forked from mesosphere-backup/tweeter-go
/
main.go
87 lines (73 loc) · 2.19 KB
/
main.go
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package main
import (
"github.com/karlkfi/oinker-go/controller"
"github.com/facebookgo/grace/gracehttp"
"github.com/karlkfi/inject"
"net/http"
"log"
"flag"
"net"
"fmt"
"strings"
"github.com/karlkfi/oinker-go/model"
"strconv"
)
func main() {
flagSet := flag.CommandLine
flags := parseFlags(flagSet)
log.Printf("Flags: %+v", flags)
oinker := &Oinker{}
if *flags.cassandraAddr != "" {
oinker.CQLHosts = []string{*flags.cassandraAddr}
} else if *flags.cassandraSRV != "" && *flags.cassandraDNS == "" || *flags.cassandraSRV == "" && *flags.cassandraDNS != "" {
log.Fatalf("Invalid input: cassandra-srv and cassandra-dns must both be specified to enable cassandra usage")
} else if *flags.cassandraSRV != "" && *flags.cassandraDNS != "" {
hosts, err := lookupCassandraHosts(*flags.cassandraSRV, *flags.cassandraDNS)
if err != nil {
log.Fatalf("Error looking up Cassandra SRV records: %s", err)
}
oinker.CQLHosts = hosts
}
graph := oinker.NewGraph()
var oinkRepo model.OinkRepo
inject.ExtractAssignable(graph, &oinkRepo)
err := oinkRepo.Init()
if err != nil {
log.Fatalf("Error Initializing Repo: %s", err)
}
var mux controller.MuxServer
inject.ExtractAssignable(graph, &mux)
var controllers []controller.Controller
inject.FindAssignable(graph, &controllers)
for _, c := range controllers {
log.Println("Registering controller:", c.Name())
c.RegisterHandlers(mux)
}
// serve and listen for shutdown signals
gracehttp.Serve(
&http.Server{Addr: *flags.address, Handler: mux},
)
}
func lookupCassandraHosts(service, dns string) ([]string, error) {
cname, srvs, err := net.LookupSRV(service, "tcp", dns)
if err != nil {
return nil, fmt.Errorf("Looking up SRV record (srv: %s, dns: %s): %s", service, dns, err)
}
log.Printf("CNAME: %s", cname)
log.Printf("SRVs: %+v", srvs)
if len(srvs) == 0 {
return nil, fmt.Errorf("No SRV records found (srv: %s, dns: %s)", service, dns)
}
addrs := make([]string, len(srvs), len(srvs))
for i, srv := range srvs {
addr := srv.Target
if strings.HasSuffix(srv.Target, ".") {
addr = addr[:len(addr)-1]
}
if srv.Port > 0 {
addr = addr+":"+strconv.FormatUint(uint64(srv.Port), 10)
}
addrs[i] = addr
}
return addrs, nil
}