/*
* 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.security.MessageDigest;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.db.composites.CellNameType;
import org.apache.cassandra.serializers.MarshalException;
import org.apache.cassandra.utils.FBUtilities;
import org.apache.cassandra.utils.ObjectSizes;
import org.apache.cassandra.utils.concurrent.OpOrder;
import org.apache.cassandra.utils.memory.AbstractAllocator;
import org.apache.cassandra.utils.memory.MemtableAllocator;
import org.apache.cassandra.utils.memory.NativeAllocator;
public class NativeExpiringCell extends NativeCell implements ExpiringCell
{
private static final long SIZE = ObjectSizes.measure(new NativeExpiringCell());
private NativeExpiringCell()
{}
public NativeExpiringCell(NativeAllocator allocator, OpOrder.Group writeOp, ExpiringCell copyOf)
{
super(allocator, writeOp, copyOf);
}
@Override
protected int sizeOf(Cell cell)
{
return super.sizeOf(cell) + 8;
}
@Override
protected void construct(Cell from)
{
ExpiringCell expiring = (ExpiringCell) from;
setInt(internalSize() - 4, expiring.getTimeToLive());
setInt(internalSize() - 8, expiring.getLocalDeletionTime());
super.construct(from);
}
@Override
protected int postfixSize()
{
return 8;
}
@Override
public int getTimeToLive()
{
return getInt(internalSize() - 4);
}
@Override
public int getLocalDeletionTime()
{
return getInt(internalSize() - 8);
}
@Override
public boolean isLive()
{
return isLive(System.currentTimeMillis());
}
@Override
public boolean isLive(long now)
{
return (int) (now / 1000) < getLocalDeletionTime();
}
@Override
public int serializationFlags()
{
return ColumnSerializer.EXPIRATION_MASK;
}
@Override
public int cellDataSize()
{
return super.cellDataSize() + TypeSizes.NATIVE.sizeof(getLocalDeletionTime()) + TypeSizes.NATIVE.sizeof(getTimeToLive());
}
@Override
public int serializedSize(CellNameType type, TypeSizes typeSizes)
{
/*
* An expired column adds to a Cell :
* 4 bytes for the localExpirationTime
* + 4 bytes for the timeToLive
*/
return super.serializedSize(type, typeSizes) + typeSizes.sizeof(getLocalDeletionTime()) + typeSizes.sizeof(getTimeToLive());
}
@Override
public void validateFields(CFMetaData metadata) throws MarshalException
{
super.validateFields(metadata);
if (getTimeToLive() <= 0)
throw new MarshalException("A column TTL should be > 0");
if (getLocalDeletionTime() < 0)
throw new MarshalException("The local expiration time should not be negative");
}
@Override
public void updateDigest(MessageDigest digest)
{
super.updateDigest(digest);
FBUtilities.updateWithInt(digest, getTimeToLive());
}
public boolean equals(Cell cell)
{
return cell instanceof ExpiringCell && equals((ExpiringCell) cell);
}
protected boolean equals(ExpiringCell cell)
{
// super.equals() returns false if o is not a CounterCell
return super.equals(cell)
&& getLocalDeletionTime() == cell.getLocalDeletionTime()
&& getTimeToLive() == cell.getTimeToLive();
}
@Override
public String getString(CellNameType comparator)
{
return String.format("%s(%s!%d)", getClass().getSimpleName(), super.getString(comparator), getTimeToLive());
}
@Override
public ExpiringCell localCopy(CFMetaData metadata, AbstractAllocator allocator)
{
return new BufferExpiringCell(name().copy(metadata, allocator), allocator.clone(value()), timestamp(), getTimeToLive(), getLocalDeletionTime());
}
@Override
public ExpiringCell localCopy(CFMetaData metadata, MemtableAllocator allocator, OpOrder.Group opGroup)
{
return allocator.clone(this, metadata, opGroup);
}
@Override
public long excessHeapSizeExcludingData()
{
return SIZE;
}
@Override
public long unsharedHeapSize()
{
return SIZE;
}
}