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Posted to notifications@ignite.apache.org by GitBox <gi...@apache.org> on 2022/08/05 15:26:22 UTC
[GitHub] [ignite-3] ygerzhedovich commented on a diff in pull request #980: IGNITE-14937 Introduce index management
ygerzhedovich commented on code in PR #980:
URL: https://github.com/apache/ignite-3/pull/980#discussion_r938928596
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modules/index/src/main/java/org/apache/ignite/internal/index/IndexManager.java:
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@@ -0,0 +1,263 @@
+/*
+ * 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.index;
+
+import static org.apache.ignite.internal.schema.definition.TableDefinitionImpl.canonicalName;
+
+import java.util.Arrays;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Consumer;
+import org.apache.ignite.configuration.schemas.table.HashIndexView;
+import org.apache.ignite.configuration.schemas.table.SortedIndexView;
+import org.apache.ignite.configuration.schemas.table.TableIndexChange;
+import org.apache.ignite.configuration.schemas.table.TableIndexView;
+import org.apache.ignite.internal.logger.IgniteLogger;
+import org.apache.ignite.internal.logger.Loggers;
+import org.apache.ignite.internal.manager.IgniteComponent;
+import org.apache.ignite.internal.table.distributed.TableManager;
+import org.apache.ignite.internal.util.CollectionUtils;
+import org.apache.ignite.internal.util.IgniteSpinBusyLock;
+import org.apache.ignite.internal.util.StringUtils;
+import org.apache.ignite.lang.ErrorGroups;
+import org.apache.ignite.lang.ErrorGroups.Common;
+import org.apache.ignite.lang.ErrorGroups.Table;
+import org.apache.ignite.lang.IgniteInternalException;
+import org.apache.ignite.lang.IndexAlreadyExistsException;
+import org.apache.ignite.lang.NodeStoppingException;
+import org.apache.ignite.lang.TableNotFoundException;
+
+/**
+ * An Ignite component that is responsible for handling index-related commands like CREATE or DROP
+ * as well as managing indexes lifecycle.
+ */
+public class IndexManager implements IgniteComponent {
+ private static final IgniteLogger LOG = Loggers.forClass(IndexManager.class);
+
+ private final TableManager tableManager;
+
+ private final Map<UUID, Index> indices = new ConcurrentHashMap<>();
+
+ /** Busy lock to stop synchronously. */
+ private final IgniteSpinBusyLock busyLock = new IgniteSpinBusyLock();
+
+ /** Prevents double stopping of the component. */
+ private final AtomicBoolean stopGuard = new AtomicBoolean();
+
+ /**
+ * Constructor.
+ *
+ * @param tableManager Table manager.
+ */
+ public IndexManager(
+ TableManager tableManager
+ ) {
+ this.tableManager = Objects.requireNonNull(tableManager, "tableManager");
+ }
+
+ /** {@inheritDoc} */
+ @Override
+ public void start() {
+ LOG.info("Index manager started");
+ }
+
+ /** {@inheritDoc} */
+ @Override
+ public void stop() throws Exception {
+ LOG.debug("Index manager is about to stop");
+
+ if (!stopGuard.compareAndSet(false, true)) {
+ LOG.debug("Index manager already stopped");
+
+ return;
+ }
+
+ busyLock.block();
+
+ LOG.info("Index manager stopped");
+ }
+
+ /**
+ * Creates index from provided configuration changer.
+ *
+ * @param schemaName A name of the schema to create index in.
+ * @param indexName A name of the index to create.
+ * @param tableName A name of the table to create index for.
+ * @param indexChange A consumer that suppose to change the configuration in order to provide description of an index.
+ * @return A future represented the result of creation.
+ */
+ // TODO: https://issues.apache.org/jira/browse/IGNITE-17474
+ // Validation of the index name uniqueness is not implemented, because with given
+ // configuration hierarchy this is a bit tricky exercise. Given that this hierarchy
+ // is subject to change in the future, seems to be more rational just to omit this
+ // part for now
+ public CompletableFuture<Index> createIndexAsync(
+ String schemaName,
+ String indexName,
+ String tableName,
+ Consumer<TableIndexChange> indexChange
+ ) {
+ if (!busyLock.enterBusy()) {
+ return CompletableFuture.failedFuture(new NodeStoppingException());
+ }
+
+ LOG.debug("Going to create index [schemaName={}, tableName={}, indexName={}]", schemaName, tableName, indexName);
+
+ try {
+ validateName(indexName);
+ } catch (Exception ex) {
+ return CompletableFuture.failedFuture(ex);
+ }
+
+ try {
+ CompletableFuture<Index> future = new CompletableFuture<>();
+
+ var canonicalName = canonicalName(schemaName, tableName);
+
+ tableManager.tableAsyncInternal(canonicalName).thenAccept((table) -> {
+ if (table == null) {
+ var exception = new TableNotFoundException(canonicalName);
+
+ LOG.info("Unable to create index [schemaName={}, tableName={}, indexName={}]",
+ exception, schemaName, tableName, indexName);
+
+ future.completeExceptionally(exception);
+
+ return;
+ }
+
+ tableManager.alterTableAsync(table.name(), tableChange -> tableChange.changeIndices(indexListChange -> {
+ if (indexListChange.get(indexName) != null) {
+ var exception = new IndexAlreadyExistsException(indexName);
+
+ LOG.info("Unable to create index [schemaName={}, tableName={}, indexName={}]",
+ exception, schemaName, tableName, indexName);
+
+ future.completeExceptionally(exception);
+
+ return;
+ }
+
+ indexListChange.create(indexName, indexChange);
+
+ TableIndexView indexView = indexListChange.get(indexName);
+
+ Set<String> columnNames = Set.copyOf(tableChange.columns().namedListKeys());
+
+ validateColumns(indexView, columnNames);
+ })).whenComplete((index, th) -> {
+ if (th != null) {
+ LOG.info("Unable to create index [schemaName={}, tableName={}, indexName={}]",
+ th, schemaName, tableName, indexName);
+
+ future.completeExceptionally(th);
+ } else if (!future.isDone()) {
+ // don't pay too much attention to this part because it should be reworked
+ // within refactoring of schema objects: when both tables and indexes will be derived
+ // from common parent and become entity of the same level in the configuration,
+ // then there sill be no need to look up indices in such way
+
+ var createdIndex = indices.values().stream()
+ .filter(idx -> indexName.equals(idx.name()))
+ .findFirst()
+ .orElse(null);
+
+ if (createdIndex != null) {
+ LOG.info("Index created [schemaName={}, tableName={}, indexName={}, indexId={}]",
+ schemaName, tableName, indexName, createdIndex.id());
+
+ future.complete(createdIndex);
+ } else {
+ var exception = new IgniteInternalException(
+ Common.UNEXPECTED_ERR, "Looks like the index was concurrently deleted");
Review Comment:
is it possible? I thought that all changer run sequentially and can't be run concurrently
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