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 Go to latest Published: Apr 2, 2024 License: BSD-3-Clause Imports: 14 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// XServiceError contains error info of service invocation
	XServiceError  = "X-Service-Error"
	XServicePath   = "X-Service-Path"
	XServiceMethod = "X-Service-Method"
)
View Source 
const (
	Epoch int64 = 1625068800 // 2021.7.1 00:00:00
)
View Source 
const HeaderLength = 12
View Source 
const (
	MsgVersionOne byte = 1
)

Variables

View Source 
var (
	// ErrMetaKVMissing some keys or values are missing.
	ErrMetaKVMissing = errors.New("wrong metadata lines. some keys or values are missing")
	// ErrMessageTooLong message is too long
	ErrMessageTooLong        = errors.New("message size too long")
	ErrUnsupportedCompressor = errors.New("unsupported compressor")
	ErrMetadataTooLong       = errors.New("metadata size too long")
	ErrVersionNotMatch       = errors.New("version is not match")
	ErrInvalidMessage        = errors.New("invalid message")
)
View Source 
var Codecs = map[SerializeType]Codec{
	SerializeNone: &ByteCodec{},
	ProtoBuffer:   &PBCodec{},
}

Codecs are codecs supported by mq. You can add customized codecs in Codecs.

View Source 
var Compressors = map[CompressType]Compressor{}

Compressors are compressors supported by rpc. You can add customized compressor in Compressors.

Functions

func CreateID 

func CreateID(sid int, seq uint32) uint64

func DecodeContentContext 

func DecodeContentContext(ctx context.Context) interface{}

func DecodeMetaContext 

func DecodeMetaContext(ctx context.Context) metadata.MD

func DecodeReqMetaContext 

func DecodeReqMetaContext(ctx context.Context) map[string]string

func DecodeResMetaContext 

func DecodeResMetaContext(ctx context.Context) map[string]string

func EncodeContentContext 

func EncodeContentContext(ctx context.Context, content interface{}) context.Context

func EncodeMetaContext 

func EncodeMetaContext(ctx context.Context, meta metadata.MD) context.Context

func EncodeReqMetaContext 

func EncodeReqMetaContext(ctx context.Context, meta map[string]string) context.Context

func EncodeResMetaContext 

func EncodeResMetaContext(ctx context.Context, meta map[string]string) context.Context

func PutMessage 

func PutMessage(m *Message)

func RegisterCodec 

func RegisterCodec(t SerializeType, c Codec)

RegisterCodec register customized codec.

func SizeMeta 

func SizeMeta(m map[string]string) int

func SizeMetadata 

func SizeMetadata(meta metadata.MD) (n int)

Types

type BufferRead 

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

func NewBufferRead 

func NewBufferRead(buf []byte) *BufferRead

func (*BufferRead) Buf 

func (b *BufferRead) Buf() ([]byte, error)

func (*BufferRead) Byte 

func (b *BufferRead) Byte() byte

func (*BufferRead) Bytes 

func (b *BufferRead) Bytes(size int) []byte

func (*BufferRead) Double 

func (b *BufferRead) Double() float64

func (*BufferRead) Dump 

func (b *BufferRead) Dump() string

func (*BufferRead) DumpSize 

func (b *BufferRead) DumpSize(size int) string

func (*BufferRead) Error 

func (b *BufferRead) Error() error

func (*BufferRead) Int 

func (b *BufferRead) Int() int

func (*BufferRead) Int16 

func (b *BufferRead) Int16() int16

func (*BufferRead) Int32 

func (b *BufferRead) Int32() int32

func (*BufferRead) Int64 

func (b *BufferRead) Int64() int64

func (*BufferRead) Len 

func (b *BufferRead) Len() int

func (*BufferRead) Offset 

func (b *BufferRead) Offset() int

func (*BufferRead) Reset 

func (b *BufferRead) Reset()

func (*BufferRead) SmallVarchar 

func (b *BufferRead) SmallVarchar() string

func (*BufferRead) String 

func (b *BufferRead) String() string

func (*BufferRead) UInt 

func (b *BufferRead) UInt() uint

func (*BufferRead) UInt16 

func (b *BufferRead) UInt16() uint16

func (*BufferRead) UInt32 

func (b *BufferRead) UInt32() uint32

func (*BufferRead) UInt64 

func (b *BufferRead) UInt64() uint64

func (*BufferRead) Varchar 

func (b *BufferRead) Varchar() string

type BufferWrite 

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

func NewBufferWrite 

func NewBufferWrite(buf []byte) *BufferWrite

func (*BufferWrite) AppendByte 

func (b *BufferWrite) AppendByte(s byte)

func (*BufferWrite) AppendBytes 

func (b *BufferWrite) AppendBytes(s []byte)

func (*BufferWrite) AppendDouble 

func (b *BufferWrite) AppendDouble(s float64)

func (*BufferWrite) AppendInt 

func (b *BufferWrite) AppendInt(s int)

func (*BufferWrite) AppendInt16 

func (b *BufferWrite) AppendInt16(s int16)

func (*BufferWrite) AppendInt32 

func (b *BufferWrite) AppendInt32(s int32)

func (*BufferWrite) AppendInt64 

func (b *BufferWrite) AppendInt64(s int64)

func (*BufferWrite) AppendSmallVarchar 

func (b *BufferWrite) AppendSmallVarchar(s string)

func (*BufferWrite) AppendString 

func (b *BufferWrite) AppendString(s string)

func (*BufferWrite) AppendUInt 

func (b *BufferWrite) AppendUInt(s uint)

func (*BufferWrite) AppendUInt16 

func (b *BufferWrite) AppendUInt16(s uint16)

func (*BufferWrite) AppendUInt32 

func (b *BufferWrite) AppendUInt32(s uint32)

func (*BufferWrite) AppendUInt64 

func (b *BufferWrite) AppendUInt64(s uint64)

func (*BufferWrite) AppendVarchar 

func (b *BufferWrite) AppendVarchar(s string)

func (*BufferWrite) Buf 

func (b *BufferWrite) Buf() []byte

func (*BufferWrite) Detach 

func (b *BufferWrite) Detach() []byte

func (*BufferWrite) Len 

func (b *BufferWrite) Len() int

func (*BufferWrite) Reset 

func (b *BufferWrite) Reset()

type ByteCodec 

type ByteCodec struct{}

ByteCodec uses raw slice pf bytes and don't encode/decode.

func (ByteCodec) Decode 

func (c ByteCodec) Decode(data []byte, i interface{}) error

Decode returns raw slice of bytes.

func (ByteCodec) Encode 

func (c ByteCodec) Encode(i interface{}) ([]byte, error)

Encode returns raw slice of bytes.

type Codec 

type Codec interface {
	Encode(i interface{}) ([]byte, error)
	Decode(data []byte, i interface{}) error
}

Codec defines the interface that decode/encode payload.

type CompressType 

type CompressType byte

CompressType defines decompression type. 

const (
	// None does not compress.
	None CompressType = iota
	// Gzip uses gzip compression.
	Gzip
	Snappy
	ZStd
)

type Compressor 

type Compressor interface {
	Zip([]byte) (Stream, error)
	Unzip([]byte) (Stream, error)
}

Compressor defines a common compression interface. 

type Header [HeaderLength]byte

Header is the first part of Message and has fixed size. Format: 

version uint8
protocolType uint8:7
oneway uint8:6
statusType uint8:4-5
serializeType uint8:0-3
compressType uint8
reserved uint8
messageID uint64

func NewHeader 

func NewHeader(h []byte) *Header

func (*Header) CompressType 

func (h *Header) CompressType() CompressType

CompressType returns compression type of messages.

func (*Header) IsOneway 

func (h *Header) IsOneway() bool

IsOneway returns whether the message is one-way message. If true, server won't send responses.

func (*Header) MessageType 

func (h *Header) MessageType() ProtocolType

MessageType returns the message protocol type.

func (*Header) MsgID 

func (h *Header) MsgID() uint64

MsgID returns sequence number of messages.

func (*Header) SerializeType 

func (h *Header) SerializeType() SerializeType

SerializeType returns serialization type of payload.

func (*Header) SetCompressType 

func (h *Header) SetCompressType(ct CompressType)

SetCompressType sets the compression type.

func (*Header) SetMessageType 

func (h *Header) SetMessageType(mt ProtocolType)

SetMessageType sets message type.

func (*Header) SetMsgID 

func (h *Header) SetMsgID(id uint64)

SetMsgID sets sequence number.

func (*Header) SetOneway 

func (h *Header) SetOneway(oneway bool)

SetOneway sets the oneway flag.

func (*Header) SetSerializeType 

func (h *Header) SetSerializeType(st SerializeType)

SetSerializeType sets the serialization type.

func (*Header) SetStatusType 

func (h *Header) SetStatusType(mt StatusType)

SetStatusType sets message status type.

func (*Header) SetVersion 

func (h *Header) SetVersion(v byte)

SetVersion sets version for this header.

func (*Header) StatusType 

func (h *Header) StatusType() StatusType

StatusType returns the message status type.

func (*Header) Version 

func (h *Header) Version() byte

Version returns version of app protocol.

type Marshaler 

type Marshaler interface {
	Marshal() ([]byte, error)
}

Marshaler is the interface representing objects that can marshal themselves.

type Message 

type Message struct {
	Header
	ServicePath   string
	ServiceMethod string
	Metadata      map[string]string
	Payload       []byte
	Content       interface{}
}

Message is the generic type of Request and Response. Version-One Format: 

header [12]byte
metadata_length int
metadata []KV
payload_length int
payload  [payload_length-4]byte

func GetMessage 

func GetMessage() *Message

func (*Message) AddMeta 

func (m *Message) AddMeta(k, v string)

func (*Message) Clone 

func (m *Message) Clone() *Message

Clone clones from a message.

func (*Message) Decode 

func (m *Message) Decode(data []byte) error

Decode decodes a message from reader.

func (*Message) Encode 

func (m *Message) Encode(data []byte) []byte

Encode encodes messages.

func (*Message) Free 

func (m *Message) Free()

func (*Message) Reset 

func (m *Message) Reset()

Reset clean data of this message but keep allocated data

type PBCodec 

type PBCodec struct{}

PBCodec uses protobuf marshaler and unmarshaler.

func (PBCodec) Decode 

func (c PBCodec) Decode(data []byte, i interface{}) error

Decode decodes an object from slice of bytes.

func (PBCodec) Encode 

func (c PBCodec) Encode(i interface{}) ([]byte, error)

Encode encodes an object into slice of bytes.

type ProtocolType 

type ProtocolType byte

ProtocolType is message type of requests and responses. 

const (
	// Request is message type of request
	Request ProtocolType = iota
	// Response is message type of response
	Response
)

type ReqMetaKey 

type ReqMetaKey struct{}

type ResMetaKey 

type ResMetaKey struct{}

type SerializeType 

type SerializeType byte

SerializeType defines serialization type of payload. 

const (
	// SerializeNone uses raw []byte and don't serialize/deserialize
	SerializeNone SerializeType = iota
	// ProtoBuffer for payload.
	ProtoBuffer
	// JSON for payload.
	JSON
	// JSONIter for payload
	JSONIter
)

type StatusType 

type StatusType byte

StatusType is status of messages. 

const (
	// Normal is normal requests and responses.
	Normal StatusType = iota
	// Error indicates some errors occur.
	Error
)

type Stream 

type Stream interface {
	io.Writer
	io.Reader
	Bytes() []byte
	Detach() []byte
	Reset()
	Free()
}

type Unmarshaler 

type Unmarshaler interface {
	Unmarshal([]byte) error
}

Unmarshaler is the interface representing objects that can unmarshal themselves. The argument points to data that may be overwritten, so implementations should not keep references to the buffer. Unmarshal implementations should not clear the receiver. Any unmarshaled data should be merged into the receiver. Callers of Unmarshal that do not want to retain existing data should Reset the receiver before calling Unmarshal.

Source Files

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