io.awspring.cloud.autoconfigure.secretsmanager.AwsSecretsManagerConfigDataLocationResolver Maven / Gradle / Ivy

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/*
 * Copyright 2013-2020 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 io.awspring.cloud.autoconfigure.secretsmanager;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import com.amazonaws.services.secretsmanager.AWSSecretsManager;
import io.awspring.cloud.secretsmanager.AwsSecretsManagerProperties;
import io.awspring.cloud.secretsmanager.AwsSecretsManagerPropertySources;
import org.apache.commons.logging.Log;

import org.springframework.boot.BootstrapContext;
import org.springframework.boot.BootstrapRegistry;
import org.springframework.boot.ConfigurableBootstrapContext;
import org.springframework.boot.context.config.ConfigDataLocation;
import org.springframework.boot.context.config.ConfigDataLocationNotFoundException;
import org.springframework.boot.context.config.ConfigDataLocationResolver;
import org.springframework.boot.context.config.ConfigDataLocationResolverContext;
import org.springframework.boot.context.config.Profiles;
import org.springframework.boot.context.properties.bind.Bindable;
import org.springframework.boot.context.properties.bind.Binder;
import org.springframework.util.StringUtils;

/**
 * Resolves config data locations in AWS Secrets Manager.
 *
 * @author Eddú Meléndez
 * @author Maciej Walkowiak
 * @since 2.3.0
 */
public class AwsSecretsManagerConfigDataLocationResolver
		implements ConfigDataLocationResolver {

	private final Log log;

	/**
	 * AWS Secrets Manager Config Data prefix.
	 */
	public static final String PREFIX = "aws-secretsmanager:";

	public AwsSecretsManagerConfigDataLocationResolver(Log log) {
		this.log = log;
	}

	@Override
	public boolean isResolvable(ConfigDataLocationResolverContext context, ConfigDataLocation location) {
		if (!location.hasPrefix(PREFIX)) {
			return false;
		}
		return context.getBinder().bind(AwsSecretsManagerProperties.CONFIG_PREFIX + ".enabled", Boolean.class)
				.orElse(true);
	}

	@Override
	public List resolve(ConfigDataLocationResolverContext context,
			ConfigDataLocation location) throws ConfigDataLocationNotFoundException {
		return Collections.emptyList();
	}

	@Override
	public List resolveProfileSpecific(
			ConfigDataLocationResolverContext resolverContext, ConfigDataLocation location, Profiles profiles)
			throws ConfigDataLocationNotFoundException {
		registerBean(resolverContext, AwsSecretsManagerProperties.class, loadProperties(resolverContext.getBinder()));

		registerAndPromoteBean(resolverContext, AWSSecretsManager.class, this::createAwsSecretsManagerClient);

		AwsSecretsManagerProperties properties = loadConfigProperties(resolverContext.getBinder());

		AwsSecretsManagerPropertySources propertySources = new AwsSecretsManagerPropertySources(properties, log);

		List contexts = location.getValue().equals(PREFIX)
				? propertySources.getAutomaticContexts(profiles.getAccepted())
				: getCustomContexts(location.getNonPrefixedValue(PREFIX));

		List locations = new ArrayList<>();
		contexts.forEach(
				propertySourceContext -> locations.add(new AwsSecretsManagerConfigDataResource(propertySourceContext,
						location.isOptional(), propertySources)));

		return locations;
	}

	private List getCustomContexts(String keys) {
		if (StringUtils.hasLength(keys)) {
			return Arrays.asList(keys.split(";"));
		}
		return Collections.emptyList();
	}

	protected  void registerAndPromoteBean(ConfigDataLocationResolverContext context, Class type,
			BootstrapRegistry.InstanceSupplier supplier) {
		registerBean(context, type, supplier);
		context.getBootstrapContext().addCloseListener(event -> {
			T instance = event.getBootstrapContext().get(type);
			event.getApplicationContext().getBeanFactory().registerSingleton("configData" + type.getSimpleName(),
					instance);
		});
	}

	public  void registerBean(ConfigDataLocationResolverContext context, Class type, T instance) {
		context.getBootstrapContext().registerIfAbsent(type, BootstrapRegistry.InstanceSupplier.of(instance));
	}

	protected  void registerBean(ConfigDataLocationResolverContext context, Class type,
			BootstrapRegistry.InstanceSupplier supplier) {
		ConfigurableBootstrapContext bootstrapContext = context.getBootstrapContext();
		bootstrapContext.registerIfAbsent(type, supplier);
	}

	protected AWSSecretsManager createAwsSecretsManagerClient(BootstrapContext context) {
		AwsSecretsManagerProperties properties = context.get(AwsSecretsManagerProperties.class);

		return AwsSecretsManagerBootstrapConfiguration.createSecretsManagerClient(properties);
	}

	protected AwsSecretsManagerProperties loadProperties(Binder binder) {
		return binder.bind(AwsSecretsManagerProperties.CONFIG_PREFIX, Bindable.of(AwsSecretsManagerProperties.class))
				.orElseGet(AwsSecretsManagerProperties::new);
	}

	protected AwsSecretsManagerProperties loadConfigProperties(Binder binder) {
		AwsSecretsManagerProperties properties = binder
				.bind(AwsSecretsManagerProperties.CONFIG_PREFIX, Bindable.of(AwsSecretsManagerProperties.class))
				.orElseGet(AwsSecretsManagerProperties::new);

		if (!StringUtils.hasLength(properties.getName())) {
			properties.setName(binder.bind("spring.application.name", String.class).orElse("application"));
		}

		return properties;
	}

}