grpcutil

package
v1.6.0 Latest Latest
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Published: Oct 4, 2017 License: Apache-2.0 Imports: 14 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source
var (
	// ErrMustSpecifyRegisterFunc is used when a register func is nil.
	ErrMustSpecifyRegisterFunc = errors.New("must specify registerFunc")
)
View Source
var (
	// MaxMsgSize is used to define the GRPC frame size
	MaxMsgSize = 20 * 1024 * 1024
)

Functions

func Chunk added in v1.4.5

func Chunk(data []byte, chunkSize int) [][]byte

Chunk splits a piece of data up, this is useful for splitting up data that's bigger than MaxMsgSize

func ChunkReader added in v1.4.6

func ChunkReader(r io.Reader, f func([]byte) error) (int, error)

ChunkReader splits a reader into reasonably sized chunks for the purpose of transmitting the chunks over gRPC. For each chunk, it calls the given function.

func GetBuffer added in v1.4.6

func GetBuffer() []byte

GetBuffer returns a buffer. The buffer may or may not be freshly allocated, and it may or may not be zero-ed.

func NewStreamingBytesReader added in v1.3.5

func NewStreamingBytesReader(streamingBytesClient StreamingBytesClient) io.Reader

NewStreamingBytesReader returns an io.Reader for a StreamingBytesClient.

func NewStreamingBytesWriter added in v1.3.5

func NewStreamingBytesWriter(streamingBytesServer StreamingBytesServer) io.Writer

NewStreamingBytesWriter returns an io.Writer for a StreamingBytesServer.

func PutBuffer added in v1.4.6

func PutBuffer(buf []byte)

PutBuffer returns the buffer to the pool.

func ScrubGRPC added in v1.6.0

func ScrubGRPC(err error) error

ScrubGRPC removes GRPC error code information from 'err' if it came from GRPC (and returns it unchanged otherwise)

func Serve added in v1.3.5

func Serve(
	registerFunc func(*grpc.Server),
	options ServeOptions,
	serveEnv ServeEnv,
) (retErr error)

Serve serves stuff.

func WriteFromStreamingBytesClient added in v1.3.5

func WriteFromStreamingBytesClient(streamingBytesClient StreamingBytesClient, writer io.Writer) error

WriteFromStreamingBytesClient writes from the StreamingBytesClient to the io.Writer.

func WriteToStreamingBytesServer added in v1.3.5

func WriteToStreamingBytesServer(reader io.Reader, streamingBytesServer StreamingBytesServer) error

WriteToStreamingBytesServer writes the data from the io.Reader to the StreamingBytesServer.

Types

type Dialer

type Dialer interface {
	Dial(address string) (*grpc.ClientConn, error)
	CloseConns() error
}

Dialer defines a grpc.ClientConn connection dialer.

func NewDialer

func NewDialer(opts ...grpc.DialOption) Dialer

NewDialer creates a Dialer.

type ReaderWrapper added in v1.6.0

type ReaderWrapper struct {
	Reader io.Reader
}

ReaderWrapper wraps a reader for the following reason: Go's io.CopyBuffer has an annoying optimization wherein if the reader has the WriteTo function defined, it doesn't actually use the given buffer. As a result, we might write a large chunk to the gRPC streaming server even though we intend to use a small buffer. Therefore we wrap readers in this wrapper so that only Read is defined.

func (ReaderWrapper) Read added in v1.6.0

func (r ReaderWrapper) Read(p []byte) (int, error)

type ServeEnv added in v1.3.5

type ServeEnv struct {
	// Default is 7070.
	GRPCPort uint16 `env:"GRPC_PORT,default=7070"`
}

ServeEnv are environment variables for serving.

type ServeOptions added in v1.3.5

type ServeOptions struct {
	Version    *versionpb.Version
	MaxMsgSize int
}

ServeOptions represent optional fields for serving.

type StreamingBytesClient added in v1.3.5

type StreamingBytesClient interface {
	Recv() (*types.BytesValue, error)
}

StreamingBytesClient represents a client for an rpc method of the form:

rpc Foo(Bar) returns (stream google.protobuf.BytesValue) {}

type StreamingBytesServer added in v1.3.5

type StreamingBytesServer interface {
	Send(bytesValue *types.BytesValue) error
}

StreamingBytesServer represents a server for an rpc method of the form:

rpc Foo(Bar) returns (stream google.protobuf.BytesValue) {}

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