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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 org.apache.cassandra.tools.nodetool;
  
  import java.net.InetSocketAddress;
  
  import org.junit.Before;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.auth.AuthTestUtils;
  import org.apache.cassandra.auth.AuthenticatedUser;
  import org.apache.cassandra.auth.IRoleManager;
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.cql3.CQLTester;
  import org.apache.cassandra.tools.ToolRunner;
  
  import static java.lang.String.format;
  import static org.apache.cassandra.auth.AuthKeyspace.CIDR_GROUPS;
  import static org.apache.cassandra.auth.AuthTestUtils.ROLE_A;
  import static org.apache.cassandra.auth.AuthTestUtils.ROLE_B;
  import static org.apache.cassandra.schema.SchemaConstants.AUTH_KEYSPACE_NAME;
  import static org.assertj.core.api.Assertions.assertThat;
  
  public class ReloadCIDRGroupsCacheTest extends CQLTester
  {
      static InetSocketAddress ipAddr;
  
      @BeforeClass
      public static void setup() throws Exception
      {
          CQLTester.requireAuthentication();
  
          IRoleManager roleManager = DatabaseDescriptor.getRoleManager();
          roleManager.createRole(AuthenticatedUser.SYSTEM_USER, ROLE_A, AuthTestUtils.getLoginRoleOptions());
          roleManager.createRole(AuthenticatedUser.SYSTEM_USER, ROLE_B, AuthTestUtils.getLoginRoleOptions());
  
          startJMXServer();
  
          ipAddr = new InetSocketAddress("127.0.0.0", 0);
      }
  
      @Before
      public void before() throws Throwable
      {
          execute(format("insert into %s.%s (cidr_group, cidrs) values('test1', { ('10.11.12.0', 24) })",
                         AUTH_KEYSPACE_NAME, CIDR_GROUPS));
      }
  
      private long getCidrGroupsReadCount()
      {
          return DatabaseDescriptor.getCIDRAuthorizer().getCidrAuthorizerMetrics().cacheReloadCount.getCount();
      }
  
      @Test
      public void testReloadCidrGroupsCache()
      {
          AuthenticatedUser role = new AuthenticatedUser(ROLE_A.getRoleName());
  
          long originalReadsCount = getCidrGroupsReadCount();
  
          // ensure cidr groups cache not reloaded
          role.hasAccessFromIp(ipAddr);
          assertThat(originalReadsCount).isEqualTo(getCidrGroupsReadCount());
  
          // invalidate all, which reloads cidr groups cache
          ToolRunner.ToolResult tool = ToolRunner.invokeNodetool("reloadcidrgroupscache");
          tool.assertOnCleanExit();
          assertThat(tool.getStdout()).contains("Reloaded CIDR groups cache");
  
          // ensure cidr groups cache reloaded
          role.hasAccessFromIp(ipAddr);
          assertThat(originalReadsCount).isLessThan(getCidrGroupsReadCount());
      }
  }
  