func Example() {
myOplogURL := "http://oplog.mydomain.com"
c := oplogc.Subscribe(myOplogURL, oplogc.Options{})
ops, errs, done := c.Start()
for {
select {
case op := <-ops:
// Got the next operation
switch op.Event {
case "reset":
// reset the data store
case "live":
// put the service back in production
default:
// Do something with the operation
//url := fmt.Sprintf("http://api.domain.com/%s/%s", op.Data.Type, op.Data.ID)
//data := MyAPIGetter(url)
//MyDataSyncer(data)
}
// Ack the fact you handled the operation
op.Done()
case err := <-errs:
switch err {
case oplogc.ErrAccessDenied, oplogc.ErrWritingState:
c.Stop()
log.Fatal(err)
case oplogc.ErrResumeFailed:
log.Print("Resume failed, forcing full replication")
c.SetLastID("0")
default:
log.Print(err)
}
case <-done:
return
}
}
}
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
flag.PrintDefaults()
fmt.Print(" <oplog url>\n")
}
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
os.Exit(2)
}
url := flag.Arg(0)
f := oplogc.Filter{
Types: strings.Split(*types, ","),
Parents: strings.Split(*parents, ","),
}
c := oplogc.Subscribe(url, oplogc.Options{
StateFile: *stateFile,
Password: *password,
AllowReplication: *allowReplication,
Filter: f,
})
ops, errs, done := c.Start()
for {
select {
case op := <-ops:
switch op.Event {
case "reset":
fmt.Print("** reset\n")
case "live":
fmt.Print("** live\n")
default:
if op.Data.Ref == "" {
fmt.Printf("%s: %s #%s %s/%s (%s)\n",
op.Data.Timestamp, op.Event, op.ID, op.Data.Type, op.Data.ID, strings.Join(op.Data.Parents, ", "))
} else {
fmt.Printf("%s: %s #%s %s (%s)\n",
op.Data.Timestamp, op.Event, op.ID, op.Data.Ref, strings.Join(op.Data.Parents, ", "))
}
}
op.Done()
case err := <-errs:
switch err {
case oplogc.ErrAccessDenied, oplogc.ErrWritingState:
c.Stop()
log.Fatal(err)
case oplogc.ErrResumeFailed:
if *stateFile != "" {
log.Print("Resume failed, forcing full replication")
c.SetLastID("0")
} else {
log.Print(err)
}
default:
log.Print(err)
}
case <-done:
return
}
}
}
