Protocol Documentation

Table of Contents

• Booking.proto

  • Booking

  • BookingStatus

  • BookingStatusID

  • EmptyBookingMessage

  • BookingService

• Customer.proto

  • Address
  • Customer

• Vehicle.proto

  • Manufacturer

  • Model

  • Vehicle

  • Vehicle.Category

  • Manufacturer.Category

  • File-level Extensions

• Scalar Value Types

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Booking.proto

Booking related messages.

This file is really just an example. The data model is completely fictional.

Booking

Represents the booking of a vehicle.

Vehicles are some cool shit. But drive carefully!

Field	Type	Label	Description
vehicle_id	int32		ID of booked vehicle.
customer_id	int32		Customer that booked the vehicle.
status	BookingStatus		Status of the booking.
confirmation_sent	bool		Has booking confirmation been sent?
payment_received	bool		Has payment been received?
color_preference	string		Deprecated. Color preference of the customer.

BookingStatus

Represents the status of a vehicle booking.

Field	Type	Label	Description
id	int32		Unique booking status ID.
description	string		Booking status description. E.g. "Active".

BookingStatusID

Represents the booking status ID.

Field	Type	Label	Description
id	int32		Unique booking status ID.

EmptyBookingMessage

An empty message for testing

BookingService

Service for handling vehicle bookings.

Method Name	Request Type	Response Type	Description
BookVehicle	Booking	BookingStatus	Used to book a vehicle. Pass in a Booking and a BookingStatus will be returned.
BookingUpdates	BookingStatusID	BookingStatus stream	Used to subscribe to updates of the BookingStatus.

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Customer.proto

This file has messages for describing a customer.

Address

Represents a mail address.

Field	Type	Label	Description
address_line_1	string	required	First address line.
address_line_2	string	optional	Second address line.
address_line_3	string	optional	Second address line.
town	string	required	Address town.
county	string	optional	Address county, if applicable.
country	string	required	Address country.

Customer

Represents a customer.

Field	Type	Label	Description
id	int32	required	Unique customer ID.
first_name	string	required	Customer first name.
last_name	string	required	Customer last name.
details	string	optional	Customer details.
email_address	string	optional	Customer e-mail address.
phone_number	string	repeated	Customer phone numbers, primary first.
mail_addresses	Address	repeated	Customer mail addresses, primary first.

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Vehicle.proto

Messages describing manufacturers / vehicles.

Manufacturer

Represents a manufacturer of cars.

Field	Type	Label	Description
id	int32	required	The unique manufacturer ID.
code	string	required	A manufacturer code, e.g. "DKL4P".
details	string	optional	Manufacturer details (minimum orders et.c.).
category	Manufacturer.Category	optional	Manufacturer category. Default: CATEGORY_EXTERNAL

Model

Represents a vehicle model.

Field	Type	Label	Description
id	string	required	The unique model ID.
model_code	string	required	The car model code, e.g. "PZ003".
model_name	string	required	The car model name, e.g. "Z3".
daily_hire_rate_dollars	sint32	required	Dollars per day.
daily_hire_rate_cents	sint32	required	Cents per day.

Vehicle

Represents a vehicle that can be hired.

Field	Type	Label	Description
id	int32	required	Unique vehicle ID.
model	Model	required	Vehicle model.
reg_number	string	required	Vehicle registration number.
mileage	sint32	optional	Current vehicle mileage, if known.
category	Vehicle.Category	optional	Vehicle category.
daily_hire_rate_dollars	sint32	optional	Dollars per day. Default: 50
daily_hire_rate_cents	sint32	optional	Cents per day.

Extension	Type	Base	Number	Description
series	string	Model	100	Vehicle model series.

Vehicle.Category

Represents a vehicle category. E.g. "Sedan" or "Truck".

Field	Type	Label	Description
code	string	required	Category code. E.g. "S".
description	string	required	Category name. E.g. "Sedan".

Manufacturer.Category

Manufacturer category. A manufacturer may be either inhouse or external.

Name	Number	Description
CATEGORY_INHOUSE	0	The manufacturer is inhouse.
CATEGORY_EXTERNAL	1	The manufacturer is external.

File-level Extensions

Extension	Type	Base	Number	Description
country	string	Manufacturer	100	Manufacturer country. Default: China

Scalar Value Types

.proto Type	Notes	C++	Java	Python	Go	C#	PHP	Ruby
double		double	double	float	float64	double	float	Float
float		float	float	float	float32	float	float	Float
int32	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead.	int32	int	int	int32	int	integer	Bignum or Fixnum (as required)
int64	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead.	int64	long	int/long	int64	long	integer/string	Bignum
uint32	Uses variable-length encoding.	uint32	int	int/long	uint32	uint	integer	Bignum or Fixnum (as required)
uint64	Uses variable-length encoding.	uint64	long	int/long	uint64	ulong	integer/string	Bignum or Fixnum (as required)
sint32	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.	int32	int	int	int32	int	integer	Bignum or Fixnum (as required)
sint64	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.	int64	long	int/long	int64	long	integer/string	Bignum
fixed32	Always four bytes. More efficient than uint32 if values are often greater than $2^{28}$.	uint32	int	int	uint32	uint	integer	Bignum or Fixnum (as required)
fixed64	Always eight bytes. More efficient than uint64 if values are often greater than $2^{56}$.	uint64	long	int/long	uint64	ulong	integer/string	Bignum
sfixed32	Always four bytes.	int32	int	int	int32	int	integer	Bignum or Fixnum (as required)
sfixed64	Always eight bytes.	int64	long	int/long	int64	long	integer/string	Bignum
bool		bool	boolean	boolean	bool	bool	boolean	TrueClass/FalseClass
string	A string must always contain UTF-8 encoded or 7-bit ASCII text.	string	String	str/unicode	string	string	string	String (UTF-8)
bytes	May contain any arbitrary sequence of bytes.	string	ByteString	str	[]byte	ByteString	string	String (ASCII-8BIT)