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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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.cassandra.cache;
import org.apache.cassandra.io.sstable.format.SSTableReader;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.Util;
import org.apache.cassandra.config.KSMetaData;
import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.Keyspace;
import org.apache.cassandra.db.RowIndexEntry;
import org.apache.cassandra.db.Mutation;
import org.apache.cassandra.exceptions.ConfigurationException;
import org.apache.cassandra.locator.SimpleStrategy;
import org.apache.cassandra.service.CacheService;
import org.apache.cassandra.utils.ByteBufferUtil;
public class AutoSavingCacheTest
{
private static final String KEYSPACE1 = "AutoSavingCacheTest1";
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 testSerializeAndLoadKeyCache() throws Exception
{
ColumnFamilyStore cfs = Keyspace.open(KEYSPACE1).getColumnFamilyStore(CF_STANDARD1);
for (int i = 0; i < 2; i++)
{
Mutation rm = new Mutation(KEYSPACE1, ByteBufferUtil.bytes("key1"));
rm.add(CF_STANDARD1, Util.cellname("c1"), ByteBufferUtil.bytes(i), 0);
rm.applyUnsafe();
cfs.forceBlockingFlush();
}
Assert.assertEquals(2, cfs.getSSTables().size());
// preheat key cache
for (SSTableReader sstable : cfs.getSSTables())
sstable.getPosition(Util.dk("key1"), SSTableReader.Operator.EQ);
AutoSavingCache<KeyCacheKey, RowIndexEntry> keyCache = CacheService.instance.keyCache;
// serialize to file
keyCache.submitWrite(keyCache.size()).get();
keyCache.clear();
Assert.assertEquals(0, keyCache.size());
// then load saved
keyCache.loadSaved(cfs);
Assert.assertEquals(2, keyCache.size());
for (SSTableReader sstable : cfs.getSSTables())
Assert.assertNotNull(keyCache.get(new KeyCacheKey(cfs.metadata.cfId, sstable.descriptor, ByteBufferUtil.bytes("key1"))));
}
}