func (h Handler) Touch(cmd common.TouchRequest) error {
// read metadata
// for 0 to metadata.numChunks
// touch item
// touch metadata
// We get the metadata and not GAT it in case the key is *just* about to expire.
// In this case if a chunk expires during the operation, we fail the touch instead of
// leaving a key in an inconsistent state where the metadata lives on and the data is
// incomplete. The metadata is touched last to make sure the data exists first.
metaKey, metaData, err := getMetadata(h.rw, cmd.Key)
if err != nil {
if err == common.ErrKeyNotFound {
metrics.IncCounter(MetricCmdTouchMissesMeta)
}
return err
}
// First touch all the chunks as a batch
for i := 0; i < int(metaData.NumChunks); i++ {
chunkKey := chunkKey(cmd.Key, i)
if err := binprot.WriteTouchCmd(h.rw.Writer, chunkKey, cmd.Exptime); err != nil {
return err
}
}
if err := h.rw.Flush(); err != nil {
return err
}
miss := false
for i := 0; i < int(metaData.NumChunks); i++ {
if err := simpleCmdLocal(h.rw, false); err != nil {
if err == common.ErrKeyNotFound && !miss {
metrics.IncCounter(MetricCmdTouchMissesChunk)
miss = true
}
}
}
if miss {
return common.ErrKeyNotFound
}
// Then touch the metadata
if err := binprot.WriteTouchCmd(h.rw.Writer, metaKey, cmd.Exptime); err != nil {
return err
}
if err := simpleCmdLocal(h.rw, true); err != nil {
if err == common.ErrKeyNotFound {
metrics.IncCounter(MetricCmdTouchMissesMeta)
}
return err
}
return nil
}
func (h Handler) Touch(cmd common.TouchRequest) error {
// read metadata
// for 0 to metadata.numChunks
// touch item
// touch metadata
metaKey, metaData, err := getMetadata(h.rw, cmd.Key)
if err != nil {
if err == common.ErrKeyNotFound {
//fmt.Println("Touch miss because of missing metadata. Key:", cmd.Key)
return err
}
return err
}
// First touch all the chunks
for i := 0; i < int(metaData.NumChunks); i++ {
chunkKey := chunkKey(cmd.Key, i)
if err := binprot.WriteTouchCmd(h.rw.Writer, chunkKey, cmd.Exptime); err != nil {
return err
}
if err := simpleCmdLocal(h.rw); err != nil {
return err
}
}
// Then touch the metadata
if err := binprot.WriteTouchCmd(h.rw.Writer, metaKey, cmd.Exptime); err != nil {
return err
}
if err := simpleCmdLocal(h.rw); err != nil {
return err
}
return nil
}
func (h Handler) Touch(cmd common.TouchRequest) error {
if err := binprot.WriteTouchCmd(h.rw.Writer, cmd.Key, cmd.Exptime); err != nil {
return err
}
return simpleCmdLocal(h.rw)
}