// ChildrenW works like Children but also returns a channel that will
// receive a single Event value when a node is added or removed under the
// provided path or when critical session events happen. See the documentation
// of the Event type for more details.
func (conn *Conn) ChildrenW(path string) (children []string, stat *Stat, watch <-chan Event, err error) {
conn.mutex.RLock()
defer conn.mutex.RUnlock()
if conn.handle == nil {
return nil, nil, nil, closingError("childrenw", path)
}
cpath := C.CString(path)
defer C.free(unsafe.Pointer(cpath))
watchId, watchChannel := conn.createWatch(true)
cvector := C.struct_String_vector{}
var cstat Stat
rc, cerr := C.zoo_wget_children2(conn.handle, cpath, C.watch_handler, unsafe.Pointer(watchId), &cvector, &cstat.c)
// Can't happen if rc != 0, but avoid potential memory leaks in the future.
if cvector.count != 0 {
children = parseStringVector(&cvector)
}
if rc == C.ZOK {
stat = &cstat
watch = watchChannel
} else {
conn.forgetWatch(watchId)
err = zkError(rc, cerr, "childrenw", path)
}
return
}
// Children returns the children list and status from an existing node.
// Attempting to retrieve the children list from a non-existent node is an error.
func (conn *Conn) Children(path string) (children []string, stat *Stat, err error) {
conn.mutex.RLock()
defer conn.mutex.RUnlock()
if conn.handle == nil {
return nil, nil, closingError("children", path)
}
cpath := C.CString(path)
defer C.free(unsafe.Pointer(cpath))
cvector := C.struct_String_vector{}
var cstat Stat
rc, cerr := C.zoo_wget_children2(conn.handle, cpath, nil, nil, &cvector, &cstat.c)
// Can't happen if rc != 0, but avoid potential memory leaks in the future.
if cvector.count != 0 {
children = parseStringVector(&cvector)
}
if rc == C.ZOK {
stat = &cstat
} else {
err = zkError(rc, cerr, "children", path)
}
return
}