/
server.go
108 lines (90 loc) · 3.06 KB
/
server.go
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package main
import (
"database/sql"
"flag"
"log"
"net/http"
"strings"
"github.com/gocql/gocql"
"github.com/streadway/amqp"
"github.com/OlivierBoucher/go-tracking-server/ctx"
"github.com/OlivierBoucher/go-tracking-server/datastores"
"github.com/OlivierBoucher/go-tracking-server/processor"
"github.com/OlivierBoucher/go-tracking-server/queues"
"github.com/OlivierBoucher/go-tracking-server/routes"
"github.com/OlivierBoucher/go-tracking-server/utilities"
"github.com/OlivierBoucher/go-tracking-server/validators"
)
func main() {
processorFlagPtr := flag.Bool("processor", false, "by default it starts an http server instance, use this flag to start a processor instead")
envFlagPtr := flag.String("env", "DEV", "by default the environnement is set to DEV, use PROD for production")
flag.Parse()
config, err := utilities.LoadJSONConfig()
if err != nil {
log.Fatalf("FATAL ERROR: reading json config: %s", err.Error())
}
queueConn, err := amqp.Dial(config.QueueConnectionUrl)
if err != nil {
log.Fatalf("FATAL ERROR: initializing persistent queue connection: %s", err.Error())
}
defer queueConn.Close()
trackingValidator, err := validators.NewJSONEventTrackingValidator()
if err != nil {
log.Fatalf("FATAL ERROR: initializing tracking validator: %s", err.Error())
}
if *processorFlagPtr {
cluster := gocql.NewCluster(strings.Split(config.StorageDbParams.ClusterUrls, "|")...)
cluster.Keyspace = config.StorageDbParams.Keyspace
cluster.Authenticator = gocql.PasswordAuthenticator{
Username: config.StorageDbParams.Username,
Password: config.StorageDbParams.Password,
}
storageConn, err := datastores.NewStorageInstance(cluster)
if err != nil {
log.Fatalf("FATAL ERROR: initializing storage db connection: %s", err.Error())
}
context := ctx.NewContext(
nil,
storageConn,
queues.NewRabbitMQConnection(queueConn),
trackingValidator,
*envFlagPtr)
startProcessingServer(context)
} else {
authDb, err := sql.Open("mysql", config.AuthDbConnectionString)
if err != nil {
log.Fatalf("FATAL ERROR: initializing database connection: %s", err.Error())
}
defer authDb.Close()
context := ctx.NewContext(
datastores.NewAuthInstance(authDb),
nil,
queues.NewRabbitMQConnection(queueConn),
trackingValidator,
*envFlagPtr)
startTrackingServer(context)
}
}
func startTrackingServer(context *ctx.Context) {
context.Logger.Fatalf("FATAL ERROR: from server: %+v", http.ListenAndServe(":1337", routes.Handlers(context)))
}
func startProcessingServer(context *ctx.Context) {
ch, err := context.Queue.Channel()
if err != nil {
context.Logger.Fatalf("FATAL ERROR: from openning channel: %s", err.Error())
}
defer ch.Close()
msgs, err := context.Queue.ConsumeQueueWithChannel("tracking-queue", ch)
if err != nil {
context.Logger.Fatalf("FATAL ERROR: from queue consuming: %s", err.Error())
}
forever := make(chan bool)
go func() {
for m := range msgs {
context.Logger.Infof("Recieved a message: %s", m.MessageId)
processor.ProcessMessage(context, &m)
}
}()
context.Logger.Info("Waiting for messages...")
<-forever
}