channel2

package
v0.15.5 Latest Latest
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 Go to latest Published: Jan 21, 2021 License: Apache-2.0 Imports: 23 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	ConnectionIdHeader              = 0
	ReplyForHeader                  = 1
	ResultSuccessHeader             = 2
	HelloRouterAdvertisementsHeader = 3
	HelloVersionHeader              = 4

	// Headers in the range 128-255 inclusive will be reflected when creating replies
	ReflectedHeaderBitMask = 1 << 7
	MaxReflectedHeader     = (1 << 8) - 1
)

*

  • Message headers notes
  • 0-127 reserved for channel
  • 128-255 reserved for headers that need to be reflected back to sender on responses
  • 128 is used for a message UUID for tracing
  • 1000-1099 reserved for edge messages
  • 1100-1199 is reserved for control plane messages
  • 2000-2500 is reserved for xgress messages
  • 2000-2255 is reserved for xgress implementation headers
View Source 
const (
	ContentTypeHelloType   = 0
	ContentTypePingType    = 1
	ContentTypeResultType  = 2
	ContentTypeLatencyType = 3
)
View Source 
const (
	Highest  = 0
	High     = 1024
	Standard = 4096
	Low      = 10240
)
View Source 
const AnyContentType = -1
View Source 
const DECODER = "channel"
View Source 
const DecoderFieldName = "__decoder__"
View Source 
const HelloSequence = -1
View Source 
const MessageFieldName = "__message__"

Variables

View Source 
var ListenerClosedError = listenerClosedError{}
View Source 
var UnknownVersionError = errors.New("channel synchronization error, bad magic number")

Functions

func DecodeTraceAndFormat 

func DecodeTraceAndFormat(decode []byte) string

func NewWSListener added in v0.14.16 

func NewWSListener(peer transport.Connection) *wsListener

Types

type BindHandler 

type BindHandler interface {
	BindChannel(ch Channel) error
}

type Binding 

type Binding interface {
	Bind(h BindHandler) error
	AddPeekHandler(h PeekHandler)
	AddTransformHandler(h TransformHandler)
	AddReceiveHandler(h ReceiveHandler)
	AddErrorHandler(h ErrorHandler)
	AddCloseHandler(h CloseHandler)
	SetUserData(data interface{})
	GetUserData() interface{}
}

Binding is used to add handlers to Channel.

NOTE: It is intended that the Add* methods are used at initial channel setup, and not invoked on an in-service Channel. This API may change in the future to enforce those semantics programmatically.

type Channel 

type Channel interface {
	Identity
	SetLogicalName(logicalName string)
	Binding
	Sender
	io.Closer
	IsClosed() bool
	Underlay() Underlay
}

Channel represents an asyncronous, message-passing framework, designed to sit on top of an underlay.

func NewChannel 

func NewChannel(logicalName string, underlayFactory UnderlayFactory, options *Options) (Channel, error)

func NewChannelWithTransportConfiguration added in v0.11.17 

func NewChannelWithTransportConfiguration(logicalName string, underlayFactory UnderlayFactory, options *Options, tcfg transport.Configuration) (Channel, error)

type CloseHandler 

type CloseHandler interface {
	HandleClose(ch Channel)
}

type ConnectOptions 

type ConnectOptions struct {
	MaxQueuedConnects      int
	MaxOutstandingConnects int
	ConnectTimeoutMs       int
}

func DefaultConnectOptions 

func DefaultConnectOptions() ConnectOptions

func (*ConnectOptions) ConnectTimeout 

func (co *ConnectOptions) ConnectTimeout() time.Duration

func (*ConnectOptions) Validate 

func (co *ConnectOptions) Validate() error

type ConnectionHandler 

type ConnectionHandler interface {
	HandleConnection(hello *Hello, certificates []*x509.Certificate) error
}

type Decoder 

type Decoder struct{}

func (Decoder) Decode 

func (d Decoder) Decode(msg *Message) ([]byte, bool)

type ErrorHandler 

type ErrorHandler interface {
	HandleError(err error, ch Channel)
}

type Hello 

type Hello struct {
	IdToken string
	Headers map[int32][]byte
}

func UnmarshalHello 

func UnmarshalHello(message *Message) *Hello

type Identity 

type Identity interface {
	// The TokenId used to represent the identity of this channel to lower-level resources.
	//
	Id() *identity.TokenId

	// The LogicalName represents the purpose or usage of this channel (i.e. 'ctrl', 'mgmt' 'r/001', etc.) Usually used
	// by humans in understand the logical purpose of a channel.
	//
	LogicalName() string

	// The ConnectionId represents the identity of this Channel to internal API components ("instance identifier").
	// Usually used by the Channel framework to differentiate Channel instances.
	//
	ConnectionId() string

	// Certificates contains the identity certificates provided by the peer.
	//
	Certificates() []*x509.Certificate

	// Label constructs a consistently-formatted string used for context logging purposes, from the components above.
	//
	Label() string
}

type LatencyHandler 

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

LatencyHandler responds to latency messages with Result messages.

func (*LatencyHandler) ContentType 

func (h *LatencyHandler) ContentType() int32

func (*LatencyHandler) HandleReceive 

func (h *LatencyHandler) HandleReceive(msg *Message, ch Channel)

type MemoryContext 

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

func NewMemoryContext 

func NewMemoryContext() *MemoryContext

type Message 

type Message struct {
	MessageHeader
	Body []byte
}

func NewHello 

func NewHello(idToken string, attributes map[int32][]byte) *Message

func NewMessage 

func NewMessage(contentType int32, body []byte) *Message

func NewResult 

func NewResult(success bool, message string) *Message

func ReadWSMessage added in v0.14.16 

func ReadWSMessage(peer io.Reader) (*Message, error)

func (*Message) ReplyTo 

func (m *Message) ReplyTo(o *Message)

func (*Message) String 

func (m *Message) String() string

type MessageHeader 

type MessageHeader struct {
	ContentType int32

	Headers map[int32][]byte
	// contains filtered or unexported fields
}

func (*MessageHeader) GetBoolHeader 

func (header *MessageHeader) GetBoolHeader(key int32) (bool, bool)

func (*MessageHeader) GetByteHeader added in v0.14.8 

func (header *MessageHeader) GetByteHeader(key int32) (byte, bool)

func (*MessageHeader) GetStringHeader 

func (header *MessageHeader) GetStringHeader(key int32) (string, bool)

func (*MessageHeader) GetUint16Header 

func (header *MessageHeader) GetUint16Header(key int32) (uint16, bool)

func (*MessageHeader) GetUint32Header 

func (header *MessageHeader) GetUint32Header(key int32) (uint32, bool)

func (*MessageHeader) GetUint64Header 

func (header *MessageHeader) GetUint64Header(key int32) (uint64, bool)

func (*MessageHeader) IsReply 

func (header *MessageHeader) IsReply() bool

func (*MessageHeader) IsReplyingTo 

func (header *MessageHeader) IsReplyingTo(sequence int32) bool

func (*MessageHeader) PutBoolHeader 

func (header *MessageHeader) PutBoolHeader(key int32, value bool)

func (*MessageHeader) PutByteHeader added in v0.14.8 

func (header *MessageHeader) PutByteHeader(key int32, value byte)

func (*MessageHeader) PutUint16Header 

func (header *MessageHeader) PutUint16Header(key int32, value uint16)

func (*MessageHeader) PutUint32Header 

func (header *MessageHeader) PutUint32Header(key int32, value uint32)

func (*MessageHeader) PutUint64Header 

func (header *MessageHeader) PutUint64Header(key int32, value uint64)

func (*MessageHeader) ReplyFor 

func (header *MessageHeader) ReplyFor() int32

func (*MessageHeader) Sequence 

func (header *MessageHeader) Sequence() int32

type NoopTestChannel added in v0.14.23 

type NoopTestChannel struct {
}

func (*NoopTestChannel) AddCloseHandler added in v0.14.23 

func (ch *NoopTestChannel) AddCloseHandler(CloseHandler)

func (*NoopTestChannel) AddErrorHandler added in v0.14.23 

func (ch *NoopTestChannel) AddErrorHandler(ErrorHandler)

func (*NoopTestChannel) AddPeekHandler added in v0.14.23 

func (ch *NoopTestChannel) AddPeekHandler(PeekHandler)

func (*NoopTestChannel) AddReceiveHandler added in v0.14.23 

func (ch *NoopTestChannel) AddReceiveHandler(ReceiveHandler)

func (*NoopTestChannel) AddTransformHandler added in v0.14.23 

func (ch *NoopTestChannel) AddTransformHandler(TransformHandler)

func (*NoopTestChannel) Bind added in v0.14.23 

func (ch *NoopTestChannel) Bind(BindHandler) error

func (*NoopTestChannel) Certificates added in v0.14.23 

func (ch *NoopTestChannel) Certificates() []*x509.Certificate

func (*NoopTestChannel) Close added in v0.14.23 

func (ch *NoopTestChannel) Close() error

func (*NoopTestChannel) ConnectionId added in v0.14.23 

func (ch *NoopTestChannel) ConnectionId() string

func (*NoopTestChannel) GetUserData added in v0.14.23 

func (ch *NoopTestChannel) GetUserData() interface{}

func (*NoopTestChannel) Id added in v0.14.23 

func (ch *NoopTestChannel) Id() *identity.TokenId

func (*NoopTestChannel) IsClosed added in v0.14.23 

func (ch *NoopTestChannel) IsClosed() bool

func (*NoopTestChannel) Label added in v0.14.23 

func (ch *NoopTestChannel) Label() string

func (*NoopTestChannel) LogicalName added in v0.14.23 

func (ch *NoopTestChannel) LogicalName() string

func (*NoopTestChannel) Send added in v0.14.23 

func (ch *NoopTestChannel) Send(*Message) error

func (*NoopTestChannel) SendAndSync added in v0.14.23 

func (ch *NoopTestChannel) SendAndSync(m *Message) (chan error, error)

func (*NoopTestChannel) SendAndSyncWithPriority added in v0.14.23 

func (ch *NoopTestChannel) SendAndSyncWithPriority(*Message, Priority) (chan error, error)

func (*NoopTestChannel) SendAndWait added in v0.14.23 

func (ch *NoopTestChannel) SendAndWait(*Message) (chan *Message, error)

func (*NoopTestChannel) SendAndWaitWithPriority added in v0.14.23 

func (ch *NoopTestChannel) SendAndWaitWithPriority(*Message, Priority) (chan *Message, error)

func (*NoopTestChannel) SendAndWaitWithTimeout added in v0.14.23 

func (ch *NoopTestChannel) SendAndWaitWithTimeout(*Message, time.Duration) (*Message, error)

func (*NoopTestChannel) SendForReply added in v0.14.23 

func (ch *NoopTestChannel) SendForReply(TypedMessage, time.Duration) (*Message, error)

func (*NoopTestChannel) SendForReplyAndDecode added in v0.14.23 

func (ch *NoopTestChannel) SendForReplyAndDecode(TypedMessage, time.Duration, TypedMessage) error

func (*NoopTestChannel) SendPrioritizedAndWaitWithTimeout added in v0.14.23 

func (ch *NoopTestChannel) SendPrioritizedAndWaitWithTimeout(*Message, Priority, time.Duration) (*Message, error)

func (*NoopTestChannel) SendPrioritizedWithTimeout added in v0.14.23 

func (ch *NoopTestChannel) SendPrioritizedWithTimeout(*Message, Priority, time.Duration) error

func (*NoopTestChannel) SendWithPriority added in v0.14.23 

func (ch *NoopTestChannel) SendWithPriority(*Message, Priority) error

func (*NoopTestChannel) SendWithTimeout added in v0.14.23 

func (ch *NoopTestChannel) SendWithTimeout(*Message, time.Duration) error

func (*NoopTestChannel) SetLogicalName added in v0.14.23 

func (ch *NoopTestChannel) SetLogicalName(string)

func (*NoopTestChannel) SetUserData added in v0.14.23 

func (ch *NoopTestChannel) SetUserData(interface{})

func (*NoopTestChannel) Underlay added in v0.14.23 

func (ch *NoopTestChannel) Underlay() Underlay

type Options 

type Options struct {
	OutQueueSize int
	BindHandlers []BindHandler
	PeekHandlers []PeekHandler
	ConnectOptions
}

func DefaultOptions 

func DefaultOptions() *Options

func LoadOptions 

func LoadOptions(data map[interface{}]interface{}) *Options

func (Options) String 

func (o Options) String() string

type PeekHandler 

type PeekHandler interface {
	Connect(ch Channel, remoteAddress string)
	Rx(m *Message, ch Channel)
	Tx(m *Message, ch Channel)
	Close(ch Channel)
}

type Priority 

type Priority uint32

type ReceiveHandler 

type ReceiveHandler interface {
	ContentType() int32
	HandleReceive(m *Message, ch Channel)
}

type Result 

type Result struct {
	Success bool
	Message string
}

func UnmarshalResult 

func UnmarshalResult(message *Message) *Result

type Sender 

type Sender interface {
	Send(m *Message) error
	SendWithPriority(m *Message, p Priority) error
	SendAndSync(m *Message) (chan error, error)
	SendAndSyncWithPriority(m *Message, p Priority) (chan error, error)
	SendWithTimeout(m *Message, timeout time.Duration) error
	SendPrioritizedWithTimeout(m *Message, p Priority, timeout time.Duration) error
	SendAndWaitWithTimeout(m *Message, timeout time.Duration) (*Message, error)
	SendPrioritizedAndWaitWithTimeout(m *Message, p Priority, timeout time.Duration) (*Message, error)
	SendAndWait(m *Message) (chan *Message, error)
	SendAndWaitWithPriority(m *Message, p Priority) (chan *Message, error)
	SendForReply(msg TypedMessage, timeout time.Duration) (*Message, error)
	SendForReplyAndDecode(msg TypedMessage, timeout time.Duration, result TypedMessage) error
}

type TraceHandler 

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

func NewTraceHandler 

func NewTraceHandler(path string, id *identity.TokenId) (*TraceHandler, error)

func (*TraceHandler) AddDecoder 

func (h *TraceHandler) AddDecoder(decoder TraceMessageDecoder)

func (TraceHandler) Close 

func (h TraceHandler) Close(ch Channel)

func (*TraceHandler) Connect 

func (h *TraceHandler) Connect(ch Channel, remoteAddress string)

func (TraceHandler) Rx 

func (h TraceHandler) Rx(msg *Message, ch Channel)

func (TraceHandler) Tx 

func (h TraceHandler) Tx(msg *Message, ch Channel)

type TraceMessageDecode 

type TraceMessageDecode map[string]interface{}

func NewTraceMessageDecode 

func NewTraceMessageDecode(decoder, message string) TraceMessageDecode

func (TraceMessageDecode) MarshalTraceMessageDecode 

func (d TraceMessageDecode) MarshalTraceMessageDecode() ([]byte, error)

type TraceMessageDecoder 

type TraceMessageDecoder interface {
	Decode(msg *Message) ([]byte, bool)
}

type TransformHandler 

type TransformHandler interface {
	Rx(m *Message, ch Channel)
	Tx(m *Message, ch Channel)
}

type TypedMessage 

type TypedMessage interface {
	proto.Message
	GetContentType() int32
}

type Underlay 

type Underlay interface {
	Rx() (*Message, error)
	Tx(m *Message) error
	Identity
	io.Closer
	IsClosed() bool
	Headers() map[int32][]byte
}

Underlay abstracts a physical communications channel, typically sitting on top of 'transport'.

type UnderlayFactory 

type UnderlayFactory interface {
	Create(tcfg transport.Configuration) (Underlay, error)
}

UnderlayFactory is used by Channel to obtain an Underlay instance. An underlay "dialer" or "listener" implement UnderlayFactory, to provide instances to Channel.

func NewClassicDialer 

func NewClassicDialer(identity *identity.TokenId, endpoint transport.Address, headers map[int32][]byte) UnderlayFactory

func NewMemoryDialer 

func NewMemoryDialer(identity *identity.TokenId, headers map[int32][]byte, ctx *MemoryContext) UnderlayFactory

func NewReconnectingDialer 

func NewReconnectingDialer(identity *identity.TokenId, endpoint transport.Address, headers map[int32][]byte) UnderlayFactory

type UnderlayListener 

type UnderlayListener interface {
	Listen(handlers ...ConnectionHandler) error
	UnderlayFactory
	io.Closer
}

UnderlayListener represents a component designed to listen for incoming peer connections.

func NewClassicListener 

func NewClassicListener(identity *identity.TokenId, endpoint transport.Address, connectOptions ConnectOptions, headers map[int32][]byte) UnderlayListener

func NewClassicListenerWithTransportConfiguration added in v0.11.17 

func NewClassicListenerWithTransportConfiguration(identity *identity.TokenId, endpoint transport.Address, connectOptions ConnectOptions, tcfg transport.Configuration, headers map[int32][]byte) UnderlayListener

func NewMemoryListener 

func NewMemoryListener(identity *identity.TokenId, ctx *MemoryContext) UnderlayListener

type UnsupportedVersionError 

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

func (UnsupportedVersionError) Error 

func (u UnsupportedVersionError) Error() string

Source Files

View all Source files

Directories

Path Synopsis
cmd
channel2
channel2/subcmd
channel2/subcmd/memory
channel2/subcmd/underlay

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