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Extensions to integrate Micronaut and Spring
There is a newer version: 2.0.1
/*
 * Copyright 2017-2019 original 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
 *
 * 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.micronaut.spring.beans;

import io.micronaut.context.DefaultApplicationContext;
import io.micronaut.context.DefaultBeanContext;
import io.micronaut.context.Qualifier;
import io.micronaut.context.env.DefaultEnvironment;
import io.micronaut.core.convert.ArgumentConversionContext;
import io.micronaut.inject.qualifiers.Qualifiers;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.context.EnvironmentAware;
import org.springframework.core.env.Environment;

import javax.annotation.Nullable;
import java.lang.annotation.Annotation;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;

/**
 * Adds Micronaut beans to a Spring application context.  This processor will
 * find all of the Micronaut beans of the specified types
 * and add them as beans to the Spring application context.
 *
 * @author jeffbrown
 * @since 1.0
 */
public class MicronautBeanProcessor implements BeanFactoryPostProcessor, DisposableBean, EnvironmentAware {

    private static final String MICRONAUT_BEAN_TYPE_PROPERTY_NAME = "micronautBeanType";
    private static final String MICRONAUT_CONTEXT_PROPERTY_NAME = "micronautContext";
    private static final String MICRONAUT_SINGLETON_PROPERTY_NAME = "micronautSingleton";

    protected DefaultBeanContext micronautContext;
    protected final List> micronautBeanQualifierTypes;
    private Environment environment;

    /**
     *
     * @param qualifierTypes The types associated with the
     *                   Micronaut beans which should be added to the
     *                   Spring application context.
     */
    public MicronautBeanProcessor(Class... qualifierTypes) {
        this.micronautBeanQualifierTypes = Arrays.asList(qualifierTypes);
    }

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        if (environment != null) {
            micronautContext = new DefaultApplicationContext(environment.getActiveProfiles()) {
                DefaultEnvironment env = new DefaultEnvironment(environment.getActiveProfiles()) {
                    @Override
                    public io.micronaut.context.env.Environment start() {
                        return this;
                    }

                    @Override
                    public io.micronaut.context.env.Environment stop() {
                        return this;
                    }

                    @Override
                    public boolean containsProperty(@Nullable String name) {
                        return environment.containsProperty(name);
                    }

                    @Override
                    public boolean containsProperties(@Nullable String name) {
                        return environment.containsProperty(name);
                    }

                    @Override
                    public  Optional getProperty(@Nullable String name, ArgumentConversionContext conversionContext) {
                        return Optional.ofNullable(environment.getProperty(name, conversionContext.getArgument().getType()));
                    }
                };

                @Override
                public io.micronaut.context.env.Environment getEnvironment() {
                    return env;
                }
            };
        } else {
            micronautContext = new DefaultApplicationContext();
        }
        micronautContext.start();

        micronautBeanQualifierTypes
                .forEach(micronautBeanQualifierType -> {
            Qualifier