src/java/org/apache/cassandra/utils/memory/MemtableBufferAllocator.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.utils.memory;

import java.nio.ByteBuffer;

import org.apache.cassandra.config.CFMetaData;
import org.apache.cassandra.db.*;
import org.apache.cassandra.db.rows.*;
import org.apache.cassandra.utils.concurrent.OpOrder;

public abstract class MemtableBufferAllocator extends MemtableAllocator
{
    protected MemtableBufferAllocator(SubAllocator onHeap, SubAllocator offHeap)
    {
        super(onHeap, offHeap);
    }

    public Row.Builder rowBuilder(OpOrder.Group writeOp)
    {
        return allocator(writeOp).cloningBTreeRowBuilder();
    }

    public DecoratedKey clone(DecoratedKey key, OpOrder.Group writeOp)
    {
        return new BufferDecoratedKey(key.getToken(), allocator(writeOp).clone(key.getKey()));
    }

    public abstract ByteBuffer allocate(int size, OpOrder.Group opGroup);

    protected AbstractAllocator allocator(OpOrder.Group writeOp)
    {
        return new ContextAllocator(writeOp, this);
    }
}