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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 2020 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.spelresolver.autoconfigure;

import io.github.resilience4j.spelresolver.SpelResolver;
import io.github.resilience4j.spelresolver.configure.SpelResolverConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.ParameterNameDiscoverer;
import org.springframework.expression.spel.standard.SpelExpressionParser;

/**
 * {@link Configuration} for {@link SpelResolver}.
 */
@Configuration
public class SpelResolverConfigurationOnMissingBean {
    private final SpelResolverConfiguration configuration;

    public SpelResolverConfigurationOnMissingBean() {
        this.configuration = new SpelResolverConfiguration();
    }

    @Bean
    @ConditionalOnMissingBean
    public ParameterNameDiscoverer parameterNameDiscoverer() {
        return configuration.parameterNameDiscoverer();
    }

    @Bean
    @ConditionalOnMissingBean
    public SpelExpressionParser spelExpressionParser() {
        return configuration.spelExpressionParser();
    }

    @Bean
    @ConditionalOnMissingBean
    public SpelResolver spelResolver(SpelExpressionParser spelExpressionParser, ParameterNameDiscoverer parameterNameDiscoverer) {
        return configuration.spelResolver(spelExpressionParser, parameterNameDiscoverer);
    }
}