// Next retrieves the next object name in the pool/namespace iterator.
// Upon a successful invocation (return value of true), the Value method should
// be used to obtain the name of the retrieved object name. When the iterator is
// exhausted, Next returns false. The Err method should used to verify whether the
// end of the iterator was reached, or the iterator received an error.
//
// Example:
// iter := pool.Iter()
// defer iter.Close()
// for iter.Next() {
// fmt.Printf("%v\n", iter.Value())
// }
// return iter.Err()
//
func (iter *Iter) Next() bool {
var c_entry *C.char
if cerr := C.rados_objects_list_next(iter.ctx, &c_entry, nil); cerr < 0 {
iter.err = GetRadosError(int(cerr))
return false
}
iter.entry = C.GoString(c_entry)
return true
}
func (ctx *RadosListCtx) Next() (string, error) {
var buf *C.char
cerr := C.rados_objects_list_next(*ctx.list_ctx, &buf, nil)
if cerr == -C.ENOENT {
log.Println("Next failed")
return "", io.EOF
}
if cerr < 0 {
log.Println("Next failed")
return "", errors.New("next failed")
}
//log.Println(C.GoString(buf))
return C.GoString(buf), nil
}
// Next returns the objectId and locationKey (if any) of the next object.
func (ol *ObjectList) Next() (object *Object, locationKey string, err error) {
var e *C.char
var k *C.char
ret := C.rados_objects_list_next(ol.listContext, &e, &k)
if errs := toRadosError(ret); errs != nil {
errs.Message = "Unable to get next object from list."
err = errs
} else {
object = &Object{
ioContext: ol.ioContext,
name: C.GoString(e),
}
locationKey = C.GoString(k)
}
return
}
// ListObjects lists all of the objects in the pool associated with the I/O
// context, and called the provided listFn function for each object, passing
// to the function the name of the object.
func (ioctx *IOContext) ListObjects(listFn ObjectListFunc) error {
var ctx C.rados_list_ctx_t
ret := C.rados_objects_list_open(ioctx.ioctx, &ctx)
if ret < 0 {
return RadosError(ret)
}
defer func() { C.rados_objects_list_close(ctx) }()
for {
var c_entry *C.char
ret := C.rados_objects_list_next(ctx, &c_entry, nil)
if ret == -2 { // FIXME
return nil
} else if ret < 0 {
return RadosError(ret)
}
listFn(C.GoString(c_entry))
}
panic("invalid state")
}
