msetnx #

Sets the provided keys to their respective values, only if they do not exist. If a key exists, then the whole operation is aborted and no key is set.

[Redis documentation]

msetnx(entries, [options], [callback]) #

Arguments	Type	Description
`entries`	array	List of objects each containing the key identifier to add with its associated value. Properties: `key` (key identifier), `value` (associated 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 a boolean specifying if the operation was successful or not.

Usage #

var entries = [
  {key: 'key1', value: 'foo'},
  {key: 'key2', value: 'bar'},
  {key: '...', value: '...'}
];
// Using callbacks (NodeJS or Web Browser)
kuzzle.memoryStorage.msetnx(entries, function (err, status) {
  // callback called once the action has completed
});
// Using promises (NodeJS only)
kuzzle.memoryStorage.msetnxPromise(entries)
  .then(status => {
    // resolved once the action has completed
  });

Callback response:

true

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