| /* |
| * 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.index.impl; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Iterator; |
| import java.util.NavigableSet; |
| import java.util.NoSuchElementException; |
| import java.util.Objects; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.ConcurrentSkipListSet; |
| import java.util.stream.Collectors; |
| import org.apache.ignite.internal.schema.BinaryTuple; |
| import org.apache.ignite.internal.storage.RowId; |
| import org.apache.ignite.internal.storage.index.HashIndexStorage; |
| import org.apache.ignite.internal.storage.index.IndexRow; |
| import org.apache.ignite.internal.storage.index.StorageHashIndexDescriptor; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Test-only implementation of a {@link HashIndexStorage}. |
| */ |
| public class TestHashIndexStorage extends AbstractTestIndexStorage implements HashIndexStorage { |
| private final ConcurrentMap<ByteBuffer, NavigableSet<RowId>> index = new ConcurrentHashMap<>(); |
| |
| private final StorageHashIndexDescriptor descriptor; |
| |
| /** Constructor. */ |
| public TestHashIndexStorage(int partitionId, StorageHashIndexDescriptor descriptor) { |
| super(partitionId, descriptor); |
| |
| this.descriptor = descriptor; |
| } |
| |
| @Override |
| public StorageHashIndexDescriptor indexDescriptor() { |
| return descriptor; |
| } |
| |
| @Override |
| Iterator<RowId> getRowIdIteratorForGetByBinaryTuple(BinaryTuple key) { |
| return new RowIdIterator(key.byteBuffer()); |
| } |
| |
| @Override |
| public void put(IndexRow row) { |
| checkStorageClosed(false); |
| |
| index.compute(row.indexColumns().byteBuffer(), (k, v) -> { |
| if (v == null) { |
| v = new ConcurrentSkipListSet<>(); |
| } |
| |
| v.add(row.rowId()); |
| |
| return v; |
| }); |
| } |
| |
| @Override |
| public void remove(IndexRow row) { |
| checkStorageClosedOrInProcessOfRebalance(false); |
| |
| index.computeIfPresent(row.indexColumns().byteBuffer(), (k, v) -> { |
| if (v.remove(row.rowId()) && v.isEmpty()) { |
| return null; |
| } |
| |
| return v; |
| }); |
| } |
| |
| @Override |
| void clear0() { |
| index.clear(); |
| } |
| |
| /** |
| * Returns all indexed row ids. |
| */ |
| public Set<RowId> allRowsIds() { |
| return index.values().stream().flatMap(Set::stream).collect(Collectors.toSet()); |
| } |
| |
| /** |
| * Row IDs iterator that always returns up-to-date values. |
| */ |
| private class RowIdIterator implements Iterator<RowId> { |
| private final ByteBuffer key; |
| |
| @Nullable Boolean hasNext; |
| |
| @Nullable RowId rowId; |
| |
| RowIdIterator(ByteBuffer key) { |
| this.key = key; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| if (hasNext != null) { |
| return hasNext; |
| } |
| |
| // Yes, we must read it every time, because concurrency. |
| NavigableSet<RowId> rowIds = index.get(key); |
| |
| if (rowIds == null) { |
| rowId = null; |
| } else if (rowId == null) { |
| rowId = rowIds.stream().findFirst().orElse(null); |
| } else { |
| rowId = rowIds.higher(rowId); |
| } |
| |
| hasNext = rowId != null; |
| |
| return hasNext; |
| } |
| |
| @Override |
| public RowId next() { |
| if (!hasNext()) { |
| throw new NoSuchElementException(); |
| } |
| |
| hasNext = null; |
| |
| return Objects.requireNonNull(rowId); |
| } |
| } |
| } |