unistack-org/micro
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rename service to router

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This commit is contained in:
Asim Aslam 2019-01-07 14:44:40 +00:00
parent fcc730931c
commit 46ece968d4
3 changed files with 81 additions and 71 deletions
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118
server/rpc_service.go → server/rpc_router.go
View File

@ -60,8 +60,8 @@ type response struct {
next *response // for free list in Server
}
// server represents an RPC Server.
type server struct {
// router represents an RPC router.
type router struct {
name string
mu sync.Mutex // protects the serviceMap
serviceMap map[string]*service
@ -72,6 +72,14 @@ type server struct {
hdlrWrappers []HandlerWrapper
}
func newRpcRouter(opts Options) *router {
return &router{
name: opts.Name,
hdlrWrappers: opts.HdlrWrappers,
serviceMap: make(map[string]*service),
}
}
// Is this an exported - upper case - name?
func isExported(name string) bool {
rune, _ := utf8.DecodeRuneInString(name)
@ -158,11 +166,11 @@ func prepareMethod(method reflect.Method) *methodType {
return &methodType{method: method, ArgType: argType, ReplyType: replyType, ContextType: contextType, stream: stream}
}
func (server *server) register(rcvr interface{}) error {
server.mu.Lock()
defer server.mu.Unlock()
if server.serviceMap == nil {
server.serviceMap = make(map[string]*service)
func (router *router) register(rcvr interface{}) error {
router.mu.Lock()
defer router.mu.Unlock()
if router.serviceMap == nil {
router.serviceMap = make(map[string]*service)
}
s := new(service)
s.typ = reflect.TypeOf(rcvr)
@ -176,7 +184,7 @@ func (server *server) register(rcvr interface{}) error {
log.Log(s)
return errors.New(s)
}
if _, present := server.serviceMap[sname]; present {
if _, present := router.serviceMap[sname]; present {
return errors.New("rpc: service already defined: " + sname)
}
s.name = sname
@ -195,12 +203,12 @@ func (server *server) register(rcvr interface{}) error {
log.Log(s)
return errors.New(s)
}
server.serviceMap[s.name] = s
router.serviceMap[s.name] = s
return nil
}
func (server *server) sendResponse(sending sync.Locker, req *request, reply interface{}, codec serverCodec, errmsg string, last bool) (err error) {
resp := server.getResponse()
func (router *router) sendResponse(sending sync.Locker, req *request, reply interface{}, codec serverCodec, errmsg string, last bool) (err error) {
resp := router.getResponse()
// Encode the response header
resp.ServiceMethod = req.ServiceMethod
if errmsg != "" {
@ -211,16 +219,16 @@ func (server *server) sendResponse(sending sync.Locker, req *request, reply inte
sending.Lock()
err = codec.WriteResponse(resp, reply, last)
sending.Unlock()
server.freeResponse(resp)
router.freeResponse(resp)
return err
}
func (s *service) call(ctx context.Context, server *server, sending *sync.Mutex, mtype *methodType, req *request, argv, replyv reflect.Value, codec serverCodec, ct string) {
func (s *service) call(ctx context.Context, router *router, sending *sync.Mutex, mtype *methodType, req *request, argv, replyv reflect.Value, codec serverCodec, ct string) {
function := mtype.method.Func
var returnValues []reflect.Value
r := &rpcRequest{
service: server.name,
service: router.name,
contentType: ct,
method: req.ServiceMethod,
}
@ -239,8 +247,8 @@ func (s *service) call(ctx context.Context, server *server, sending *sync.Mutex,
return nil
}
for i := len(server.hdlrWrappers); i > 0; i-- {
fn = server.hdlrWrappers[i-1](fn)
for i := len(router.hdlrWrappers); i > 0; i-- {
fn = router.hdlrWrappers[i-1](fn)
}
errmsg := ""
@ -249,11 +257,11 @@ func (s *service) call(ctx context.Context, server *server, sending *sync.Mutex,
errmsg = err.Error()
}
err = server.sendResponse(sending, req, replyv.Interface(), codec, errmsg, true)
err = router.sendResponse(sending, req, replyv.Interface(), codec, errmsg, true)
if err != nil {
log.Log("rpc call: unable to send response: ", err)
}
server.freeRequest(req)
router.freeRequest(req)
return
}
@ -284,8 +292,8 @@ func (s *service) call(ctx context.Context, server *server, sending *sync.Mutex,
}
}
for i := len(server.hdlrWrappers); i > 0; i-- {
fn = server.hdlrWrappers[i-1](fn)
for i := len(router.hdlrWrappers); i > 0; i-- {
fn = router.hdlrWrappers[i-1](fn)
}
// client.Stream request
@ -299,8 +307,8 @@ func (s *service) call(ctx context.Context, server *server, sending *sync.Mutex,
// this is the last packet, we don't do anything with
// the error here (well sendStreamResponse will log it
// already)
server.sendResponse(sending, req, nil, codec, errmsg, true)
server.freeRequest(req)
router.sendResponse(sending, req, nil, codec, errmsg, true)
router.freeRequest(req)
}
func (m *methodType) prepareContext(ctx context.Context) reflect.Value {
@ -310,66 +318,66 @@ func (m *methodType) prepareContext(ctx context.Context) reflect.Value {
return reflect.Zero(m.ContextType)
}
func (server *server) serveRequest(ctx context.Context, codec serverCodec, ct string) error {
func (router *router) serveRequest(ctx context.Context, codec serverCodec, ct string) error {
sending := new(sync.Mutex)
service, mtype, req, argv, replyv, keepReading, err := server.readRequest(codec)
service, mtype, req, argv, replyv, keepReading, err := router.readRequest(codec)
if err != nil {
if !keepReading {
return err
}
// send a response if we actually managed to read a header.
if req != nil {
server.sendResponse(sending, req, invalidRequest, codec, err.Error(), true)
server.freeRequest(req)
router.sendResponse(sending, req, invalidRequest, codec, err.Error(), true)
router.freeRequest(req)
}
return err
}
service.call(ctx, server, sending, mtype, req, argv, replyv, codec, ct)
service.call(ctx, router, sending, mtype, req, argv, replyv, codec, ct)
return nil
}
func (server *server) getRequest() *request {
server.reqLock.Lock()
req := server.freeReq
func (router *router) getRequest() *request {
router.reqLock.Lock()
req := router.freeReq
if req == nil {
req = new(request)
} else {
server.freeReq = req.next
router.freeReq = req.next
*req = request{}
}
server.reqLock.Unlock()
router.reqLock.Unlock()
return req
}
func (server *server) freeRequest(req *request) {
server.reqLock.Lock()
req.next = server.freeReq
server.freeReq = req
server.reqLock.Unlock()
func (router *router) freeRequest(req *request) {
router.reqLock.Lock()
req.next = router.freeReq
router.freeReq = req
router.reqLock.Unlock()
}
func (server *server) getResponse() *response {
server.respLock.Lock()
resp := server.freeResp
func (router *router) getResponse() *response {
router.respLock.Lock()
resp := router.freeResp
if resp == nil {
resp = new(response)
} else {
server.freeResp = resp.next
router.freeResp = resp.next
*resp = response{}
}
server.respLock.Unlock()
router.respLock.Unlock()
return resp
}
func (server *server) freeResponse(resp *response) {
server.respLock.Lock()
resp.next = server.freeResp
server.freeResp = resp
server.respLock.Unlock()
func (router *router) freeResponse(resp *response) {
router.respLock.Lock()
resp.next = router.freeResp
router.freeResp = resp
router.respLock.Unlock()
}
func (server *server) readRequest(codec serverCodec) (service *service, mtype *methodType, req *request, argv, replyv reflect.Value, keepReading bool, err error) {
service, mtype, req, keepReading, err = server.readRequestHeader(codec)
func (router *router) readRequest(codec serverCodec) (service *service, mtype *methodType, req *request, argv, replyv reflect.Value, keepReading bool, err error) {
service, mtype, req, keepReading, err = router.readRequestHeader(codec)
if err != nil {
if !keepReading {
return
@ -406,16 +414,16 @@ func (server *server) readRequest(codec serverCodec) (service *service, mtype *m
return
}
func (server *server) readRequestHeader(codec serverCodec) (service *service, mtype *methodType, req *request, keepReading bool, err error) {
func (router *router) readRequestHeader(codec serverCodec) (service *service, mtype *methodType, req *request, keepReading bool, err error) {
// Grab the request header.
req = server.getRequest()
req = router.getRequest()
err = codec.ReadRequestHeader(req, true)
if err != nil {
req = nil
if err == io.EOF || err == io.ErrUnexpectedEOF {
return
}
err = errors.New("rpc: server cannot decode request: " + err.Error())
err = errors.New("rpc: router cannot decode request: " + err.Error())
return
}
@ -429,9 +437,9 @@ func (server *server) readRequestHeader(codec serverCodec) (service *service, mt
return
}
// Look up the request.
server.mu.Lock()
service = server.serviceMap[serviceMethod[0]]
server.mu.Unlock()
router.mu.Lock()
service = router.serviceMap[serviceMethod[0]]
router.mu.Unlock()
if service == nil {
err = errors.New("rpc: can't find service " + req.ServiceMethod)
return

28
server/rpc_server.go
View File

@ -21,8 +21,8 @@ import (
)
type rpcServer struct {
rpc *server
exit chan chan error
router *router
exit chan chan error
sync.RWMutex
opts Options
@ -37,12 +37,8 @@ type rpcServer struct {
func newRpcServer(opts ...Option) Server {
options := newOptions(opts...)
return &rpcServer{
opts: options,
rpc: &server{
name: options.Name,
serviceMap: make(map[string]*service),
hdlrWrappers: options.HdlrWrappers,
},
opts: options,
router: newRpcRouter(options),
handlers: make(map[string]Handler),
subscribers: make(map[*subscriber][]broker.Subscriber),
exit: make(chan chan error),
@ -111,7 +107,7 @@ func (s *rpcServer) accept(sock transport.Socket) {
}
// TODO: needs better error handling
if err := s.rpc.serveRequest(ctx, codec, ct); err != nil {
if err := s.router.serveRequest(ctx, codec, ct); err != nil {
s.wg.Done()
log.Logf("Unexpected error serving request, closing socket: %v", err)
return
@ -142,12 +138,12 @@ func (s *rpcServer) Init(opts ...Option) error {
for _, opt := range opts {
opt(&s.opts)
}
// update internal server
s.rpc = &server{
name: s.opts.Name,
serviceMap: s.rpc.serviceMap,
hdlrWrappers: s.opts.HdlrWrappers,
}
// update router
r := newRpcRouter(s.opts)
r.serviceMap = s.router.serviceMap
s.router = r
s.Unlock()
return nil
}
@ -160,7 +156,7 @@ func (s *rpcServer) Handle(h Handler) error {
s.Lock()
defer s.Unlock()
if err := s.rpc.register(h.Handler()); err != nil {
if err := s.router.register(h.Handler()); err != nil {
return err
}

6
server/server.go
View File

@ -27,6 +27,11 @@ type Server interface {
String() string
}
// Router handle serving messages
type Router interface {
ServeRequest(context.Context, Stream) error
}
// Message is an async message interface
type Message interface {
Topic() string
@ -97,6 +102,7 @@ var (
DefaultVersion = "1.0.0"
DefaultId = uuid.New().String()
DefaultServer Server = newRpcServer()
DefaultRouter = newRpcRouter(newOptions())
)
// DefaultOptions returns config options for the default service