| /* |
| * 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.ignite.internal.binary.streams; |
| |
| import org.apache.ignite.internal.util.typedef.internal.U; |
| |
| import static org.apache.ignite.IgniteSystemProperties.IGNITE_MARSHAL_BUFFERS_RECHECK; |
| |
| /** |
| * Memory allocator chunk. |
| */ |
| public class BinaryMemoryAllocatorChunk { |
| /** Buffer size re-check frequency. */ |
| private static final Long CHECK_FREQ = Long.getLong(IGNITE_MARSHAL_BUFFERS_RECHECK, 10000); |
| |
| /** Data array */ |
| private byte[] data; |
| |
| /** Max message size detected between checks. */ |
| private int maxMsgSize; |
| |
| /** Last time array size is checked. */ |
| private long lastCheck = U.currentTimeMillis(); |
| |
| /** Whether the holder is acquired or not. */ |
| private boolean acquired; |
| |
| /** |
| * Allocate. |
| * |
| * @param size Desired size. |
| * @return Data. |
| */ |
| public byte[] allocate(int size) { |
| if (acquired) |
| return new byte[size]; |
| |
| acquired = true; |
| |
| if (data == null || size > data.length) |
| data = new byte[size]; |
| |
| return data; |
| } |
| |
| /** |
| * Reallocate. |
| * |
| * @param data Old data. |
| * @param size Size. |
| * @return New data. |
| */ |
| public byte[] reallocate(byte[] data, int size) { |
| byte[] newData = new byte[size]; |
| |
| if (this.data == data) |
| this.data = newData; |
| |
| System.arraycopy(data, 0, newData, 0, data.length); |
| |
| return newData; |
| } |
| |
| /** |
| * Shrinks array size if needed. |
| */ |
| public void release(byte[] data, int maxMsgSize) { |
| if (this.data != data) |
| return; |
| |
| if (maxMsgSize > this.maxMsgSize) |
| this.maxMsgSize = maxMsgSize; |
| |
| this.acquired = false; |
| |
| long now = U.currentTimeMillis(); |
| |
| if (now - this.lastCheck >= CHECK_FREQ) { |
| int halfSize = data.length >> 1; |
| |
| if (this.maxMsgSize < halfSize) |
| this.data = new byte[halfSize]; |
| |
| this.lastCheck = now; |
| } |
| } |
| |
| /** |
| * @return {@code True} if acquired. |
| */ |
| public boolean isAcquired() { |
| return acquired; |
| } |
| } |