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121 changes: 121 additions & 0 deletions
121
...r/src/main/java/org/apache/pulsar/broker/loadbalance/extensions/manager/SplitManager.java
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| @@ -0,0 +1,121 @@ | ||
| /* | ||
| * 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.manager; | ||
|
|
||
| import static org.apache.pulsar.broker.loadbalance.extensions.models.SplitDecision.Label.Failure; | ||
| import static org.apache.pulsar.broker.loadbalance.extensions.models.SplitDecision.Reason.Unknown; | ||
| import java.util.Map; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.TimeUnit; | ||
| import lombok.extern.slf4j.Slf4j; | ||
| import org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitState; | ||
| import org.apache.pulsar.broker.loadbalance.extensions.channel.ServiceUnitStateData; | ||
| import org.apache.pulsar.broker.loadbalance.extensions.models.SplitCounter; | ||
| import org.apache.pulsar.broker.loadbalance.extensions.models.SplitDecision; | ||
|
|
||
| /** | ||
| * Split manager. | ||
| */ | ||
| @Slf4j | ||
| public class SplitManager implements StateChangeListener { | ||
|
|
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| record InFlightSplitRequest(SplitDecision splitDecision, CompletableFuture<Void> future) { | ||
| } | ||
|
|
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| private final Map<String, InFlightSplitRequest> inFlightSplitRequests; | ||
|
|
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| private final SplitCounter counter; | ||
|
|
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| public SplitManager(SplitCounter splitCounter) { | ||
| this.inFlightSplitRequests = new ConcurrentHashMap<>(); | ||
| this.counter = splitCounter; | ||
| } | ||
|
|
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| private void complete(String serviceUnit, Throwable ex) { | ||
| inFlightSplitRequests.computeIfPresent(serviceUnit, (__, inFlightSplitRequest) -> { | ||
| var future = inFlightSplitRequest.future; | ||
| if (!future.isDone()) { | ||
| if (ex != null) { | ||
| counter.update(Failure, Unknown); | ||
| future.completeExceptionally(ex); | ||
| if (log.isDebugEnabled()) { | ||
| log.debug("Complete exceptionally split bundle: {}", serviceUnit, ex); | ||
| } | ||
| } else { | ||
| counter.update(inFlightSplitRequest.splitDecision); | ||
| future.complete(null); | ||
| if (log.isDebugEnabled()) { | ||
| log.debug("Complete split bundle: {}", serviceUnit); | ||
| } | ||
| } | ||
| } | ||
| return null; | ||
| }); | ||
| } | ||
|
|
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| public CompletableFuture<Void> waitAsync(CompletableFuture<Void> eventPubFuture, | ||
| String bundle, | ||
| SplitDecision decision, | ||
| long timeout, | ||
| TimeUnit timeoutUnit) { | ||
|
|
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| return eventPubFuture.thenCompose(__ -> inFlightSplitRequests.computeIfAbsent(bundle, ignore -> { | ||
| if (log.isDebugEnabled()) { | ||
| log.debug("Handle split bundle: {}, timeout: {} {}", bundle, timeout, timeoutUnit); | ||
| } | ||
| CompletableFuture<Void> future = new CompletableFuture<>(); | ||
| future.orTimeout(timeout, timeoutUnit).whenComplete((v, ex) -> { | ||
| if (ex != null) { | ||
| inFlightSplitRequests.remove(bundle); | ||
| log.warn("Failed to wait for split for serviceUnit: {}", bundle, ex); | ||
| } | ||
| }); | ||
| return new InFlightSplitRequest(decision, future); | ||
| }).future); | ||
| } | ||
|
|
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| @Override | ||
| public void handleEvent(String serviceUnit, ServiceUnitStateData data, Throwable t) { | ||
| ServiceUnitState state = ServiceUnitStateData.state(data); | ||
| if (t != null && inFlightSplitRequests.containsKey(serviceUnit)) { | ||
| this.complete(serviceUnit, t); | ||
| return; | ||
| } | ||
| switch (state) { | ||
| case Deleted, Owned, Init -> this.complete(serviceUnit, t); | ||
| default -> { | ||
| if (log.isDebugEnabled()) { | ||
| log.debug("Handling {} for service unit {}", data, serviceUnit); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| public void close() { | ||
| inFlightSplitRequests.forEach((bundle, inFlightSplitRequest) -> { | ||
| if (!inFlightSplitRequest.future.isDone()) { | ||
| String msg = String.format("Splitting bundle: %s, but the manager already closed.", bundle); | ||
| log.warn(msg); | ||
| inFlightSplitRequest.future.completeExceptionally(new IllegalStateException(msg)); | ||
| } | ||
| }); | ||
| inFlightSplitRequests.clear(); | ||
| } | ||
| } |
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