io.spring.initializr.web.autoconfigure.CloudfoundryEnvironmentPostProcessor.java Source code

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Here is the source code for io.spring.initializr.web.autoconfigure.CloudfoundryEnvironmentPostProcessor.java

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/*
 * Copyright 2012-2017 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 io.spring.initializr.web.autoconfigure;

import java.util.LinkedHashMap;
import java.util.Map;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.context.config.ConfigFileApplicationListener;
import org.springframework.boot.env.EnvironmentPostProcessor;
import org.springframework.core.Ordered;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.MapPropertySource;
import org.springframework.core.env.MutablePropertySources;
import org.springframework.core.env.PropertySource;
import org.springframework.util.StringUtils;
import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;

/**
 * Post-process the environment to extract the service credentials provided by
 * CloudFoundry. Injects the elastic service URI if present.
 *
 * @author Stephane Nicoll
 */
public class CloudfoundryEnvironmentPostProcessor implements EnvironmentPostProcessor, Ordered {

    private static final String PROPERTY_SOURCE_NAME = "defaultProperties";

    private static final int ORDER = ConfigFileApplicationListener.DEFAULT_ORDER + 1;

    @Override
    public void postProcessEnvironment(ConfigurableEnvironment environment, SpringApplication springApplication) {

        Map<String, Object> map = new LinkedHashMap<>();
        String uri = environment.getProperty("vcap.services.stats-index.credentials.uri");
        if (StringUtils.hasText(uri)) {
            UriComponents uriComponents = UriComponentsBuilder.fromUriString(uri).build();
            String userInfo = uriComponents.getUserInfo();
            if (StringUtils.hasText(userInfo)) {
                String[] credentials = userInfo.split(":");
                map.put("initializr.stats.elastic.username", credentials[0]);
                map.put("initializr.stats.elastic.password", credentials[1]);
            }
            map.put("initializr.stats.elastic.uri",
                    UriComponentsBuilder.fromUriString(uri).userInfo(null).build().toString());

            addOrReplace(environment.getPropertySources(), map);
        }
    }

    @Override
    public int getOrder() {
        return ORDER;
    }

    private static void addOrReplace(MutablePropertySources propertySources, Map<String, Object> map) {
        MapPropertySource target = null;
        if (propertySources.contains(PROPERTY_SOURCE_NAME)) {
            PropertySource<?> source = propertySources.get(PROPERTY_SOURCE_NAME);
            if (source instanceof MapPropertySource) {
                target = (MapPropertySource) source;
                for (String key : map.keySet()) {
                    if (!target.containsProperty(key)) {
                        target.getSource().put(key, map.get(key));
                    }
                }
            }
        }
        if (target == null) {
            target = new MapPropertySource(PROPERTY_SOURCE_NAME, map);
        }
        if (!propertySources.contains(PROPERTY_SOURCE_NAME)) {
            propertySources.addLast(target);
        }
    }

}