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main.go
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main.go
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package main
import (
"context"
"fmt"
"log"
"os"
"os/signal"
"time"
"github.com/go-gulfstream/gulfstream/examples/commandbus-nats/types"
"github.com/google/uuid"
"github.com/go-gulfstream/gulfstream/pkg/command"
commandbusnats "github.com/go-gulfstream/gulfstream/pkg/commandbus/nats"
"github.com/nats-io/nats.go"
)
func main() {
opts := []nats.Option{nats.Name("name")}
conn, err := nats.Connect("nats:4222", opts...)
checkError(err)
defer conn.Close()
ctx := context.Background()
commandbus := commandbusnats.NewClient(types.PartyStreamName, conn)
go func() {
for {
// create new party-event
createPartyCmd := createParty(types.CreateNewParty{
EventName: "golang fest",
DateTime: time.Now().Add(time.Hour),
Lat: 1,
Lon: 1,
Radius: 3000,
Address: "google",
})
log.Printf("[CLIENT:COMMANDSINK] id=%s, name=%s",
createPartyCmd.ID(),
createPartyCmd.Name(),
)
reply, err := commandbus.CommandSink(ctx, createPartyCmd)
checkError(err)
if reply == nil {
os.Exit(1)
}
log.Printf("[CLIENT:REPLY]=> %s stream=%s, sid=%s, commandName=%s, v=%d\n",
status(reply.Command() == createPartyCmd.ID()),
createPartyCmd.StreamName(),
createPartyCmd.StreamID(),
createPartyCmd.Name(),
reply.StreamVersion())
// add participant
addParticipantCommand := addParticipant(
createPartyCmd.StreamID(),
types.AddParticipant{
Name: "user",
Age: 16,
Sex: -1,
})
reply, err = commandbus.CommandSink(ctx, addParticipantCommand)
checkError(err)
if reply == nil {
os.Exit(1)
}
log.Printf("[CLIENT:REPLY]=> %s stream=%s, sid=%s, commandName=%s, v=%d\n",
status(reply.Command() == addParticipantCommand.ID()),
addParticipantCommand.StreamName(),
addParticipantCommand.StreamID(),
addParticipantCommand.Name(),
reply.StreamVersion())
time.Sleep(2 * time.Second)
}
}()
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
<-c
}
func status(f bool) string {
if f {
return "OK"
}
return "FAIL"
}
func checkError(err error) {
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
func createParty(p types.CreateNewParty) *command.Command {
return command.New(types.CreateNewPartyCommand, types.PartyStreamName, uuid.New(), &p)
}
func addParticipant(streamID uuid.UUID, p types.AddParticipant) *command.Command {
return command.New(types.AddParticipantCommand, types.PartyStreamName, streamID, &p)
}