example

Documentation

Overview

Package example contains code generation algorithms to produce an example server and client implementation for the transports defined in the design.

Index

• Variables
• func CLIFiles(genpkg string, root *expr.RootExpr) []*codegen.File
• func ServerFiles(genpkg string, root *expr.RootExpr) []*codegen.File
• type Data
  • func (s *Data) AvailableHosts() []string
  • func (s *Data) DefaultHost() *HostData
  • func (s *Data) DefaultTransport() *TransportData
  • func (s *Data) HasTransport(transport Transport) bool
• type HostData
  • func (h *HostData) DefaultURL(transport Transport) string
• type ServersData
  • func (d ServersData) Get(svr *expr.ServerExpr) *Data
• type Transport
• type TransportData
• type URIData
• type VariableData

Variables

var Servers = make(ServersData)

Servers holds the server data needed to generate the example service and client. It is computed from the Server expressions in the service design.

Functions

func CLIFiles

func CLIFiles(genpkg string, root *expr.RootExpr) []*codegen.File

CLIFiles returns example client tool main implementation for each server expression in the design.

func ServerFiles

func ServerFiles(genpkg string, root *expr.RootExpr) []*codegen.File

ServerFiles returns an example server main implementation for every server expression in the service design.

Types

type Data

type Data struct {
	// Name is the server name.
	Name string
	// Description is the server description.
	Description string
	// Services is the list of services supported by the server.
	Services []string
	// Schemes is the list of supported schemes by the server.
	Schemes []string
	// Hosts is the list of hosts defined in the server.
	Hosts []*HostData
	// Variables is the list of URL parameters defined in every host.
	Variables []*VariableData
	// Transports is the list of transports defined in the server.
	Transports []*TransportData
	// Dir is the directory name for the generated client and server examples.
	Dir string
}

Data contains the data about a single server.

func (*Data) AvailableHosts

func (s *Data) AvailableHosts() []string

AvailableHosts returns a list of available host names.

func (*Data) DefaultHost

func (s *Data) DefaultHost() *HostData

DefaultHost returns the first host defined in the server expression.

func (*Data) DefaultTransport

func (s *Data) DefaultTransport() *TransportData

DefaultTransport returns the default transport for the given server. If multiple transports are defined, HTTP transport is used as the default.

func (*Data) HasTransport

func (s *Data) HasTransport(transport Transport) bool

HasTransport checks if the server supports the given transport.

type HostData

type HostData struct {
	// Name is the host name.
	Name string
	// Description is the host description.
	Description string
	// Schemes is the list of schemes supported by the host. It is computed
	// from the URI expressions defined in the Host.
	// Possible values are http, https, grpc, grpcs.
	Schemes []string
	// URIs is the list of URLs defined in the host.
	URIs []*URIData
	// Variables is the list of URL parameters.
	Variables []*VariableData
}

HostData contains the data about a single host in a server.

func (*HostData) DefaultURL

func (h *HostData) DefaultURL(transport Transport) string

DefaultURL returns the first URL defined for the given transport in a host.

type ServersData

type ServersData map[string]*Data

ServersData holds the server data from the service design indexed by server name.

func (ServersData) Get

func (d ServersData) Get(svr *expr.ServerExpr) *Data

Get returns the server data for the given server expression. It builds the server data if the server name does not exist in the map.

type Transport

type Transport string

Transport is a type for supported goa transports.

const (
	// TransportHTTP is the HTTP transport.
	TransportHTTP Transport = "http"
	// TransportGRPC is the gRPC transport.
	TransportGRPC = "grpc"
)

type TransportData

type TransportData struct {
	// Type is the transport type.
	Type Transport
	// Name is the transport name.
	Name string
}

TransportData contains the data about a transport (http or grpc).

type URIData

type URIData struct {
	// URL is the underlying URL.
	URL string
	// Scheme is the URL scheme.
	Scheme string
	// Port is the default port for the scheme.
	// http - 80, https - 443, grpc - 8080, grpcs - 8443
	Port string
	// Transport is the transport type for the URL.
	Transport *TransportData
}

URIData contains the data about a URL.

type VariableData

type VariableData struct {
	// Name is the name of the variable.
	Name string
	// Description is the variable description.
	Description string
	// VarName is the variable name used in generating flag variables.
	VarName string
	// DefaultValue is the default value for the variable. It is set to the
	// default value defined in the variable attribute if exists, or else set
	// to the first value in the enum expression.
	DefaultValue string
	// Values is the list of allowed values for the variable. The values can
	// only be primitives. We convert the primitives into string type so that
	// we could use them to replace the URL variables in the example
	// generation.
	Values []string
}

VariableData contains the data about a URL variable.