ContextInstanceDataPropertySourceBeanDefinitionParser.java

/*
 * Copyright 2013-2014 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
 *
 *      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 org.springframework.cloud.aws.context.config.xml;

import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.support.BeanDefinitionReaderUtils;
import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.cloud.aws.context.config.support.ContextConfigurationUtils;
import org.springframework.util.StringUtils;
import org.w3c.dom.Element;

import static org.springframework.cloud.aws.context.support.env.AwsCloudEnvironmentCheckUtils.isRunningOnCloudEnvironment;
import static org.springframework.cloud.aws.core.config.xml.XmlWebserviceConfigurationUtils.getCustomClientOrDefaultClientBeanName;

/**
 * @author Agim Emruli
 */
class ContextInstanceDataPropertySourceBeanDefinitionParser extends AbstractBeanDefinitionParser {

    private static final String USER_TAGS_BEAN_CLASS_NAME = "org.springframework.cloud.aws.core.env.ec2.AmazonEc2InstanceUserTagsFactoryBean";
    private static final String EC2_CLIENT_CLASS_NAME = "com.amazonaws.services.ec2.AmazonEC2Client";

    @Override
    protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {

        if (StringUtils.hasText(element.getAttribute("user-tags-map"))) {
            BeanDefinitionBuilder userTagsBuilder = BeanDefinitionBuilder.genericBeanDefinition(USER_TAGS_BEAN_CLASS_NAME);

            userTagsBuilder.addConstructorArgReference(
                    getCustomClientOrDefaultClientBeanName(element, parserContext, "amazon-ec2", EC2_CLIENT_CLASS_NAME));

            if (StringUtils.hasText(element.getAttribute("instance-id-provider"))) {
                userTagsBuilder.addConstructorArgReference(element.getAttribute("instance-id-provider"));
            }
            BeanDefinitionReaderUtils.registerBeanDefinition(
                    new BeanDefinitionHolder(userTagsBuilder.getBeanDefinition(), element.getAttribute("user-tags-map")),
                    parserContext.getRegistry());
        }

        if (isRunningOnCloudEnvironment()) {
            ContextConfigurationUtils.registerInstanceDataPropertySource(parserContext.getRegistry(),
                    element.getAttribute("value-separator"), element.getAttribute("attribute-separator"));
        }

        return null;
    }
}