cassandra-trunk/test/unit/org/apache/cassandra/metrics/HintedHandOffMetricsTest.java
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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);
    }
}
