content: /*
   * 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.service;
  
  import java.util.Objects;
  import java.util.concurrent.TimeUnit;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.SchemaLoader;
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.exceptions.ConfigurationException;
  import org.apache.cassandra.schema.KeyspaceMetadata;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.apache.cassandra.schema.Schema;
  import org.apache.cassandra.schema.SchemaTestUtil;
  import org.apache.cassandra.schema.TableMetadata;
  
  import static org.apache.cassandra.SchemaLoader.standardCFMD;
  import static org.apache.cassandra.service.CassandraDaemon.SPECULATION_THRESHOLD_UPDATER;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotEquals;
  
  public class OptionalTasksTest
  {
      private static final String KEYSPACE = "OpitonalTasksTest";
      private static final String TABLE = "SpeculationThreshold";
  
      @BeforeClass
      public static void defineSchema() throws ConfigurationException
      {
          SchemaLoader.prepareServer();
          SchemaLoader.createKeyspace(KEYSPACE, KeyspaceParams.simple(1), standardCFMD(KEYSPACE, TABLE));
      }
  
      @Test
      public void shouldIgnoreDroppedKeyspace()
      {
          // Set the initial sampling state...
          TableMetadata metadata = Schema.instance.getTableMetadata(KEYSPACE, TABLE);
          ColumnFamilyStore cfs = Schema.instance.getColumnFamilyStoreInstance(Objects.requireNonNull(metadata).id);
          Objects.requireNonNull(cfs).metric.coordinatorReadLatency.update(100, TimeUnit.NANOSECONDS);
  
          // Remove the Keyspace name to make it invisible to the updater...
          KeyspaceMetadata ksm = Schema.instance.getKeyspaceMetadata(KEYSPACE);
          SchemaTestUtil.dropKeyspaceIfExist(KEYSPACE, true);
  
          try
          {
              long originalValue = cfs.sampleReadLatencyMicros;
  
              // ...and ensure that the speculation threshold updater doesn't run.
              SPECULATION_THRESHOLD_UPDATER.run();
  
              assertEquals(originalValue, cfs.sampleReadLatencyMicros);
          }
          finally
          {
              // Restore the removed Keyspace to put things back the way we found them.
              SchemaTestUtil.addOrUpdateKeyspace(ksm, true);
          }
      }
  
      @Test
      public void shouldUpdateSpeculationThreshold()
      {
          // Set the initial sampling state...
          TableMetadata metadata = Schema.instance.getTableMetadata(KEYSPACE, TABLE);
          ColumnFamilyStore cfs = Schema.instance.getColumnFamilyStoreInstance(Objects.requireNonNull(metadata).id);
          Objects.requireNonNull(cfs).metric.coordinatorReadLatency.update(100, TimeUnit.NANOSECONDS);
  
          long originalValue = cfs.sampleReadLatencyMicros;
  
          // ...and ensure that the speculation threshold updater runs.
          SPECULATION_THRESHOLD_UPDATER.run();
  
          assertNotEquals(originalValue, cfs.sampleReadLatencyMicros);
      }
  }
  