valib/deliver.git

fix crash and add NewServerWithError return error

zhangmeng

2019-05-22 c2bbe31e7c6c9f83f7bcce26dea98bc18ed8f39c

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9d4b12	1	package deliver
Z	2
	3	import (
d23f54	4	"errors"
9d4b12	5	"fmt"
Z	6	"os"
	7	"strings"
9e1301	8	"time"
9d4b12	9
Z	10	"nanomsg.org/go-mangos"
	11	"nanomsg.org/go-mangos/protocol/bus"
	12	"nanomsg.org/go-mangos/protocol/pair"
	13	"nanomsg.org/go-mangos/protocol/pub"
	14	"nanomsg.org/go-mangos/protocol/pull"
	15	"nanomsg.org/go-mangos/protocol/push"
	16	"nanomsg.org/go-mangos/protocol/rep"
	17	"nanomsg.org/go-mangos/protocol/req"
	18	"nanomsg.org/go-mangos/protocol/respondent"
	19	"nanomsg.org/go-mangos/protocol/sub"
	20	"nanomsg.org/go-mangos/protocol/surveyor"
	21	"nanomsg.org/go-mangos/transport/all"
	22	)
	23
	24	// NNG mangos wrap
	25	type NNG struct {
9a89af	26	sock mangos.Socket
Z	27	typ td
	28	mode Mode
	29	url string
36766a	30
Z	31	arguments []interface{}
9d4b12	32	}
Z	33
	34	// Send impl interface Diliver
	35	func (n *NNG) Send(data []byte) error {
c2bbe3	36	if n == nil {
Z	37	return errors.New("please init NNG first")
	38	}
36766a	39	var err error
9d4b12	40	if n.sock == nil {
d23f54	41	n.sock, err = n.makeNNG(agent)
36766a	42	if err != nil {
d23f54	43	fmt.Println("create nng sender error")
36766a	44	return err
Z	45	}
9d4b12	46	}
Z	47
c0dcd1	48	if surveyorTime > 0 {
Z	49	time.Sleep(time.Duration(surveyorTime2) time.Second)
	50	}
	51
36766a	52	msg := mangos.NewMessage(len(data))
Z	53	msg.Body = data
	54	return n.sock.SendMsg(msg)
9e1301	55
9d4b12	56	}
Z	57
	58	// Recv impl interface Diliver
	59	func (n *NNG) Recv() ([]byte, error) {
c2bbe3	60	if n == nil {
Z	61	return nil, errors.New("please init NNG first")
	62	}
	63
36766a	64	var err error
Z	65
9d4b12	66	if n.sock == nil {
d23f54	67	n.sock, err = n.makeNNG(coactee)
36766a	68	if err != nil {
d23f54	69	fmt.Println("create nng reciever error")
5ff1f3	70	return nil, err
a6b23c	71	}
9d4b12	72	}
36766a	73
Z	74	var msg *mangos.Message
	75	if msg, err = n.sock.RecvMsg(); err != nil {
	76	return nil, err
	77	}
	78	return msg.Body, nil
	79
9d4b12	80	}
Z	81
aaae99	82	// Close impl interface Deliver
Z	83	func (n *NNG) Close() {
c2bbe3	84	if n != nil && n.sock != nil {
aaae99	85	n.sock.Close()
8e158e	86	n.sock = nil
aaae99	87	}
Z	88	}
	89
6887a3	90	func nngServer(m Mode, url string, args ...interface{}) *NNG {
9d4b12	91
Z	92	rmExistedIpcName(url)
	93
36766a	94	return &NNG{
9a89af	95	typ: agent,
36766a	96	mode: m,
Z	97	url: url,
	98	arguments: args,
	99	}
9d4b12	100	}
Z	101
6887a3	102	func nngClient(m Mode, url string, args ...interface{}) *NNG {
9d4b12	103
36766a	104	return &NNG{
9a89af	105	typ: coactee,
36766a	106	mode: m,
Z	107	url: url,
	108	arguments: args,
9d4b12	109	}
Z	110
36766a	111	}
Z	112
9893ed	113	func proto(typ td, m Mode) protocol {
d23f54	114	if typ == agent {
Z	115	return protoAgent(m)
	116	} else if typ == coactee {
	117	return protoCoactee(m)
36766a	118	}
d23f54	119	return NONE
36766a	120	}
Z	121
9893ed	122	func (n *NNG) makeNNG(typ td) (mangos.Socket, error) {
36766a	123
Z	124	var sock mangos.Socket
	125	var err error
	126
d23f54	127	switch n.mode {
Z	128	case Bus:
	129	sock, err = n.busMakeNNG(typ)
	130	case ReqRep:
	131	sock, err = n.rrMakeNNG(typ)
9e1301	132	default:
d23f54	133	sock, err = n.ppMakeNNG(typ)
9d4b12	134	}
Z	135
d23f54	136	return sock, err
9d4b12	137	}
Z	138
	139	func rmExistedIpcName(url string) {
	140	s := strings.Split(url, "://")
	141
	142	if s[0] == "ipc" {
	143	if _, err := os.Stat(s[1]); err == nil {
	144	os.Remove(s[1])
	145	}
	146	}
	147	}
	148
	149	// newSocket allocates a new Socket. The Socket is the handle used to
	150	// access the underlying library.
	151	func newSocket(p protocol) (mangos.Socket, error) {
	152
d23f54	153	if p == NONE {
Z	154	return nil, errors.New("new socket protocol none")
	155	}
9d4b12	156	var s mangos.Socket
Z	157	var err error
	158
	159	switch p {
	160	case PUB:
	161	s, err = pub.NewSocket()
	162	case SUB:
	163	s, err = sub.NewSocket()
	164	case PUSH:
	165	s, err = push.NewSocket()
	166	case PULL:
	167	s, err = pull.NewSocket()
	168	case REQ:
	169	s, err = req.NewSocket()
	170	case REP:
	171	s, err = rep.NewSocket()
	172	case SURVEYOR:
	173	s, err = surveyor.NewSocket()
	174	case RESPONDENT:
	175	s, err = respondent.NewSocket()
	176	case PAIR:
	177	s, err = pair.NewSocket()
	178	case BUS:
	179	s, err = bus.NewSocket()
	180	default:
	181	err = mangos.ErrBadProto
	182	}
	183
	184	if err != nil {
	185	return nil, err
	186	}
	187
	188	all.AddTransports(s)
	189
	190	return s, nil
	191	}
	192
	193	func die(format string, v ...interface{}) {
	194	fmt.Fprintln(os.Stderr, fmt.Sprintf(format, v...))
	195	os.Exit(1)
	196	}
	197
	198	// Protocol is the numeric abstraction to the various protocols or patterns
	199	// that Mangos supports.
	200	type protocol int
	201
	202	// Constants for protocols.
	203	const (
d23f54	204	NONE = -1
9d4b12	205	PUSH = protocol(mangos.ProtoPush)
Z	206	PULL = protocol(mangos.ProtoPull)
	207	PUB = protocol(mangos.ProtoPub)
	208	SUB = protocol(mangos.ProtoSub)
	209	REQ = protocol(mangos.ProtoReq)
	210	REP = protocol(mangos.ProtoRep)
	211	SURVEYOR = protocol(mangos.ProtoSurveyor)
	212	RESPONDENT = protocol(mangos.ProtoRespondent)
	213	BUS = protocol(mangos.ProtoBus)
	214	PAIR = protocol(mangos.ProtoPair)
	215	)
	216
d23f54	217	func protoAgent(m Mode) protocol {
9d4b12	218	switch m {
Z	219	case PushPull:
	220	return PUSH
	221	case PubSub:
	222	return PUB
	223	case Pair:
	224	return PAIR
d23f54	225	case SurvResp:
Z	226	return SURVEYOR
	227	case ReqRep:
	228	return REQ
	229	case Bus:
	230	return BUS
9d4b12	231	}
d23f54	232	return NONE
9d4b12	233	}
Z	234
d23f54	235	func protoCoactee(m Mode) protocol {
9d4b12	236	switch m {
Z	237	case PushPull:
	238	return PULL
	239	case PubSub:
	240	return SUB
	241	case Pair:
	242	return PAIR
d23f54	243	case SurvResp:
Z	244	return RESPONDENT
	245	case ReqRep:
	246	return REP
	247	case Bus:
	248	return BUS
9d4b12	249	}
d23f54	250	return NONE
9d4b12	251	}