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Added ServiceUnitStateTableViewSyncer
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184 changes: 184 additions & 0 deletions
184
.../apache/pulsar/broker/loadbalance/extensions/channel/ServiceUnitStateTableViewSyncer.java
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| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.pulsar.broker.loadbalance.extensions.channel; | ||
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| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.TimeoutException; | ||
| import lombok.extern.slf4j.Slf4j; | ||
| import org.apache.pulsar.broker.PulsarService; | ||
| import org.apache.pulsar.common.util.FutureUtil; | ||
| import org.apache.pulsar.common.util.ObjectMapperFactory; | ||
|
|
||
| /** | ||
| * Defines ServiceUnitTableViewSyncer. | ||
| * It syncs service unit(bundle) states between metadata store and system topic table views. | ||
| * One could enable this syncer before migration from one to the other and disable it after the migration finishes. | ||
| */ | ||
| @Slf4j | ||
| public class ServiceUnitStateTableViewSyncer implements Cloneable { | ||
| private static final int MAX_CONCURRENT_SYNC_COUNT = 100; | ||
| private volatile ServiceUnitStateTableView systemTopicTableView; | ||
| private volatile ServiceUnitStateTableView metadataStoreTableView; | ||
| private volatile boolean isActive = false; | ||
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| public void start(PulsarService pulsar) | ||
| throws IOException, TimeoutException, InterruptedException, ExecutionException { | ||
| if (!pulsar.getConfiguration().isLoadBalancerServiceUnitTableViewSyncerEnabled()) { | ||
| return; | ||
| } | ||
|
|
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| if (isActive) { | ||
| return; | ||
| } | ||
|
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| try { | ||
| long started = System.currentTimeMillis(); | ||
|
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| if (metadataStoreTableView != null) { | ||
| metadataStoreTableView.close(); | ||
| metadataStoreTableView = null; | ||
| } | ||
| metadataStoreTableView = new ServiceUnitStateMetadataStoreTableViewImpl(); | ||
| metadataStoreTableView.start( | ||
| pulsar, | ||
| this::syncToSystemTopic, | ||
| (k, v) -> {} | ||
| ); | ||
| log.info("Started MetadataStoreTableView"); | ||
|
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| if (systemTopicTableView != null) { | ||
| systemTopicTableView.close(); | ||
| systemTopicTableView = null; | ||
| } | ||
| systemTopicTableView = new ServiceUnitStateTableViewImpl(); | ||
| systemTopicTableView.start( | ||
| pulsar, | ||
| this::syncToMetadataStore, | ||
| (k, v) -> {} | ||
| ); | ||
| log.info("Started SystemTopicTableView"); | ||
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| Map<String, ServiceUnitStateData> merged = new HashMap<>(); | ||
| metadataStoreTableView.entrySet().forEach(e -> merged.put(e.getKey(), e.getValue())); | ||
| systemTopicTableView.entrySet().forEach(e -> merged.put(e.getKey(), e.getValue())); | ||
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| List<CompletableFuture<Void>> futures = new ArrayList<>(); | ||
| var opTimeout = pulsar.getConfiguration().getMetadataStoreOperationTimeoutSeconds(); | ||
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| // Directly use store to sync existing items to metadataStoreTableView(otherwise, they are conflicted out) | ||
| var store = pulsar.getLocalMetadataStore(); | ||
| var writer = ObjectMapperFactory.getMapper().writer(); | ||
| for (var e : merged.entrySet()) { | ||
| futures.add(store.put(ServiceUnitStateMetadataStoreTableViewImpl.PATH_PREFIX + "/" + e.getKey(), | ||
| writer.writeValueAsBytes(e.getValue()), Optional.empty()).thenApply(__ -> null)); | ||
| if (futures.size() == MAX_CONCURRENT_SYNC_COUNT) { | ||
| FutureUtil.waitForAll(futures).get(opTimeout, TimeUnit.SECONDS); | ||
| futures.clear(); | ||
| } | ||
| } | ||
| FutureUtil.waitForAll(futures).get(opTimeout, TimeUnit.SECONDS); | ||
| futures.clear(); | ||
|
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| for (var e : merged.entrySet()) { | ||
| futures.add(syncToSystemTopic(e.getKey(), e.getValue())); | ||
| if (futures.size() == MAX_CONCURRENT_SYNC_COUNT) { | ||
| FutureUtil.waitForAll(futures).get(opTimeout, TimeUnit.SECONDS); | ||
| futures.clear(); | ||
| } | ||
| } | ||
| FutureUtil.waitForAll(futures).get(opTimeout, TimeUnit.SECONDS); | ||
| futures.clear(); | ||
|
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||
| int size = merged.size(); | ||
| int syncTimeout = opTimeout * size; | ||
| while (metadataStoreTableView.entrySet().size() != size || systemTopicTableView.entrySet().size() != size) { | ||
| if (TimeUnit.MILLISECONDS.toSeconds(System.currentTimeMillis() - started) > syncTimeout) { | ||
| throw new TimeoutException( | ||
| "Failed to sync tableviews. MetadataStoreTableView.size: " | ||
| + metadataStoreTableView.entrySet().size() | ||
| + ", SystemTopicTableView.size: " + systemTopicTableView.entrySet().size() + " in " | ||
| + syncTimeout + " secs"); | ||
| } | ||
| Thread.sleep(100); | ||
| } | ||
|
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| log.info("Successfully started ServiceUnitStateTableViewSyncer MetadataStoreTableView.size:{} , " | ||
| + "SystemTopicTableView.size: {} in {} secs", | ||
| metadataStoreTableView.entrySet().size(), systemTopicTableView.entrySet().size(), | ||
| TimeUnit.MILLISECONDS.toSeconds(System.currentTimeMillis() - started)); | ||
| isActive = true; | ||
|
|
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| } catch (Throwable e) { | ||
| log.error("Failed to start ServiceUnitStateTableViewSyncer", e); | ||
| throw e; | ||
| } | ||
| } | ||
|
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| private CompletableFuture<Void> syncToSystemTopic(String key, ServiceUnitStateData data) { | ||
| return systemTopicTableView.put(key, data); | ||
| } | ||
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| private CompletableFuture<Void> syncToMetadataStore(String key, ServiceUnitStateData data) { | ||
| return metadataStoreTableView.put(key, data); | ||
| } | ||
|
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| public void close() throws IOException { | ||
| if (!isActive) { | ||
| return; | ||
| } | ||
|
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| try { | ||
| if (systemTopicTableView != null) { | ||
| systemTopicTableView.close(); | ||
| systemTopicTableView = null; | ||
| log.info("Closed SystemTopicTableView"); | ||
| } | ||
| } catch (Exception e) { | ||
| log.error("Failed to close SystemTopicTableView", e); | ||
| throw e; | ||
| } | ||
|
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| try { | ||
| if (metadataStoreTableView != null) { | ||
| metadataStoreTableView.close(); | ||
| metadataStoreTableView = null; | ||
| log.info("Closed MetadataStoreTableView"); | ||
| } | ||
| } catch (Exception e) { | ||
| log.error("Failed to close MetadataStoreTableView", e); | ||
| throw e; | ||
| } | ||
|
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| log.info("Successfully closed ServiceUnitStateTableViewSyncer."); | ||
| isActive = false; | ||
| } | ||
|
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| public boolean isActive() { | ||
| return isActive; | ||
| } | ||
| } |
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