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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 org.apache.cassandra.distributed.test.accord;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  
  import com.google.common.collect.ImmutableSet;
  import org.junit.Test;
  
  import accord.local.Node;
  import org.apache.cassandra.tcm.ClusterMetadata;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.Feature;
  import org.apache.cassandra.distributed.test.TestBaseImpl;
  
  
  import static org.junit.Assert.assertEquals;
  import static org.apache.cassandra.distributed.shared.ClusterUtils.getNodeId;
  
  public class AccordNodetoolTest extends TestBaseImpl
  {
      @Test
      public void testMarkSingleNode() throws Throwable
      {
          try (Cluster cluster = init(builder().withNodes(3).withConfig((config) -> config.with(Feature.NETWORK, Feature.GOSSIP)).start()))
          {
              cluster.get(1).nodetoolResult("accord", "mark_stale", "1").asserts().success();
              cluster.get(1).runOnInstance(() -> assertEquals(ImmutableSet.of(new Node.Id(1)), ClusterMetadata.current().accordStaleReplicas.ids()));
              cluster.get(1).nodetoolResult("accord", "describe").asserts().stdoutContains("Stale Replicas: 1");
  
              // Reject the operation if the target node is already stale:
              cluster.get(1).nodetoolResult("accord", "mark_stale", "1").asserts().failure().errorContains("it already is");
  
              // Reject the operation if marking the node stale brings us below a quorum of non-stale nodes:
              cluster.get(1).nodetoolResult("accord", "mark_stale", "2").asserts().failure().errorContains("that would leave fewer than a quorum");
  
              // Reject the operation if the target node doesn't exist:
              cluster.get(1).nodetoolResult("accord", "mark_stale", "4").asserts().failure().errorContains("not present in the directory");
              
              cluster.get(1).nodetoolResult("accord", "mark_rejoining", "1").asserts().success();
              cluster.get(1).runOnInstance(() -> assertEquals(Collections.emptySet(), ClusterMetadata.current().accordStaleReplicas.ids()));
  
              cluster.get(1).nodetoolResult("accord", "mark_rejoining", "1").asserts().failure().errorContains("it is not stale");
              cluster.get(1).nodetoolResult("accord", "mark_rejoining", "4").asserts().failure().errorContains("not present in the directory");
          }
      }
  
      @Test
      public void testMarkMultipleNodes() throws Throwable
      {
          try (Cluster cluster = init(builder().withNodes(5).withConfig((config) -> config.with(Feature.NETWORK, Feature.GOSSIP)).start()))
          {
              // Reject the operation if marking the node stale brings us below a quorum of non-stale nodes:
              cluster.get(1).nodetoolResult("accord", "mark_stale", "1", "2", "3").asserts().failure().errorContains("that would leave fewer than a quorum");
  
              cluster.get(1).nodetoolResult("accord", "mark_stale", "1", "2").asserts().success();
              cluster.get(1).runOnInstance(() -> assertEquals(ImmutableSet.of(new Node.Id(1), new Node.Id(2)), ClusterMetadata.current().accordStaleReplicas.ids()));
              cluster.get(1).nodetoolResult("accord", "describe").asserts().stdoutContains("Stale Replicas: 1,2");
  
              // Reject the operation if a target node is already stale:
              cluster.get(1).nodetoolResult("accord", "mark_stale", "1", "2").asserts().failure().errorContains("it already is");
  
              // Reject the operation if a target node doesn't exist:
              cluster.get(1).nodetoolResult("accord", "mark_stale", "4", "6").asserts().failure().errorContains("not present in the directory");
  
              Map<Integer, Integer> nodeIdToNode = new HashMap<>();
              for (int i = 1; i <= 5; i++)
                  nodeIdToNode.put(getNodeId(cluster.get(i)).id(), i);
  
              // Remove the second stale node, and ensure the set of stale replicas is updated:
              cluster.get(nodeIdToNode.get(2)).shutdown().get();
              cluster.get(1).nodetoolResult("removenode", "2", "--force").asserts().success();
              cluster.get(1).nodetoolResult("cms", "unregister", "2").asserts().success();
              cluster.get(1).runOnInstance(() -> assertEquals(ImmutableSet.of(new Node.Id(1)), ClusterMetadata.current().accordStaleReplicas.ids()));
  
              cluster.get(1).nodetoolResult("accord", "mark_rejoining", "1", "3").asserts().failure().errorContains("it is not stale");
              cluster.get(1).nodetoolResult("accord", "mark_rejoining", "1", "6").asserts().failure().errorContains("not present in the directory");
              cluster.get(1).runOnInstance(() -> assertEquals(ImmutableSet.of(new Node.Id(1)), ClusterMetadata.current().accordStaleReplicas.ids()));
          }
      }
  }
  