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

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/*
 * Copyright 2019 Kyuhyen Hwang
 *
 * 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.fallback.autoconfigure;

import io.github.resilience4j.fallback.*;
import io.github.resilience4j.fallback.configure.FallbackConfiguration;
import io.github.resilience4j.utils.ReactorOnClasspathCondition;
import io.github.resilience4j.utils.RxJava2OnClasspathCondition;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Conditional;
import org.springframework.context.annotation.Configuration;

import java.util.List;

/**
 * {@link Configuration} for {@link FallbackDecorators}.
 */
@Configuration
public class FallbackConfigurationOnMissingBean {

    private final FallbackConfiguration fallbackConfiguration;

    public FallbackConfigurationOnMissingBean() {
        this.fallbackConfiguration = new FallbackConfiguration();
    }

    @Bean
    @ConditionalOnMissingBean
    public FallbackDecorators fallbackDecorators(@Autowired(required = false) List fallbackDecorators) {
        return fallbackConfiguration.fallbackDecorators(fallbackDecorators);
    }

    @Bean
    @Conditional(value = {RxJava2OnClasspathCondition.class})
    @ConditionalOnMissingBean
    public RxJava2FallbackDecorator rxJava2FallbackDecorator() {
        return fallbackConfiguration.rxJava2FallbackDecorator();
    }

    @Bean
    @Conditional(value = {ReactorOnClasspathCondition.class})
    @ConditionalOnMissingBean
    public ReactorFallbackDecorator reactorFallbackDecorator() {
        return fallbackConfiguration.reactorFallbackDecorator();
    }

    @Bean
    @ConditionalOnMissingBean
    public CompletionStageFallbackDecorator completionStageFallbackDecorator() {
        return fallbackConfiguration.completionStageFallbackDecorator();
    }
}