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move watcher management logic to a manager class
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d2/src/main/java/com/linkedin/d2/jmx/D2ClientJmxDualReadModeWatcherManager.java
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| /* | ||
| Copyright (c) 2023 LinkedIn Corp. | ||
| Licensed 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 com.linkedin.d2.jmx; | ||
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| import com.google.common.annotations.VisibleForTesting; | ||
| import com.linkedin.d2.balancer.LoadBalancerStateItem; | ||
| import com.linkedin.d2.balancer.dualread.DualReadStateManager; | ||
| import com.linkedin.d2.balancer.properties.ClusterProperties; | ||
| import com.linkedin.d2.balancer.properties.ServiceProperties; | ||
| import com.linkedin.d2.balancer.properties.UriProperties; | ||
| import com.linkedin.d2.balancer.simple.ClusterInfoItem; | ||
| import com.linkedin.d2.balancer.simple.SimpleLoadBalancer; | ||
| import com.linkedin.d2.balancer.simple.SimpleLoadBalancerState; | ||
| import com.linkedin.d2.balancer.strategies.LoadBalancerStrategy; | ||
| import com.linkedin.d2.discovery.stores.file.FileStore; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.ConcurrentMap; | ||
| import java.util.function.Consumer; | ||
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| public class D2ClientJmxDualReadModeWatcherManager { | ||
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| private final DualReadStateManager _dualReadStateManager; | ||
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| private D2ClientJmxDualReadModeWatcher<SimpleLoadBalancer> _lbDualReadModeWatcher; | ||
| private D2ClientJmxDualReadModeWatcher<SimpleLoadBalancerState> _lbStateDualReadModeWatcher; | ||
| private D2ClientJmxDualReadModeWatcher<FileStore<UriProperties>> _fileStoreUriPropertiesDualReadModeWatcher; | ||
| private D2ClientJmxDualReadModeWatcher<FileStore<ClusterProperties>> _fileStoreClusterPropertiesDualReadModeWatcher; | ||
| private D2ClientJmxDualReadModeWatcher<FileStore<ServiceProperties>> _fileStoreServicePropertiesDualReadModeWatcher; | ||
| private final ConcurrentMap<String, D2ClientJmxDualReadModeWatcher<LoadBalancerStateItem<ServiceProperties>>> | ||
| _servicePropertiesDualReadModeWatchers; | ||
| private final ConcurrentMap<String, D2ClientJmxDualReadModeWatcher<LoadBalancerStrategy>> _lbStrategyDualReadModeWatchers; | ||
| private final ConcurrentMap<String, D2ClientJmxDualReadModeWatcher<ClusterInfoItem>> _clusterInfoDualReadModeWatchers; | ||
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| public D2ClientJmxDualReadModeWatcherManager(DualReadStateManager dualReadStateManager) | ||
| { | ||
| _dualReadStateManager = dualReadStateManager; | ||
| _lbDualReadModeWatcher = null; | ||
| _lbStateDualReadModeWatcher = null; | ||
| _fileStoreUriPropertiesDualReadModeWatcher = null; | ||
| _fileStoreClusterPropertiesDualReadModeWatcher = null; | ||
| _fileStoreServicePropertiesDualReadModeWatcher = null; | ||
| _servicePropertiesDualReadModeWatchers = new ConcurrentHashMap<>(); | ||
| _lbStrategyDualReadModeWatchers = new ConcurrentHashMap<>(); | ||
| _clusterInfoDualReadModeWatchers = new ConcurrentHashMap<>(); | ||
| } | ||
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| public void updateWatcher(SimpleLoadBalancer balancer, Consumer<SimpleLoadBalancer> callback) | ||
| { | ||
| if (_dualReadStateManager != null) | ||
| { | ||
| if (_lbDualReadModeWatcher == null) | ||
| { | ||
| _lbDualReadModeWatcher = new D2ClientJmxDualReadModeWatcher<>(balancer, callback); | ||
| _dualReadStateManager.addGlobalWatcher(_lbDualReadModeWatcher); | ||
| } | ||
| _lbDualReadModeWatcher.setLatestJmxProperty(balancer); | ||
| } | ||
| } | ||
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| public void updateWatcher(SimpleLoadBalancerState state, Consumer<SimpleLoadBalancerState> callback) | ||
| { | ||
| if (_dualReadStateManager != null) | ||
| { | ||
| if (_lbStateDualReadModeWatcher == null) | ||
| { | ||
| _lbStateDualReadModeWatcher = new D2ClientJmxDualReadModeWatcher<>(state, callback); | ||
| _dualReadStateManager.addGlobalWatcher(_lbStateDualReadModeWatcher); | ||
| } | ||
| _lbStateDualReadModeWatcher.setLatestJmxProperty(state); | ||
| } | ||
| } | ||
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| public void updateWatcher(String serviceName, String scheme, LoadBalancerStrategy strategy, Consumer<LoadBalancerStrategy> callback) | ||
| { | ||
| if (_dualReadStateManager != null) | ||
| { | ||
| D2ClientJmxDualReadModeWatcher<LoadBalancerStrategy> currentWatcher = | ||
| _lbStrategyDualReadModeWatchers.computeIfAbsent(getWatcherNameForLoadBalancerStrategy(serviceName, scheme), k -> | ||
| { | ||
| D2ClientJmxDualReadModeWatcher<LoadBalancerStrategy> watcher = new D2ClientJmxDualReadModeWatcher<>(strategy, callback); | ||
| _dualReadStateManager.addServiceWatcher(serviceName, watcher); | ||
| return watcher; | ||
| }); | ||
| currentWatcher.setLatestJmxProperty(strategy); | ||
| } | ||
| } | ||
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| public void updateWatcher(String clusterName, ClusterInfoItem clusterInfoItem, Consumer<ClusterInfoItem> callback) | ||
| { | ||
| if (_dualReadStateManager != null) | ||
| { | ||
| D2ClientJmxDualReadModeWatcher<ClusterInfoItem> currentWatcher = | ||
| _clusterInfoDualReadModeWatchers.computeIfAbsent(clusterName, k -> | ||
| { | ||
| D2ClientJmxDualReadModeWatcher<ClusterInfoItem> watcher = new D2ClientJmxDualReadModeWatcher<>(clusterInfoItem, callback); | ||
| _dualReadStateManager.addClusterWatcher(clusterName, watcher); | ||
| return watcher; | ||
| }); | ||
| currentWatcher.setLatestJmxProperty(clusterInfoItem); | ||
| } | ||
| } | ||
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| public void updateWatcher(String serviceName, LoadBalancerStateItem<ServiceProperties> serviceProperties, | ||
| Consumer<LoadBalancerStateItem<ServiceProperties>> callback) | ||
| { | ||
| if (_dualReadStateManager != null) | ||
| { | ||
| D2ClientJmxDualReadModeWatcher<LoadBalancerStateItem<ServiceProperties>> currentWatcher = | ||
| _servicePropertiesDualReadModeWatchers.computeIfAbsent(serviceName, k -> | ||
| { | ||
| D2ClientJmxDualReadModeWatcher<LoadBalancerStateItem<ServiceProperties>> watcher = | ||
| new D2ClientJmxDualReadModeWatcher<>(serviceProperties, callback); | ||
| _dualReadStateManager.addServiceWatcher(serviceName, watcher); | ||
| return watcher; | ||
| }); | ||
| currentWatcher.setLatestJmxProperty(serviceProperties); | ||
| } | ||
| } | ||
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| public void updateWatcherForFileStoreUriProperties(FileStore<UriProperties> uriStore, Consumer<FileStore<UriProperties>> callback) | ||
| { | ||
| if (_dualReadStateManager != null) | ||
| { | ||
| if (_fileStoreUriPropertiesDualReadModeWatcher == null) | ||
| { | ||
| _fileStoreUriPropertiesDualReadModeWatcher = new D2ClientJmxDualReadModeWatcher<>(uriStore, callback); | ||
| _dualReadStateManager.addGlobalWatcher(_fileStoreUriPropertiesDualReadModeWatcher); | ||
| } | ||
| _fileStoreUriPropertiesDualReadModeWatcher.setLatestJmxProperty(uriStore); | ||
| } | ||
| } | ||
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| public void updateWatcherForFileStoreClusterProperties(FileStore<ClusterProperties> clusterStore, Consumer<FileStore<ClusterProperties>> callback) | ||
| { | ||
| if (_dualReadStateManager != null) | ||
| { | ||
| if (_fileStoreClusterPropertiesDualReadModeWatcher == null) | ||
| { | ||
| _fileStoreClusterPropertiesDualReadModeWatcher = new D2ClientJmxDualReadModeWatcher<>(clusterStore, callback); | ||
| _dualReadStateManager.addGlobalWatcher(_fileStoreClusterPropertiesDualReadModeWatcher); | ||
| } | ||
| _fileStoreClusterPropertiesDualReadModeWatcher.setLatestJmxProperty(clusterStore); | ||
| } | ||
| } | ||
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| public void updateWatcherForFileStoreServiceProperties(FileStore<ServiceProperties> serviceStore, Consumer<FileStore<ServiceProperties>> callback) | ||
| { | ||
| if (_dualReadStateManager != null) | ||
| { | ||
| if (_fileStoreServicePropertiesDualReadModeWatcher == null) | ||
| { | ||
| _fileStoreServicePropertiesDualReadModeWatcher = new D2ClientJmxDualReadModeWatcher<>(serviceStore, callback); | ||
| _dualReadStateManager.addGlobalWatcher(_fileStoreServicePropertiesDualReadModeWatcher); | ||
| } | ||
| _fileStoreServicePropertiesDualReadModeWatcher.setLatestJmxProperty(serviceStore); | ||
| } | ||
| } | ||
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| public void removeWatcherForLoadBalancerStrategy(String serviceName, String scheme) | ||
| { | ||
| DualReadStateManager.DualReadModeWatcher watcher = _lbStrategyDualReadModeWatchers.remove(getWatcherNameForLoadBalancerStrategy(serviceName, scheme)); | ||
| if (_dualReadStateManager != null && watcher != null) | ||
| { | ||
| _dualReadStateManager.removeServiceWatcher(serviceName, watcher); | ||
| } | ||
| } | ||
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| public void removeWatcherForClusterInfoItem(String clusterName) | ||
| { | ||
| DualReadStateManager.DualReadModeWatcher watcher = _clusterInfoDualReadModeWatchers.remove(clusterName); | ||
| if (_dualReadStateManager != null && watcher != null) | ||
| { | ||
| _dualReadStateManager.removeClusterWatcher(clusterName, watcher); | ||
| } | ||
| } | ||
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| public void removeWatcherForServiceProperties(String serviceName) | ||
| { | ||
| DualReadStateManager.DualReadModeWatcher watcher = _servicePropertiesDualReadModeWatchers.remove(serviceName); | ||
| if (_dualReadStateManager != null && watcher != null) | ||
| { | ||
| _dualReadStateManager.removeServiceWatcher(serviceName, watcher); | ||
| } | ||
| } | ||
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| private String getWatcherNameForLoadBalancerStrategy(String serviceName, String scheme) | ||
| { | ||
| return String.format("%s-%s", serviceName, scheme); | ||
| } | ||
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| public static final class D2ClientJmxDualReadModeWatcher<T> implements DualReadStateManager.DualReadModeWatcher | ||
| { | ||
| private T _latestJmxProperty; | ||
| private final Consumer<T> _callback; | ||
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| D2ClientJmxDualReadModeWatcher(T initialJmxProperty, Consumer<T> callback) | ||
| { | ||
| _latestJmxProperty = initialJmxProperty; | ||
| _callback = callback; | ||
| } | ||
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| @VisibleForTesting | ||
| T getLatestJmxProperty() | ||
| { | ||
| return _latestJmxProperty; | ||
| } | ||
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| public void setLatestJmxProperty(T latestJmxProperty) | ||
| { | ||
| _latestJmxProperty = latestJmxProperty; | ||
| } | ||
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| @Override | ||
| public void onChanged() | ||
| { | ||
| _callback.accept(_latestJmxProperty); | ||
| } | ||
| } | ||
| } |
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