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#6: Add support of append method #7

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#6: Add support of append method #7

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15 changes: 12 additions & 3 deletions memcache.go
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Original file line number Diff line number Diff line change
Expand Up @@ -656,6 +656,12 @@ func (c *Client) GetMulti(keys []string) (map[string]*Item, error) {
return m, nil
}

// Append writes the given item value to existing one
// ErrNotStored is returned if no item with that key exists
func (c *Client) Append(item *Item) error {
return c.populateOne(cmdAppend, item, 0)
}

// Set writes the given item, unconditionally.
func (c *Client) Set(item *Item) error {
return c.populateOne(cmdSet, item, 0)
Expand All @@ -679,9 +685,12 @@ func (c *Client) CompareAndSwap(item *Item) error {
}

func (c *Client) populateOne(cmd command, item *Item, casid uint64) error {
extras := make([]byte, 8)
putUint32(extras, item.Flags)
putUint32(extras[4:8], uint32(item.Expiration))
var extras []byte
if cmd != cmdAppend {
extras = make([]byte, 8)
putUint32(extras, item.Flags)
putUint32(extras[4:8], uint32(item.Expiration))
}
cn, err := c.sendCommand(item.Key, cmd, item.Value, casid, extras)
if err != nil {
return err
Expand Down