timoninmaxim commented on a change in pull request #9081: URL: https://github.com/apache/ignite/pull/9081#discussion_r705178320
########## File path: modules/core/src/main/java/org/apache/ignite/internal/processors/cache/query/reducer/UnsortedDistributedCacheQueryReducer.java ########## @@ -0,0 +1,70 @@ +/* + * 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 org.apache.ignite.IgniteCheckedException; +import org.apache.ignite.cluster.ClusterNode; +import org.apache.ignite.internal.processors.cache.query.CacheQueryPageRequester; +import org.apache.ignite.internal.processors.cache.query.GridCacheQueryFutureAdapter; + +/** + * Reducer of distributed query, fetch pages from remote nodes. All pages go in single page stream so no ordering is provided. + */ +public class UnsortedDistributedCacheQueryReducer<R> extends AbstractDistributedCacheQueryReducer<R> { + /** */ + private NodePage<R> page; + + /** + * @param fut Cache query future. + * @param reqId Cache query request ID. + * @param pageRequester Provides a functionality to request pages from remote nodes. + * @param queueLock Lock object that is shared between GridCacheQueryFuture and reducer. + * @param nodes Collection of nodes this query applies to. + */ + public UnsortedDistributedCacheQueryReducer( + GridCacheQueryFutureAdapter fut, long reqId, CacheQueryPageRequester pageRequester, + Object queueLock, Collection<ClusterNode> nodes) { + super(fut, reqId, pageRequester, queueLock, nodes); + } + + /** {@inheritDoc} */ + @Override public boolean hasNext() throws IgniteCheckedException { + if (page != null && page.hasNext()) + return true; + + Collection<NodePageStream<R>> streams = new ArrayList<>(this.streams.values()); + + for (NodePageStream<R> s: streams) { + page = s.nextPage(); + + if (page != null && page.hasNext()) + return true; + + this.streams.remove(s.nodeId()); Review comment: Remove clearing `streams` in cancel(). -- 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]
