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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.
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  package com.datastax.oss.driver.core;
  
  import static com.datastax.oss.simulacron.common.codec.ConsistencyLevel.ONE;
  import static com.datastax.oss.simulacron.common.stubbing.PrimeDsl.readTimeout;
  import static com.datastax.oss.simulacron.common.stubbing.PrimeDsl.when;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.fail;
  
  import com.datastax.oss.driver.api.core.AllNodesFailedException;
  import com.datastax.oss.driver.api.core.ConsistencyLevel;
  import com.datastax.oss.driver.api.core.CqlSession;
  import com.datastax.oss.driver.api.core.config.DefaultDriverOption;
  import com.datastax.oss.driver.api.core.config.DriverConfigLoader;
  import com.datastax.oss.driver.api.core.context.DriverContext;
  import com.datastax.oss.driver.api.core.metadata.Node;
  import com.datastax.oss.driver.api.core.retry.RetryDecision;
  import com.datastax.oss.driver.api.core.session.Request;
  import com.datastax.oss.driver.api.testinfra.session.SessionUtils;
  import com.datastax.oss.driver.api.testinfra.simulacron.SimulacronRule;
  import com.datastax.oss.driver.categories.ParallelizableTests;
  import com.datastax.oss.driver.internal.core.retry.DefaultRetryPolicy;
  import com.datastax.oss.simulacron.common.cluster.ClusterSpec;
  import edu.umd.cs.findbugs.annotations.NonNull;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map.Entry;
  import org.junit.ClassRule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  @Category(ParallelizableTests.class)
  public class AllNodesFailedIT {
  
    @ClassRule
    public static final SimulacronRule SIMULACRON_RULE =
        new SimulacronRule(ClusterSpec.builder().withNodes(2));
  
    @Test
    public void should_report_multiple_errors_per_node() {
      SIMULACRON_RULE.cluster().prime(when("SELECT foo").then(readTimeout(ONE, 0, 0, false)));
      DriverConfigLoader loader =
          SessionUtils.configLoaderBuilder()
              .withClass(DefaultDriverOption.RETRY_POLICY_CLASS, MultipleRetryPolicy.class)
              .build();
  
      try (CqlSession session =
          (CqlSession)
              SessionUtils.baseBuilder()
                  .addContactEndPoints(SIMULACRON_RULE.getContactPoints())
                  .withConfigLoader(loader)
                  .build()) {
        // when executing a query.
        session.execute("SELECT foo");
        fail("AllNodesFailedException expected");
      } catch (AllNodesFailedException ex) {
        assertThat(ex.getAllErrors()).hasSize(2);
        Iterator<Entry<Node, List<Throwable>>> iterator = ex.getAllErrors().entrySet().iterator();
        // first node should have been tried twice
        Entry<Node, List<Throwable>> node1Errors = iterator.next();
        assertThat(node1Errors.getValue()).hasSize(2);
        // second node should have been tried twice
        Entry<Node, List<Throwable>> node2Errors = iterator.next();
        assertThat(node2Errors.getValue()).hasSize(2);
      }
    }
  
    public static class MultipleRetryPolicy extends DefaultRetryPolicy {
  
      public MultipleRetryPolicy(DriverContext context, String profileName) {
        super(context, profileName);
      }
  
      @Override
      @Deprecated
      public RetryDecision onReadTimeout(
          @NonNull Request request,
          @NonNull ConsistencyLevel cl,
          int blockFor,
          int received,
          boolean dataPresent,
          int retryCount) {
        // retry each node twice
        if (retryCount % 2 == 0) {
          return RetryDecision.RETRY_SAME;
        } else {
          return RetryDecision.RETRY_NEXT;
        }
      }
    }
  }
  