| /* |
| * 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.storage.pagememory.mv; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Objects; |
| import org.apache.ignite.internal.pagememory.Storable; |
| import org.apache.ignite.internal.pagememory.io.AbstractDataPageIo; |
| import org.apache.ignite.internal.pagememory.io.IoVersions; |
| import org.apache.ignite.internal.storage.pagememory.mv.io.RowVersionDataIo; |
| import org.apache.ignite.internal.tostring.IgniteToStringExclude; |
| import org.apache.ignite.internal.tostring.S; |
| import org.apache.ignite.internal.tx.Timestamp; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Represents row version inside row version chain. |
| */ |
| public class RowVersion implements Storable { |
| /** |
| * A 'timestamp' representing absense of a timestamp. |
| */ |
| public static final Timestamp NULL_TIMESTAMP = new Timestamp(Long.MIN_VALUE, Long.MIN_VALUE); |
| |
| /** |
| * Represents an absent partitionless link. |
| */ |
| public static final long NULL_LINK = 0; |
| |
| private static final int TIMESTAMP_STORE_SIZE_BYTES = 2 * Long.BYTES; |
| private static final int NEXT_LINK_STORE_SIZE_BYTES = PartitionlessLinks.PARTITIONLESS_LINK_SIZE_BYTES; |
| private static final int VALUE_SIZE_STORE_SIZE_BYTES = Integer.BYTES; |
| |
| public static final int TIMESTAMP_OFFSET = 0; |
| public static final int NEXT_LINK_OFFSET = TIMESTAMP_STORE_SIZE_BYTES; |
| public static final int VALUE_SIZE_OFFSET = NEXT_LINK_OFFSET + NEXT_LINK_STORE_SIZE_BYTES; |
| public static final int VALUE_OFFSET = VALUE_SIZE_OFFSET + VALUE_SIZE_STORE_SIZE_BYTES; |
| |
| private final int partitionId; |
| private long link; |
| |
| @Nullable |
| private final Timestamp timestamp; |
| private final long nextLink; |
| private final int valueSize; |
| @IgniteToStringExclude |
| @Nullable |
| private final ByteBuffer value; |
| |
| /** |
| * Constructor. |
| */ |
| public RowVersion(int partitionId, long nextLink, ByteBuffer value) { |
| this(partitionId, 0, null, nextLink, value); |
| } |
| |
| /** |
| * Constructor. |
| */ |
| public RowVersion(int partitionId, long link, @Nullable Timestamp timestamp, long nextLink, @Nullable ByteBuffer value) { |
| this.partitionId = partitionId; |
| link(link); |
| |
| assert !NULL_TIMESTAMP.equals(timestamp) : "Null timestamp provided"; |
| |
| this.timestamp = timestamp; |
| this.nextLink = nextLink; |
| this.valueSize = value == null ? -1 : value.limit(); |
| this.value = value; |
| } |
| |
| @Nullable |
| public Timestamp timestamp() { |
| return timestamp; |
| } |
| |
| public Timestamp timestampForStorage() { |
| return timestampForStorage(timestamp); |
| } |
| |
| static Timestamp timestampForStorage(Timestamp timestamp) { |
| return timestamp == null ? NULL_TIMESTAMP : timestamp; |
| } |
| |
| /** |
| * Returns partitionless link of the next version or {@code 0} if this version is the last in the chain (i.e. it's the oldest version). |
| * |
| * @return partitionless link of the next version or {@code 0} if this version is the last in the chain |
| */ |
| public long nextLink() { |
| return nextLink; |
| } |
| |
| public int valueSize() { |
| return valueSize; |
| } |
| |
| public ByteBuffer value() { |
| return Objects.requireNonNull(value); |
| } |
| |
| public boolean hasNextLink() { |
| return nextLink != NULL_LINK; |
| } |
| |
| boolean isTombstone() { |
| return isTombstone(valueSize()); |
| } |
| |
| static boolean isTombstone(int valueSize) { |
| return valueSize == 0; |
| } |
| |
| static boolean isTombstone(byte[] valueBytes) { |
| return isTombstone(valueBytes.length); |
| } |
| |
| boolean isUncommitted() { |
| return isUncommitted(timestamp); |
| } |
| |
| static boolean isUncommitted(Timestamp timestamp) { |
| return timestamp == null; |
| } |
| |
| boolean isCommitted() { |
| return timestamp != null; |
| } |
| |
| @Override |
| public final void link(long link) { |
| this.link = link; |
| } |
| |
| @Override |
| public final long link() { |
| return link; |
| } |
| |
| @Override |
| public final int partition() { |
| return partitionId; |
| } |
| |
| @Override |
| public int size() { |
| assert value != null; |
| |
| return TIMESTAMP_STORE_SIZE_BYTES + NEXT_LINK_STORE_SIZE_BYTES + VALUE_SIZE_STORE_SIZE_BYTES + value.limit(); |
| } |
| |
| @Override |
| public int headerSize() { |
| return TIMESTAMP_STORE_SIZE_BYTES + NEXT_LINK_STORE_SIZE_BYTES + VALUE_SIZE_STORE_SIZE_BYTES; |
| } |
| |
| @Override |
| public IoVersions<? extends AbstractDataPageIo> ioVersions() { |
| return RowVersionDataIo.VERSIONS; |
| } |
| |
| @Override |
| public String toString() { |
| return S.toString(RowVersion.class, this); |
| } |
| } |