Usage example

gistfile1.java

    public MyService(Config config) {
        HttpClient.Builder builder = new  HttpClient.Builder();
        builder
          .setUserAgent(config.value(Prop.USER_AGENT, String.class))
          .setRequestTimeout(config.value(Prop.REQ_TIMEOUT,Integer.class))
          // etc.etc….
          .setCompression(config.value(Prop.COMPRESSION_ENABLED, Boolean.class));
        if(config.value(Prop.PROXY_ENABLED,Boolean.class)){
            Proxy proxy = config.value(Prop.PROXY,Proxy.class);
            builder.setProxy(proxy);
        }
        client =  builder.build();
    }