Finder.java

package com.aol.micro.server.application.registry;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Stream;

import org.apache.commons.io.FileUtils;
import org.pcollections.ConsPStack;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.aol.micro.server.rest.jackson.JacksonUtil;

@Component
public class Finder {
	private final Logger logger = LoggerFactory.getLogger(getClass());
	private final RegisterConfig config;

	@Autowired
	public Finder(RegisterConfig config) {
		this.config = config;
	}

	public List<RegisterEntry> find() {
		return findDir(new File(config.getOutputDir()));
	}

	private List<RegisterEntry> findDir(File dir) {
		List<RegisterEntry> result = new ArrayList<>();
		
		Stream.of(dir.listFiles()).forEach(
				(next) -> {

					if (next.isDirectory())
						result.addAll(findDir(next));
					if (next.isFile()) {
						try {
							String fileString = FileUtils.readFileToString(next);
							result.add(JacksonUtil.convertFromJson(fileString, RegisterEntry.class));
						} catch (Exception e) {
							logger.error("Error loading service entry from disk {}", e,
									next.getAbsolutePath());

						}
					}
				});
		return ConsPStack.from(result);
	}
}