| /** |
| * 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; |
| |
| import java.util.Set; |
| import org.apache.pulsar.broker.BundleData; |
| import org.apache.pulsar.broker.ServiceConfiguration; |
| |
| /** |
| * Load management component which determines what brokers should not be considered for topic placement by the placement |
| * strategy. For example, the placement strategy may determine that the broker with the least msg/s should get the |
| * bundle assignment, but we may not want to consider brokers whose CPU usage is very high. Thus, we could use a filter |
| * to blacklist brokers with high CPU usage. |
| */ |
| public interface BrokerFilter { |
| |
| /** |
| * From the given set of available broker candidates, filter those using the load data. |
| * |
| * @param brokers |
| * The currently available brokers that have not already been filtered. This set may be modified by |
| * filter. |
| * @param bundleToAssign |
| * The data for the bundle to assign. |
| * @param loadData |
| * The load data from the leader broker. |
| * @param conf |
| * The service configuration. |
| * @throws BrokerFilterException |
| * There was an error in the pipeline and the brokers should be reset to their original value |
| */ |
| void filter(Set<String> brokers, BundleData bundleToAssign, LoadData loadData, ServiceConfiguration conf) |
| throws BrokerFilterException; |
| } |