SDK
SDK Java v2.x
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pfcount #

Returns the probabilistic cardinality of a HyperLogLog (opens new window) data structure, or of the merged HyperLogLog structures if more than 1 is provided (see pfadd).

[Redis documentation] (opens new window)


pfcount(keys, [options], callback) #

Arguments Type Description
keys string List of HyperLogLog key identifiers
options JSON Object Optional parameters
callback function Callback

Options #

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

Callback Response #

Returns an integer containing the aggregated probabilistic cardinality of HyperLogLog structures.

Usage #

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String[] keys = new String[]{"key1", "key2", "..."};
kuzzle.memoryStorage.pfcount(keys, new ResponseListener<Long>() {
  @Override
  public void onSuccess(int count) {
    // callback called once the action has completed
  }
  @Override
  public void onError(JSONObject error) {
  }
});

Callback response:

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