| /* |
| * 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.processors.cache.persistence.partstate; |
| |
| import org.apache.ignite.internal.pagemem.FullPageId; |
| import org.apache.ignite.internal.pagemem.PageIdAllocator; |
| import org.apache.ignite.internal.pagemem.PageIdUtils; |
| import org.apache.ignite.internal.pagemem.PageMemory; |
| import org.apache.ignite.internal.util.typedef.internal.S; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * Pair of cache group ID with partition ID. Immutable, comparable class, may be used as key in maps |
| */ |
| public class GroupPartitionId implements Comparable<GroupPartitionId> { |
| /** Index for super(meta) page. There is always such page for iterated cache partition */ |
| private static final int METAPAGE_IDX = 0; |
| |
| /** Cache group ID. */ |
| private final int grpId; |
| |
| /** Partition ID. */ |
| private final int partId; |
| |
| /** |
| * Creates group-partition tuple. |
| * |
| * @param grpId Group ID. |
| * @param partId Partition ID. |
| */ |
| public GroupPartitionId(final int grpId, final int partId) { |
| this.grpId = grpId; |
| this.partId = partId; |
| } |
| |
| /** |
| * @param partId Partition ID. |
| * @return flag to be used for partition |
| */ |
| private static byte getFlagByPartId(final int partId) { |
| return partId == PageIdAllocator.INDEX_PARTITION ? PageMemory.FLAG_IDX : PageMemory.FLAG_DATA; |
| } |
| |
| /** |
| * @return cache ID |
| */ |
| public int getGroupId() { |
| return grpId; |
| } |
| |
| /** |
| * @return Partition ID |
| */ |
| public int getPartitionId() { |
| return partId; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return S.toString(GroupPartitionId.class, this); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean equals(Object o) { |
| if (this == o) |
| return true; |
| |
| if (o == null || getClass() != o.getClass()) |
| return false; |
| |
| GroupPartitionId key = (GroupPartitionId)o; |
| |
| if (grpId != key.grpId) |
| return false; |
| |
| return partId == key.partId; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int hashCode() { |
| int result = grpId; |
| |
| result = 31 * result + partId; |
| |
| return result; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int compareTo(@NotNull GroupPartitionId o) { |
| if (getGroupId() < o.getGroupId()) |
| return -1; |
| |
| if (getGroupId() > o.getGroupId()) |
| return 1; |
| |
| if (getPartitionId() < o.getPartitionId()) |
| return -1; |
| |
| if (getPartitionId() > o.getPartitionId()) |
| return 1; |
| return 0; |
| } |
| |
| /** |
| * @param pageIdx Page Index, monotonically growing number within each partition |
| * @return page ID (64 bits) constructed from partition ID and given index |
| */ |
| private long createPageId(final int pageIdx) { |
| final int partId = getPartitionId(); |
| |
| return PageIdUtils.pageId(partId, getFlagByPartId(partId), pageIdx); |
| } |
| |
| /** |
| * Returns Full page ID. For index 0 will return super-page of next partition |
| * |
| * @param pageIdx Page Index, monotonically growing number within each partition |
| * @return FullPageId consists of cache ID (32 bits) and page ID (64 bits). |
| */ |
| @NotNull private FullPageId createFullPageId(final int pageIdx) { |
| return new FullPageId(createPageId(pageIdx), getGroupId()); |
| } |
| |
| /** |
| * @return will return super-page (metapage) of this partition |
| */ |
| @NotNull public FullPageId createFirstPageFullId() { |
| return createFullPageId(METAPAGE_IDX); |
| } |
| } |