/*
* 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.io.IOException;
import java.nio.ByteBuffer;
import java.security.MessageDigest;
import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.io.util.DataOutputBuffer;
import org.apache.cassandra.serializers.MarshalException;
import org.apache.cassandra.utils.Allocator;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.cassandra.utils.HeapAllocator;
public class DeletedColumn extends Column
{
public DeletedColumn(ByteBuffer name, int localDeletionTime, long timestamp)
{
this(name, ByteBufferUtil.bytes(localDeletionTime), timestamp);
}
public DeletedColumn(ByteBuffer name, ByteBuffer value, long timestamp)
{
super(name, value, timestamp);
}
@Override
public Column withUpdatedName(ByteBuffer newName)
{
return new DeletedColumn(newName, value, timestamp);
}
@Override
public Column withUpdatedTimestamp(long newTimestamp)
{
return new DeletedColumn(name, value, newTimestamp);
}
@Override
public boolean isMarkedForDelete(long now)
{
return true;
}
@Override
public long getMarkedForDeleteAt()
{
return timestamp;
}
@Override
public void updateDigest(MessageDigest digest)
{
digest.update(name.duplicate());
DataOutputBuffer buffer = new DataOutputBuffer();
try
{
buffer.writeLong(timestamp);
buffer.writeByte(serializationFlags());
}
catch (IOException e)
{
throw new RuntimeException(e);
}
digest.update(buffer.getData(), 0, buffer.getLength());
}
@Override
public int getLocalDeletionTime()
{
return value.getInt(value.position());
}
@Override
public Column reconcile(Column column, Allocator allocator)
{
if (column instanceof DeletedColumn)
return super.reconcile(column, allocator);
return column.reconcile(this, allocator);
}
@Override
public Column localCopy(ColumnFamilyStore cfs)
{
return new DeletedColumn(cfs.internOrCopy(name, HeapAllocator.instance), ByteBufferUtil.clone(value), timestamp);
}
@Override
public Column localCopy(ColumnFamilyStore cfs, Allocator allocator)
{
return new DeletedColumn(cfs.internOrCopy(name, allocator), allocator.clone(value), timestamp);
}
@Override
public int serializationFlags()
{
return ColumnSerializer.DELETION_MASK;
}
@Override
public void validateFields(CFMetaData metadata) throws MarshalException
{
validateName(metadata);
if (value().remaining() != 4)
throw new MarshalException("A tombstone value should be 4 bytes long");
if (getLocalDeletionTime() < 0)
throw new MarshalException("The local deletion time should not be negative");
}
public static DeletedColumn create(int localDeletionTime, long timestamp, String... names)
{
return new DeletedColumn(decomposeName(names), localDeletionTime, timestamp);
}
}