server

package
v0.5.6 Latest Latest
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 Go to latest Published: Sep 10, 2014 License: MIT Imports: 28 Imported by: 0

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Index

Constants

View Source 
const (
	// CLIENT is an end user.
	CLIENT = iota
	// ROUTER is another router in the cluster.
	ROUTER
)

Type of client

View Source 
const (
	// VERSION is the current version for the server.
	VERSION = "0.5.6"

	// DEFAULT_PORT is the deault port for client connections.
	DEFAULT_PORT = 4222

	// RANDOM_PORT is the value for port that, when supplied, will cause the
	// server to listen on a randomly-chosen available port. The resolved port
	// is available via the Addr() method.
	RANDOM_PORT = -1

	// DEFAULT_HOST defaults to all interfaces.
	DEFAULT_HOST = "0.0.0.0"

	// MAX_CONTROL_LINE_SIZE is the maximum allowed protocol control line size.
	// 1k should be plenty since payloads sans connect string are separate
	MAX_CONTROL_LINE_SIZE = 1024

	// MAX_PAYLOAD_SIZE is the maximum allowed payload size. Should be using
	// something different if > 1MB payloads are needed.
	MAX_PAYLOAD_SIZE = (1024 * 1024)

	// MAX_PENDING_SIZE is the maximum outbound size (in bytes) per client.
	MAX_PENDING_SIZE = (10 * 1024 * 1024)

	// DEFAULT_MAX_CONNECTIONS is the default maximum connections allowed.
	DEFAULT_MAX_CONNECTIONS = (64 * 1024)

	// SSL_TIMEOUT is the TLS/SSL wait time.
	SSL_TIMEOUT = 500 * time.Millisecond

	// AUTH_TIMEOUT is the authorization wait time.
	AUTH_TIMEOUT = 2 * SSL_TIMEOUT

	// DEFAULT_PING_INTERVAL is how often pings are sent to clients and routes.
	DEFAULT_PING_INTERVAL = 2 * time.Minute

	// DEFAULT_PING_MAX_OUT is maximum allowed pings outstanding before disconnect.
	DEFAULT_PING_MAX_OUT = 2

	// CRLF string
	CR_LF = "\r\n"

	// LEN_CR_LF hold onto the computed size.
	LEN_CR_LF = len(CR_LF)

	// DEFAULT_FLUSH_DEADLINE is the write/flush deadlines.
	DEFAULT_FLUSH_DEADLINE = 2 * time.Second

	// DEFAULT_HTTP_PORT is the default monitoring port.
	DEFAULT_HTTP_PORT = 8333

	// ACCEPT_MIN_SLEEP is the minimum acceptable sleep times on temporary errors.
	ACCEPT_MIN_SLEEP = 10 * time.Millisecond

	// ACCEPT_MAX_SLEEP is the maximum acceptable sleep times on temporary errors
	ACCEPT_MAX_SLEEP = 1 * time.Second

	// DEFAULT_ROUTE_CONNECT Route solicitation intervals.
	DEFAULT_ROUTE_CONNECT = 1 * time.Second

	// DEFAULT_ROUTE_RECONNECT Route reconnect intervals.
	DEFAULT_ROUTE_RECONNECT = 1 * time.Second

	// DEFAULT_ROUTE_DIAL Route dial timeout.
	DEFAULT_ROUTE_DIAL = 1 * time.Second

	// PROTO_SNIPPET_SIZE is the default size of proto to print on parse errors.
	PROTO_SNIPPET_SIZE = 32

	// MAX_MSG_ARGS Maximum possible number of arguments from MSG proto.
	MAX_MSG_ARGS = 4

	// MAX_PUB_ARGS Maximum possible number of arguments from PUB proto.
	MAX_PUB_ARGS = 3
)
View Source 
const (
	OP_START = iota
	OP_PLUS
	OP_PLUS_O
	OP_PLUS_OK
	OP_MINUS
	OP_MINUS_E
	OP_MINUS_ER
	OP_MINUS_ERR
	OP_MINUS_ERR_SPC
	MINUS_ERR_ARG
	OP_C
	OP_CO
	OP_CON
	OP_CONN
	OP_CONNE
	OP_CONNEC
	OP_CONNECT
	CONNECT_ARG
	OP_P
	OP_PU
	OP_PUB
	OP_PUB_SPC
	PUB_ARG
	OP_PI
	OP_PIN
	OP_PING
	OP_PO
	OP_PON
	OP_PONG
	MSG_PAYLOAD
	MSG_END
	OP_S
	OP_SU
	OP_SUB
	OP_SUB_SPC
	SUB_ARG
	OP_U
	OP_UN
	OP_UNS
	OP_UNSU
	OP_UNSUB
	UNSUB_ARG
	OP_M
	OP_MS
	OP_MSG
	OP_MSG_SPC
	MSG_ARG
	OP_I
	OP_IN
	OP_INF
	OP_INFO
	INFO_ARG
)
View Source 
const (
	RSID  = "RSID"
	QRSID = "QRSID"

	RSID_CID_INDEX   = 1
	RSID_SID_INDEX   = 2
	EXPECTED_MATCHES = 3
)

Variables

View Source 
var (
	// ErrConnectionClosed represents error condition on a closed connection.
	ErrConnectionClosed = errors.New("Connection closed")

	// ErrAuthorization represents error condition on failed authorization.
	ErrAuthorization = errors.New("Authorization Error")
)

Functions

func Debug 

func Debug(v ...interface{})

func Debugf 

func Debugf(format string, v ...interface{})

func Fatal 

func Fatal(v ...interface{})

func Fatalf 

func Fatalf(format string, v ...interface{})

func Log 

func Log(v ...interface{})

func LogSetup 

func LogSetup()

LogSetup will properly setup logging and the logging flags.

func Logf 

func Logf(format string, v ...interface{})

func PrintAndDie 

func PrintAndDie(msg string)

PrintAndDie is exported for access in other packages.

func PrintServerAndExit 

func PrintServerAndExit()

PrintServerAndExit will print our version and exit.

func RemoveSelfReference added in v0.5.6 

func RemoveSelfReference(routes []*url.URL) []*url.URL

func Trace 

func Trace(v ...interface{})

func Tracef 

func Tracef(format string, v ...interface{})

func Usage 

func Usage()

Usage will print out the flag options for the server.

Types

type ConnInfo 

type ConnInfo struct {
	Cid      uint64 `json:"cid"`
	IP       string `json:"ip"`
	Port     int    `json:"port"`
	Subs     uint32 `json:"subscriptions"`
	Pending  int    `json:"pending_size"`
	InMsgs   int64  `json:"in_msgs"`
	OutMsgs  int64  `json:"out_msgs"`
	InBytes  int64  `json:"in_bytes"`
	OutBytes int64  `json:"out_bytes"`
}

ConnInfo has detailed information on a per connection basis.

type Connz 

type Connz struct {
	NumConns int         `json:"num_connections"`
	Conns    []*ConnInfo `json:"connections"`
}

Connz represents detail information on current connections.

type Info 

type Info struct {
	ID           string `json:"server_id"`
	Version      string `json:"version"`
	Host         string `json:"host"`
	Port         int    `json:"port"`
	AuthRequired bool   `json:"auth_required"`
	SslRequired  bool   `json:"ssl_required"`
	MaxPayload   int    `json:"max_payload"`
}

Info is the information sent to clients to help them understand information about this server.

type Options 

type Options struct {
	Host               string        `json:"addr"`
	Port               int           `json:"port"`
	Trace              bool          `json:"-"`
	Debug              bool          `json:"-"`
	NoLog              bool          `json:"-"`
	NoSigs             bool          `json:"-"`
	Logtime            bool          `json:"-"`
	MaxConn            int           `json:"max_connections"`
	Username           string        `json:"user,omitempty"`
	Password           string        `json:"-"`
	Authorization      string        `json:"-"`
	PingInterval       time.Duration `json:"ping_interval"`
	MaxPingsOut        int           `json:"ping_max"`
	HTTPPort           int           `json:"http_port"`
	SslTimeout         float64       `json:"ssl_timeout"`
	AuthTimeout        float64       `json:"auth_timeout"`
	MaxControlLine     int           `json:"max_control_line"`
	MaxPayload         int           `json:"max_payload"`
	ClusterHost        string        `json:"addr"`
	ClusterPort        int           `json:"port"`
	ClusterUsername    string        `json:"-"`
	ClusterPassword    string        `json:"-"`
	ClusterAuthTimeout float64       `json:"auth_timeout"`
	Routes             []*url.URL    `json:"-"`
	ProfPort           int           `json:"-"`
	PidFile            string        `json:"-"`
	LogFile            string        `json:"-"`
}

Options block for gnatsd server.

func MergeOptions 

func MergeOptions(fileOpts, flagOpts *Options) *Options

MergeOptions will merge two options giving preference to the flagOpts if the item is present.

func ProcessConfigFile 

func ProcessConfigFile(configFile string) (*Options, error)

ProcessConfigFile processes a configuration file. FIXME(dlc): Hacky

type Server 

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

Server is our main struct.

func New 

func New(opts *Options) *Server

New will setup a new server struct after parsing the options.

func (*Server) AcceptLoop 

func (s *Server) AcceptLoop()

AcceptLoop is exported for easier testing.

func (*Server) Addr added in v0.5.4 

func (s *Server) Addr() net.Addr

Addr will return the net.Addr object for the current listener.

func (*Server) HandleConnz 

func (s *Server) HandleConnz(w http.ResponseWriter, r *http.Request)

HandleConnz process HTTP requests for connection information.

func (*Server) HandleVarz 

func (s *Server) HandleVarz(w http.ResponseWriter, r *http.Request)

HandleVarz will process HTTP requests for server information.

func (*Server) LogInit 

func (s *Server) LogInit()

LogInit parses option flags and sets up logging.

func (*Server) NumClients 

func (s *Server) NumClients() int

NumClients will report the number of registered clients.

func (*Server) NumRemotes 

func (s *Server) NumRemotes() int

NumRemotes will report number of registered remotes.

func (*Server) NumRoutes 

func (s *Server) NumRoutes() int

NumRoutes will report the number of registered routes.

func (*Server) NumSubscriptions 

func (s *Server) NumSubscriptions() uint32

NumSubscriptions will report how many subscriptions are active.

func (*Server) Shutdown 

func (s *Server) Shutdown()

Shutdown will shutdown the server instance by kicking out the AcceptLoop and closing all associated clients.

func (*Server) Start 

func (s *Server) Start()

Start up the server, this will block. Start via a Go routine if needed.

func (*Server) StartHTTPMonitoring 

func (s *Server) StartHTTPMonitoring()

StartHTTPMonitoring will enable the HTTP monitoring port.

func (*Server) StartProfiler 

func (s *Server) StartProfiler()

StartProfiler is called to enable dynamic profiling.

func (*Server) StartRouting 

func (s *Server) StartRouting()

StartRouting will start the accept loop on the cluster host:port and will actively try to connect to listed routes.

type Varz 

type Varz struct {
	Start       time.Time `json:"start"`
	Options     *Options  `json:"options"`
	Mem         int64     `json:"mem"`
	Cores       int       `json:"cores"`
	CPU         float64   `json:"cpu"`
	Connections int       `json:"connections"`
	InMsgs      int64     `json:"in_msgs"`
	OutMsgs     int64     `json:"out_msgs"`
	InBytes     int64     `json:"in_bytes"`
	OutBytes    int64     `json:"out_bytes"`
	Uptime      string    `json:"uptime"`
}

Varz will output server information on the monitoring port at /varz.

Source Files

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