merlimat commented on a change in pull request #4062: Delayed message delivery implementation URL: https://github.com/apache/pulsar/pull/4062#discussion_r286260601
########## File path: pulsar-common/src/main/java/org/apache/pulsar/common/util/collections/TripleLongPriorityQueue.java ########## @@ -0,0 +1,187 @@ +/** + * 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.pulsar.common.util.collections; + +import static com.google.common.base.Preconditions.checkArgument; + +import io.netty.buffer.ByteBuf; +import io.netty.buffer.PooledByteBufAllocator; + +/** + * Provides a priority-queue implementation specialized on items composed by 3 longs. + * + * This class is not thread safe and the items are stored in direct memory. + */ +public class TripleLongPriorityQueue implements AutoCloseable { + + private static final int SIZE_OF_LONG = 8; + private static final int DEFAULT_INITIAL_CAPACITY = 16; + + // Each item is composed of 3 longs + private static final int ITEMS_COUNT = 3; + + private static final int TUPLE_SIZE = ITEMS_COUNT * SIZE_OF_LONG; + + private final ByteBuf buffer; + + private int capacity; + private int size; + + public TripleLongPriorityQueue() { + this(DEFAULT_INITIAL_CAPACITY); + } + + public TripleLongPriorityQueue(int initialCapacity) { + capacity = initialCapacity; + buffer = PooledByteBufAllocator.DEFAULT.directBuffer(initialCapacity * ITEMS_COUNT * SIZE_OF_LONG); + size = 0; + } + + @Override + public void close() { + buffer.release(); + } + + public void add(long n1, long n2, long n3) { + if (size == capacity) { + increaseCapacity(); + } + + put(size, n1, n2, n3); + siftUp(size); + ++size; + } + + public long peekN1() { Review comment: Sure, will add these ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
