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main.go
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main.go
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package main
import (
"context"
"flag"
"log"
"os"
"os/signal"
"syscall"
"github.com/gin-gonic/gin"
"github.com/luraproject/lura/v2/config"
"github.com/luraproject/lura/v2/logging"
"github.com/luraproject/lura/v2/proxy"
krakendgin "github.com/luraproject/lura/v2/router/gin"
"github.com/luraproject/lura/v2/transport/http/client"
opencensus "github.com/Dorkside/opencensus"
"github.com/Dorkside/opencensus/exporter"
_ "github.com/Dorkside/opencensus/exporter/influxdb"
_ "github.com/Dorkside/opencensus/exporter/jaeger"
_ "github.com/Dorkside/opencensus/exporter/prometheus"
_ "github.com/Dorkside/opencensus/exporter/zipkin"
opencensusgin "github.com/Dorkside/opencensus/router/gin"
"github.com/luraproject/lura/v2/transport/http/server"
)
func main() {
port := flag.Int("p", 0, "Port of the service")
logLevel := flag.String("l", "ERROR", "Logging level")
debug := flag.Bool("d", false, "Enable the debug")
configFile := flag.String("c", "/etc/krakend/configuration.json", "Path to the configuration filename")
flag.Parse()
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
go func() {
select {
case sig := <-sigs:
log.Println("Signal intercepted:", sig)
cancel()
case <-ctx.Done():
}
}()
parser := config.NewParser()
serviceConfig, err := parser.Parse(*configFile)
if err != nil {
log.Fatal("ERROR:", err.Error())
}
serviceConfig.Debug = serviceConfig.Debug || *debug
if *port != 0 {
serviceConfig.Port = *port
}
logger, _ := logging.NewLogger(*logLevel, os.Stdout, "[KRAKEND]")
// Register stats and trace exporters to export the collected data.
exporter.Register(logger)
if err := opencensus.Register(ctx, serviceConfig); err != nil {
log.Fatal(err)
}
bf := func(cfg *config.Backend) proxy.Proxy {
return proxy.NewHTTPProxyWithHTTPExecutor(cfg, opencensus.HTTPRequestExecutorFromConfig(client.NewHTTPClient, cfg), cfg.Decoder)
}
// setup the krakend router
routerFactory := krakendgin.NewFactory(krakendgin.Config{
Engine: gin.Default(),
ProxyFactory: opencensus.ProxyFactory(proxy.NewDefaultFactory(opencensus.BackendFactory(bf), logger)),
Middlewares: []gin.HandlerFunc{},
Logger: logger,
HandlerFactory: opencensusgin.New(krakendgin.EndpointHandler),
RunServer: server.RunServer,
})
// start the engine
routerFactory.NewWithContext(ctx).Run(serviceConfig)
}