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[PIP-82] [pulsar-broker] Add resource-group configuration listener. (a…
…pache#10657) * Add resource-group configuration listener. * Fix ResourceGroupServiceTest unit test. * Incorporate review feedback. * Added javadoc comments. Co-authored-by: Bharani Chadalavada <[email protected]>
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...-broker/src/main/java/org/apache/pulsar/broker/resourcegroup/ResourceGroupConfigInfo.java
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...ker/src/main/java/org/apache/pulsar/broker/resourcegroup/ResourceGroupConfigListener.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. | ||
| */ | ||
| package org.apache.pulsar.broker.resourcegroup; | ||
|
|
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| import static org.apache.pulsar.broker.cache.ConfigurationCacheService.RESOURCEGROUPS; | ||
| import static org.apache.pulsar.common.policies.path.PolicyPath.path; | ||
| import com.google.common.collect.Sets; | ||
| import java.util.HashSet; | ||
| import java.util.Set; | ||
| import java.util.function.Consumer; | ||
| import org.apache.pulsar.broker.PulsarService; | ||
| import org.apache.pulsar.broker.resources.ResourceGroupResources; | ||
| import org.apache.pulsar.client.admin.PulsarAdminException; | ||
| import org.apache.pulsar.common.policies.data.ResourceGroup; | ||
| import org.apache.pulsar.metadata.api.Notification; | ||
| import org.apache.pulsar.metadata.api.NotificationType; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| /** | ||
| * Resource Group Config Listener | ||
| * | ||
| * <P>Meta data store listener of updates to resource group config. | ||
| * <P>Listens to resource group configuration changes and updates internal datastructures. | ||
| * | ||
| * @see <a href="https://github.com/apache/pulsar/wiki/PIP-82%3A-Tenant-and-namespace-level-rate-limiting">Global-quotas</a> | ||
| * | ||
| */ | ||
| public class ResourceGroupConfigListener implements Consumer<Notification> { | ||
|
|
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| private static final Logger LOG = LoggerFactory.getLogger(ResourceGroupConfigListener.class); | ||
| private final ResourceGroupService rgService; | ||
| private final PulsarService pulsarService; | ||
| private final ResourceGroupResources rgResources; | ||
| private final ResourceGroupNamespaceConfigListener rgNamespaceConfigListener; | ||
|
|
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| public ResourceGroupConfigListener(ResourceGroupService rgService, PulsarService pulsarService) { | ||
| this.rgService = rgService; | ||
| this.pulsarService = pulsarService; | ||
| this.rgResources = pulsarService.getPulsarResources().getResourcegroupResources(); | ||
| loadAllResourceGroups(); | ||
| this.rgResources.getStore().registerListener(this); | ||
| rgNamespaceConfigListener = new ResourceGroupNamespaceConfigListener( | ||
| rgService, pulsarService, this); | ||
| } | ||
|
|
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| private void loadAllResourceGroups() { | ||
| rgResources.getChildrenAsync(path(RESOURCEGROUPS)).whenCompleteAsync((rgList, ex) -> { | ||
| if (ex != null) { | ||
| LOG.error("Exception when fetching resource groups", ex); | ||
| return; | ||
| } | ||
| final Set<String> existingSet = rgService.resourceGroupGetAll(); | ||
| HashSet<String> newSet = new HashSet<>(); | ||
|
|
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| for (String rgName : rgList) { | ||
| newSet.add(rgName); | ||
| } | ||
|
|
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| final Sets.SetView<String> deleteList = Sets.difference(existingSet, newSet); | ||
|
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| for (String rgName: deleteList) { | ||
| deleteResourceGroup(rgName); | ||
| } | ||
|
|
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| final Sets.SetView<String> addList = Sets.difference(newSet, existingSet); | ||
| for (String rgName: addList) { | ||
| final String resourceGroupPath = path(RESOURCEGROUPS, rgName); | ||
| pulsarService.getPulsarResources().getResourcegroupResources() | ||
| .getAsync(resourceGroupPath).thenAcceptAsync((optionalRg) -> { | ||
| ResourceGroup rg = optionalRg.get(); | ||
| createResourceGroup(rgName, rg); | ||
| }).exceptionally((ex1) -> { | ||
| LOG.error("Failed to fetch resourceGroup", ex1); | ||
| return null; | ||
| }); | ||
| } | ||
| }); | ||
| } | ||
|
|
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| public synchronized void deleteResourceGroup(String rgName) { | ||
| try { | ||
| if (rgService.resourceGroupGet(rgName) != null) { | ||
| LOG.info("Deleting resource group {}", rgName); | ||
| rgService.resourceGroupDelete(rgName); | ||
| } | ||
| } catch (PulsarAdminException e) { | ||
| LOG.error("Got exception while deleting resource group {}, {}", rgName, e); | ||
| } | ||
| } | ||
|
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| public synchronized void createResourceGroup(String rgName, ResourceGroup rg) { | ||
| if (rgService.resourceGroupGet(rgName) == null) { | ||
| LOG.info("Creating resource group {}, {}", rgName, rg.toString()); | ||
| try { | ||
| rgService.resourceGroupCreate(rgName, rg); | ||
| } catch (PulsarAdminException ex1) { | ||
| LOG.error("Got an exception while creating RG {}", rgName, ex1); | ||
| } | ||
| } | ||
| } | ||
|
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| private void updateResourceGroup(String notifyPath) { | ||
| String rgName = notifyPath.substring(notifyPath.lastIndexOf('/') + 1); | ||
|
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| rgResources.getAsync(notifyPath).whenComplete((optionalRg, ex) -> { | ||
| if (ex != null) { | ||
| LOG.error("Exception when getting resource group {}", rgName, ex); | ||
| return; | ||
| } | ||
| ResourceGroup rg = optionalRg.get(); | ||
| try { | ||
| LOG.info("Updating resource group {}, {}", rgName, rg.toString()); | ||
| rgService.resourceGroupUpdate(rgName, rg); | ||
| } catch (PulsarAdminException ex1) { | ||
| LOG.error("Got an exception while creating resource group {}", rgName, ex1); | ||
| } | ||
| }); | ||
| } | ||
|
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| @Override | ||
| public void accept(Notification notification) { | ||
| String notifyPath = notification.getPath(); | ||
|
|
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| if (!notifyPath.startsWith(path(RESOURCEGROUPS))) { | ||
| return; | ||
| } | ||
| LOG.info("Metadata store notification: Path {}, Type {}", notifyPath, notification.getType()); | ||
|
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| String rgName = notifyPath.substring(notifyPath.lastIndexOf('/') + 1); | ||
| if (notification.getType() == NotificationType.ChildrenChanged) { | ||
| loadAllResourceGroups(); | ||
| } else if (!RESOURCEGROUPS.equals(rgName)) { | ||
| switch (notification.getType()) { | ||
| case Modified: | ||
| updateResourceGroup(notifyPath); | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| } | ||
| } | ||
| } |
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