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Protocol Documentation

Table of Contents

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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?

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++ Type Java Type Python Type
double double double float
float 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
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
uint32 Uses variable-length encoding. uint32 int int/long
uint64 Uses variable-length encoding. uint64 long int/long
sint32 Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s. int32 int int
sint64 Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s. int64 long int/long
fixed32 Always four bytes. More efficient than uint32 if values are often greater than 2^28. uint32 int int
fixed64 Always eight bytes. More efficient than uint64 if values are often greater than 2^56. uint64 long int/long
sfixed32 Always four bytes. int32 int int
sfixed64 Always eight bytes. int64 long int/long
bool bool boolean boolean
string A string must always contain UTF-8 encoded or 7-bit ASCII text. string String str/unicode
bytes May contain any arbitrary sequence of bytes. string ByteString str