queue

Documentation

Index

• func DecodeToBrokerMessage(msg []byte) (broker.Message, error)
• func EncodeProtoWithContext(ctx context.Context, msg proto.Message) []byte
• type Consumer
• type Queue
  • func OpenQueue(ctx context.Context, urlstr string) (Queue, error)
• type TypeWithContext
• type URLMux
  • func DefaultURLMux() *URLMux
  • func (mux *URLMux) OpenQueue(ctx context.Context, urlstr string) (Queue, error)
  • func (mux *URLMux) Register(scheme string, opener URLOpener)
  • func (mux *URLMux) Schemes() []string
  • func (mux *URLMux) ValidScheme(scheme string) bool
• type URLOpener

Functions

func DecodeToBrokerMessage

func DecodeToBrokerMessage(msg []byte) (broker.Message, error)

DecodeToBrokerMessage tries to parse a combination of json-encoded metadata and a marshalled protobuf

func EncodeProtoWithContext

func EncodeProtoWithContext(ctx context.Context, msg proto.Message) []byte

EncodeProtoWithContext combines json-encoded context metadata and marshalled proto.Message into a unique []byte

Types

type Consumer

type Consumer func(...broker.Message)

type Queue

type Queue interface {
	Push(ctx context.Context, msg proto.Message) error
	Consume(callback Consumer) error
}

func OpenQueue

func OpenQueue(ctx context.Context, urlstr string) (Queue, error)

OpenQueue opens a Queue identified by the URL given. See the URLOpener documentation in driver subpackages for details on supported URL formats, and https://gocloud.dev/concepts/urls for more information.

type TypeWithContext

type TypeWithContext[T any] struct {
	Original T
	Ctx      context.Context
}

TypeWithContext composes a generic type and a context

type URLMux

type URLMux struct {
	// contains filtered or unexported fields
}

URLMux is a URL opener multiplexer. It matches the scheme of the URLs against a set of registered schemes and calls the opener that matches the URL's scheme. See https://gocloud.dev/concepts/urls/ for more information.

The zero value is a multiplexer with no registered schemes.

func DefaultURLMux

func DefaultURLMux() *URLMux

DefaultURLMux returns the URLMux used by OpenTopic and OpenSubscription.

Driver packages can use this to register their TopicURLOpener and/or SubscriptionURLOpener on the mux.

func (*URLMux) OpenQueue

func (mux *URLMux) OpenQueue(ctx context.Context, urlstr string) (Queue, error)

OpenQueue calls OpenURL with the URL parsed from urlstr. OpenTopic is safe to call from multiple goroutines.

func (*URLMux) Register

func (mux *URLMux) Register(scheme string, opener URLOpener)

Register registers the opener with the given scheme. If an opener already exists for the scheme, Register panics.

func (*URLMux) Schemes

func (mux *URLMux) Schemes() []string

Schemes returns a sorted slice of the registered schemes.

func (*URLMux) ValidScheme

func (mux *URLMux) ValidScheme(scheme string) bool

ValidScheme returns true if scheme has been registered.

type URLOpener

type URLOpener interface {
	OpenURL(ctx context.Context, u *url.URL) (Queue, error)
}

URLOpener represents types than can open Registries based on a URL. The opener must not modify the URL argument. OpenURL must be safe to call from multiple goroutines.

This interface is generally implemented by types in driver packages.