com.xebia.xsdnl.innorater.server.Servers.java Source code

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Here is the source code for com.xebia.xsdnl.innorater.server.Servers.java

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/*
 * Copyright 2015 Xebia Nederland B.V.
 *
 * License:
 * Creative Commons Attribution-NonCommercial 4.0 International
 * http://creativecommons.org/licenses/by-nc/4.0/
 */

package com.xebia.xsdnl.innorater.server;

import android.os.Build;

import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.squareup.okhttp.OkHttpClient;
import com.xebia.xsdnl.innorater.BuildConfig;

import java.util.Locale;

import retrofit.RequestInterceptor;
import retrofit.RestAdapter;
import retrofit.client.OkClient;
import retrofit.converter.GsonConverter;

/**
 * Configures and holds on to the REST client.
 */
public class Servers {

    private static RaterService raterService;

    public static RaterService raterService() {
        if (raterService == null) {
            OkHttpClient okHttpClient = new OkHttpClient();

            Gson gson = new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).create();

            final String userAgent = buildUserAgent();
            RequestInterceptor standardHeaders = new RequestInterceptor() {
                @Override
                public void intercept(RequestFacade request) {
                    // For response compression, AppEngine requires the Accept-Encoding header that
                    // OkHTTP adds automatically *and* the string "gzip" as part of the User-Agent.
                    request.addHeader("User-Agent", userAgent);
                    request.addHeader("Accept", "application/json");
                }
            };

            RestAdapter restAdapter = new RestAdapter.Builder().setClient(new OkClient(okHttpClient))
                    .setEndpoint("https://xebia-innovation-day-rater.appspot.com")
                    .setLogLevel(RestAdapter.LogLevel.FULL).setConverter(new GsonConverter(gson))
                    .setRequestInterceptor(standardHeaders).build();

            raterService = restAdapter.create(RaterService.class);
        }
        return raterService;
    }

    private static String buildUserAgent() {
        int appVersion = BuildConfig.VERSION_CODE;
        int androidSdk = Build.VERSION.SDK_INT;
        // We truncate the Build.VERSION string to 40 chars. I have seen things...
        String androidVersion = truncate(Build.VERSION.RELEASE);
        String manufacturer = truncate(Build.MANUFACTURER);
        String model = truncate(Build.MODEL);
        return String.format(Locale.US, "InnoRater/%d; (Android/%s; %d; %s; %s) gzip", appVersion, androidVersion,
                androidSdk, manufacturer, model);
    }

    private static String truncate(String raw) {
        if (raw.length() > 40) {
            return raw.substring(0, 40);
        }
        return raw;
    }
}