io.github.resilience4j.circuitbreaker.configure.CircuitBreakerConfiguration Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of resilience4j-spring Show documentation

Resilience4j is a lightweight, easy-to-use fault tolerance library designed for Java8 and functional programming

There is a newer version: 2.2.0

/*
 * Copyright 2017 Robert Winkler
 *
 * 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.
 */
package io.github.resilience4j.circuitbreaker.configure;

import io.github.resilience4j.circuitbreaker.CircuitBreaker;
import io.github.resilience4j.circuitbreaker.CircuitBreakerConfig;
import io.github.resilience4j.circuitbreaker.CircuitBreakerRegistry;
import io.github.resilience4j.circuitbreaker.event.CircuitBreakerEvent;
import io.github.resilience4j.circuitbreaker.internal.InMemoryCircuitBreakerRegistry;
import io.github.resilience4j.consumer.DefaultEventConsumerRegistry;
import io.github.resilience4j.consumer.EventConsumerRegistry;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * {@link org.springframework.context.annotation.Configuration
 * Configuration} for resilience4j-circuitbreaker.
 */
@Configuration
public class CircuitBreakerConfiguration {

    @Bean
    public CircuitBreakerRegistry circuitBreakerRegistry(CircuitBreakerConfigurationProperties circuitBreakerProperties,
                                                         EventConsumerRegistry eventConsumerRegistry) {
        CircuitBreakerRegistry circuitBreakerRegistry = new InMemoryCircuitBreakerRegistry();
        circuitBreakerProperties.getBackends().forEach(
                (name, properties) -> {
                    CircuitBreakerConfig circuitBreakerConfig = circuitBreakerProperties.createCircuitBreakerConfig(name);
                    CircuitBreaker circuitBreaker = circuitBreakerRegistry.circuitBreaker(name, circuitBreakerConfig);
                    circuitBreaker.getEventPublisher().onEvent(eventConsumerRegistry.createEventConsumer(name, properties.getEventConsumerBufferSize()));
                }
        );
        return circuitBreakerRegistry;
    }

    @Bean
    public CircuitBreakerAspect circuitBreakerAspect(CircuitBreakerConfigurationProperties circuitBreakerProperties,
                                                     CircuitBreakerRegistry circuitBreakerRegistry) {
        return new CircuitBreakerAspect(circuitBreakerProperties, circuitBreakerRegistry);
    }

    /**
     * The EventConsumerRegistry is used to manage EventConsumer instances.
     * The EventConsumerRegistry is used by the CircuitBreakerHealthIndicator to show the latest CircuitBreakerEvents events
     * for each CircuitBreaker instance.
     * @return a default EventConsumerRegistry {@link io.github.resilience4j.consumer.DefaultEventConsumerRegistry}
     */
    @Bean
    public EventConsumerRegistry eventConsumerRegistry() {
        return new DefaultEventConsumerRegistry<>();
    }
}