| /* |
| * 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.utils.concurrent.OpOrder; |
| |
| public class HeapPool extends MemtablePool |
| { |
| public HeapPool(long maxOnHeapMemory, float cleanupThreshold, Runnable cleaner) |
| { |
| super(maxOnHeapMemory, 0, cleanupThreshold, cleaner); |
| } |
| |
| public MemtableAllocator newAllocator() |
| { |
| return new Allocator(this); |
| } |
| |
| private static class Allocator extends MemtableBufferAllocator |
| { |
| private static final EnsureOnHeap ENSURE_NOOP = new EnsureOnHeap.NoOp(); |
| Allocator(HeapPool pool) |
| { |
| super(pool.onHeap.newAllocator(), pool.offHeap.newAllocator()); |
| } |
| |
| public ByteBuffer allocate(int size, OpOrder.Group opGroup) |
| { |
| super.onHeap().allocate(size, opGroup); |
| return ByteBuffer.allocate(size); |
| } |
| |
| public EnsureOnHeap ensureOnHeap() |
| { |
| return ENSURE_NOOP; |
| } |
| } |
| } |