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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
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  package org.apache.cassandra.index.sai.metrics;
  
  import org.junit.Test;
  
  import static org.assertj.core.api.Assertions.assertThatThrownBy;
  import static org.junit.Assert.assertEquals;
  
  public class IndexMetricsTest extends AbstractMetricsTest
  {
      private static final String TABLE = "table_name";
      private static final String INDEX = "table_name_index";
  
      private static final String CREATE_TABLE_TEMPLATE = "CREATE TABLE %s." + TABLE + " (ID1 TEXT PRIMARY KEY, v1 INT, v2 TEXT) WITH compaction = " +
                                                          "{'class' : 'SizeTieredCompactionStrategy', 'enabled' : false }";
      private static final String CREATE_INDEX_TEMPLATE = "CREATE CUSTOM INDEX IF NOT EXISTS " + INDEX + " ON %s." + TABLE + "(%s) USING 'StorageAttachedIndex'";
  
      @Test
      public void testSameIndexNameAcrossKeyspaces() throws Throwable
      {
          String keyspace1 = createKeyspace(CREATE_KEYSPACE_TEMPLATE);
          String keyspace2 = createKeyspace(CREATE_KEYSPACE_TEMPLATE);
  
          createTable(String.format(CREATE_TABLE_TEMPLATE, keyspace1));
          createIndex(String.format(CREATE_INDEX_TEMPLATE, keyspace1, "v1"));
  
          createTable(String.format(CREATE_TABLE_TEMPLATE, keyspace2));
          createIndex(String.format(CREATE_INDEX_TEMPLATE, keyspace2, "v1"));
  
          execute("INSERT INTO " + keyspace1 + '.' + TABLE + " (id1, v1, v2) VALUES ('0', 0, '0')");
  
          assertEquals(1L, getMetricValue(objectName("LiveMemtableIndexWriteCount", keyspace1, TABLE, INDEX, "IndexMetrics")));
          assertEquals(0L, getMetricValue(objectName("LiveMemtableIndexWriteCount", keyspace2, TABLE, INDEX, "IndexMetrics")));
  
          execute("INSERT INTO " + keyspace2 + '.' + TABLE + " (id1, v1, v2) VALUES ('0', 0, '0')");
          execute("INSERT INTO " + keyspace2 + '.' + TABLE + " (id1, v1, v2) VALUES ('1', 1, '1')");
  
          assertEquals(1L, getMetricValue(objectName("LiveMemtableIndexWriteCount", keyspace1, TABLE, INDEX, "IndexMetrics")));
          assertEquals(2L, getMetricValue(objectName("LiveMemtableIndexWriteCount", keyspace2, TABLE, INDEX, "IndexMetrics")));
      }
  
      @Test
      public void testMetricRelease() throws Throwable
      {
          String keyspace = createKeyspace(CREATE_KEYSPACE_TEMPLATE);
  
          createTable(String.format(CREATE_TABLE_TEMPLATE, keyspace));
          createIndex(String.format(CREATE_INDEX_TEMPLATE, keyspace, "v1"));
  
          execute("INSERT INTO " + keyspace + '.' + TABLE + " (id1, v1, v2) VALUES ('0', 0, '0')");
          assertEquals(1L, getMetricValue(objectName("LiveMemtableIndexWriteCount", keyspace, TABLE, INDEX, "IndexMetrics")));
  
          dropIndex(String.format("DROP INDEX %s." + INDEX, keyspace));
  
          // once the index is dropped, make sure MBeans are no longer accessible
          assertThatThrownBy(() -> getMetricValue(objectName("LiveMemtableIndexWriteCount", keyspace, TABLE, INDEX, "IndexMetrics")))
                  .hasCauseInstanceOf(javax.management.InstanceNotFoundException.class);
      }
  }
  