| /* |
| * 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.geode.internal.offheap; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| |
| import org.apache.geode.cache.Region; |
| import org.apache.geode.internal.cache.BytesAndBitsForCompactor; |
| import org.apache.geode.internal.cache.EntryBits; |
| import org.apache.geode.internal.cache.EntryEventImpl; |
| import org.apache.geode.internal.cache.RegionEntry; |
| import org.apache.geode.internal.cache.RegionEntryContext; |
| |
| /** |
| * Used to represent stored objects that can be stored in the address field. The RegionEntry for an |
| * off-heap region uses a primitive long to store the off-heap address of the entry's value. If the |
| * value can be encoded as a long (i.e. its serialized representation will fit in the 8 bytes of a |
| * long without looking like an actual off-heap address) then these tiny values on an off-heap |
| * regions are actually stored on the heap in the primitive long field. When these values are |
| * "objectified" they will be an instance of this class. Instances of this class have a very short |
| * lifetime. |
| */ |
| public class TinyStoredObject extends AbstractStoredObject { |
| private final long address; |
| |
| public TinyStoredObject(long addr) { |
| this.address = addr; |
| } |
| |
| @Override |
| public long getAddress() { |
| return this.address; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o instanceof TinyStoredObject) { |
| return getAddress() == ((TinyStoredObject) o).getAddress(); |
| } |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| long value = getAddress(); |
| return (int) (value ^ (value >>> 32)); |
| } |
| |
| @Override |
| public int getSizeInBytes() { |
| return 0; |
| } |
| |
| public byte[] getDecompressedBytes(RegionEntryContext r) { |
| if (isCompressed()) { |
| byte[] bytes = OffHeapRegionEntryHelper.decodeAddressToRawBytes(getAddress()); |
| long time = r.getCachePerfStats().startDecompression(); |
| bytes = r.getCompressor().decompress(bytes); |
| r.getCachePerfStats().endDecompression(time); |
| return bytes; |
| } |
| return getRawBytes(); |
| } |
| |
| /** |
| * If we contain a byte[] return it. Otherwise return the serialize bytes in us in a byte array. |
| */ |
| public byte[] getRawBytes() { |
| return OffHeapRegionEntryHelper.decodeUncompressedAddressToBytes(getAddress()); |
| } |
| |
| @Override |
| public byte[] getSerializedValue() { |
| byte[] value = getRawBytes(); |
| if (!isSerialized()) { |
| value = EntryEventImpl.serialize(value); |
| } |
| return value; |
| } |
| |
| @Override |
| public Object getDeserializedValue(Region r, RegionEntry re) { |
| return OffHeapRegionEntryHelper.decodeAddressToObject(this.address); |
| } |
| |
| @Override |
| public void fillSerializedValue(BytesAndBitsForCompactor wrapper, byte userBits) { |
| byte[] value; |
| if (isSerialized()) { |
| value = getSerializedValue(); |
| userBits = EntryBits.setSerialized(userBits, true); |
| } else { |
| value = (byte[]) getDeserializedForReading(); |
| } |
| wrapper.setData(value, userBits, value.length, true); |
| } |
| |
| @Override |
| public int getValueSizeInBytes() { |
| return 0; |
| } |
| |
| @Override |
| public boolean isSerialized() { |
| return OffHeapRegionEntryHelper.isSerialized(this.address); |
| } |
| |
| @Override |
| public boolean isCompressed() { |
| return OffHeapRegionEntryHelper.isCompressed(this.address); |
| } |
| |
| @Override |
| public void release() { |
| // nothing needed |
| } |
| |
| @Override |
| public boolean retain() { |
| return true; |
| } |
| |
| @Override |
| public int getRefCount() { |
| return -1; |
| } |
| |
| @Override |
| public int getSize() { |
| return Long.BYTES; |
| } |
| |
| @Override |
| public int getDataSize() { |
| return OffHeapRegionEntryHelper.decodeAddressToDataSize(this.address); |
| } |
| |
| @Override |
| public byte readDataByte(int offset) { |
| return getRawBytes()[offset]; |
| } |
| |
| @Override |
| public void writeDataByte(int offset, byte value) { |
| throw new UnsupportedOperationException( |
| "ObjectStoredAsAddress does not support modifying the data bytes"); |
| } |
| |
| @Override |
| public void readDataBytes(int offset, byte[] bytes) { |
| readDataBytes(offset, bytes, 0, bytes.length); |
| } |
| |
| @Override |
| public void writeDataBytes(int offset, byte[] bytes) { |
| writeDataBytes(offset, bytes, 0, bytes.length); |
| } |
| |
| @Override |
| public void readDataBytes(int offset, byte[] bytes, int bytesOffset, int size) { |
| byte[] src = getRawBytes(); |
| int dstIdx = bytesOffset; |
| for (int i = offset; i < offset + size; i++) { |
| bytes[dstIdx++] = src[i]; |
| } |
| } |
| |
| @Override |
| public void writeDataBytes(int offset, byte[] bytes, int bytesOffset, int size) { |
| throw new UnsupportedOperationException( |
| "ObjectStoredAsAddress does not support modifying the data bytes"); |
| } |
| |
| @Override |
| public ByteBuffer createDirectByteBuffer() { |
| return null; |
| } |
| |
| @Override |
| public boolean hasRefCount() { |
| return false; |
| } |
| |
| @Override |
| public boolean checkDataEquals(StoredObject so) { |
| return equals(so); |
| } |
| |
| @Override |
| public boolean checkDataEquals(byte[] serializedObj) { |
| byte[] myBytes = getSerializedValue(); |
| return Arrays.equals(myBytes, serializedObj); |
| } |
| |
| @Override |
| public long getAddressForReadingData(int offset, int size) { |
| throw new UnsupportedOperationException( |
| "ObjectStoredAsAddress does not support reading at an address"); |
| } |
| |
| @Override |
| public StoredObject slice(int offset, int limit) { |
| throw new UnsupportedOperationException("ObjectStoredAsAddress does not support slice"); |
| } |
| } |