Ngnix Config Controller

NgnixEnvironmentController.java

import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.config.Environment;
import org.springframework.cloud.config.PropertySource;
import org.springframework.cloud.config.server.ConfigServerProperties;
import org.springframework.cloud.config.server.EncryptionController;
import org.springframework.cloud.config.server.JGitEnvironmentRepository;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import freemarker.cache.NullCacheStorage;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;

@RestController
public class NgnixEnvironmentController {

	private JGitEnvironmentRepository repository;
	private EncryptionController encryption;
	private Configuration freemarker;

	@Autowired
	public NgnixEnvironmentController(JGitEnvironmentRepository repository, EncryptionController encryption)
			throws IOException {
		this.repository = repository;
		this.encryption = encryption;
		freemarker = new Configuration(Configuration.VERSION_2_3_21);
		freemarker.setCacheStorage(new NullCacheStorage());
		freemarker.setDirectoryForTemplateLoading(repository.getBasedir());
	}

	@RequestMapping(value = "/ngnix/{profiles}", produces = "text/plain")
	public String renderConfigFor(@PathVariable String profiles) throws IOException, TemplateException {
		return renderConfigFor(profiles, ConfigServerProperties.MASTER);
	}

	@RequestMapping(value = "/ngnix/{profiles}/{label}", produces = "text/plain")
	public String renderConfigFor(@PathVariable String profiles, @PathVariable String label) throws IOException,
	TemplateException {
		Environment environment = encryption.decrypt(repository.findOne("ngnix", profiles, label));
		List<PropertySource> sources = new ArrayList<>(environment.getPropertySources());
		Collections.reverse(sources);
		Map<Object, Object> dataModel = new HashMap<>();
		for (PropertySource source : sources) {
			Map<?, ?> values = source.getSource();
			dataModel.putAll(values);
		}
		Template template = freemarker.getTemplate("ngnix.ftl");
		StringWriter out = new StringWriter();
		template.process(dataModel, out);
		String config = out.toString();
		return config;
	}

}