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registry.go
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registry.go
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package server
import (
"net"
"time"
"github.com/unistack-org/micro/v3/metadata"
"github.com/unistack-org/micro/v3/register"
"github.com/unistack-org/micro/v3/util/addr"
"github.com/unistack-org/micro/v3/util/backoff"
)
var (
// DefaultRegisterFunc uses backoff to register service
DefaultRegisterFunc = func(svc *register.Service, config Options) error {
var err error
opts := []register.RegisterOption{
register.RegisterTTL(config.RegisterTTL),
register.RegisterDomain(config.Namespace),
}
for i := 0; i <= config.RegisterAttempts; i++ {
err = config.Register.Register(config.Context, svc, opts...)
if err == nil {
break
}
// backoff then retry
time.Sleep(backoff.Do(i + 1))
continue
}
return err
}
// DefaultDeregisterFunc uses backoff to deregister service
DefaultDeregisterFunc = func(svc *register.Service, config Options) error {
var err error
opts := []register.DeregisterOption{
register.DeregisterDomain(config.Namespace),
}
for i := 0; i <= config.DeregisterAttempts; i++ {
err = config.Register.Deregister(config.Context, svc, opts...)
if err == nil {
break
}
// backoff then retry
time.Sleep(backoff.Do(i + 1))
continue
}
return err
}
)
// NewRegisterService returns *register.Service from Server
func NewRegisterService(s Server) (*register.Service, error) {
opts := s.Options()
advt := opts.Address
if len(opts.Advertise) > 0 {
advt = opts.Advertise
}
host, port, err := net.SplitHostPort(advt)
if err != nil {
return nil, err
}
addr, err := addr.Extract(host)
if err != nil {
addr = host
}
node := ®ister.Node{
ID: opts.Name + "-" + opts.ID,
Address: net.JoinHostPort(addr, port),
}
node.Metadata = metadata.Copy(opts.Metadata)
node.Metadata["server"] = s.String()
node.Metadata["broker"] = opts.Broker.String()
node.Metadata["register"] = opts.Register.String()
return ®ister.Service{
Name: opts.Name,
Version: opts.Version,
Nodes: []*register.Node{node},
Metadata: metadata.New(0),
}, nil
}