getset #

Sets a new value for a key and returns its previous value.

getset(key, value, [options], [callback]) #

Arguments	Type	Description
`key`	string	Key identifier
`value`	string	Key's new value
`options`	JSON Object	Optional parameters
`callback`	function	Callback

Options #

Option	Type	Description	Default
`queuable`	boolean	Make this request queuable or not	`true`

Return Value #

Returns the MemoryStorage object to allow chaining.

Callback Response #

Returns the key's previous value.

Usage #

// Using callbacks (NodeJS or Web Browser)
kuzzle.memoryStorage.getset('key', 'new value', function (err, oldValue) {
  // callback called once the action has completed
});
// Using promises (NodeJS only)
kuzzle.memoryStorage.getsetPromise('key', 'new value')
  .then(oldValue => {
    // resolved once the action has completed
  });

Callback response:

"value"

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