test/unit/org/apache/cassandra/service/RowResolverTest.java

package org.apache.cassandra.service;
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 * 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
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 * Unless required by applicable law or agreed to in writing,
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 * KIND, either express or implied.  See the License for the
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import java.util.Arrays;

import org.junit.BeforeClass;
import org.junit.Test;

import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.config.KSMetaData;
import org.apache.cassandra.db.ArrayBackedSortedColumns;
import org.apache.cassandra.db.ColumnFamily;
import org.apache.cassandra.db.DeletionInfo;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.locator.SimpleStrategy;

import static org.junit.Assert.*;
import static org.apache.cassandra.Util.column;
import static org.apache.cassandra.db.KeyspaceTest.*;

public class RowResolverTest
{
    public static final String KEYSPACE1 = "Keyspace1";
    public static final String CF_STANDARD = "Standard1";

    @BeforeClass
    public static void defineSchema() throws ConfigurationException
    {
        SchemaLoader.prepareServer();
        SchemaLoader.createKeyspace(KEYSPACE1,
                                    SimpleStrategy.class,
                                    KSMetaData.optsWithRF(1),
                                    SchemaLoader.standardCFMD(KEYSPACE1, CF_STANDARD));
    }
    
    @Test
    public void testResolveSupersetNewer()
    {
        ColumnFamily cf1 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf1.addColumn(column("c1", "v1", 0));

        ColumnFamily cf2 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf2.addColumn(column("c1", "v2", 1));

        ColumnFamily resolved = RowDataResolver.resolveSuperset(Arrays.asList(cf1, cf2), System.currentTimeMillis());
        assertColumns(resolved, "c1");
        assertColumns(ColumnFamily.diff(cf1, resolved), "c1");
        assertNull(ColumnFamily.diff(cf2, resolved));
    }

    @Test
    public void testResolveSupersetDisjoint()
    {
        ColumnFamily cf1 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf1.addColumn(column("c1", "v1", 0));

        ColumnFamily cf2 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf2.addColumn(column("c2", "v2", 1));

        ColumnFamily resolved = RowDataResolver.resolveSuperset(Arrays.asList(cf1, cf2), System.currentTimeMillis());
        assertColumns(resolved, "c1", "c2");
        assertColumns(ColumnFamily.diff(cf1, resolved), "c2");
        assertColumns(ColumnFamily.diff(cf2, resolved), "c1");
    }

    @Test
    public void testResolveSupersetNullOne()
    {
        ColumnFamily cf2 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf2.addColumn(column("c2", "v2", 1));

        ColumnFamily resolved = RowDataResolver.resolveSuperset(Arrays.asList(null, cf2), System.currentTimeMillis());
        assertColumns(resolved, "c2");
        assertColumns(ColumnFamily.diff(null, resolved), "c2");
        assertNull(ColumnFamily.diff(cf2, resolved));
    }

    @Test
    public void testResolveSupersetNullTwo()
    {
        ColumnFamily cf1 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf1.addColumn(column("c1", "v1", 0));

        ColumnFamily resolved = RowDataResolver.resolveSuperset(Arrays.asList(cf1, null), System.currentTimeMillis());
        assertColumns(resolved, "c1");
        assertNull(ColumnFamily.diff(cf1, resolved));
        assertColumns(ColumnFamily.diff(null, resolved), "c1");
    }

    @Test
    public void testResolveSupersetNullBoth()
    {
        assertNull(RowDataResolver.resolveSuperset(Arrays.<ColumnFamily>asList(null, null), System.currentTimeMillis()));
    }

    @Test
    public void testResolveDeleted()
    {
        // one CF with columns timestamped before a delete in another cf
        ColumnFamily cf1 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf1.addColumn(column("one", "A", 0));

        ColumnFamily cf2 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf2.delete(new DeletionInfo(1L, (int) (System.currentTimeMillis() / 1000)));

        ColumnFamily resolved = RowDataResolver.resolveSuperset(Arrays.asList(cf1, cf2), System.currentTimeMillis());
        // no columns in the cf
        assertColumns(resolved);
        assertTrue(resolved.isMarkedForDelete());
        assertEquals(1, resolved.deletionInfo().getTopLevelDeletion().markedForDeleteAt);
    }

    @Test
    public void testResolveMultipleDeleted()
    {
        // deletes and columns with interleaved timestamp, with out of order return sequence

        ColumnFamily cf1 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf1.delete(new DeletionInfo(0L, (int) (System.currentTimeMillis() / 1000)));

        // these columns created after the previous deletion
        ColumnFamily cf2 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf2.addColumn(column("one", "A", 1));
        cf2.addColumn(column("two", "A", 1));

        //this column created after the next delete
        ColumnFamily cf3 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf3.addColumn(column("two", "B", 3));

        ColumnFamily cf4 = ArrayBackedSortedColumns.factory.create(KEYSPACE1, "Standard1");
        cf4.delete(new DeletionInfo(2L, (int) (System.currentTimeMillis() / 1000)));

        ColumnFamily resolved = RowDataResolver.resolveSuperset(Arrays.asList(cf1, cf2, cf3, cf4), System.currentTimeMillis());
        // will have deleted marker and one column
        assertColumns(resolved, "two");
        assertColumn(resolved, "two", "B", 3);
        assertTrue(resolved.isMarkedForDelete());
        assertEquals(2, resolved.deletionInfo().getTopLevelDeletion().markedForDeleteAt);
    }
}