Support and Documentation

Forwarding database

ForwardingDatabase is a mechanism to perform additional logic before executing a query against a database. One example is to create a forwarding database that prevents returning cached query results, as in the following snippet.

ForwardingDatabase noCacheDatabase = new ForwardingDatabase() {

    protected <T> Query<T> filterQuery(Query<T> query) {
        return query.clone().noCache();


You can then use the no-cache forwarding database by specifying it in Query#using:


Because this query specified noCacheDatabase, Dari invokes the filterQuery method before executing the query.

Both Dari and Brightspot use ForwardingDatabase for a variety of scenarios. Here are a few examples: