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[improve][broker] PIP-192 Added ServiceUnitStateCompactionStrategy (#…
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89 changes: 89 additions & 0 deletions
89
...ache/pulsar/broker/loadbalance/extensions/channel/ServiceUnitStateCompactionStrategy.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /* | ||
| * 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.channel; | ||
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| import static org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitState.Assigned; | ||
| import static org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitState.Free; | ||
| import static org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitState.Owned; | ||
| import static org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitState.Released; | ||
| import static org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitState.Splitting; | ||
| import com.google.common.annotations.VisibleForTesting; | ||
| import org.apache.commons.lang.StringUtils; | ||
| import org.apache.pulsar.client.api.Schema; | ||
| import org.apache.pulsar.common.topics.TopicCompactionStrategy; | ||
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| public class ServiceUnitStateCompactionStrategy implements TopicCompactionStrategy<ServiceUnitStateData> { | ||
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| private final Schema<ServiceUnitStateData> schema; | ||
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| private boolean checkBrokers = true; | ||
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| public ServiceUnitStateCompactionStrategy() { | ||
| schema = Schema.JSON(ServiceUnitStateData.class); | ||
| } | ||
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| @Override | ||
| public Schema<ServiceUnitStateData> getSchema() { | ||
| return schema; | ||
| } | ||
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| @VisibleForTesting | ||
| public void checkBrokers(boolean check) { | ||
| this.checkBrokers = check; | ||
| } | ||
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| @Override | ||
| public boolean shouldKeepLeft(ServiceUnitStateData from, ServiceUnitStateData to) { | ||
| ServiceUnitState prevState = from == null ? Free : from.state(); | ||
| ServiceUnitState state = to == null ? Free : to.state(); | ||
| if (!ServiceUnitState.isValidTransition(prevState, state)) { | ||
| return true; | ||
| } | ||
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| if (checkBrokers) { | ||
| if (prevState == Free && (state == Assigned || state == Owned)) { | ||
| // Free -> Assigned || Owned broker check | ||
| return StringUtils.isBlank(to.broker()); | ||
| } else if (prevState == Owned && state == Assigned) { | ||
| // Owned -> Assigned(transfer) broker check | ||
| return !StringUtils.equals(from.broker(), to.sourceBroker()) | ||
| || StringUtils.isBlank(to.broker()) | ||
| || StringUtils.equals(from.broker(), to.broker()); | ||
| } else if (prevState == Assigned && state == Released) { | ||
| // Assigned -> Released(transfer) broker check | ||
| return !StringUtils.equals(from.broker(), to.broker()) | ||
| || !StringUtils.equals(from.sourceBroker(), to.sourceBroker()); | ||
| } else if (prevState == Released && state == Owned) { | ||
| // Released -> Owned(transfer) broker check | ||
| return !StringUtils.equals(from.broker(), to.broker()) | ||
| || !StringUtils.equals(from.sourceBroker(), to.sourceBroker()); | ||
| } else if (prevState == Assigned && state == Owned) { | ||
| // Assigned -> Owned broker check | ||
| return !StringUtils.equals(from.broker(), to.broker()) | ||
| || !StringUtils.equals(from.sourceBroker(), to.sourceBroker()); | ||
| } else if (prevState == Owned && state == Splitting) { | ||
| // Owned -> Splitting broker check | ||
| return !StringUtils.equals(from.broker(), to.broker()); | ||
| } | ||
| } | ||
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| return false; | ||
| } | ||
|
|
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| } |
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