);
        this.listeners = ImmutableList.of(listener);
      }
  
      @NonNull
      @Override
      public List<LifecycleListener> getLifecycleListeners() {
        return listeners;
      }
    }
  }
  