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[improve][broker] PIP-192 Added broker and top-bundles load reporters
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111
...ker/src/main/java/org/apache/pulsar/broker/loadbalance/extensions/models/TopKBundles.java
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| @@ -0,0 +1,111 @@ | ||
| /* | ||
| * 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.broker.loadbalance.extensions.models; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.Collections; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import lombok.EqualsAndHashCode; | ||
| import lombok.Getter; | ||
| import lombok.NoArgsConstructor; | ||
| import lombok.ToString; | ||
| import org.apache.pulsar.broker.loadbalance.extensions.data.TopBundlesLoadData; | ||
| import org.apache.pulsar.common.naming.NamespaceName; | ||
| import org.apache.pulsar.policies.data.loadbalancer.NamespaceBundleStats; | ||
|
|
||
| /** | ||
| * Defines the information of top bundles load data. | ||
| */ | ||
| @Getter | ||
| @ToString | ||
| @EqualsAndHashCode | ||
| @NoArgsConstructor | ||
| public class TopKBundles { | ||
|
|
||
| // temp array for sorting | ||
| private final List<Map.Entry<String, ? extends Comparable>> arr = new ArrayList<>(); | ||
|
|
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| private final TopBundlesLoadData loadData = new TopBundlesLoadData(); | ||
|
|
||
| /** | ||
| * Return TopBundlesLoadData with the given bundleStats. | ||
| * | ||
| * @param bundleStats bundle stats. | ||
| * @param topk top k bundle stats to select. | ||
| */ | ||
| public void update(Map<String, NamespaceBundleStats> bundleStats, int topk) { | ||
| arr.clear(); | ||
| for (var etr : bundleStats.entrySet()) { | ||
| if (etr.getKey().startsWith(NamespaceName.SYSTEM_NAMESPACE.toString())) { | ||
| continue; | ||
| } | ||
| arr.add(etr); | ||
| } | ||
| List<TopBundlesLoadData.BundleLoadData> topKBundlesLoadData = loadData.getTopBundlesLoadData(); | ||
| topKBundlesLoadData.clear(); | ||
| if (arr.isEmpty()) { | ||
| return; | ||
| } | ||
| topk = Math.min(topk, arr.size()); | ||
| partitionSort(arr, topk); | ||
|
|
||
| for (int i = 0; i < topk; i++) { | ||
| var etr = arr.get(i); | ||
| topKBundlesLoadData.add( | ||
| new TopBundlesLoadData.BundleLoadData(etr.getKey(), (NamespaceBundleStats) etr.getValue())); | ||
| } | ||
| } | ||
|
|
||
| static void partitionSort(List<Map.Entry<String, ? extends Comparable>> arr, int k) { | ||
| int start = 0; | ||
| int end = arr.size() - 1; | ||
| int target = k - 1; | ||
| while (start < end) { | ||
| int lo = start; | ||
| int hi = end; | ||
| int mid = lo; | ||
| var pivot = arr.get(hi).getValue(); | ||
| while (mid <= hi) { | ||
| int cmp = pivot.compareTo(arr.get(mid).getValue()); | ||
| if (cmp < 0) { | ||
| var tmp = arr.get(lo); | ||
| arr.set(lo++, arr.get(mid)); | ||
| arr.set(mid++, tmp); | ||
| } else if (cmp > 0) { | ||
| var tmp = arr.get(mid); | ||
| arr.set(mid, arr.get(hi)); | ||
| arr.set(hi--, tmp); | ||
| } else { | ||
| mid++; | ||
| } | ||
| } | ||
| if (lo <= target && target < mid) { | ||
| end = lo; | ||
| break; | ||
| } | ||
| if (target < lo) { | ||
| end = lo - 1; | ||
| } else { | ||
| start = mid; | ||
| } | ||
| } | ||
| Collections.sort(arr.subList(0, end), (a, b) -> b.getValue().compareTo(a.getValue())); | ||
| } | ||
| } |
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