124 lines
2.2 KiB
Go
124 lines
2.2 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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"loafle.com/overflow/cron_go"
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"log"
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"sync"
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cm "loafle.com/overflow/agent_api/config_manager"
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"loafle.com/overflow/agent_api/observer"
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"loafle.com/overflow/agent_api/observer/messages"
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pb "loafle.com/overflow/crawler_go/grpc" //temp
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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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}
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func init() {
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addObservers()
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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 addObservers() {
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ch := make(chan interface{}, 0)
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observer.Add(messages.CONFIGMANAGER_LOADED, ch)
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handleInit(ch)
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}
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func handleInit(ch chan interface{}) {
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ds := GetInstance()
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go func() {
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data := <-ch
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log.Println(data)
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ds.gconf = data.(cm.ConfigManager).GetGlobalConfig()
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ds.start()
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close(ch)
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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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cr := &cron.Cron{}
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p.runStat = cr.Start()
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cr.AddTask(POLLING_ID, DEFAULT_INTERVAL).Invoke(p.polling, agentIdentifier())
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})
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}
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func (p *Poller) Stop() {
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p.runStat <- false
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observer.Notify(messages.POLLER_STOPPED, true)
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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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//printStatus(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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func agentIdentifier() string {
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//todo
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return "agent000001"
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}
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/*
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func printStassssssssstus(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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