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bus.go
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/
bus.go
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package shared
import (
"context"
"os"
"github.com/dmibod/kanban/shared/message"
"github.com/dmibod/kanban/shared/tools/bus"
"github.com/dmibod/kanban/shared/tools/bus/nats"
"github.com/dmibod/kanban/shared/tools/logger"
)
const busUrlEnvVar = "BUS_URL"
const busClientEnvVar = "BUS_CLIENT"
// GetNameOrDefault gets name from environment variable or fallbacks to default one
func GetNameOrDefault(defName string) string {
name := os.Getenv(busClientEnvVar)
if name == "" {
return defName
}
return name
}
func getBusUrlOrDefault(defUrl string) string {
url := os.Getenv(busUrlEnvVar)
if url == "" {
return defUrl
}
return url
}
// StartBus starts bus
func StartBus(ctx context.Context, c string, l logger.Logger) {
conn := nats.CreateConnection(
nats.WithName(c),
nats.WithURL(getBusUrlOrDefault("")),
nats.WithLogger(l))
if err := bus.ConnectAndServe(ctx, conn, message.CreateTransport(conn, CreateLogger("[BRK.BUS]"))); err != nil {
l.Errorf("bus err: %s\n", err.Error()) // panic if there is an error
panic(err)
}
}
// StopBus stops bus
func StopBus() {
bus.Disconnect()
}