/*
* 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 java.nio.ByteBuffer;
import java.util.Collection;
import org.junit.Test;
import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.io.sstable.SSTableReader;
import org.apache.cassandra.utils.ByteBufferUtil;
import static org.junit.Assert.assertEquals;
public class ColumnFamilyMetricTest extends SchemaLoader
{
@Test
public void testSizeMetric()
{
Keyspace keyspace = Keyspace.open("Keyspace1");
ColumnFamilyStore store = keyspace.getColumnFamilyStore("Standard1");
store.disableAutoCompaction();
store.truncateBlocking();
assertEquals(0, store.metric.liveDiskSpaceUsed.count());
assertEquals(0, store.metric.totalDiskSpaceUsed.count());
for (int j = 0; j < 10; j++)
{
ByteBuffer key = ByteBufferUtil.bytes(String.valueOf(j));
RowMutation rm = new RowMutation("Keyspace1", key);
rm.add("Standard1", ByteBufferUtil.bytes("0"), ByteBufferUtil.EMPTY_BYTE_BUFFER, j);
rm.apply();
}
store.forceBlockingFlush();
Collection<SSTableReader> sstables = store.getSSTables();
long size = 0;
for (SSTableReader reader : sstables)
{
size += reader.bytesOnDisk();
}
// size metrics should show the sum of all SSTable sizes
assertEquals(size, store.metric.liveDiskSpaceUsed.count());
assertEquals(size, store.metric.totalDiskSpaceUsed.count());
store.truncateBlocking();
// after truncate, size metrics should be down to 0
assertEquals(0, store.metric.liveDiskSpaceUsed.count());
assertEquals(0, store.metric.totalDiskSpaceUsed.count());
store.enableAutoCompaction();
}
}