korlov42 commented on a change in pull request #9081: URL: https://github.com/apache/ignite/pull/9081#discussion_r682484934
########## File path: modules/core/src/main/java/org/apache/ignite/internal/processors/cache/query/reducer/PageStream.java ########## @@ -0,0 +1,277 @@ +/* + * 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.query.reducer; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.HashSet; +import java.util.Iterator; +import java.util.LinkedList; +import java.util.Queue; +import java.util.UUID; +import java.util.function.BiConsumer; +import java.util.function.Consumer; +import org.apache.ignite.IgniteCheckedException; +import org.apache.ignite.internal.processors.cache.query.GridCacheQueryAdapter; +import org.apache.ignite.internal.util.typedef.internal.U; + +/** + * Iterator over pages stream. Pages are stored in a queue. After polling a queue try load a new page instead of it. + */ +class PageStream<R> { + /** Queue of data of results pages. */ + protected final Queue<Collection<R>> queue = new LinkedList<>(); + + /** Iterator over current page. */ + private Iterator<R> iter; + + /** + * Dynamic collection of nodes that run this query. If a node finishes this query then remove it from this colleciton. + */ + private final Collection<UUID> subgrid; + + /** + * List of nodes that respons with cache query result pages. This collection should be cleaned before sending new + * cache query request. + */ + private final Collection<UUID> rcvd = new HashSet<>(); Review comment: why do you decide to split reducer's logic between actual reducer class and this one? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
