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Java client for Consul HTTP API (http://consul.io)

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package com.ecwid.consul;

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URL;
import java.net.URLEncoder;
import java.util.*;

/**
 * @author Vasily Vasilkov ([email protected])
 */
public class Utils {

	public static String encodeValue(String value) {
		try {
			return URLEncoder.encode(value, "UTF-8");
		} catch (UnsupportedEncodingException e) {
			throw new RuntimeException("So strange - every JVM has to support UTF-8 encoding.");
		}
	}

	public static String encodeUrl(String str) {
		try {
			URL url = new URL(str);
			URI uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(), url.getPort(), url.getPath(), url.getQuery(), url.getRef());
			return uri.toASCIIString();
		} catch (Exception e) {
			throw new RuntimeException("Can't encode url", e);
		}
	}

	public static String generateUrl(String baseUrl, UrlParameters... params) {
		return generateUrl(baseUrl, Arrays.asList(params));
	}

	public static String generateUrl(String baseUrl, List params) {
		if (params == null) {
			return baseUrl;
		}

		List allParams = new ArrayList();
		for (UrlParameters item : params) {
			if (item != null) {
				allParams.addAll(item.toUrlParameters());
			}
		}

		// construct the whole url
		StringBuilder result = new StringBuilder(baseUrl);

		Iterator paramsIterator = allParams.iterator();
		if (paramsIterator.hasNext()) {
			result.append("?").append(paramsIterator.next());
			while (paramsIterator.hasNext()) {
				result.append("&").append(paramsIterator.next());
			}
		}
		return result.toString();
	}

	public static Map createTokenMap(String token) {
		Map headers = new HashMap<>();
		headers.put("X-Consul-Token", token);
		return headers;
	}

	public static String toSecondsString(long waitTime) {
		return String.valueOf(waitTime) + "s";
	}

	public static String assembleAgentAddress(String host, int port, String path) {
		String agentPath = "";
		if (path != null && !path.trim().isEmpty()) {
			agentPath = "/" + path;
		}

		return String.format("%s:%d%s", host, port, agentPath);
	}
}