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Merge pull request #231 from yavor300/add-reactive-resilience4j-bulkh…
…ead-provider Add support for reactive Resilience4jBulkheadProvider to provide bulkhead support for reactive operations (Mono and Flux).
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104 changes: 104 additions & 0 deletions
104
...ringframework/cloud/circuitbreaker/resilience4j/ReactiveResilience4jBulkheadProvider.java
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| * Copyright 2013-2021 the original author or authors. | ||
| * | ||
| * 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 | ||
| * | ||
| * https://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.springframework.cloud.circuitbreaker.resilience4j; | ||
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| import java.util.Map; | ||
| import java.util.Optional; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.function.Consumer; | ||
| import java.util.function.Function; | ||
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| import io.github.resilience4j.bulkhead.Bulkhead; | ||
| import io.github.resilience4j.bulkhead.BulkheadConfig; | ||
| import io.github.resilience4j.bulkhead.BulkheadRegistry; | ||
| import io.github.resilience4j.reactor.bulkhead.operator.BulkheadOperator; | ||
| import reactor.core.publisher.Flux; | ||
| import reactor.core.publisher.Mono; | ||
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| import org.springframework.lang.NonNull; | ||
| import org.springframework.util.Assert; | ||
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| /** | ||
| * @author Yavor Chamov | ||
| */ | ||
| public class ReactiveResilience4jBulkheadProvider { | ||
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| private final BulkheadRegistry bulkheadRegistry; | ||
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| private final ConcurrentHashMap<String, Resilience4jBulkheadConfigurationBuilder.BulkheadConfiguration> | ||
| configurations = new ConcurrentHashMap<>(); | ||
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| private Function<String, Resilience4jBulkheadConfigurationBuilder.BulkheadConfiguration> defaultConfiguration; | ||
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| public ReactiveResilience4jBulkheadProvider(BulkheadRegistry bulkheadRegistry) { | ||
| this.bulkheadRegistry = bulkheadRegistry; | ||
| this.defaultConfiguration = id -> new Resilience4jBulkheadConfigurationBuilder() | ||
| .bulkheadConfig(this.bulkheadRegistry.getDefaultConfig()) | ||
| .build(); | ||
| } | ||
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| public void configureDefault( | ||
| @NonNull Function<String, Resilience4jBulkheadConfigurationBuilder.BulkheadConfiguration> defaultConfiguration) { | ||
| Assert.notNull(defaultConfiguration, "Default configuration must not be null"); | ||
| this.defaultConfiguration = defaultConfiguration; | ||
| } | ||
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| public void configure(Consumer<Resilience4jBulkheadConfigurationBuilder> consumer, String... ids) { | ||
| for (String id : ids) { | ||
| Resilience4jBulkheadConfigurationBuilder builder = new Resilience4jBulkheadConfigurationBuilder(); | ||
| consumer.accept(builder); | ||
| Resilience4jBulkheadConfigurationBuilder.BulkheadConfiguration configuration = builder.build(); | ||
| configurations.put(id, configuration); | ||
| } | ||
| } | ||
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| public void addBulkheadCustomizer(Consumer<Bulkhead> customizer, String... ids) { | ||
| for (String id : ids) { | ||
| Resilience4jBulkheadConfigurationBuilder.BulkheadConfiguration configuration = configurations | ||
| .computeIfAbsent(id, defaultConfiguration); | ||
| Bulkhead bulkhead = bulkheadRegistry.bulkhead(id, configuration.getBulkheadConfig()); | ||
| customizer.accept(bulkhead); | ||
| } | ||
| } | ||
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| public BulkheadRegistry getBulkheadRegistry() { | ||
| return bulkheadRegistry; | ||
| } | ||
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| public <T> Mono<T> decorateMono(String id, Map<String, String> tags, Mono<T> mono) { | ||
| Resilience4jBulkheadConfigurationBuilder.BulkheadConfiguration configuration = configurations | ||
| .computeIfAbsent(id, this::getConfiguration); | ||
| Bulkhead bulkhead = bulkheadRegistry.bulkhead(id, configuration.getBulkheadConfig(), tags); | ||
| return mono.transformDeferred(BulkheadOperator.of(bulkhead)); | ||
| } | ||
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| public <T> Flux<T> decorateFlux(String id, Map<String, String> tags, Flux<T> flux) { | ||
| Resilience4jBulkheadConfigurationBuilder.BulkheadConfiguration configuration = configurations | ||
| .computeIfAbsent(id, this::getConfiguration); | ||
| Bulkhead bulkhead = bulkheadRegistry.bulkhead(id, configuration.getBulkheadConfig(), tags); | ||
| return flux.transformDeferred(BulkheadOperator.of(bulkhead)); | ||
| } | ||
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| private Resilience4jBulkheadConfigurationBuilder.BulkheadConfiguration getConfiguration(String id) { | ||
| Resilience4jBulkheadConfigurationBuilder builder = new Resilience4jBulkheadConfigurationBuilder(); | ||
| Resilience4jBulkheadConfigurationBuilder.BulkheadConfiguration defaultConfiguration = | ||
| this.defaultConfiguration.apply(id); | ||
| Optional<BulkheadConfig> bulkheadConfiguration = bulkheadRegistry.getConfiguration(id); | ||
| builder.bulkheadConfig(bulkheadConfiguration.orElse(defaultConfiguration.getBulkheadConfig())); | ||
| return builder.build(); | ||
| } | ||
| } |
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