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   * Licensed to the Apache Software Foundation (ASF) under one
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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   * 
   *   http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing,
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  package org.apache.cassandra.metrics;
  
  import java.util.Map;
  import java.util.UUID;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import com.google.common.collect.Iterators;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.cql3.UntypedResultSet;
  import org.apache.cassandra.db.SystemKeyspace;
  import org.apache.cassandra.db.commitlog.CommitLog;
  import org.apache.cassandra.db.marshal.Int32Type;
  import org.apache.cassandra.db.marshal.UUIDType;
  import org.apache.cassandra.hints.HintsService;
  import org.apache.cassandra.locator.InetAddressAndPort;
  
  import static org.junit.Assert.assertEquals;
  import static org.apache.cassandra.cql3.QueryProcessor.executeInternal;
  
  public class HintedHandOffMetricsTest
  {
      @BeforeClass
      public static void initDD()
      {
          DatabaseDescriptor.daemonInitialization();
          CommitLog.instance.start();
      }
  
      @Test
      public void testHintsMetrics() throws Exception
      {
          DatabaseDescriptor.getHintsDirectory().tryCreateDirectories();
  
          for (int i = 0; i < 99; i++)
              HintsService.instance.metrics.incrPastWindow(InetAddressAndPort.getLocalHost());
          HintsService.instance.metrics.log();
  
          UntypedResultSet rows = executeInternal("SELECT hints_dropped FROM system." + SystemKeyspace.PEER_EVENTS_V2);
          Map<UUID, Integer> returned = rows.one().getMap("hints_dropped", UUIDType.instance, Int32Type.instance);
          assertEquals(Iterators.getLast(returned.values().iterator()).intValue(), 99);
  
          rows = executeInternal("SELECT hints_dropped FROM system." + SystemKeyspace.LEGACY_PEER_EVENTS);
          returned = rows.one().getMap("hints_dropped", UUIDType.instance, Int32Type.instance);
          assertEquals(Iterators.getLast(returned.values().iterator()).intValue(), 99);
      }
  }
  