Interface SuggestDataProvider

    • Method Detail

      • configure

        default void configure​(Map<String,​Object> config)
        Optional method that may be called to configure the data provider. If a configuration is provided, it will be called once directly after instantiation.
        Parameters:
        config -
      • hasData

        boolean hasData​(String indexName)

        Respond with 'true' if this provider is generally able to provide data for the requested index. This is a quick check when initializing the suggesters, so it should not take too long.

        It's also possible to return a static "true" here and do the expensive availability check at the getLastDataModTime method, which is called async. If getLastDataModTime returns a value < 0, data update are canceled as well.

        Parameters:
        indexName - identifier for the requested data
        Returns:
      • getLastDataModTime

        long getLastDataModTime​(String indexName)
                         throws IOException

        Get the timestamp from when the data was modified the last time. For every change of that timestamp, the data will be pulled and indexed into suggest index.

        Setting the timestamp at the data is optional, but if it is set there, it MUST be the same timestamp, otherwise the data is rejected. This feature is used to avoid potential concurrency issues.

        If data is not available at all, a value < 0 should be returned.

        Parameters:
        indexName - identifier for the requested data
        Returns:
        unix timestamp in millis
        Throws:
        IOException