org.springframework.cloud.aws.context.config.annotation.ContextStackConfiguration.java Source code

Introduction

Here is the source code for org.springframework.cloud.aws.context.config.annotation.ContextStackConfiguration.java

Source

/*
 * 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.annotation;

import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.services.cloudformation.AmazonCloudFormation;
import com.amazonaws.services.cloudformation.AmazonCloudFormationClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.aws.context.annotation.ConditionalOnMissingAmazonClient;
import org.springframework.cloud.aws.core.env.stack.config.StackResourceRegistryFactoryBean;
import org.springframework.cloud.aws.core.region.RegionProvider;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.ImportAware;
import org.springframework.core.annotation.AnnotationAttributes;
import org.springframework.core.type.AnnotationMetadata;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;

/**
 * @author Agim Emruli
 */
@Configuration
@Import(ContextDefaultConfigurationRegistrar.class)
public class ContextStackConfiguration implements ImportAware {

    private AnnotationAttributes annotationAttributes;

    @Autowired(required = false)
    private RegionProvider regionProvider;

    @Autowired(required = false)
    private AWSCredentialsProvider credentialsProvider;

    @Override
    public void setImportMetadata(AnnotationMetadata importMetadata) {
        this.annotationAttributes = AnnotationAttributes
                .fromMap(importMetadata.getAnnotationAttributes(EnableStackConfiguration.class.getName(), false));
        Assert.notNull(this.annotationAttributes,
                "@EnableStackConfiguration is not present on importing class " + importMetadata.getClassName());
    }

    @Bean
    public StackResourceRegistryFactoryBean stackResourceRegistryFactoryBean(
            AmazonCloudFormation amazonCloudFormation) {
        if (StringUtils.hasText(this.annotationAttributes.getString("stackName"))) {
            return new StackResourceRegistryFactoryBean(amazonCloudFormation,
                    this.annotationAttributes.getString("stackName"));
        } else {
            return new StackResourceRegistryFactoryBean(amazonCloudFormation);
        }
    }

    @Bean
    @ConditionalOnMissingAmazonClient(AmazonCloudFormation.class)
    public AmazonCloudFormation amazonCloudFormation() {

        AmazonCloudFormationClient formationClient;
        if (this.credentialsProvider != null) {
            formationClient = new AmazonCloudFormationClient(this.credentialsProvider);
        } else {
            formationClient = new AmazonCloudFormationClient();
        }

        if (this.regionProvider != null) {
            formationClient.setRegion(this.regionProvider.getRegion());
        }
        return formationClient;
    }
}