protocols

package
v0.0.0-...-c8b15d8 Latest Latest
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 Go to latest Published: Nov 20, 2018 License: MIT Imports: 11 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	CodeOK = iota
	CodeError
)
View Source 
const (
	ErrorChanBuffer = 16
	SendTimeout     = 1 * time.Second
)
View Source 
const (
	DefaultRetries = 3
)
View Source 
const (
	DefaultTimeout = 1 * time.Second
)

Variables

View Source 
var (
	DefaultTransport = TcpTransport()
)

Functions

func NewMiniProtocol 

func NewMiniProtocol(fragment ProtocolFragment) *protocol

func NewMiniProtocolTransport 

func NewMiniProtocolTransport(fragment ProtocolFragment, transport TransportProvider) *protocol

func NewProtocol 

func NewProtocol(name string, fragments ...ProtocolFragment) (*protocol, error)

func NewProtocolTransport 

func NewProtocolTransport(name string, transport TransportProvider, fragments ...ProtocolFragment) (*protocol, error)

func ParseServerFlags 

func ParseServerFlags(default_ip string, default_port int) string

Types

type Addr 

type Addr interface {
	net.Addr
	IP() net.IP
}

type CircuitBreaker 

type CircuitBreaker interface {
	Client

	Error() error
	Online() bool
	AddCallback(callback FaultDetectorCallback, key interface{})
}

func NewCircuitBreaker 

func NewCircuitBreaker(client Client, detector FaultDetector) (CircuitBreaker, error)

func NewCircuitBreakerOn 

func NewCircuitBreakerOn(protocol Protocol, detector FaultDetector) (CircuitBreaker, error)

type Client 

type Client interface {
	Close() error
	Closed() bool
	ResetConnection() // Will open new connection next time it's required

	SetServer(server_addr string) error
	Server() Addr
	SetTimeout(timeout time.Duration)
	Protocol() Protocol
	String() string

	SendPacket(packet *Packet) error
	Send(code Code, val interface{}) error
	SendRequest(code Code, val interface{}) (*Packet, error)
	SendRequestPacket(packet *Packet) (reply *Packet, err error)
	CheckReply(reply *Packet) error
	CheckError(reply *Packet, expectedCode Code) error
}

func NewClient 

func NewClient(protocol Protocol) Client

func NewClientFor 

func NewClientFor(server string, protocol Protocol) (Client, error)

func NewMiniClient 

func NewMiniClient(fragment ProtocolFragment) Client

func NewMiniClientFor 

func NewMiniClientFor(server_addr string, fragment ProtocolFragment) (Client, error)

type Code 

type Code uint

type Conn 

type Conn interface {
	Send(packet *Packet, timeout time.Duration) error
	UnreliableSend(packet *Packet) error
	Receive(timeout time.Duration) (*Packet, error)

	RemoteAddr() Addr
	LocalAddr() Addr
	Close() error
}

type Decoder 

type Decoder func(decoder *gob.Decoder) (interface{}, error)

type DecoderMap 

type DecoderMap map[Code]Decoder

type FaultDetector 

type FaultDetector interface {
	Close() error
	Check()

	// Implemented by *FaultDetectorBase
	Error() error
	Online() bool
	ErrorDetected(err error)
	ObservedServer() Addr
	AddCallback(callback FaultDetectorCallback, key interface{})
}

type FaultDetectorBase 

type FaultDetectorBase struct {
	Closed golib.StopChan
	// contains filtered or unexported fields
}

func NewFaultDetectorBase 

func NewFaultDetectorBase(observedProtocol Protocol, server Addr) *FaultDetectorBase

func (*FaultDetectorBase) AddCallback 

func (detector *FaultDetectorBase) AddCallback(callback FaultDetectorCallback, key interface{})

func (*FaultDetectorBase) Error 

func (detector *FaultDetectorBase) Error() (err error)

func (*FaultDetectorBase) ErrorDetected 

func (detector *FaultDetectorBase) ErrorDetected(err error)

func (*FaultDetectorBase) InvokeCallback 

func (detector *FaultDetectorBase) InvokeCallback(wasOnline bool)

func (*FaultDetectorBase) LoopCheck 

func (detector *FaultDetectorBase) LoopCheck(checker func(), timeout time.Duration)

func (*FaultDetectorBase) ObservedServer 

func (detector *FaultDetectorBase) ObservedServer() Addr

func (*FaultDetectorBase) Online 

func (detector *FaultDetectorBase) Online() bool

func (*FaultDetectorBase) PerformCheck 

func (detector *FaultDetectorBase) PerformCheck(checker func() error)

type FaultDetectorCallback 

type FaultDetectorCallback func(key interface{})

type Listener 

type Listener interface {
	Accept() (Conn, error)
	LocalAddr() Addr
	Close() error
}

type MarshallingProvider 

type MarshallingProvider interface {
	MarshalPacket(packet *Packet) ([]byte, error)
	UnmarshalPacket([]byte, Protocol) (*Packet, error)
}
var (
	Marshaller MarshallingProvider = gobMarshaller
)

type Packet 

type Packet struct {
	Code       Code
	Val        interface{}
	SourceAddr Addr
}

func (*Packet) String 

func (packet *Packet) String() string

type Plugin 

type Plugin interface {
	Start(server *PluginServer)
	Stop() error

	// Create and fully initialize new session. The param data is passed from
	// plugin to plugin, enabling one plugin to modify the input data for the next plugin.
	// Modify param if necessary and copy values from it. Do not store it.
	NewSession(param SessionParameter) (PluginSessionHandler, error)
}

type PluginServer 

type PluginServer struct {
	*Server

	SessionStartedCallback func(session *PluginSession)
	SessionStoppedCallback func(session *PluginSession)
	// contains filtered or unexported fields
}

func NewPluginServer 

func NewPluginServer(server *Server) *PluginServer

func (*PluginServer) AddPlugin 

func (server *PluginServer) AddPlugin(plugin Plugin)

func (*PluginServer) DeleteSession 

func (server *PluginServer) DeleteSession(client string) error

func (*PluginServer) NewSession 

func (server *PluginServer) NewSession(param SessionParameter) error

func (*PluginServer) StopServer 

func (server *PluginServer) StopServer()

func (*PluginServer) StopSession 

func (server *PluginServer) StopSession(client string) error

type PluginSession 

type PluginSession struct {
	Base    *SessionBase
	Client  string // From the originating SessionParameter
	Server  *PluginServer
	Plugins []PluginSessionHandler
}

func (*PluginSession) Cleanup 

func (session *PluginSession) Cleanup()

func (*PluginSession) Start 

func (session *PluginSession) Start(base *SessionBase)

func (*PluginSession) Tasks 

func (session *PluginSession) Tasks() (result []golib.Task)

type PluginSessionHandler 

type PluginSessionHandler interface {
	Start(sendingSession PluginSessionHandler)
	Tasks() []golib.Task
	Cleanup() error
	String() string
}

type Protocol 

type Protocol interface {
	Name() string
	CheckIncludesFragment(fragmentName string) error
	Transport() TransportProvider
	// contains filtered or unexported methods
}

type ProtocolFragment 

type ProtocolFragment interface {
	Name() string
	Decoders() DecoderMap
}

type Server 

type Server struct {
	Stopped bool
	// contains filtered or unexported fields
}

func NewServer 

func NewServer(addr_string string, protocol Protocol) (*Server, error)

func (*Server) Errors 

func (server *Server) Errors() <-chan error

func (*Server) LocalAddr 

func (server *Server) LocalAddr() Addr

func (*Server) LogError 

func (server *Server) LogError(err error)

func (*Server) Protocol 

func (server *Server) Protocol() Protocol

func (*Server) RegisterHandlers 

func (server *Server) RegisterHandlers(handlers ServerHandlerMap) error

func (*Server) RegisterStopHandler 

func (server *Server) RegisterStopHandler(handler ServerStopper)

func (*Server) Reply 

func (server *Server) Reply(code Code, value interface{}) *Packet

func (*Server) ReplyCheck 

func (server *Server) ReplyCheck(err error) *Packet

func (*Server) ReplyError 

func (server *Server) ReplyError(err error) *Packet

func (*Server) ReplyOK 

func (server *Server) ReplyOK() *Packet

func (*Server) Start 

func (server *Server) Start(wg *sync.WaitGroup) golib.StopChan

func (*Server) Stop 

func (server *Server) Stop()

func (*Server) String 

func (server *Server) String() string

type ServerHandlerMap 

type ServerHandlerMap map[Code]ServerRequestHandler

type ServerProtocolFragment 

type ServerProtocolFragment interface {
	ProtocolFragment
	ServerHandlers(server *Server) ServerHandlerMap
}

If a ProtocolFragment implements this, the returned handlers will be automatically added to a Server

type ServerRequestHandler 

type ServerRequestHandler func(packet *Packet) (reply *Packet)

type ServerStopper 

type ServerStopper func()

type Session 

type Session interface {
	Start(base *SessionBase)
	Tasks() []golib.Task
	Cleanup()
}

type SessionBase 

type SessionBase struct {
	Wg         *sync.WaitGroup
	Stopped    golib.StopChan
	CleanupErr error
	Session    Session
}

func (*SessionBase) Stop 

func (base *SessionBase) Stop()

func (*SessionBase) StopAndFormatError 

func (base *SessionBase) StopAndFormatError() error

type SessionParameter 

type SessionParameter interface {
	// This string will be used as key in the sessions dictionary
	Client() string
}

type Sessions 

type Sessions map[interface{}]*SessionBase

func (Sessions) DeleteSession 

func (sessions Sessions) DeleteSession(key interface{}) error

func (Sessions) DeleteSessions 

func (sessions Sessions) DeleteSessions() error

func (Sessions) Get 

func (sessions Sessions) Get(key interface{}) Session

func (Sessions) ReKeySession 

func (sessions Sessions) ReKeySession(oldKey, newKey interface{}) (*SessionBase, error)

func (Sessions) StartSession 

func (sessions Sessions) StartSession(key interface{}, session Session)

func (Sessions) StopSession 

func (sessions Sessions) StopSession(key interface{}) error

type TransportProvider 

type TransportProvider interface {
	Resolve(addr string) (Addr, error)
	ResolveIP(ip string) (Addr, error)
	ResolveLocal(remote_addr string) (Addr, error)
	Listen(local Addr, protocol Protocol) (Listener, error)
	Dial(remote Addr, protocol Protocol) (Conn, error)
	String() string
}

func TcpTransport 

func TcpTransport() TransportProvider

func UdpTransport 

func UdpTransport() TransportProvider

func UdpTransportB 

func UdpTransportB(bufferSize int) TransportProvider

Source Files

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