decr

Decrements the number stored at key by 1. If the key does not exist, it is set to 0 before performing the operation.

[Redis documentation]


decr(key, [options], [callback])

Arguments Type Description
key string Key identifier
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 an integer containing the updated key value.

Usage

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kuzzle.memoryStorage.decr("key", new ResponseListener<Long>() {
  @Override
  public void onSuccess(int value) {
    // callback called once the action has completed
  }

  @Override
  public void onError(JSONObject error) {
  }
});

Callback response:

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-1