// cleanupAllProps cleans all props.
func (s *scene) cleanupAllProps() error {
for _, box := range s.props {
if box.cleanup != nil {
err := box.cleanup(box.key, box.prop)
if err != nil {
return errors.Annotate(err, ErrCleanupFailed, errorMessages, box.key)
}
}
}
return nil
}
// NewUUIDByHex creates a UUID based on the passed hex string which has to
// have the length of 32 bytes.
func NewUUIDByHex(source string) (UUID, error) {
uuid := UUID{}
if len([]byte(source)) != 32 {
return uuid, errors.New(ErrInvalidHexLength, errorMessages)
}
raw, err := hex.DecodeString(source)
if err != nil {
return uuid, errors.Annotate(err, ErrInvalidHexValue, errorMessages)
}
copy(uuid[:], raw)
return uuid, nil
}
// Test the annotation of errors.
func TestAnnotation(t *testing.T) {
assert := asserts.NewTestingAssertion(t, true)
ec := 123
messages := errors.Messages{ec: "annotated"}
aerr := testError("wrapped")
err := errors.Annotate(aerr, ec, messages)
assert.ErrorMatch(err, `\[ERRORS_TEST:123\] annotated: wrapped`)
assert.Equal(errors.Annotated(err), aerr)
assert.True(errors.IsInvalidTypeError(errors.Annotated(aerr)))
assert.Length(errors.Stack(err), 2)
}
// processCommand processes the sent commands.
func (s *scene) processCommand(command *envelope) {
switch command.kind {
case storeProp:
// Add a new prop.
_, ok := s.props[command.box.key]
if ok {
command.err = errors.New(ErrPropAlreadyExist, errorMessages, command.box.key)
} else {
s.props[command.box.key] = command.box
}
case fetchProp:
// Retrieve a prop.
box, ok := s.props[command.box.key]
if !ok {
command.err = errors.New(ErrPropNotFound, errorMessages, command.box.key)
} else {
command.box = box
}
case disposeProp:
// Remove a prop.
box, ok := s.props[command.box.key]
if !ok {
command.err = errors.New(ErrPropNotFound, errorMessages, command.box.key)
} else {
delete(s.props, command.box.key)
command.box = box
if box.cleanup != nil {
cerr := box.cleanup(box.key, box.prop)
if cerr != nil {
command.err = errors.Annotate(cerr, ErrCleanupFailed, errorMessages, box.key)
}
}
}
case flag:
// Signal a topic.
s.flags[command.signaling.topic] = true
// Notify subscribers.
subscribers, ok := s.signalings[command.signaling.topic]
if ok {
delete(s.signalings, command.signaling.topic)
for _, subscriber := range subscribers {
subscriber <- struct{}{}
}
}
case unflag:
// Drop a topic.
delete(s.flags, command.signaling.topic)
case wait:
// Add a waiter for a topic.
active := s.flags[command.signaling.topic]
if active {
command.signaling.signalChan <- struct{}{}
} else {
waiters := s.signalings[command.signaling.topic]
s.signalings[command.signaling.topic] = append(waiters, command.signaling.signalChan)
}
default:
panic("illegal command")
}
// Return the changed command as response.
command.respChan <- command
}