/
state.go
127 lines (114 loc) · 2.7 KB
/
state.go
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package riff
import (
"fmt"
"strings"
"time"
"github.com/teatak/riff/api"
)
func (s *Server) fanoutNodes() {
for {
select {
case <-s.ShutdownCh:
return
default:
}
nodes := s.randomNodes(s.config.Fanout, func(node *Node) bool {
return node.Name == s.Self.Name ||
node.State != api.StateAlive
})
if len(nodes) == 0 {
addrs := strings.Split(s.config.Join, ",")
for _, addr := range addrs {
if addr != "" && addr != s.Self.Address() {
if err := s.requestPeer(addr); err != nil {
s.Logger.Printf(errorServerPrefix+"%v\n", err)
} else {
break
}
}
}
} else {
for _, n := range nodes {
if err := s.requestPeer(n.Address()); err != nil {
s.SetStateWithShutter(n, api.StateSuspect)
s.Logger.Printf(errorServerPrefix+"%v\n", err)
}
}
}
time.Sleep(500 * time.Millisecond)
}
}
func (s *Server) fanoutDeadNodes() {
for {
select {
case <-s.ShutdownCh:
return
default:
}
nodes := s.randomNodes(1, func(node *Node) bool {
return node.Name == s.Self.Name ||
node.State == api.StateAlive
})
for _, n := range nodes {
if err := s.requestPeer(n.Address()); err != nil {
if n.State == api.StateSuspect {
s.SetStateWithShutter(n, api.StateDead)
s.RemoveNodeDelay(n)
}
//s.logger.Printf(errorRpcPrefix+"%v\n", err)
} else {
s.SetStateWithShutter(n, api.StateAlive)
}
}
time.Sleep(10 * time.Second)
}
}
func (s *Server) fanoutLeave() {
nodes := s.randomNodes(s.config.Fanout, func(node *Node) bool {
return node.Name == s.Self.Name ||
node.State != api.StateAlive
})
s.SetState(s.Self, api.StateSuspect)
s.SetState(s.Self, api.StateDead)
for _, n := range nodes {
s.Logger.Printf(infoServerPrefix+"server %s send leave event to %s", s.Self.Name, n.Address())
if err := s.requestLeave(n.Address()); err != nil {
s.Logger.Printf(errorServerPrefix+"%v\n", err)
}
}
}
func (s *Server) requestLeave(peer string) error {
client, err := api.NewClient(peer)
if err != nil {
return fmt.Errorf("%v", err)
}
defer client.Close()
diff := []*Node{s.Self}
var reDiff []*Node
err = client.Call("Riff.PushDiff", diff, &reDiff)
return err
}
func (s *Server) requestPeer(peer string) error {
client, err := api.NewClient(peer)
if err != nil {
return fmt.Errorf("%v", err)
}
defer client.Close()
var digests []*Digest
err = client.Call("Riff.Request", s.SnapShot, &digests)
if err != nil {
return fmt.Errorf("peer: %s error: %v", peer, err)
}
//push diff
if len(digests) != 0 {
diff := s.MakeDiffNodes(digests)
if len(diff) != 0 {
var reDiff []*Node
_ = client.Call("Riff.PushDiff", diff, &reDiff)
if len(reDiff) != 0 {
s.MergeDiff(reDiff)
}
}
}
return nil
}