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srv.go
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srv.go
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// Copyright 2013 The Go Circuit Project
// Use of this source code is governed by the license for
// The Go Circuit Project, found in the LICENSE file.
//
// Authors:
// 2014 Petar Maymounkov <p@gocircuit.org>
package server
import (
"errors"
"io"
"os"
"runtime/pprof"
"time"
"github.com/gocircuit/circuit/kit/interruptible"
"github.com/gocircuit/circuit/tissue"
"github.com/gocircuit/circuit/use/circuit"
"github.com/gocircuit/circuit/use/n"
)
type Server interface {
Profile(string) (io.ReadCloser, error)
Peek() Stat
Rejoin(string) error // circuit address to join to
Suicide()
IsDone() bool
Scrub()
X() circuit.X
}
// server
type server struct {
addr string
kin *tissue.Kin
joined time.Time
}
func New(kin *tissue.Kin) Server {
return &server{
addr: kin.Avatar().X.Addr().String(),
kin: kin,
joined: time.Now(),
}
}
type Stat struct {
Addr string
Joined time.Time
}
func (s *server) Rejoin(addr string) error {
a, err := n.ParseAddr(addr)
if err != nil {
return err
}
return s.kin.ReJoin(a)
}
func (s *server) Suicide() {
os.Exit(0)
}
func (s *server) Profile(name string) (io.ReadCloser, error) {
p := pprof.Lookup(name)
if p == nil {
return nil, errors.New("no profile")
}
r, w := interruptible.Pipe()
go func() {
p.WriteTo(w, 1)
w.Write([]byte("•••\n"))
w.Close()
}()
return r, nil
}
type nopCloser struct {
io.Reader
}
func (nopCloser) Close() error {
return nil
}
func (s *server) Peek() Stat {
return Stat{
Addr: s.addr,
Joined: s.joined,
}
}
func (s *server) IsDone() bool {
return false
}
func (s *server) Scrub() {}
func (s *server) X() circuit.X {
return circuit.Ref(XServer{s})
}