AMashenkov commented on code in PR #3358: URL: https://github.com/apache/ignite-3/pull/3358#discussion_r1522909053
########## modules/table/src/main/java/org/apache/ignite/internal/table/SynchronousPriorityQueue.java: ########## @@ -0,0 +1,124 @@ +/* + * 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.table; + +import java.util.ArrayList; +import java.util.Comparator; +import java.util.List; +import java.util.PriorityQueue; +import java.util.function.ToLongFunction; + +/** + * A thread-safe wrapper over {@link java.util.PriorityQueue}, which uses {@code long} value for ordering. + * The implementation provides a method to poll top item up to the given priority. + * + * @param <T> Item type. + */ +public class SynchronousPriorityQueue<T> { + /** A queue. Guarded by itself. */ + private final PriorityQueue<T> queue; + private final ToLongFunction<T> priorityExtractor; + + /** + * Creates a queue. + * + * @param priorityExtractor Priority extractor. + */ + public SynchronousPriorityQueue(ToLongFunction<T> priorityExtractor) { Review Comment: > `LwmDestuctionQueue` It does not used for "destroying LWM". LWM (a timestamp) is not used as a key. Maybe, `LongPriorityQueue`? -- 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]
