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]

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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

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Options #

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

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Return Value #

Returns the MemoryStorage object to allow chaining.

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Callback Response #

Returns a boolean specifying if the operation was successful or not.

Usage #

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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:

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true