Azure Progress Filter

  /**
     * This filter uses to add new Header elements
     * or it can be added new Log elements.
     *
     * @since 0.1.1
     */
    private class ProgressFilter implements ServiceFilter {

        /**
         * @param request Request object
         * @return Log message
         * @since 0.1.1
         */
        @NonNull
        private String getRequest( ServiceFilterRequest request ) {
            StringBuilder requestMessage = new StringBuilder( "====== REQUEST START ======" );
            requestMessage.append( "\n" );
            requestMessage.append( "URL : " );
            requestMessage.append( request.getUrl() );
            requestMessage.append( "\n" );
            requestMessage.append( "\n" );
            requestMessage.append( "Headers : " );
            requestMessage.append( request.getHeaders() );
            requestMessage.append( "\n" );
            requestMessage.append( "Content : " );
            requestMessage.append( request.getContent() );
            requestMessage.append( "\n" );
            requestMessage.append( "====== REQUEST END ======" );

            return requestMessage.toString();

        }

        @NonNull
        private String getResponse( ServiceFilterResponse response ) {
            StringBuilder responseMessage = new StringBuilder( "====== RESPONSE START ======" );
            responseMessage.append( "\n" );
            responseMessage.append( "Headers : " );
            responseMessage.append( response.getHeaders() );
            responseMessage.append( "\n" );
            responseMessage.append( "Content : " );
            responseMessage.append( response.getContent() );
            responseMessage.append( "\n" );
            responseMessage.append( "====== RESPONSE END ======" );

            return responseMessage.toString();

        }

        @Override
        public ListenableFuture< ServiceFilterResponse > handleRequest( ServiceFilterRequest request, NextServiceFilterCallback next ) {

            final SettableFuture< ServiceFilterResponse > resultFuture = SettableFuture.create();
            ListenableFuture< ServiceFilterResponse > future = next.onNext( request );

            Logger.t( "REQUEST" ).i( getRequest( request ) );

            Futures.addCallback( future, new FutureCallback< ServiceFilterResponse >() {
                @Override
                public void onFailure( Throwable e ) {
                    resultFuture.setException( e );
                    e.printStackTrace();
                    Logger.t( "RESPONSE" ).i( e.getMessage() );

                }

                @Override
                public void onSuccess( ServiceFilterResponse response ) {
                    resultFuture.set( response );
                    Logger.t( "RESPONSE" ).i( getResponse( response ) );

                }
            } );

            return resultFuture;
        }
    }