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nsq_tail: safety #190

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May 21, 2013
Merged

nsq_tail: safety #190

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14 changes: 11 additions & 3 deletions examples/nsq_tail/nsq_tail.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,15 +6,18 @@ import (
"github.com/bitly/nsq/nsq"
"github.com/bitly/nsq/util"
"log"
"math/rand"
"os"
"os/signal"
"strings"
"syscall"
"time"
)

var (
showVersion = flag.Bool("version", false, "print version string")
topic = flag.String("topic", "", "nsq topic")
channel = flag.String("channel", "nsq_tail#ephemeral", "nsq channel")
channel = flag.String("channel", "", "nsq channel")
maxInFlight = flag.Int("max-in-flight", 200, "max number of messages to allow in flight")
nsqdTCPAddrs = util.StringArray{}
lookupdHTTPAddrs = util.StringArray{}
Expand Down Expand Up @@ -47,8 +50,13 @@ func main() {
return
}

if *topic == "" || *channel == "" {
log.Fatalf("--topic and --channel are required")
if *channel == "" {
rand.Seed(time.Now().UnixNano())
*channel = fmt.Sprintf("tail%06d#ephemeral", rand.Int()%999999)
}

if *topic == "" {
log.Fatalf("--topic is required")
}

if *maxInFlight < 0 {
Expand Down