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server.go
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server.go
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package topidchart
import (
"fmt"
"math/rand"
"time"
as "github.com/godevsig/adaptiveservice"
"github.com/godevsig/glib/sys/log"
"github.com/godevsig/grepo/fileserver"
)
// Server represents data server
type Server struct {
lg *log.Logger
ds *as.Server // data server
fs *fileserver.FileServer // file server
cs *chartServer // chart server
}
var (
hostAddr string
dataDir string
)
// NewServer creates a new server instance.
func NewServer(lg *log.Logger, port, dir string) *Server {
ip := "0.0.0.0"
c := as.NewClient(as.WithScope(as.ScopeWAN)).SetDiscoverTimeout(0)
conn := <-c.Discover("builtin", "IPObserver")
if conn != nil {
var observedIP string
err := conn.SendRecv(as.GetObservedIP{}, &observedIP)
if err == nil {
ip = observedIP
}
conn.Close()
}
fs := fileserver.NewFileServer(lg, "0", dir, "TOPID DATA")
if fs == nil {
lg.Errorln("create file server failed")
return nil
}
cs := newChartServer(lg, ip, port, fs.Port, dir)
if cs == nil {
lg.Errorln("create chart server failed")
return nil
}
var opts = []as.Option{as.WithLogger(lg)}
ds := as.NewServer(opts...).SetPublisher("platform")
hostAddr = fmt.Sprintf("%s:%s", ip, port)
dataDir = dir
server := &Server{
lg: lg,
ds: ds,
fs: fs,
cs: cs,
}
return server
}
// Run runs the server.
func (server *Server) Run() error {
defer func() { server.cs.stop(); server.fs.Stop() }()
go server.fs.Start()
go server.cs.start()
if err := server.ds.Publish("topidchart",
knownMsgs,
as.OnNewStreamFunc(func(ctx as.Context) { ctx.SetContext(server.lg) }),
); err != nil {
server.lg.Errorf("create data server failed: %v", err)
return err
}
err := server.ds.Serve()
if err != nil {
server.lg.Errorln(err)
}
return err
}
// Close shutdown the server.
func (server *Server) Close() {
server.ds.Close()
}
func randStringRunes(n int) string {
var letterRunes = []rune("abcdefghijklmnopqrstuvwxyz")
b := make([]rune, n)
for i := range b {
b[i] = letterRunes[rand.Intn(len(letterRunes))]
}
return string(b)
}
func init() {
rand.Seed(time.Now().UnixNano())
}