test/unit/org/apache/cassandra/db/RemoveCellTest.java

/*
* 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.db;

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

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;

import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.Util;
import org.apache.cassandra.config.KSMetaData;
import org.apache.cassandra.db.filter.QueryFilter;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.locator.SimpleStrategy;
import org.apache.cassandra.utils.ByteBufferUtil;

public class RemoveCellTest
{
    private static final String KEYSPACE1 = "RemoveCellTest";
    private static final String CF_STANDARD1 = "Standard1";

    @BeforeClass
    public static void defineSchema() throws ConfigurationException
    {
        SchemaLoader.prepareServer();
        SchemaLoader.createKeyspace(KEYSPACE1,
                                    SimpleStrategy.class,
                                    KSMetaData.optsWithRF(1),
                                    SchemaLoader.standardCFMD(KEYSPACE1, CF_STANDARD1));
    }

    @Test
    public void testRemoveColumn()
    {
        Keyspace keyspace = Keyspace.open(KEYSPACE1);
        ColumnFamilyStore store = keyspace.getColumnFamilyStore("Standard1");
        Mutation rm;
        DecoratedKey dk = Util.dk("key1");

        // add data
        rm = new Mutation(KEYSPACE1, dk.getKey());
        rm.add("Standard1", Util.cellname("Column1"), ByteBufferUtil.bytes("asdf"), 0);
        rm.applyUnsafe();
        store.forceBlockingFlush();

        // remove
        rm = new Mutation(KEYSPACE1, dk.getKey());
        rm.delete("Standard1", Util.cellname("Column1"), 1);
        rm.applyUnsafe();

        ColumnFamily retrieved = store.getColumnFamily(Util.namesQueryFilter(store, dk, "Column1"));
        assertFalse(retrieved.getColumn(Util.cellname("Column1")).isLive());
        assertNull(Util.cloneAndRemoveDeleted(retrieved, Integer.MAX_VALUE));
        assertNull(Util.cloneAndRemoveDeleted(store.getColumnFamily(QueryFilter.getIdentityFilter(dk,
                                                                                                  "Standard1",
                                                                                                  System.currentTimeMillis())),
                                              Integer.MAX_VALUE));
    }

    private static BufferDeletedCell dc(String name, int ldt, long timestamp)
    {
        return new BufferDeletedCell(Util.cellname(name), ldt, timestamp);
    }

    @Test
    public void deletedColumnShouldAlwaysBeMarkedForDelete()
    {
        // Check for bug in #4307
        long timestamp = System.currentTimeMillis();
        int localDeletionTime = (int) (timestamp / 1000);
        Cell c = dc("dc1", localDeletionTime, timestamp);
        assertFalse("DeletedCell was not marked for delete", c.isLive(timestamp));

        // Simulate a node that is 30 seconds behind
        c = dc("dc2", localDeletionTime + 30, timestamp + 30000);
        assertFalse("DeletedCell was not marked for delete", c.isLive(timestamp));

        // Simulate a node that is 30 ahead behind
        c = dc("dc3", localDeletionTime - 30, timestamp - 30000);
        assertFalse("DeletedCell was not marked for delete", c.isLive(timestamp));
    }

}