/
domain.go
139 lines (109 loc) · 2.61 KB
/
domain.go
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package goa
import (
"errors"
"net"
"sync"
"github.com/jimenezrick/goa/log"
)
type Domain struct {
name string
mtx sync.RWMutex
bindings map[string]*Binding
}
var (
ErrNoRoute = errors.New("nonexistent route")
goaExit = make(chan struct{})
domainsMtx sync.Mutex
domains = make(map[string]*Domain)
)
func Exit() {
goaExit <- struct{}{}
}
func WaitExit() {
<-goaExit
}
func newDomain(name string) *Domain {
return &Domain{
name: name,
bindings: make(map[string]*Binding),
}
}
func GetDomain(name string) *Domain {
domainsMtx.Lock()
defer domainsMtx.Unlock()
dom, ok := domains[name]
if !ok {
dom = newDomain(name)
domains[name] = dom
}
return dom
}
func (d *Domain) AddRoute(service, address string) error {
d.mtx.Lock()
defer d.mtx.Unlock()
r := newRoute(address)
if err := r.connect(); err != nil {
return err
}
if b, ok := d.bindings[service]; ok {
b.routes = append(b.routes, r)
} else {
d.bindings[service] = newBinding(r)
}
return nil
}
func (d *Domain) Bind(service string) (*ClientBinding, error) {
d.mtx.RLock()
defer d.mtx.RUnlock()
b, ok := d.bindings[service]
if !ok {
return nil, ErrNoRoute
}
return newClientBinding(b), nil
}
// ///////////////////////////////////////////////////////////////////////////////////////
// XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX
// ///////////////////////////////////////////////////////////////////////////////////////
func (d *Domain) Announce(service string, handler func([]byte, uint64) ([]byte, uint64)) error {
lis, err := net.Listen("tcp", ":8000")
if err != nil {
return err
}
//
// TODO: Optimize with batching like the client side, with two goroutines
// The define callback can do whatever the user wants, to send the
// request to a worker pool through a channel o handle it directly on the
// goroutine that receive the messages.
//
go func() {
for {
netconn, err := lis.Accept()
if err != nil {
log.Debug(err)
}
log.Debug("Connection accepted from", netconn.RemoteAddr())
conn := newConn(netconn)
go func() {
reqs := make([]*Request, 0, maxBatchLen)
for {
reqs = reqs[:0:cap(reqs)]
for i := 0; i < maxBatchLen; i++ {
payld, seq, err := conn.recv()
if err != nil {
log.Debug(err)
Exit()
}
log.Debug("RECV(", seq, ") ", string(payld))
payld, seq = handler(payld, seq)
req := newRequest(payld, seq)
reqs = append(reqs, req)
}
if err := conn.sendBatch(reqs); err != nil {
log.Debug(err)
}
}
}()
}
}()
return nil
}