org.springframework.integration.config.PublisherRegistrar.java Source code

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Here is the source code for org.springframework.integration.config.PublisherRegistrar.java

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/*
 * Copyright 2014-2019 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.
 */

package org.springframework.integration.config;

import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.beans.MutablePropertyValues;
import org.springframework.beans.PropertyValue;
import org.springframework.beans.factory.BeanDefinitionStoreException;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.context.annotation.ImportBeanDefinitionRegistrar;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.integration.aop.PublisherAnnotationBeanPostProcessor;
import org.springframework.integration.context.IntegrationContextUtils;
import org.springframework.util.StringUtils;

/**
 * @author Artem Bilan
 * @author Gary Russell
 *
 * @since 4.0
 */
public class PublisherRegistrar implements ImportBeanDefinitionRegistrar {

    private static final Log logger = LogFactory.getLog(PublisherRegistrar.class);

    @Override
    public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata,
            BeanDefinitionRegistry registry) {
        Map<String, Object> annotationAttributes = importingClassMetadata
                .getAnnotationAttributes(EnablePublisher.class.getName());

        String defaultChannel = annotationAttributes == null
                ? (String) AnnotationUtils.getDefaultValue(EnablePublisher.class)
                : (String) annotationAttributes.get("defaultChannel");
        if (!registry.containsBeanDefinition(IntegrationContextUtils.PUBLISHER_ANNOTATION_POSTPROCESSOR_NAME)) {
            BeanDefinitionBuilder builder = BeanDefinitionBuilder
                    .genericBeanDefinition(PublisherAnnotationBeanPostProcessor.class)
                    .setRole(BeanDefinition.ROLE_INFRASTRUCTURE);

            if (StringUtils.hasText(defaultChannel)) {
                builder.addPropertyValue("defaultChannelName", defaultChannel);
                if (logger.isInfoEnabled()) {
                    logger.info("Setting '@Publisher' default-output-channel to '" + defaultChannel + "'.");
                }
            }

            if (annotationAttributes != null) {
                Object proxyTargetClass = annotationAttributes.get("proxyTargetClass");
                builder.addPropertyValue("proxyTargetClass", proxyTargetClass);
                Object order = annotationAttributes.get("order");
                builder.addPropertyValue("order", order);
            }
            registry.registerBeanDefinition(IntegrationContextUtils.PUBLISHER_ANNOTATION_POSTPROCESSOR_NAME,
                    builder.getBeanDefinition());
        } else {
            BeanDefinition beanDefinition = registry
                    .getBeanDefinition(IntegrationContextUtils.PUBLISHER_ANNOTATION_POSTPROCESSOR_NAME);
            MutablePropertyValues propertyValues = beanDefinition.getPropertyValues();
            PropertyValue defaultChannelPropertyValue = propertyValues.getPropertyValue("defaultChannelName");
            if (StringUtils.hasText(defaultChannel)) {
                if (defaultChannelPropertyValue == null) {
                    propertyValues.addPropertyValue("defaultChannelName", defaultChannel);
                    if (logger.isInfoEnabled()) {
                        logger.info("Setting '@Publisher' default-output-channel to '" + defaultChannel + "'.");
                    }
                } else if (!defaultChannel.equals(defaultChannelPropertyValue.getValue())) {
                    throw new BeanDefinitionStoreException("When more than one enable publisher definition "
                            + "(@EnablePublisher or <annotation-config>) is found in the context, "
                            + "they all must have the same 'default-publisher-channel' attribute value.");
                }
            }
        }
    }

}