148 lines
2.7 KiB
Go
148 lines
2.7 KiB
Go
package long_poller_go
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import (
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"context"
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"google.golang.org/grpc"
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cm "loafle.com/overflow/agent_api/config_manager"
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pb "loafle.com/overflow/crawler_go/grpc" //temp
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s "loafle.com/overflow/scheduler_go"
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"log"
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"strconv"
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"sync"
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)
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const (
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POLLING_ID = "OVERFLOW_LONG_POLLING"
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DEFAULT_INTERVAL = uint64(3)
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)
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var (
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instance *Poller
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once sync.Once
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)
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type Poller struct {
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once sync.Once
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runStat chan bool
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gconf *cm.GlobalConfig
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intervalCh chan interface{}
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scheduler *s.Scheduler
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}
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func init() {
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go handleConfigLoaded()
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}
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func GetInstance() *Poller {
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once.Do(func() {
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instance = &Poller{}
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})
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return instance
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}
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func startPoller(ch chan interface{}) {
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p := GetInstance()
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go func() {
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data := <-ch
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p.gconf = data.(cm.ConfigManager).GetGlobalConfig()
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p.start()
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p.addObservers()
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}()
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}
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func (p *Poller) addObservers() {
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go p.handleAgentStop()
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}
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func (p *Poller) handleInterval(ch chan interface{}) {
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go func() {
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data := <-ch
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interval := data.(string)
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i, err := strconv.Atoi(interval)
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if err != nil {
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log.Println(err)
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return
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}
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p.scheduler.UpdateInterval(POLLING_ID, uint64(i))
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}()
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}
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func (p *Poller) start() {
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p.once.Do(func() {
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p.scheduler = &s.Scheduler{}
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p.scheduler.Start()
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p.scheduler.NewSchedule(POLLING_ID, DEFAULT_INTERVAL, p.polling)
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})
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}
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func (p *Poller) Stop() {
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p.scheduler.Stop()
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p.runStat <- false
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}
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func (p *Poller) polling(agentId string) {
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addr := p.gconf.Central.Address + ":" + string(p.gconf.Central.Port)
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conn, err := grpc.Dial(addr, grpc.WithInsecure())
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if err != nil {
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log.Println(err)
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return
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}
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defer conn.Close()
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//todo temporary
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client := pb.NewStatusClient(conn)
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//printStatusStream(client) //stream
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out, err := client.Status(context.Background(), &pb.Empty{})
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if err != nil {
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log.Println(err)
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}
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p.dispatchNotify(out)
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}
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func (p *Poller) dispatchNotify(result interface{}) {
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log.Printf("Polling result - %s ", result)
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/*
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TASK_SENSOR_START
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TASK_SENSOR_STOP
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TASK_SENSOR_ADD
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TASK_SENSOR_REMOVE
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TASK_SENSOR_UPDATE
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TASK_CRAWLER_UPDATE
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TASK_AGENT_UPDATE
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TASK_LOG_SEND
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*/
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}
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func (p *Poller) updateInterval(interval string) {
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i, err := strconv.Atoi(interval)
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if err != nil {
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log.Println(err)
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return
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}
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p.scheduler.UpdateInterval(POLLING_ID, uint64(i))
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}
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/*
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func printStatusStream(client pb.StatusClient) {
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stream, err := client.Status(context.Background(), &pb.Empty{})
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if err != nil {
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grpclog.Fatalf("%v.List(_) = _, %v", client, err)
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}
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for {
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feature, err := stream.Recv()
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if err == io.EOF {
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break
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}
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if err != nil {
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grpclog.Fatalf("%v.List(_) = _, %v", client, err)
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}
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grpclog.Println(feature)
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}
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grpclog.Println("--------------------------")
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}
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*/
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